MasterFormat: 95

Download this Radiant-Heating and Snowmelting Equipment Specification for   WORD | WP | RTF | TEXT

Find over 500 more construction specifications | Arcat.com

	SECTION 15560
	Copyright 2008 - 2008 ARCAT, Inc. - All rights reserved
	RADIANT-HEATING AND SNOWMELTING
	** NOTE TO SPECIFIER ** Watts Radiant, Inc. Subsidiary of Watts Water Technologies, Inc.; radiant heating systems for interior and exterior applications. . This section is based on the products of Watts Radiant, Inc. Subsidiary of Watts Water Technologies, Inc., which is located at: 4500 E. Progress Place Springfield, MO 65803 Toll Free Tel: 800-276-2419 Tel: 417-864-6108 Email: request info Web: www.wattsradiant.com {click Here} for additional information. Watts Radiant is the largest American-owned radiant floor heating and snow melting company in North America and the only company with strong product lines in both hydronic and electric radiant heat technology. From professional athletic fields to small baths, Watts Radiant has more options for radiant heating than anyone. Watts Radiant, located in Springfield, MO, is a subsidiary of Watts Water Technologies (WTS-NYSE) of North Andover, Massachusetts. Watts Radiant is a manufacturer of radiant heat components and a supplier of materials from Watts companies around the world. Several degreed engineers are on staff to help with your design using our engineering design software, RadiantWorks Professional. Watts Radiant also supplies hydronic and electric components for snow melt systems, turf warming, rootzone heating, and permafrost protection. Specifiable, factory-supported mechanical panels are designed and built for radiant floor heating or snow melting applications.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Radiant floor heating and snow melting systems for various applications and control strategies, using Onix (EPDM) tubing and appropriate fittings.
		B.	Radiant floor heating and snow melting systems for various applications and control strategies, using cross-linked polyethylene (PEX) tubing and appropriate fittings.
		C.	Radiant floor heating and snow melting systems for various applications and control strategies, using PEX-Aluminum-PEX (PAP) tubing and appropriate fittings.
		D.	Flexible, pre-insulated piping system that incorporates cross-linked polyethylene (PEX) service tubing for hot and cold fluid distribution systems.
		E.	Radiant floor heating systems for various floor constructions and control strategies, using electric heating mat and cable assemblies.
		F.	Radiant snow melting systems using electric mats and cables embedded in concrete, asphalt, and below pavers.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 02551 - Underground Hydronic Piping.
		B.	Section 03300 - Concrete.
		C.	Section 06100 - Rough Carpentry.
		D.	Section 07210 - Insulation.
		E.	Section 15093 - Sleeves and Sleeve Seals for HVAC Piping
		F.	Section 15181 - Hydronic Piping.
		G.	Section 15772 - Radiant Heating Piping.
		H.	Section 15774 - Radiant-Heating Electric Cables.
	** NOTE TO SPECIFIER ** Article below may be omitted when specifying manufacturer's proprietary products and recommended installation. Retain References Article when specifying products and installation by an industry reference standard. If retained, list standard(s) referenced in this section. Indicate issuing authority name, acronym, standard designation and title. Establish policy for indicating edition date of standard referenced. Conditions of the Contract or Division 1 References Section may establish the edition date of standards. This article does not require compliance with standard. It is a listing of all references used in this section.
	1.3	REFERENCES
		A.	General: standards listed by reference, including revisions by issuing authority, form a part of this specification section to the extent indicated. Standards listed are identified by issuing authority, authority abbreviation, designation number, title or other designation established by issuing authority. Standards subsequently referenced herein are referred to by issuing authority abbreviation and standard designation.
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		B.	ASTM International (ASTM):
			1.	Onix:
				a.	ASTM D 380 - Standard Test Methods for Rubber Hose.
				b.	ASTM D 395 - Standard Test Methods for Rubber Property - Compression Set.
				c.	ASTM D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension.
				d.	ASTM D 413 - Standard Test Methods for Rubber Property - Adhesion to Flexible Substrate.
				e.	ASTM D 471 - Standard Test Method for Rubber Property - Effect of Liquids.
				f.	ASTM D 573 - Standard Test Method for Rubber - Deterioration in an Air Oven.
				g.	ASTM D 1149 - Standard Test Method for Rubber Deterioration - Surface Ozone Cracking in a Chamber.
			2.	RadiantPEX-AL:
				a.	ASTM F 1281 - Standard Specification for Cross-linked Polyethylene/Aluminum/Cross-linked Polyethylene (PEX/AL/PEX) Pressure Pipe.
				b.	ASTM F 1335 - Standard Specification for Pressure-Rated Composite Pipe for Elevated Temperature Service.
			3.	R-flex:
				a.	ASTM F 2165 - Standard Specification for Flexible Pre-Insulated Piping.
		C.	Certified to ASTM International by NSF:
			1.	RadiantPEX and RadiantPEX+:
				a.	ASTM F 876 - Standard Specification for Cross-linked Polyethylene (PEX) Tubing.
				b.	ASTM F 877 - Standard Specification for Cross-linked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems.
		D.	Certified to ASTM International, UL, NFPA and ULC by Intertek:
			1.	RadiantPEX and RadiantPEX+:
				a.	ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Test Materials.
				b.	ASTM E119 - UL 263 and NFPA 251 Fire Tests of Building Construction and Materials.
				c.	CAN/ULC S101-04, Standard Test Methods for Fire Tests of Building Construction and Materials.
		E.	Certified to Canadian Standards Association (CSA) by NSF:
			1.	RadiantPEX and RadiantPEX+:
				a.	CAN/CSA B137.5 Cross-linked Polyethylene (PEX) Tubing Systems for Pressure Applications.
		F.	Certified to International Code Council (ICC) by NSF:
			1.	Onix:
				a.	ICC Evaluation Service (ES) Evaluation Report No. ESR 1155.
			2.	RadiantPEX and RadiantPEX+:
				a.	International Mechanical Code (IMC).
				b.	International Building Code (IBC).
		G.	Certified to International Association of Plumbing and Mechanical Officials (IAPMO) by NSF:
			1.	RadiantPEX, RadiantPEX+, and RadiantPEX-AL:
				a.	Uniform Mechanical Code (UMC).
		H.	Canadian Standards Association (CSA):
			1.	HeatWeave and ProMelt:
				a.	CAN/CSA C22.2 No. 130 - Requirements for Electrical Resistance Heating Cables and Heating Device Sets.
				b.	CSA C02.2 No. 24 - Temperature-Indicating and - Regulating Equipment.
				c.	CAN/CSA C22.2 No. 14 - Industrial Control Equipment.
		I.	German Institute for Standards (Deutsches Institut fur Normung e.V., DIN):
			1.	RadiantPEX, RadiantPEX+, and R-flex:
				a.	DIN 4726 Pipelines of Plastic Materials Used in Warm Water Floor Heating Systems; General Requirements.
			2.	R-flex:
				a.	DIN 16892 Crosslinked Polyethylene Pipes - General Quality Requirements and Testing.
				b.	DIN 16893 Crosslinked Polyethylene Pipes - Dimensions.
		J.	International Association of Plumbing and Mechanical Officials (IAPMO):
			1.	RadiantPEX and RadiantPEX+:
				a.	Certificate of Listing.
		K.	International Code Council (ICC):
			1.	Onix:
				a.	ICC Evaluation Service (ES) Legacy Report No. 95-47.02.
		L.	National Fire Protection Association (NFPA):
			1.	HeatWeave and ProMelt:
				a.	NFPA 70, National Electrical Code (NEC), Sec. 424 and 426.
		M.	National Sanitary Foundation (NSF) International:
			1.	RadiantPEX and RadiantPEX+:
				a.	NSF-pw (potable water).
				b.	NSF-RFH (Radiant Floor Heating).
				c.	NSF CL - TD and CL - R (as specified in NSF Protocol P - 171).
		N.	Plastics Pipe Institute (PPI):
			1.	RadiantPEX and RadiantPEX+:
				a.	Technical Report TR - 3 Policies and Procedures for Developing Recommended Hydrostatic Design Stresses for Thermoplastic Pipe Materials.
				b.	Technical Report TR - 4 Recommended Hydrostatic Strengths and Design Stresses for Thermoplastic Piping and Fitting Compounds.
		O.	Tile Council of North America (TCNA):
			1.	HeatWeave and ProMelt:
				a.	Any applicable standards relating to the installation of tile or stone.
				b.	TCNA #RH115-0 - Latex - Portland Cement Mortar, Electric System.
				c.	TCNA #RH116-07 - Cementitious Self-leveling Underlayment, Bonded Electric System Thin-set.
				d.	TCNA #RH130-07 - EGP (Exterior Glue Plywood) Latex - Portland Cement Mortar Electric System.
				e.	TCNA #RH135-07 - Backer Board Electric System Thin-set.
		P.	Underwriters Laboratory (UL):
			1.	HeatWeave and ProMelt:
				a.	UL Standard 508A - Industrial Control Panels.
				b.	UL Standard 515 - Electric Resistance Heat Tracing for Commercial and Industrial Applications.
				c.	UL Standard 758 - Appliance Wiring Materials.
				d.	UL Standard 873 - Temperature-Indicating and Regulating Equipment.
				e.	UL Standard 1673 - Electric Radiant Heating Cables.
				f.	UL Standard 1693 - Electric Radiant Heating Panels and Heating Panel Sets.
		Q.	American National Standards Institute (ANSI)/Underwriters Laboratories, Inc. (UL):
			1.	HeatWeave and ProMelt:
				a.	Any applicable standards relating to the installation of tile or stone.
		R.	Watts Radiant:
			1.	Onix Installation Manual.
			2.	RadiantWorks Professional Software.
			3.	RadiantPEX, Radiant PEX+, and RadiantPEX-AL Installation Manual.
			4.	HydroNex Installation and Operations Manual.
			5.	Watts Radiant R-flex Pre-insulated PEX Installation Manual, current edition.
			6.	Watts Radiant HeatWeave Installation Manual.
			7.	Watts Radiant HeatWeave WarmWire Installation Manual.
			8.	Watts Radiant HeatWeave UnderFloor Installation Manual.
			9.	Watts Radiant HeatWeave Installation Video.
			10.	Watts Radiant Electric Floor Warming Design Software (WireWorks).
			11.	Radiant Electric Emissions Test (REET).
			12.	Watts Radiant ProMelt Installation Manual.
	** NOTE TO SPECIFIER ** Article below should be restricted to statements describing design or performance requirements and functional (not dimensional) tolerances of a complete system. Limit descriptions to composite and operational properties required to link components of a system together and to interface with other systems.
	1.4	SYSTEM DESCRIPTION
		A.	Hydronic System Design Requirements:
	** NOTE TO SPECIFIER ** Delete tubing type not required.
			1.	Onix (EPDM) Tubing: Pressure Ratings: Tubing shall be rated for continuous working pressures of 100 psi (689 kPa) and 180 degrees F (82 degrees C), a burst pressure of not less than 800 psi (5516 kPa) at 70 degrees F (21 degrees C) or 600 psi (4137 kPa) at 180 degrees F (82 degrees C).
			2.	Cross-linked Polyethylene Tubing (PEX): Standard Grade hydrostatic pressure ratings from Plastics Pipe Institute in accordance with TR-3 as listed in TR-4. The following three standard-grade hydrostatic ratings are required:
				a.	200 degrees F (93 degrees C) at 80 psi (551 kPa).
				b.	180 degrees F (82 degrees C) at 100 psi (689 kPa).
				c.	73.4 degrees F (23 degrees C) at 160 psi (1102 kPa).
			3.	Cross-linked Polyethylene-Aluminum-Cross-linked Polyethylene Composite Pipe (PAP): Standard Grade hydrostatic pressure ratings. The following four standard-grade hydrostatic ratings are required:
				a.	200 degrees F (93 degrees C) at 100 psi (689 kPa).
				b.	180 degrees F (82 degrees C) at 125 psi (862 kPa).
				c.	140 degrees F (60 degrees C) at 160 psi (1102 kPa).
				d.	73.4 degrees F (23 degrees C) at 200 psi (1379 kPa).
		B.	Hydronic System Performance Requirements: Provide hydronic system that is manufactured, fabricated and installed to comply with regulatory agencies and authorities with jurisdiction, and maintain performance criteria stated by the tubing manufacturer without defects, damage or failure.
	** NOTE TO SPECIFIER ** Delete tubing type not required.
			1.	Onix (EPDM) Tubing
				a.	Show compliance with ASTM D380.
				b.	Show compliance with ASTM D395.
				c.	Show compliance with ASTM D412.
				d.	Show compliance with ASTM D413.
				e.	Show compliance with ASTM D471.
				f.	Show compliance with ASTM D573.
				g.	Show compliance with ASTM D1149.
			2.	Cross-linked Polyethylene Tubing (PEX):
				a.	Show compliance with ASTM F877.
				b.	Show compliance with DIN 4726 regarding oxygen diffusion concerns where applicable.
				c.	Show compliance with NFPA 90A requirements of flame spread/smoke development rating of 25/50 in accordance with ASTM E84 through certification listings with Intertek.
				d.	Show compliance with ASTM E119, UL 263, NFPA 251 and CAN/ULC S101 through certification listings with Intertek as follows:
					1)	Intertek Design No. WR/WA 60-01: 1 hour wood or steel stud/gypsum wallboard wall assembly.
					2)	Intertek Design No. WR/FCA 60-01: 1 hour wood frame floor/ceiling assembly.
					3)	Intertek Design No. WR/FCA 120-01: 2 hour concrete floor/ceiling assembly.
			3.	Cross-linked Polyethylene-Aluminum-Cross-linked Polyethylene Composite Pipe (PAP):
				a.	Show compliance with ASTM F1281.
		C.	Pre-Insulated Piping System Design Requirements: The PEX service tubing is manufactured and tested in accordance with DIN 16892 and 16893. The PEX service tubing has hydrostatic ratings in accordance with the temperatures and pressures listed below. The hydrostatic ratings are:
			1.	200 degrees F (93 degrees C) at 80 psi (551 kPa).
			2.	180 degrees F (38 degrees C) at 100 psi (689 kPa).
			3.	73.4 degrees F (23 degrees C) at 160 psi (1102 kPa).
		D.	Pre-insulated Piping System Performance Requirements: Provide pre-insulated piping system that is manufactured, fabricated, and installed to comply with regulatory agencies and authorities with jurisdiction, and maintain performance criteria stated by the tubing manufacturer without defects, damage or failure.
			1.	Show compliance with DIN 16892.
			2.	Show compliance with DIN 16893.
			3.	Show compliance with DIN 4726 regarding oxygen diffusion.
			4.	Insulation of all carrier tubing shall consist of a microcellular, cross-linked polyethylene foam in multi-layer arrangements. The insulation's closed cell structure shall ensure minimal water absorption at all times to preserve insulating effect against thermal loss.
			5.	Insulation shall not crush, break, or pulverize.
			6.	All materials shall be CFC free.
			7.	The outer jacket shall be cast with a corrugated pattern along its entire length. The corrugation pattern shall provide flexibility in the longitudinal direction and rigidity against radial forces.
			8.	The corrugation shall employ a double-walled closed-cell construction to provide an extra layer of protection from piercing of the outer jacket.
			9.	Single wall exterior jackets shall be deemed not equal for the long-term protection of the Owner.
		E.	Electric Floor Warming System Design Requirements:
			1.	Show compliance with UL, CSA Standards.
			2.	Show testing to REET procedure.
			3.	Show compliance with any applicable ANSI or NTCA Standards as they relate to the installation of tile or stone.
		F.	Electric Floor Warming System Performance Requirements: Provide electric radiant floor heating system manufactured, fabricated, and installed to comply with regulatory agencies and authorities with jurisdiction, and maintain performance criteria stated by the manufacturer without defects, damage, or failure.
		G.	Electric Snow Melting System Design Requirements:
			1.	Show compliance with UL, CSA Standards
			2.	Show compliance with any applicable ANSI or NTCA Standards as they relate to the installation of tile or stone.
		H.	Electric Snow Melting System Performance Requirements:
			1.	Provide electric snow melting system manufactured, fabricated, and installed to comply with regulatory agencies and authorities with jurisdiction, and maintain performance criteria stated by the manufacturer without defects, damage, or failure.
	1.5	SUBMITTALS
		A.	General: Submit listed submittals in accordance with Conditions of the Contract and Division 1 Submittal Procedures Section.
		B.	Product Data: Submit manufacturer's product submittal data and installation instructions for each product.
		C.	Shop Drawings - Hydronic System:
			1.	Provide engineering analysis using manufacturer's proprietary software.
			2.	Provide installation drawings indicating tubing layout, manifold locations, zoning requirements and manifold schedules with details required for installation of the system.
			3.	Provide mechanical schematic indicating heat source, mechanical piping and accessories from heat source to manifolds, circulators, water tempering and zone controls. Indicate supply water temperatures and flow rates to manifolds.
		D.	Shop Drawings - Pre-insulated Piping System:
			1.	Provide installation drawings indicating piping layout, piping size dimension by installation segment, vault locations, support fixtures and schedules with all details required for installation of the system.
		E.	Shop Drawings - Electric Floor Warming System:
			1.	Provide installation drawings indicating detailed mat/cable layout for each room, mat/cable dimensions, thermostat locations, zoning requirements, and/or other details required for installation of the system.
			2.	Provide electrical schematics, as needed.
		F.	Shop Drawings - Electric Snow Melting System:
			1.	Provide installation drawings indicating detailed mat/cable layout for each area, mat/cable dimensions, snow melting sensor/control locations, zoning requirements, and/or other details required for installation of the system.
			2.	Provide electrical schematics, as needed.
		G.	Samples: Submit selection and verification samples of primary materials.
		H.	Documentation:
			1.	Provide manufacturer's detailed instructions for site preparation and product installation.
			2.	Provide manufacturer's electrical power requirements and heat output in watts delivered to the structure.
			3.	Provide documentation indicating the installer is trained to install the manufacturer's products, as needed.
		I.	Quality Assurance and Control Submittals:
			1.	Test Reports: Upon request, submit test reports from recognized testing laboratories.
		J.	Closeout Submittals - Submit the following:
			1.	Warranty documents specified.
			2.	Operation and maintenance data.
			3.	Manufacturer's field reports as specified in this document.
			4.	Final, as-built, tubing layout drawing.
	1.6	QUALITY ASSURANCE
		A.	Manufacturer Qualifications:
			1.	Manufacturer shall have minimum ten years experience in similar systems.
			2.	Manufacturer shall provide products of consistent quality in appearance and physical properties.
			3.	Manufacturer shall use the highest quality products in the production of systems and components referenced in this document.
			4.	Materials shall be from single manufacturer to ensure consistent quality and compatibility.
		B.	Installer Qualifications:
			1.	Use an installer with demonstrated experience on projects of similar size and complexity and documentation proving successful completion of familiarization training hosted/approved in writing by the system manufacturer.
			2.	Electrical rough-in and connections shall be done by a licensed electrician.
		C.	Certifications: Provide letters of certification as follows:
			1.	Installer employs skilled workers holding a trade qualification license or equivalent, or apprentices under the supervision of a licensed trades person.
	** NOTE TO SPECIFIER ** Paragraph below should list obligations for compliance with specific code requirements particular to this section. General statements to comply with a particular code are typically addressed in Conditions of the Contract and Division 1 Regulatory Requirements Section. Avoid repetitive statements.
		D.	Regulatory Requirements and Approvals - Hydronic Systems: Provide a radiant floor heating system that complies with the following requirements:
			1.	International Code Council (ICC):
				a.	International Mechanical Code (IMC).
				b.	International Building Code (IBC).
				c.	ICC Evaluation Service (ES) Evaluation Report No. ESR 1155.
			2.	International Association of Plumbing and Mechanical Officials (IAPMO):
				a.	Uniform Mechanical Code (UMC).
		E.	Regulatory Requirements and Approvals - Pre-insulated Piping Systems: Ensure the pre-insulated piping system complies with all applicable codes and regulations.
		F.	Regulatory Requirements and Approvals - Electric Floor Warming Systems: Provide a radiant floor heating system that complies with the following requirements:
			1.	Heating cables for manufacture in mat form or loose cable form shall be recognized to UL 758.
			2.	Heating mats for installation in cement-based mortar or under wood subfloors shall be listed to UL 1693 and CSA C22.2 No. 130.
			3.	Heating cables for installation in cement-based mortar shall be listed to UL 1673 and CSA C22.2 No. 130.
			4.	Floor-sensing thermostats (controls) shall be GFCI Class A (5 mA) protected and listed to UL 873 and CSA C22.2 No. 24.
			5.	REET Test Results: Less than 0.25 mG.
			6.	Robinson Floor Test (ASTM C627): To meet Moderate Commercial standards.
		G.	Regulatory Requirements and Approvals - Electric Snow Melting Systems: Provide an electric snow melting system that complies with the following requirements:
			1.	Snow melting cables/mats for installation in concrete, asphalt, or under pavers shall be Listed to UL 515 and CSA C22.2 No. 130.
			2.	Snow melting sensors shall be UL listed or low-voltage.
			3.	Snow melting controls shall be Listed to UL 508a and CAN/CSA C22.2 No. 14.
		H.	Additional Quality Assurance Procedures - Electric Snow Melting Systems:
			1.	Manufacturer to submit finished mat/cable assembly to minimum 1500 volt dielectric test for insulation integrity and perform resistance verification check.
			2.	Verify mat/cable is affixed with UL or ETL Marked sticker on power lead indicating model, serial number, manufacture date, resistance, total output, and voltage.
	** NOTE TO SPECIFIER ** Retain paragraph below if pre-installation meeting is required.
		I.	Pre-installation Meetings:
			1.	Verify project requirements, substrate conditions, excavation conditions, system performance requirements, coverings, manufacturer's installation instructions and warranty requirements.
			2.	Review project construction timeline to ensure compliance or discuss modifications as required.
			3.	Coordinate with other trade representatives to verify areas of responsibility.
			4.	Establish the frequency (during construction phase of the project) the engineer intends for site visits and inspections by the manufacturer's representative.
	** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project. Delete if not required.
		J.	Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
			1.	Finish areas designated by Architect.
			2.	Do not proceed with remaining work until workmanship, color, and sheen are approved by Architect.
			3.	Refinish mock-up area as required to produce acceptable work.
	1.7	DELIVERY, STORAGE AND HANDLING
		A.	General: Comply with Division 1 Product Requirements Section.
		B.	Comply with manufacturer's ordering instructions and lead-time requirements to avoid construction delays.
		C.	Deliver materials in manufacturer's original, unopened, undamaged containers with identification labels intact.
		D.	Store materials protected from exposure to harmful environmental conditions and at temperature and humidity conditions recommended by the manufacturer.
	** NOTE TO SPECIFIER ** Delete if not required.
			1.	Hydronic System:
				a.	Store tubing in cartons or under cover to avoid dirt or foreign material from entering the tubing.
				b.	Do not expose RadiantPEX, RadiantPEX+ or RadiantPEX-AL tubing to direct sunlight for more than 30 days. If construction delays are encountered, cover the tubing that is exposed to direct sunlight.
			2.	Pre-insulated Piping Systems:
				a.	Store pre-insulated piping coils under cover or supply plugs to prevent dirt or foreign material from entering the service tubing.
				b.	Do not expose the PEX service tubing to direct sunlight for more than 30 days. If construction delays are encountered, cover the tubing that is exposed to direct sunlight.
	1.8	PROJECT CONDITIONS
		A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
	** NOTE TO SPECIFIER ** Delete if not required.
		B.	Mortar-Set Systems: Mortar shall cure for 25 days (or time period specified by mortar manufacturer) prior to starting heating systems.
	** NOTE TO SPECIFIER ** Coordinate article below with Conditions of the Contract and with Division 1 Closeout Submittals (Warranty) Section. Use this article to require special or extended warranty or bond covering the work of this section.
	1.9	WARRANTY
		A.	Project Warranty: Refer to Conditions of the Contract for project warranty provisions.
		B.	Manufacturer's Warranty - Hydronic Systems: Submit, for Owner's acceptance, manufacturer's standard warranty document executed by authorized company official. Manufacturer's warranty is in addition to, and not a limitation of, other rights Owner may have under contract documents.
			1.	Submit, for Owner’s acceptance, manufacturer’s standard warranty document executed by authorized company official.
			2.	Manufacturer’s warranty is in addition to, and not a limitation of, other rights Owner may have under contract documents.
				a.	Warranty covers the repair or replacement of any tubing or fittings proven defective.
				b.	Warranty may transfer to subsequent owners.
				c.	Warranty Period for Tubing is 25-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of substantial completion.
				d.	Warranty Period for Manifolds and Fittings is 2-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of substantial completion.
				e.	Warranty period for Controls and Electrical components is a 2-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of substantial completion.
		C.	Manufacturer's Warranty - Pre-insulated Piping Systems:
			1.	Submit, for Owner's acceptance, manufacturer's standard warranty document executed by authorized company official.
			2.	Manufacturer's warranty is in addition to, and not a limitation of, other rights Owner may have under contract documents.
				a.	Warranty covers the repair or replacement of any piping or fittings proven defective.
				b.	Warranty may transfer to subsequent owners.
				c.	The manufacturer's warranty shall be a minimum of 10 years, non-prorated, on the carrier tubing and 10 years on the fittings, insulation, and cover beginning with the date of substantial completion.
		D.	Manufacturer's Warranty - Electric Systems:
			1.	Submit manufacturer's standard warranty document executed by authorized company official.
			2.	Manufacturer's warranty is in addition to, and not a limitation of, other rights Owner may have under contract documents.
				a.	Warranty covers the repair or replacement of any materials proven defective.
				b.	Warranty may transfer to subsequent owners.
	** NOTE TO SPECIFIER ** Coordinate subparagraph below with manufacturer's warranty requirements. Delete if not required.
				c.	Warranty Period for Electric Floor Heating Mats/Cables: Refer to manufacturer's 25-year, prorated warranty against failure due to defect in material or workmanship, beginning with date of manufacture.
				d.	Warranty Period for Electric Snow Melting Mats/Cables: Refer to manufacturer's 10-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of manufacture.
				e.	Warranty Period for Thermostats, Controls, and Accessories: Refer to manufacturer's 1-year (2-year for SunStat), non-prorated warranty against failure due to defect in material or workmanship, beginning with date of purchase.
	1.10	SYSTEM START-UP
		A.	Do not start the system for a minimum of 25 days or as specified by mortar, concrete and/or covering manufacturer as applicable.
		B.	Verify all electrical components are installed per local and National Electrical Code (NEC) prior to start-up.
	1.11	OWNER'S INSTRUCTIONS
		A.	Instruct Owner about operation and maintenance of installed system.
		B.	Provide Owner with manufacturer's installation instructions for installed components within the system, including ohm reading information for the mats/cables as recorded in installation manual.
		C.	Provide Owner with all operating instructions/documents for sensors and controls.
		D.	Provide Owner with copies of any detailed layout drawings and photos of installed product before coverings are installed.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Watts Radiant, Inc. Subsidiary of Watts Water Technologies, Inc., which is located at: 4500 E. Progress Place ; Springfield, MO 65803; Toll Free Tel: 800-276-2419; Tel: 417-864-6108; Email: request info; Web: www.wattsradiant.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 1.
			1.	Products, components and services specified are manufactured by and/or available from the specified equipment manufacturer.
			2.	Alternative equipment manufacturers shall submit required data for all electrical, mechanical, structural, engineering, etc. revisions for an equivalent system for approval 15 days prior to bid.
			3.	Alternative equipment manufacturers shall submit completed design layout to the project engineer for approval. Plagiarism of another manufacturer's design is unacceptable.
	** NOTE TO SPECIFIER ** Specify materials to be furnished. This article may be omitted and the materials can be included with the description of a manufactured unit, equipment, component or accessory. Delete tubing, materials and accessories not required.
	2.2	HYDRONIC RADIANT SYSTEM TUBING
		A.	Tubing: Onix (EPDM)
			1.	Material: a spiral braided multi-composite design constructed of a Durel inner tube, an aluminum AlumaShield solid oxygen diffusion barrier, a contour extrusion layer, an Aramid reinforced fiber, and an outer cover of HiGuard.
			2.	Pressure Ratings: Refer to Design Requirements.
			3.	Temperature/Pressure Ratings: shall be capable of withstanding temperatures of -35 degrees F (-37 degrees C) to 325 degrees F (163 degrees C) intermittently without delimitation. Tubing shall be listed to 180 degrees F (82 degrees C) at 100 psi (0.69 MPa) and shall remain flexible at temperatures down to -35 degrees F (-37 degrees C).
			4.	UV Resistance: Tubing shall be UV-resistant, so as not to degrade when exposed to continuous sunlight.
			5.	Crushability: Tubing shall be crush proof, recovering its original cross section area after flattening due to construction, site, or installation abuse.
			6.	Minimum Bend Radius:
				a.	3/8 inch (9.53mm) Onix - 3 inch (76 mm) bend radius.
				b.	1/2 inch (12.7mm) Onix - 4 inch (102 mm) bend radius.
				c.	5/8 inch (15.88mm) Onix - 5 inch (127 mm) bend radius.
				d.	3/4 inch (19.05mm) Onix - 6 inch (152 mm) bend radius.
				e.	1 inch (25.4mm) Onix - 8 inch (203 mm) bend radius.
			7.	Barrier Tubing Type: Watts Radiant Onix Tubing
				a.	Tubing shall have an oxygen permeation inhibitor. The oxygen barrier shall be completely encapsulated in the tubing, protected by the outside cover. The oxygen barrier shall be made of a solid aluminum material. The resistance shall be consistent across the entire temperature rating 0 to 180 degrees F (-18 to 82 degrees C).
				b.	Nominal Inside Diameter: Provide tubing with the following nominal inside diameters:
					1)	3/8 inch (9.53 mm).
					2)	1/2 inch (12.7 mm).
					3)	5/8 inch (15.88 mm).
					4)	3/4 inch (19.05 mm).
					5)	1 inch (25.4 mm).
		B.	Tubing: Cross-linked Polyethylene (PEX)
			1.	Material: Cross-linked polyethylene (PEX) manufactured by PEX-b or Silane method to ensure the highest level of oxidation protection.
			2.	Material Standard: Manufactured in accordance with ASTM F876 and ASTM F877 and tested for compliance by an independent third-party agency.
			3.	Pressure Ratings: Standard Grade hydrostatic design and pressure ratings as issued by the Plastics Pipe Institute (PPI), a division of the Society of the Plastics Industry (SPI).
			4.	Temperature/Pressure Ratings: shall be capable of withstanding temperatures of 73.4 degrees F (23 degrees C) at 160 psi (1.10 MPa), 180 degrees F (82.2 degrees C) at 100 psi (0.69 MPa), and 200 degrees F (93.3 degrees C) at 80 psi (0.55 MPa).
			5.	Minimum Bend Radius (Cold Bending): No less than six times the outside diameter. Use the tubing manufacturer's bend supports if radius is less than stated.
			6.	Barrier Tubing Type: Watts Radiant RadiantPEX+.
				a.	Watts Radiant RadiantPEX+ tubing with an oxygen diffusion barrier shall not exceed an oxygen diffusion rate of 0.10 g/cubic meter (.000062 lb/cu. ft.) per day at 104 degrees F (40 degrees C) water temperature in accordance with German DIN 4726. Watts Radiant RadiantPEX+ also adds a protective polypropylene layer to the outside of the EVOH barrier.
				b.	Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated:
					1)	3/8 inch (9.53 mm).
					2)	1/2 inch (12.7 mm).
					3)	5/8 inch (15.88 mm).
					4)	3/4 inch (19.05 mm).
					5)	1 inch (25.4 mm).
			7.	Barrier Tubing Type: Watts Radiant RadiantPEX.
				a.	Watts Radiant RadiantPEX tubing with an oxygen diffusion barrier shall not exceed an oxygen diffusion rate of 0.10 g/cubic meter (.000062 lb/cu. ft.) per day at 104 degrees F (40 degrees C) water temperature in accordance with German DIN 4726.
				b.	Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated:
					1)	1-1/4 inch (31.75 mm).
					2)	1-1/2 inch (38.1 mm).
					3)	2 inch (50.8 mm).
			8.	Non-Barrier Tubing Type: Watts WaterPEX.
				a.	Watts WaterPEX tubing does not feature an oxygen diffusion barrier.
				b.	Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated:
					1)	3/8 inch (9.53 mm).
					2)	1/2 inch (12.7 mm).
					3)	5/8 inch (15.88 mm).
					4)	3/4 inch (19.05 mm).
					5)	1 inch (25.4 mm).
					6)	1-1/4 inch (31.75 mm).
					7)	1-1/2 inch (38.1 mm).
					8)	2 inch (50.8 mm).
				c.	An oxygen diffusion barrier tubing is not required if one of the following design strategies is used:
					1)	Isolate the ferrous materials in the boiler and other components within the primary side of the mechanical system with a heat exchanger.
						a)	Use non-ferrous components within the secondary system side (e.g., pumps, expansion tanks, etc.).
					2)	Use non-ferrous components within the entire fluid pathway.
				d.	Use Watts Radiant RadiantPEX or RadiantPEX+ tubing when oxygen diffusion barrier tubing is required. Use Watts WaterPEX when non-barrier tubing is required.
		C.	Tubing: Cross-linked Polyethylene-Aluminum-Cross-linked Polyethylene
			1.	Material: Cross-linked polyethylene with aluminum (PAP) manufactured by PEX-b or Silane method with an aluminum middle core.
			2.	Material Standard: Manufactured in accordance with ASTM F1281 and tested for compliance by an independent third-party agency
			3.	Temperature/Pressure Ratings: shall be capable of withstanding temperatures of 73.4 degrees F (23 degrees C) at 160 psi (1.10 MPa), 180 degrees F (82.2 degrees C) at 100 psi (0.69 MPa), and 200 degrees F (93.3 degrees C) at 80 psi (0.55 MPa).
			4.	Minimum Bend Radius (Cold Bending): No less than five times the outside diameter. Use the tubing manufacturer's bend supports or tubing benders if radius is less than stated.
			5.	Watts Radiant RadiantPEX-AL tubing with an oxygen diffusion barrier does not exceed an oxygen diffusion rate of 0.006 grams per cubic meter per day at 104 degrees F (40 degrees C) water temperature in accordance with German DIN 4726.
			6.	Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F1281, as indicated:
				a.	1/2 inch (12 mm) nominal = 0.472 inch (12 mm).
				b.	5/8 inch (16 mm) nominal = 0.630 inch (16 mm).
				c.	3/4 inch (20 mm) nominal = 0.787 inch (20 mm).
				d.	1 inch (25.4 mm) nominal = 0.984 inch (25 mm).
	2.3	HYDRONIC RADIANT SYSTEM MANIFOLDS AND FITTINGS
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists manifold requirements for residential and light commercial applications. Manifold can support multiple zoning (thermostats) from each manifold location. Delete this article if this type of manifold is not utilized.
		A.	Manifolds (residential and light Commercial, stainless steel):
			1.	For system compatibility, use 1 or 1-1/2 inch (25 mm to 38 mm) stainless steel manifolds offered by the respective PEX tubing manufacturer.
			2.	Manifolds shall provide individual flow control for each loop of the manifold through valve actuators available from the manifold supplier.
			3.	Manifolds shall feature manual flow balancing capability within the manifold body for balancing unequal loop lengths across the manifold. Balance valves shall not be ball valves.
			4.	Manifolds accommodate 3/8 to 3/4 inch (9.5 mm to 19 mm) Onix, RadiantPEX+ or RadiantPEX-AL tubing.
			5.	Each manifold location shall have the ability to vent air manually from the system.
			6.	Stainless Steel 1 inch (25 mm) Manifolds
				a.	Heavy-duty, DIN Standard, 304 stainless steel
				b.	Matching fittings and accessories are made of solid brass and are heavily plated with nickel to match the appearance of the manifold trunk.
				c.	Internal balancing valves
				d.	0 - 2-1/2 gpm (0 - 0.16 L/sec)flow meters
				e.	Manifold brackets
				f.	All connections are BSP (British Standard Pipe) or straight thread and require the use of the included gasket.
				g.	2-1/8 inch (54 mm) OC circuit spacing
				h.	12 gpm (.75 L/sec) maximum flow rate
				i.	167 degrees F (75 degrees C) maximum operating temperature
				j.	87 psi (600 kPa) maximum operating pressure
				k.	2 gpm (0.16 L/sec) per circuit maximum flow rate
			7.	Stainless Steel 1-1/2 inch (38 mm) Manifolds:
				a.	Heavy-duty, DIN standard, 304 stainless steel.
				b.	Matching fittings and accessories are made of solid brass and are heavily plated with nickel to match the appearance of the manifold trunk.
				c.	Internal balancing valves.
				d.	0 - 4 gpm (0 to 0.25 L/sec) flow meters.
				e.	Manifold brackets.
				f.	All connections are BSP (British Standard Pipe) or straight thread and require the use of the included gasket.
				g.	2-1/8 inch (54 mm) OC circuit spacing.
				h.	22 gpm (1.4 L/sec) maximum flow rate.
				i.	167 degrees F (75 degrees C) maximum operating temperature.
				j.	87 psi (600 kPa) maximum operating pressure.
				k.	4 gpm (0.25 L/sec) per circuit maximum flow rate.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists buried in ground manifold requirements for commercial applications. Manifold designed to support single zoning from each manifold location. Delete this article if this type of manifold is not utilized.
		B.	Manifolds (commercial, Copper):
			1.	Provide 1 inch (25 mm) or larger Copper manifolds manufactured from L-copper and offered by the respective tubing manufacturer for system compatibility.
				a.	Install manifolds with optional isolation valves located on both the supply and return manifold.
				b.	Each manifold location shall have the ability to vent air manually from the system.
			2.	Provide Copper manifolds approved for use in systems free of ferrous materials, or isolate ferrous material to eliminate corrosion damage due to oxygen diffusion.
			3.	Balancing
				a.	Design individual loop lengths across the manifold within 10 percent of each other in length.
				b.	Install supply and return piping to the manifold in a reverse-return configuration to ensure self-balancing.
				c.	Where the supply and return piping is in direct-return configuration, use manifolds with balancing valves or balance flow setters on the return leg of each manifold to the mains.
		C.	Manifold Mounting Boxes:
			1.	Sizes: Watts Radiant manifold mounting boxes come in three sizes:
				a.	15-3/4 inches by 28-1/2 inches by 4-1/4 inches (400 mm by 724 mm by 108 mm).
				b.	24-1/2 inches by 28-1/2 inches by 4-3/8 inches (622 mm by 724 mm by 111 mm).
				c.	39-1/2 inches by 28-1/2 inches by 4-3/8 inches (1003 mm by 724 mm by 111 mm).
			2.	Each box shall be designed to be recessed into a 4 inch or 6 inch (102 mm or 152 mm) stud wall.
			3.	Included elevators can raise the box from 1-1/2 inches to 4-1/2 inches (38 mm to 114 mm) off of the floor.
			4.	Each manifold box is constructed of powder- coated sheet metal, providing increased resistance to corrosion and job- site abuse.
			5.	Inside Manifold Mounting Brackets:
				a.	Manifold Boxes come with two fixed horizontal attachment rails and two adjustable rails.
				b.	Each Watts Radiant Manifold option will utilize different rail positions, depending on the bracket used.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists valved copper manifold requirements for commercial applications. Manifold designed to support single zoning from each manifold location. Delete this article if this type of manifold is not utilized.
		D.	Fittings:
			1.	For system compatibility, use fittings offered by the tubing manufacturer.
			2.	Onix:
				a.	Watts Radiant barbed insert fittings shall be provided.
				b.	Only Watts Radiant SelfTite constant-tension spring clamps or TorqueTite screw clamps are approved.
				c.	Available connections:
					1)	Sweat.
					2)	NPT.
					3)	BSP.
				d.	Material:
					1)	UNS 31400 Copper Alloy.
					2)	UNS 36000 Copper Alloy.
					3)	UNS 37700 Copper Alloy.
			3.	RadiantPEX and RadiantPEX+:
				a.	The fitting assembly shall comply with ASTM F877 and CAN/CSA B137.5 requirements.
				b.	Fittings shall be designed to work with either ASTM F1807 CrimpRings or ASTM F2098 CinchClamps or a Compression ferrule, and are designed to be used with ASTM F876 (SDR-9) rated PEX tubing.
				c.	Available connections:
					1)	Sweat.
					2)	NPT.
					3)	BSP.
				d.	Material:
					1)	UNS 31400 Copper Alloy.
					2)	UNS 36000 Copper Alloy.
					3)	UNS 37700 Copper Alloy.
			4.	RadiantPEX-AL:
				a.	Only Watts Radiant RadiantPEX-AL stainless steel Press Fitting or Compression Fitting is approved.
				b.	The fitting assembly shall comply with ASTM F1281.
				c.	Available connections:
					1)	Sweat.
					2)	NPT.
					3)	BSP.
	2.4	HYDRONIC RADIANT SYSTEM SUPPLY AND RETURN PIPING
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice.
		A.	Supply-and-return Piping to the Manifolds (above ground piping):
			1.	Properly size supply and return distribution piping for the given volume and velocities required at system design.
			2.	Use compatible distribution piping material (Watts Radiant Onix, Watts Radiant RadiantPEX, Watts Radiant RadiantPEX+, Watts Radiant RadiantPEX-AL, or type M copper or black iron piping) for all supply fluid temperatures and flows in systems with ferrous components.
				a.	When using Watts Radiant RadiantPEX tubing, do not exceed 200 degrees F (93 degrees C) at 80 psi (551 kPa).
				b.	When using Watts Radiant RadiantPEX+ tubing, do not exceed 200 degrees F (93 degrees C) at 80 psi (551 kPa).
				c.	When using Watts Radiant RadiantPEX-AL tubing, do not exceed 200 degrees F (93 degrees C) at 100 psi (689 kPa).
				d.	When using Watts Radiant Onix tubing, do not exceed 180 degrees F (82 degrees C) at 100 psi (689 kPa).
			3.	Use suitable distribution piping material (i.e., Watts WaterPEX or HDPE) for systems free of or isolated from ferrous components.
				a.	When using HDPE mains, do not exceed 140 degrees F (60 degrees C) at 80 psi (551 kPa).
				b.	When using Watts WaterPEX mains, do not exceed 200 degrees F (93 degrees C) at 80 psi (551 kPa).
			4.	Do not expose Watts Radiant RadiantPEX, Watts Radiant RadiantPEX+, Watts Radiant RadiantPEX-AL or Watts WaterPEX tubing to direct sunlight. Where PEX tubing is exposed, install suitable pipe insulation around the exposed tubing.
			5.	Use fittings compatible with piping material. Fittings shall transition from distribution piping to system manifolds.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice.
		B.	Supply and Return Piping to the Manifolds (below ground piping):
			1.	Properly size supply and return distribution piping for the given volume and velocities required at system design.
			2.	Use suitable distribution piping material (Watts Radiant Onix, Watts Radiant RadiantPEX, Watts Radiant RadiantPEX+, Watts Radiant RadiantPEX-AL, Watts Radiant R-flex or type K copper or black iron piping) for all supply fluid temperatures and flows in systems with ferrous components.
				a.	When using Watts Radiant RadiantPEX tubing, do not exceed 200 degrees F (93 degrees C) at 80 psi (551 kPa).
				b.	When using Watts Radiant RadiantPEX+ tubing, do not exceed 200 degrees F (93 degrees C) at 80 psi (551 kPa).
				c.	When using Watts Radiant RadiantPEX-AL tubing, do not exceed 200 degrees F (93 degrees C) at 100 psi (689 kPa).
				d.	When using Watts Radiant Onix tubing, do not exceed 180 degrees F (82 degrees C) at 100 psi (689 kPa).
				e.	When using Watts Radiant R-flex pre-insulated piping, do not exceed 200 degrees F (93 degrees C) at 80 psi (689 kPa).
			3.	Use suitable distribution piping material (i.e., Watts WaterPEX or HDPE) for systems free of or isolated from ferrous components.
				a.	When using HDPE mains, do not exceed 140 degrees F (60 degrees C) at 80 psi (551 kPa).
				b.	When using Watts WaterPEX mains, do not exceed 200 degrees F (93 degrees C) at 80 psi (551 kPa).
			4.	If copper or black iron piping is embedded in concrete or soil, insulate or protect with sleeves.
			5.	Use fittings compatible with piping material. Fittings shall transition from distribution piping to system manifolds.
	2.5	HYDRONIC RADIANT FLOOR HEATING ROOM TEMPERATURE CONTROLS
		A.	Room Temperature Controls:
	** NOTE TO SPECIFIER ** Delete thermostats not required.
			1.	Thermostat: DualTemp, air/floor, digital, 24V.
			2.	Thermostat: DualTemp, air/floor, digital, battery.
			3.	Thermostat: DualTemp, air/floor, non-digital, 24V.
			4.	Thermostat: Digital, programmable, air, 24V.
			5.	All thermostats shall operate within a one degree differential temperature incorporating pulse-width modulation action.
			6.	Install a Watts Radiant Thermostat (heat only) with digital display in each room or zone as required.
				a.	The Watts Radiant DualTemp thermostat shall have the ability to sense the temperature of the air, floor or a combination of air and floor.
				b.	Each DualTemp shall be equipped with an internal air sensor.
	** NOTE TO SPECIFIER ** An OPTIONAL external 10k sensor which allows detection of floor temperatures may be ordered separately. ** NOTE TO SPECIFIER ** The external sensor does not have to be used if the DualTemp is to detect air temperatures only.
			7.	For multiple-zoning control, install the loop(s) per zone and install the individual valve actuators on the respective loop(s) at the manifold.
				a.	Electro Thermal Actuators:
					1)	Watts Radiant Thermal Actuators are a four-wire actuator designed for use with Watts Radiant Stainless Steel manifolds.
						a)	Actuators are normally closed and will open when power is applied.
						b)	Actuators shall consume no more than 2.5 watts.
						c)	Travel time for the actuators is approximately 90 sec. to close the end switch.
						d)	Each actuator consists of 4 wires, 2 for power, 2 for an end switch.
				b.	Zone Valve Actuator Control Module: Zone valve actuator controls operate zone valves or circuit thermal actuators by supplying 24VAC.
					1)	No more than three 2.5 VA actuator valves can be connected to any single zone terminal block.
					2)	This control system shall be designed for use with the following models of thermostats:
						a)	Watts Radiant DualTemp (3 or 4 wire).
						b)	Watts Radiant Air Only thermostats.
						c)	Any two-wire thermostats with internal battery power.
						d)	Two-wire thermostats that consume power shall not be used, as damage to either the thermostat or controller may occur.
							1)	Never connect a power consuming 2-wire thermostat to the control as damage to the thermostat and/or control may occur.
					3)	External 24/120 VAC transformer (not included) is required to operate these controls.
						a)	A 40 VA transformer for a maximum of 12 actuators.
						b)	A 60 VA transformer for a maximum of 18 actuators.
	** NOTE TO SPECIFIER ** Control options. Delete controls not required.
					4)	Master Controls:
						a)	Equipped with valve and thermostat terminals.
						b)	Incoming 24 volt power connection.
						c)	Two 8 amp, dry contact terminals for pump and boiler operation.
							1)	With end-switch capability, the Zone Control Module activates other relays or controls as required by system control strategy.
							2)	Control does not use the end-switch wires of a 4-wire actuator.
							3)	Both 2 wire and 4 wire actuators may be used.
					5)	Slave Controls:
						a)	The use of Slave units allows the control of more zones utilizing the same pump and boiler.
						b)	Up to 2 Slave controls can connect to a Master
							1)	Allows for a maximum of 18 separate zones or thermostat connections.
							2)	Both 2 wire and 4 wire actuators may be used.
	2.6	HYDRONIC RADIANT SNOW MELTING CONTROLS
		A.	Use sensors/controls provided by manufacturer:
			1.	HSC-5 Snow Melting Slab Detector.
				a.	Slab / Pavement mounted.
				b.	Senses actual pavement conditions.
				c.	Microprocessor control eliminates ice-bridging.
				d.	Provides a low-amperage output relay contact.
				e.	Heavy-duty machined brass housing.
				f.	Removable top cover.
				g.	Plug-in electronic assembly.
				h.	24 VAC.
			2.	LCD-1H Automatic Snow Switch.
				a.	Pole-mounted.
				b.	Senses both temperature and precipitation.
				c.	Isolated 3 Amp resistive/1 Amp inductive relay contact.
				d.	24 VAC.
	2.7	HYDRONIC RADIANT SYSTEM ACCESSORIES
		A.	Provide accessories associated with the installation of the radiant heating system as recommended by or available from the tubing manufacturer.
			1.	IsoTherm: The IsoTherm provides mixing control and zone pumping all in a compact, unique package that conveniently connects directly to Watts Radiant Stainless Steel manifolds.
				a.	The IsoTherm module includes the following items:
					1)	Mix Valve.
					2)	Three-speed 1/25 hp Circulator.
					3)	Temperature Gauge.
	** NOTE TO SPECIFIER ** Accessory items may include the following: Delete if not required.
					4)	Maximum Temperature Sensor.
					5)	Trunk Isolation Valves.
					6)	BSP to NPT Transition Nipple.
				b.	Mounting:
					1)	The IsoTherm can be wall mounted with standard cush clamps or other copper pipe mounted brackets.
					2)	The IsoTherm can be integrated into a standard Watts Radiant manifold box.
				c.	Capacity:
					1)	Full heat capacity of 51,000 BTU/h with a minimum boiler temperature of 158 degrees F (70 degrees C).
	** NOTE TO SPECIFIER ** A Differential By-Pass (DBP) valve is designed to prevent over-pumping of circulators with systems utilizing zone valves or circuit actuators. Delete if not required.
			2.	Pressure Differential By-pass Valve: For use with 1 inch (25.4 mm) Stainless Steel Manifolds only.
				a.	Use Watts Radiant Pressure Differential By-pass Valve with the manifolds incorporating actuators to avoid noise due to excessive water velocity.
					1)	Eliminates water velocity noise and water hammer.
					2)	Increases pump life because of minimal pressure surging as actuators open and close.
					3)	There is always correct and constant flow regardless of the number of actuators or zone valves open.
					4)	Water flow through the DBP valve shall be 25-30 percent of the total flow.
						a)	The over-pressure shall not exceed 10-15 percent of the system pressure drop.
						b)	If the zones to be by-passed have a maximum pressure drop of 0.5 psi (3.5 kPa), the DBP valve shall be set to accommodate this pressure plus 10-15 percent.
						c)	The DBP valve needs to be installed "down stream" of the main circulator
						d)	Install before the system zones
						e)	Should connect the supply line with the return line
			3.	FlowGuard:
				a.	FlowGuards shall be commercial-quality, non-electronic flow indicator and flow setter.
				b.	Cast brass construction.
				c.	Accurate visual flow indication in GPM.
				d.	Ability to set fluid flow.
				e.	FlowGuards shall allow zone-by-zone control and optimization.
				f.	No special training or electronic instrumentation required.
				g.	Sizes:
					1)	1 inch (25 mm) MNPT ends: 0.5 - 4 gpm (.03 to 0.25 L/sec) flow meter.
					2)	1 inch (25 mm) FNPT ends: 1 - 13 gpm (0.06 to 0.8 L/sec) flow meter.
			4.	Tempering Valves:
	** NOTE TO SPECIFIER ** When selecting a Mix Valve, the following guidelines shall be followed: Make sure the zones feeding from the mix valve fall within a 10 degree required temperature range. Make sure the combined flow rates of the zones do not exceed the allowable Cv rating of the mix valve.
				a.	MixTemp 180 Mixing Valve:
					1)	The MixTemp 180 is a 3-port, non-electric mix valve for use in hydronic heating systems.
						a)	Hot, cold, and mix ports are clearly marked "H", "C" and "M".
					2)	This mix valve shall be capable of delivering water temperatures ranging from 90 to 160 degrees F (32 to 71 degrees C) +/- 3 degrees.
					3)	The hydronic mix valve shall have a cast bronze body.
					4)	Copper, stainless steel and EPDM internal parts.
					5)	There are no ferrous components to corrode.
					6)	The actuator for the piston shall have lineal expansion characteristics, and shall be completely filled with a temperature-sensitive wax.
					7)	Each port on the MixTemp has a union to allow for easy servicing.
					8)	Available in 3/4 inch (19 mm) and 1 inch (25 mm) female NPT fittings.
						a)	3/4 inch Cv = 3.1 gpm (0.195 L/sec).
						b)	1 inch Cv = 3.2 gpm (0.20 L/sec).
					9)	These mixing valves are not anti-scald valves since they do not have positive shut-off in case of failure of hot or cold water supply. We do not recommend their use for shower service.
					10)	Shall have a source of return water cooler than the desired mix temperature to operate properly.
					11)	The mix valve shall not be heated in excess of 200 degrees F (93 degrees C) to prevent the liquid-filled actuator from rupture.
						a)	To prevent damage, temporarily remove the mixing valve from the unions before soldering near the mix valve.
				b.	AllTemp Mixing Valve:
					1)	The AllTemp shall be a non-electric, 3-port mix valve for use in hydronic heating systems.
					2)	Valve shall be capable of delivering water temperatures ranging from 100 to 200 degrees F (38 degrees C to 93 degrees C).
					3)	The hydronic mix valve shall have a cast bronze body.
					4)	Chrome-plated bronze piston.
					5)	The actuator for the piston shall have linear expansion characteristics, and shall be completely filled with a temperature-sensitive liquid communicating with the hydraulically-formed brass bellows.
					6)	The AllTemp is available in 1-1/4 inch (32 mm), 1-1/2 inch (38 mm) and 2 inch (51 mm) female NPT fittings.
						a)	1-1/4 inch Cv = 6.1 gpm (0.38 L/sec).
						b)	1-1/2 inch Cv = 6.2 gpm (0.39 L/sec).
						c)	2 inch Cv = 9.1 gpm (0.6 L/sec).
					7)	Mixing valves are not anti-scald valves since they do not have positive shut-off in case of failure of hot or cold water supply. Do not use for shower service.
					8)	Shall have a source of cooler return water to operate properly.
					9)	The mix valve shall not be heated in excess of 230 degrees F (110 degrees C), or the liquid-filled actuator may rupture.
						a)	To prevent damage, temporarily remove the actuator assembly from the valve body before soldering near the mix valve.
			5.	Staples: Watts Radiant Foamboard Staples.
			6.	Terminal 90-degree Exit Bend: Terminal Bend Supports.
	2.8	HYDRONIC RADIANT SYSTEM HYDRONEX MECHANICAL PANELS
		A.	Mechanical Panels shall be pre-wired, factory-built, factory-tested and factory-warranted for 5 years when installed by a factory-certified installer, or 2 years when a panel registration card is returned by the installing contractor.
			1.	Panels shall be pre-wired with 9 ft (3 m) power supply cord.
	** NOTE TO SPECIFIER ** Panels are modular, mechanical room panels designed to simplify the engineering and installation of radiant heating systems. The HydroNex system conditions and controls the distribution of hot water to and from the radiant and /or domestic water system. All panels are designed around primary/secondary piping principles and are completely pre-wired and electrically and hydraulically tested at the factory. Please call for further information or assistance with specifying HydroNex panels. Watts Radiant also offers free radiant design services. Retain, edit or delete paragraph below to suit project requirements and specifier practice. Paragraph below lists the specification for the Watts Radiant HydroNex Panels.
		B.	HydroNex panels:
			1.	Primary Panels form the foundation of the primary loop. Primary panels are designed to condition and supply boiler water to down-stream panels, which will in turn distribute boiler or mixed-temperature water to the radiant or other hydronic heating zones.
				a.	Primary Panels include the following:
					1)	1-1/4 inch (32 mm) copper primary loop.
					2)	Micro-bubble air remover.
					3)	Provide essential service and monitoring capabilities.
					4)	Wall-mounted, powder-coated white front cover and back plate.
					5)	Pre-wired circulators and controls.
					6)	CAT-5 wiring for inter-panel communication.
					7)	Single-union connection between panels.
					8)	Integrated leveling system with Z-bracket for simplified mounting
					9)	Options of manual or automatic fill assembly.
					10)	Option to include outdoor reset functions.
					11)	Option to include Domestic Hot Water with priority.
					12)	Expansion tank connection kit. Does NOT include Expansion tank.
			2.	Distribution Panels form the distribution center of the hydronic system. Distribution panels are designed to provide either high and/or mixed-temperature fluid to a variety of hydronic applications such as indirect water heaters, fancoils, baseboards, kick-space heaters and radiant zones.
				a.	Distribution panels include the following:
					1)	Wall-mounted powder-coated white front cover and back plate.
					2)	Pre-wired circulators/zone valves and controls.
					3)	CAT-5 wiring for inter-panel communication.
					4)	Single-union connection between panels.
					5)	Integrated leveling system with Z-bracket for simplified mounting.
					6)	Secondary temperature options include:
						a)	Direct: No mixing/direct piping panels
						b)	DMix: Thermostatic mix valve panels (up to 3 zones)
						c)	DMix Hybrid: Combination mix valve/direct piping panels
						d)	DVIP: Variable speed injection pump panels (up to 5 zones)
						e)	DVIP Hybrid: Variable speed injection pump/direct piping panels
						f)	DVIP Zone: Pump and zone-valve options available for zone distribution on injection panels
						g)	DHX: Heat exchanger panels for snow-melt systems or other systems that require fluid isolation
					7)	Zone supply sizes vary depending on panel type, please consult manufacturer's literature.
					8)	Capability to support Domestic Hot Water priority.
					9)	Isolation capability for the pumps.
					10)	Consult manufacturer's catalogs for further information.
			3.	Zone Panels: are zone specific distribution panels. They are often the final point of distribution in a hydronic system. All Zone Panels shall include 1 inch (25 mm) stainless steel manifolds to distribute water to radiant circuits, baseboard or other single temperature hydronic equipment.
				a.	Zone panels include the following:
					1)	Basic: 1 inch (25 mm) stainless steel manifold, 2-12 zones available.
					2)	Pump: Pre-wired zone pump (2-7 zones), 1 inch (25 mm) stainless steel manifold
					3)	Pump with Mix: Pre-wired zone pump and mix valve (2-7 zones), 1 inch (25 mm) stainless steel manifold
					4)	All types are available with pre-wired thermal actuators.
					5)	Wall enclosure with lockable access cover
			4.	Condensing boiler panels are a dedicated series designed to solve specific mechanical needs. These solutions may or may not directly incorporate other HydroNex panels.
				a.	Condensing Boiler Panel: This stand-alone panel is designed specifically to interface with most condensing boilers. It conditions and distributes boiler water to any hydronic application, including prioritized domestic hot water.
				b.	Condensing boiler panels include the following:
	** NOTE TO SPECIFIER ** Delete all circulator types not required below.
					1)	Condensing Boiler Panel, Type 1: equipped with primary, zone, and domestic water circulators
					2)	Condensing Boiler Panel, Type 3: equipped with a zone circulator only – primary and domestic water (if necessary) are provided with the heat source
	** NOTE TO SPECIFIER ** Delete items not required.
					3)	Manifold, 1-1/2 inch (38 mm) stainless steel distribution manifold (4, 5, 6 and 8 circuit).
					4)	Air remover, auto or manual fill, expansion tank connection point and kit.
					5)	Pressure differential by-pass valve.
					6)	Service valves and temperature gauges.
					7)	Wall-mounted powder-coated white front cover and back plate.
					8)	Integrated leveling system with Z-bracket for simplified mounting.
			5.	The Geothermal panel is designed to control geothermal heatsources utilizing water storage tanks and integrate them into a HydroNex system. This panel will cycle up to 3 heat pumps to ensure that the set point is maintained. Outdoor reset functionality is built into the panel to maximize efficiency.
				a.	Geo Series Panels are available in the following configurations:
					1)	Geo 1: designed to be used with a single geothermal unit
					2)	Geo 2: designed to be used with two geothermal heat sources
					3)	Geo 3: designed to be used with three geothermal heat sources
				b.	Geothermal panels include the following:
					1)	Pre-wired circulators, solenoid valve and controls.
					2)	Outdoor reset control - improves efficiency, stages and cycles up to three heat pumps.
					3)	Wall-mounted powder-coated white front cover and back plate.
					4)	CAT-5 wiring for inter-panel communication.
					5)	Single-union connection between panels.
					6)	Integrated leveling system with Z-bracket for simplified mounting.
					7)	Check valves, isolation valves, temperature and pressure gauges.
					8)	Suitable for use with up to 6 ton (total) water-to-water geothermal heat pumps.
			6.	The Source Select panel is designed to control two independent heat sources. The primary source, usually solar or geothermal, must utilize a water storage or buffer tank. Typically, this panel is used when trying to maximize heat source efficiency, so that the more economical source (normally alternative energy) is prioritized when available. In the event the primary heat source is unable to satisfy the system load, the Source Select panel will use the secondary source until the primary source has been replenished.
				a.	Source Select panels are available in the following configurations:
					1)	Type 1: equipped with setpoint control.
					2)	Type 2: equipped with variable speed injection control for Primary heat source and outdoor reset functionality.
					3)	Type 3: equipped with variable speed injection control for Primary and Secondary heat source and outdoor reset functionality.
	2.9	HYDRONIC RADIANT SYSTEM HYDROCONTROL MECHANICAL PANELS
	** NOTE TO SPECIFIER ** HydroControls are mechanical packages that are built to customer specifications and requirements. They are the connecting and controlling point between the heat source (boiler, water heater, etc.) and the thermal transfer system (floor heat piping, baseboard, domestic hot water, snowmelt piping, etc.). Retain, edit or delete paragraph below to suit project requirements and specifier practice. Paragraph below lists the specification for the custom-engineered Watts Radiant HydroControl Panels.
		A.	HydroControls and HydroSkids:
			1.	Custom engineered mechanical panels shall be pre-wired, factory-built, factory-tested and factory-warranted.
			2.	Custom engineered mechanical panels shall either be mounted on a strong, durable mounting surface or on a skid.
			3.	Each HydroControl or HydroSkid shall be custom engineered and manufactured in a factory-controlled environment.
			4.	The control system for each HydroControl or HydroSkid shall carry UL 508A Control Panel Listing through ETL.
	2.10	PRE-INSULATED PIPING SYSTEM
		A.	Service Tubing:
			1.	Material: Cross-linked polyethylene (PEX) manufactured by PEX-a or Engel method
			2.	Material Standard: Manufactured in accordance with DIN 16892 and 16893
			3.	Pressure Ratings: Hydrostatic design and pressure ratings are in accordance with the manufacturer.
			4.	The PEX service tubing in R-flex has an oxygen diffusion barrier that does not exceed an oxygen diffusion rate of 0.10 grams per cubic meter per day at 104 degrees F (40 degrees C) water temperature in accordance with German DIN 4726.
			5.	Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with DIN 16892, as indicated:
				a.	Single R-flex:
					1)	40 mm (approximately 1-1/2 inch).
					2)	50 mm (approximately 2 inch).
					3)	63 mm (approximately 2-1/2 inch).
					4)	75 mm (approximately 3 inch).
					5)	90 mm (approximately 3-1/2 inch).
					6)	110 mm (approximately 4 inch).
				b.	Dual R-flex:
					1)	28.58 mm (approximately 1-1/8 inch).
					2)	32 mm (approximately 1-1/4 inch).
					3)	40 mm (approximately 1-1/2 inch).
					4)	50 mm (approximately 2 inch).
					5)	63 mm (approximately 2-1/2 inch).
		B.	Outer Jacket
			1.	Material is corrugated seamless high-density polyethylene (HDPE)
			2.	The HDPE jacket completely encompasses and protects the insulation from moisture and damage.
			3.	The outer jacket shall be cast with a corrugated pattern along its entire length. The corrugation pattern shall provide flexibility in the longitudinal direction and rigidity against radial forces.
			4.	The corrugation shall employ a double walled closed cell construction to provide an extra layer of protection from piercing of the outer jacket.
			5.	Single wall exterior jackets shall be deemed not equal for the long-term protection of the Owner.
			6.	The outer jacket shall contain two percent carbon black to provide protection from UV degradation.
			7.	Minimum Bend Radius:
				a.	Single R-flex:
					1)	40 mm (approximately 1-1/2 inch) pre-insulated tubing with a 6.3 inch (160 mm) jacket has a bend radius of 13.8 inches (350 mm).
					2)	50 mm (approximately 2 inch) pre-insulated tubing with a 6.3 inch (160 mm) jacket has a bend radius of 17.8 inches (450 mm).
					3)	63 mm (approximately 2-1/2 inch) pre-insulated tubing with a 6.3 inch (160 mm) jacket has a bend radius of 21.7 inches (550 mm).
					4)	75 mm (approximately 3 inch) pre-insulated tubing with a 7.9 inch (200 mm) jacket has a bend radius of 31.5 inches (800 mm).
					5)	90 mm (approximately 3-1/2 inch) pre-insulated tubing with a 7.9 inch (200 mm) jacket has a bend radius of 43.4inches (1100 mm).
					6)	110 mm (approximately 4 inch) pre-insulated tubing with a 7.9 inch (200 mm) jacket has a bend radius of 47.3 inches (1200 mm).
				b.	Dual R-flex:
					1)	28.58 mm (approximately 1-1/8 inch) pre-insulated tubing with 4.9 inch (125mm) jacket has a bend radius of 11.8 inches (300 mm).
					2)	32 mm (approximately 1-1/4 inch) pre-insulated tubing with 4.9 inch (125 mm) jacket has a bend radius of 11.8 inches (300 mm).
					3)	40 mm (approximately 1-1/2 inch) pre-insulated tubing with 6.3 inch (160 mm) jacket has a bend radius of 23.7 inches (600 mm).
					4)	50 mm (approximately 2 inch) pre-insulated tubing with 7.9 inch (200 mm) jacket has a bend radius of 31.5 inches (800 mm).
					5)	63 mm (approximately 2-1/2 inch) pre-insulated tubing with 7.9 inch (200 mm) jacket has a bend radius of 47.3 inches (1200 mm).
		C.	Insulation:
			1.	The insulation shall be cross-linked polyethylene closed cell foam with a water absorption after 28 days of less than 1.04 percent.
			2.	All seams of the insulation shall be sealed.
			3.	Insulation shall not be bonded to the service tubing.
			4.	Insulation shall not crush, break or pulverize.
		D.	End Seals:
			1.	The piping manufacturer will supply all end caps.
			2.	End caps are to be installed on each end prior to connecting the service pipes and insulating the field joints.
			3.	Where necessary, the end caps will heat shrink onto the piping outer jacket forming a watertight seal.
		E.	Compression Fittings for PEX Service Tubing:
			1.	For system compatibility, use fittings offered by the tubing manufacturer.
			2.	Fittings are to be manufactured from brass.
			3.	The fitting assembly must comply with performance requirements of DIN 16892.
			4.	The fittings will consist of a compression fitting with a coupling sleeve, a fitting body insert with o-ring(s) and a bolt and a nut.
			5.	All buried fittings will be installed, insulated, and sealed in accordance with the piping manufacturer's instructions.
	2.11	PRE-INSULATED PIPING SYSTEM ACCESSORIES
		A.	Use accessories associated with the installation of the pre-insulated piping system as recommended by or available from the piping manufacturer.
		B.	Protective Casings:
			1.	Protective casings will be manufactured of high density polyethylene shells with insulation, bolts, nuts, and a sealant compound.
		C.	Protective Inspection Chambers:
			1.	The piping manufacturer will provide the inspection chambers when required by the project construction.
			2.	Inspection chambers shall be constructed of shock-resistant high density polyethylene.
			3.	Heat shrink seals as provided by the piping manufacturer shall be installed to prevent introduction of water into the vault.
		D.	Anchors:
			1.	The use of anchors, if required, within the piping system will be determined by the project engineer.
	2.12	ELECTRIC RADIANT FLOOR SYSTEM
		A.	Electric Radiant Floor Systems: HeatWeave electric radiant heating, including:
			1.	HeatWeave mats.
			2.	HeatWeave UnderFloor mats.
			3.	HeatWeave WarmWire cables.
			4.	CableStrap as applicable.
	** NOTE TO SPECIFIER ** Delete if not required for project.
	2.13	ELECTRIC RADIANT FLOOR HEATING MAT, FOR PLACEMENT IN MORTAR
		A.	Floor heating mat to have the following construction:
			1.	Heating Cable Construction: Dual heating elements that are insulated, ground system, with outer jacket
			2.	Power Lead Construction: Insulated current-carrying color-coded conductors, metal-braided outer jacket/ground, minimum 10 feet (3.05 m) long
			3.	Mat Construction: Heating cable woven into plastic open-weave mesh in pre-set spacing.
		B.	Size:
			1.	Floor heating mat size in widths of 1 foot (305 mm), 2 feet (610 mm), 3 feet (914 mm) and lengths 5 feet (1.5 m) through 80 feet (24.4 m); refer to Drawings
		C.	Ratings:
			1.	Floor heating mat shall be provided in 120VAC or 240VAC per drawings and submittals.
			2.	12 watts per square foot (41 Btu/h/sqft).
	** NOTE TO SPECIFIER ** Delete if not required for project.
	2.14	ELECTRIC RADIANT FLOOR HEATING MAT, FOR SUSPENSION BELOW WOOD SUBFLOOR
		A.	Floor heating mat to have the following construction:
			1.	Heating Cable Construction: Dual heating elements that are insulated, ground system, optional outer jacket.
			2.	Power Lead Construction: Insulated current-carrying color-coded conductors, metal-braided outer jacket/ground, and minimum 10 feet (3.05 m) long.
			3.	Mat Construction: Heating cable secured into conductive sheet material with "ears" to allow mounting against sides of wooden joists.
		B.	Size:
			1.	Floor heating mat size in widths of 12 inches (305 mm) and 16 inches (406 mm), and lengths 4 feet (1.2 m) through 26 feet (7.9 m); refer to Drawings.
		C.	Ratings:
			1.	Floor heating mat shall be provided in 120VAC or 240VAC per drawings and submittals.
			2.	10 watts per square foot (34 Btu/h/sqft).
	** NOTE TO SPECIFIER ** Delete if not required for project.
	2.15	ELECTRIC RADIANT FLOOR HEATING CABLE, FOR PLACEMENT IN MORTAR
		A.	Floor heating cable to have the following construction:
			1.	Heating Cable Construction: Dual heating elements that are insulated, ground system, optional outer jacket.
			2.	Power Lead Construction: Insulated current-carrying color-coded conductors, metal-braided outer jacket/ground, and minimum 10 feet (3.05 m) long.
			3.	Packaging: Cable wound onto spool or proprietary package system.
		B.	Size:
			1.	Floor heating cable size in factory set lengths of 47 feet (14.3 m) up to 940 feet (286.5 m). Cannot be cut to length on site.
		C.	Ratings:
			1.	Floor heating cable shall be provided in 120VAC or 240VAC per drawings and submittals.
			2.	Secured to floor using proprietary CableStrap, allows on-site spacing at 3 inch (76 mm) o.c. (10 watts/sq.ft.(34 Btu/h/sqft)), 2.5 inch (64 mm) o.c. (12 watts/sq.ft. (41 Btu/h/sqft)), and 2 inch (51 mm) o.c. (15 watts/sq.ft. (51 Btu/h/sqft)). Refer to Drawings.
	2.16	THERMOSTATS FOR ELECTRIC RADIANT FLOOR HEATING MATS/CABLES
		A.	Thermostats: Use thermostats provided by manufacturer.
	** NOTE TO SPECIFIER ** Delete if not required for project.
			1.	SunStat Pro digital programmable thermostat to have the following capabilities:
				a.	5/1/1 day programming.
				b.	Factory set programming with user changeability and manual override.
				c.	4 cycle times and temperatures per day.
				d.	Setback temperatures and Hold feature for energy savings.
				e.	Smart Start features.
				f.	Usage monitoring capabilities.
				g.	120V/240V dual voltage in one thermostat, 15A maximum.
				h.	Floor temperature sensing and air sensing w/floor limit control.
				i.	10K ohm, double insulated floor thermistor sensor.
				j.	On/off switch.
				k.	GFCI Class A (5mA) integral.
				l.	Master capability to drive a SunStat Relay.
				m.	Remote capability for automated home system control.
				n.	Amber back-light.
	** NOTE TO SPECIFIER ** Delete if not required for project.
			2.	SunStat digital non-programmable thermostat to have the following capabilities:
				a.	User settable temperature.
				b.	Setback temperature for energy savings.
				c.	120V/240V dual voltage in one thermostat, 15A maximum.
				d.	Floor temperature sensing and air sensing w/floor limit control.
				e.	10K ohm, double insulated floor thermistor sensor.
				f.	On/off switch.
				g.	GFCI Class A (5mA) integral.
				h.	Master capability to drive a SunStat Relay.
				i.	Remote capability for automated home system control.
				j.	Amber back-light.
	** NOTE TO SPECIFIER ** Delete if not required for project.
			3.	SunStat Dial thermostat to have the following capabilities:
				a.	User settable temperature.
				b.	120V/240V dual voltage in one thermostat, 15A maximum.
				c.	Floor temperature sensing and air sensing.
				d.	10K ohm, double insulated floor thermistor sensor.
				e.	On/off switch.
				f.	GFCI Class A (5mA) integral.
				g.	Master capability to drive a SunStat Relay.
	** NOTE TO SPECIFIER ** Delete if not required for project.
			4.	SunStat Relay - For systems that require more than 15-amp capacity, install one or more SunStat Relays to control additional loads. Relays to have the following capabilities:
				a.	120V/240V dual voltage in one control, 15A maximum.
				b.	On/off switch.
				c.	GFCI Class A (5mA) integral.
				d.	Connection to Master SunStat and other SunStat Relay(s) by low-voltage 2-conductor wire.
				e.	Up to 10 SunStat Relays controlled by single Master SunStat.
	2.17	ELECTRIC SNOW MELTING SYSTEM
		A.	Electric Snow Melting System: ProMelt electric snow melting systems including ProMelt mats and ProMelt cables.
	2.18	ELECTRIC SNOW MELTING MAT
		A.	Snow melting mat to have the following construction:
			1.	Heating Cable Construction: Dual heating elements with reinforcement and insulated, ground system, and outer jacket.
			2.	Power Lead Construction: Insulated current-carrying conductors, ground system, outer jacket; minimum 20 feet (6.1 m) long.
			3.	Mat Construction: Heating cable secured to open mesh system in pre-set spacing.
		B.	Size:
			1.	Mat size in widths of 2 feet (610 mm), 3 feet (914 mm) and lengths of 5 feet (1.5 m) through 56 feet (17.1 m). Refer to Drawings.
		C.	Ratings:
			1.	Mat shall be provided in 120VAC, 208VAC, 240VAC, or 277VAC per drawings and submittals.
			2.	38 watts per square foot (129 Btu/h/sqft) or 50 watts per square foot (171 Btu/h/sqft).
		D.	Models:
			1.	Mat shall be model series SM as supplied by Watts Radiant.
	2.19	ELECTRIC SNOW MELTING CABLE
		A.	Snow melting cable to have the following construction:
			1.	Heating Cable Construction: Dual heating elements with reinforcement and insulated, ground system, and outer jacket.
			2.	Power Lead Construction: Insulated current-carrying conductors, ground system, outer jacket; minimum 20 feet (6.1 m) long.
			3.	Packaging: Cable wound onto spool or proprietary package system.
		B.	Size:
			1.	Cable size in factory set lengths of 29 feet (8.8 m) up to 456 feet (139 m). Cannot be cut to length on site. Refer to Drawings.
		C.	Ratings:
			1.	Cable shall be provided in 120VAC, 208VAC, 240VAC, or 277VAC per drawings and submittals.
			2.	Secured using cable ties or proprietary CableStrap, allow on-site spacing at 3 inch (76 mm) o.c. (50 watts/sqft (171 Btu/h/sqft)), or 4 inch (101 mm) o.c.(38 watts/sqft (129 Btu/h/sqft)). Refer to Drawings.
		D.	Models:
			1.	Cable shall be model series SC as supplied by Watts Radiant.
	2.20	ELECTRIC SNOW MELTING SENSORS/CONTROLS
		A.	Use sensors/controls provided by system manufacturer.
			1.	ProMelt PM-2B Detector:
				a.	Automatic moisture and temperature detection.
				b.	Adjustable trigger temperature.
				c.	Pole-mounted, outdoor-rated.
				d.	Moisture sensor fixed to the detector.
				e.	120/208/240V, not 277V, maximum 30A load.
			2.	ProMelt PM-224 Detector:
				a.	Automatic moisture and temperature detection.
				b.	Adjustable trigger temperature.
				c.	Pole-mounted, outdoor-rated.
				d.	Moisture sensor fixed to the detector.
				e.	24V (Operates in conjunction with the ContactorPro).
			3.	ProMelt PM-824 Detector:
				a.	Automatic moisture and temperature detection.
				b.	Adjustable trigger temperature.
				c.	Pole-mounted, outdoor-rated.
				d.	Moisture sensor connected to the detector by a 10 ft cable.
				e.	24V (Operates in conjunction with the ContactorPro).
			4.	ProMelt PM-DP Display Panel:
				a.	Remote monitor for the ProMelt PM-2B detector.
				b.	Manual On, Automatic, and Standby operations.
				c.	24V (supplied by PM-2B).
			5.	ProMelt PM-HSC5 Slab Detector:
				a.	Automatic moisture and temperature detection.
				b.	Slab-mounted.
				c.	24V (Operates in conjunction with the ContactorPro).
			6.	ProMelt CP-50 ContactorPro Panel:
				a.	Turn-key contactor panel.
				b.	Operates in conjunction with the ProMelt PM-224, PM-824, or PM-HSC5 detectors.
				c.	Manual On with timer or Automatic operation.
				d.	NEMA Type 1 for indoor mounting.
				e.	120/208/240/277V with one (1) 50A contactor.
			7.	ProMelt CP-100 ContactorPro Panel:
				a.	Turn-key contactor panel.
				b.	Operates in conjunction with the ProMelt PM-224, PM-824, or PM-HSC5 detectors.
				c.	Manual On with timer or Automatic operation.
				d.	NEMA Type 1 for indoor mounting.
				e.	120/208/240/277V with two (2) 50A contactors.
			8.	ProMelt CP-200 ContactorPro Panel:
				a.	Turn-key contactor panel.
				b.	Operates in conjunction with the ProMelt PM-224, PM-824, or PM-HSC5 detectors.
				c.	Manual On with timer or Automatic operation.
				d.	NEMA Type 1 for indoor mounting.
				e.	120/208/240/277V with four (4) 50A contactors.
			9.	ProMelt CP-200EX ContactorPro Extension Panel:
				a.	Turn-key contactor panel.
				b.	Operates in conjunction with the ProMelt PM-50, PM-100, or PM-200 panels.
				c.	NEMA Type 1 for indoor mounting.
				d.	120/208/240/277V with four (4) 50A contactors.
	2.21	ELECTRIC FLOOR HEATING AND SNOW MELTING ACCESSORY COMPONENTS
		A.	Monitoring Device: Use device called LoudMouth provided by manufacturer. It is battery powered and connects to all three power lead wires of mats/cable to monitor installation. Provides both visual (red LED) and audio (loud beep) alarms if heating mats/cables are damaged.
		B.	CableTrowel: For system compatibility, use manufacturer’s plastic CableTrowel to help prevent cutting of the heating mat/cable during thin-set mortar installation.
		C.	CableStrap: For system compatibility in floor heating cable installations, use manufacturer’s CableStrap. CableStrap to allow different cable spacings:
			1.	Electric Floor Heating System: 3 inch (76 mm) o.c. (10 watts/sqft), 2.5 (64 mm) o.c. (12 watts/sqft), and 2 inch (51 mm) o.c. (15 watts/sqft).
			2.	Electric Snow Melting System: 3 inch (76 mm) o.c. (50 watts/sqft) or 4 inch (101 mm) o.c. (38 watts/sqft).
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Site Verification of Conditions:
			1.	Verify that site conditions are acceptable for installation of the system. Refer to manufacturer's installation manual for information.
			2.	Do not proceed with installation of the system until unacceptable conditions are corrected.
	** NOTE TO SPECIFIER ** Coordinate article below with manufacturer's recommended installation requirements.
	3.2	INSTALLATION OF HYDRONIC FLOOR HEATING SYSTEMS
		A.	Comply with manufacturer's product data, including product technical bulletins, installation instructions and design drawings, including the following:
			1.	Installation manuals.
			2.	Design software engineering and analysis.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for slab-on-grade installation. Delete this article if this type of installation is not utilized.
		B.	Slab-On-Grade Installation:
			1.	Fasten the tubing to the flat mesh or reinforcing bar in accordance with the tubing manufacturer's installation recommendations.
			2.	Use closer tubing on-center distances along exterior walls. Increase tubing on-center distances as the installation moves away from the exterior wall as determined by manufacturer analysis.
	** NOTE TO SPECIFIER ** If the design requires under-slab insulation, the structural engineer determines the vertical compressive strength of the high-density extruded board insulation. The radiant floor design determines the required insulation resistance value (R-value). DO NOT use foil-faced insulation. Delete if not required.
			3.	Staple the tubing to the insulation board.
			4.	Install edge insulation where the heated panel directly contacts an exterior wall or panel.
			5.	Install tubing at a consistent depth below the surface elevation. Ensure sufficient clearance to avoid control joint saw cutting.
	** NOTE TO SPECIFIER ** Depending on the manufacturer's and structural engineer's recommendation, fibrous expansion joints may tolerate penetration.
			6.	Where tubing crosses metal expansion joints in the concrete, ensure the tubing passes below the joints or is sleeved through the joint.
			7.	For PEX tubing that exits the slab in a 90-degree bend, use fabricated bend supports.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for pre-cast plank construction with a cap pour. Delete this article if this type of installation is not utilized.
		C.	Pre-Cast Plank Construction with a Cap Pour:
			1.	Fasten the tubing to flat mesh or reinforcing bar, or snap into Triple-track RailWays or Single-track RailWays in accordance with the tubing manufacturer's installation recommendations.
			2.	Use closer tubing on-center distances along exterior walls. Increase tubing on-center distances as the installation moves away from the exterior wall.
	** NOTE TO SPECIFIER ** If the design requires under-slab insulation, the structural engineer determines the vertical compressive strength of the high-density extruded board insulation. The radiant floor design determines the required insulation resistance value (R-value). DO NOT use foil-faced insulation. Delete if not required.
			3.	Staple the tubing to the insulation board.
			4.	Install edge insulation where the heated panel directly contacts an exterior wall or panel.
			5.	Install tubing at a consistent depth below the surface elevation. Ensure sufficient clearance to avoid control joint saw cutting.
	** NOTE TO SPECIFIER ** Depending on the manufacturer's and structural engineer's recommendation, fibrous expansion joints may tolerate penetration.
			6.	Where tubing crosses metal expansion joints in the concrete, ensure the tubing passes below the joints or is sleeved through the joint.
			7.	For PEX tubing that exits the slab in a 90-degree bend, use fabricated bend supports.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for wood floor construction with a lightweight gypsum pour underlayment. Delete this article if this type of installation is not utilized.
		D.	Wood Floor Construction with a Lightweight Gypsum Topping:
			1.	Staple tubing to the wood sub-floor in accordance with the tubing manufacturer's installation recommendations. The attachment method shall not cause abrasions on the tubing.
			2.	Use closer tubing on-center distances along exterior walls. Increase tubing on-center distances as the installation moves away from the exterior wall.
			3.	Ensure the depth of the lightweight pour is a minimum of 3/4 inch (19 mm) over the outside dimension of the tubing, 1 inch typical overall thin-slab thickness.
	** NOTE TO SPECIFIER ** Delete if not required.
			4.	Install reinforcing mesh within the pour for finished flooring of tile or linoleum.
	** NOTE TO SPECIFIER ** Delete if not required.
			5.	Install wood sleepers along the room perimeter and between the tubing to provide a nailing surface for finished wood floors or carpet tack strips as required. Refer to Section 06100.
	** NOTE TO SPECIFIER ** Use lightweight gypsum concrete material for radiant floor heating applications meeting radiant floor manufacturer's requirements.
			6.	Allow lightweight gypsum concrete pour to cure in accordance with the applicator's instructions. Once cured, seal the surface of the floor topping to protect surface from moisture.
	** NOTE TO SPECIFIER ** Delete if not required.
			7.	Install insulation in the joist cavity below the floor in accordance with the submitted radiant floor design. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Delete if not required.
			8.	Install edge insulation if the heated panel directly contacts an exterior wall or panel. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for wood floor construction with Onix tubing stapled under the wood sub-floor. Delete this article if this type of installation is not utilized.
		E.	Wood Floor Construction with UnderFloor Heating (Onix tubing attached directly to wood sub-floor):
			1.	Install tubing attached directly to the underside of the wood sub-floor in accordance with the tubing manufacturer's recommendations. The attachment method shall not puncture or cause abrasions to the tubing.
			2.	Do not exceed 8 inches (203 mm) on center tube spacing. Refer to the submitted radiant floor design.
			3.	Comply with the tubing manufacturer's installation procedures on proper joist drilling.
			4.	Install foil-faced insulation in the lower portion of the joist cavity. Allow an air gap of 2 to 3 inches (51 to 76 mm) between the wood sub-floor and the top of the insulation. Refer to Section 07210.
			5.	Use the recommended amount of insulation in the joist cavity below the floor in accordance with the submitted radiant floor design. Refer to Section 07210.
			6.	Use edge insulation equal to the amount of underfloor insulation if the heated panel directly contacts an exterior wall or panel. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for wood floor construction with tubing suspended in the joist bay. Delete this article if this type of installation is not utilized.
		F.	Wood Floor Construction with Joist Heating (tubing suspended in the joist bay):
			1.	Install tubing within the joist cavity in accordance with the tubing manufacturer's recommendations. The attachment method shall not cause abrasions to the tubing.
			2.	Do not exceed 8 inches (203 mm) on center. Refer to the submitted radiant floor design.
			3.	Do not allow PEX tubing within the joist cavity to contact the wood sub-floor.
			4.	Refer to the tubing manufacturer's installation procedures on proper joist drilling.
			5.	Install foil-faced insulation in the lower portion of the joist cavity. Allow an air gap of 2 to 3 inches (51 to 76 mm) between the wood sub-floor and the top of the insulation. Refer to Section 07210.
			6.	Use the recommended amount of insulation in the joist cavity below the floor in accordance with the submitted radiant floor design. Refer to Section 07210.
			7.	Use edge insulation equal to the amount of underfloor insulation if the heated panel directly contacts an exterior wall or panel. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for wood floor construction with Extruded Aluminum PEX Plates. Delete this article if this type of installation is not utilized.
		G.	Wood Floor Construction with Extruded Aluminum PEX Plates:
			1.	Attach the Extruded Aluminum PEX Plates to the wood sub-floor in the joist cavity according to the tubing manufacturer's recommendations.
			2.	Do not exceed 8 inches (203 mm) on center. Refer to the submitted radiant floor design.
			3.	Secure the tubing into the Extruded Aluminum PEX Plate.
			4.	Refer to the PEX tubing manufacturer's procedures for proper joist drilling.
			5.	Install foil-faced insulation in the lower portion of the joist cavity. Allow an air gap of 2 to 3 inches (51 to 76 mm) between the wood sub-floor and the top of the insulation. Refer to Section 07210.
			6.	Use the recommended amount of insulation in the joist cavity below the floor in accordance with the submitted radiant floor design. Refer to Section 07210.
			7.	Use edge insulation equal to the amount of underfloor insulation if the heated panel directly contacts an exterior wall or panel. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for wood floor construction with Stamped Aluminum PEX Plates. Delete this article if this type of installation is not utilized.
		H.	Wood Floor Construction using Stamped Aluminum PEX Plates:
			1.	Attach the Stamped Aluminum PEX Plates to the wood sub-floor in the joist cavity according to the PEX tubing manufacturer's recommendations. Secure only one side of the plate to the wood sub-floor.
			2.	Do not exceed 8 inches (203 mm) on center. Refer to the submitted radiant floor design.
			3.	Pull the tubing through the joist cavity. Install the tubing into the plate.
			4.	Comply with the PEX tubing manufacturer's installation procedures for proper joist drilling.
			5.	Install foil-faced insulation in the lower portion of the joist cavity. Allow an air gap of 2 to 3 inches (51 to 76mm) between the wood sub-floor and the top of the insulation. Refer to Section 07210.
			6.	Use the recommended amount of insulation in the joist cavity below the floor in accordance with the submitted radiant floor design. Refer to Section 07210.
			7.	Use edge insulation equal to the amount of underfloor insulation if the heated panel directly contacts an exterior wall or panel. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for wood floor construction with SubRay. Delete this article if this type of installation is not utilized.
		I.	Wood Floor Construction with SubRay:
			1.	Install SubRay on top of the wood sub-floor according to the PEX tubing manufacturer's instructions.
			2.	Coordinate the finished floor covering layout direction with the direction of the SubRay layout. Comply with the tubing manufacturer's instructions.
			3.	Install insulation in the joist cavity below the floor according to the submitted radiant floor design. Install the insulation tight against the wood sub-floor. Refer to Section 07210.
			4.	Use the recommended amount of insulation in the joist cavity below the floor in accordance with the submitted radiant floor design. Refer to Section 07210.
			5.	Use edge insulation equal to the amount of underfloor insulation if the heated panel directly contacts an exterior wall or panel. Refer to Section 07210.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for use of glycol and water solution in the system. Delete this article if glycol and water solution is not utilized.
		J.	Glycol and Water Solution:
			1.	Provide premixed glycol and water solutions.
			2.	Do not use ethylene glycol due to toxicity issues. Provide inhibited propylene glycol for hydronic radiant floor heating systems. Refer to the boiler manufacturer's recommendations.
	3.3	INSTALLATION OF HYDRONIC SNOW MELTING SYSTEM
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for slab-on-grade installation. Delete this article if this type installation is not utilized.
		A.	Slab-On-Grade Installation:
			1.	Fasten the tubing to the rewire or rebar in accordance with the tubing manufacturer's installation recommendations.
			2.	Install tubing at a consistent depth below the surface elevation. Ensure sufficient clearance to avoid control joint saw cutting.
			3.	Install an extruded polystyrene insulation board at the edge of, and optionally under, the slab, depending on site conditions.
			4.	Where tubing crosses metal expansion joints in the concrete, ensure that the tubing passes below the joints or is sleeved through the joints in accordance with manufacturer's instructions.
			5.	For PEX that exits the slab in a 90-degree bend, use fabricated bend supports.
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for slab over steel deck installation. Delete this article if this type installation is not utilized.
		B.	Slab over Steel Deck Installation:
			1.	Fasten tubing to either rewire or rebar, or snap tubing into Triple or Single-track RailWays in accordance with manufacturer's installation instructions.
			2.	If rewire or rebar is not used, install the tubing perpendicular to the ribbing on the steel deck.
			3.	Install either spray-on insulation or insulation board under the steel deck as per the manufacturer's directions.
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for brick pavers over concrete slab installation. Delete this article if this type installation is not utilized.
		C.	Brick Pavers over Concrete Slab Installation:
			1.	Fasten the tubing to the rewire or rebar in accordance with the tubing manufacturer's installation recommendations.
			2.	Install tubing at a consistent depth below the surface elevation.
			3.	Install the brick pavers on top of the concrete according to proper masonry practice and guidelines for this application.
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for brick pavers over sand or stone dust installation. Delete this article if this type installation is not utilized.
		D.	Brick Pavers over Sand or Stone Dust Installation:
			1.	Fasten the tubing to the rewire or rebar in accordance with the tubing manufacturer's recommendations for installation in base material.
			2.	Install tubing at a consistent depth below the surface elevation.
			3.	Place a layer of sand over the tubing to a depth that results in the manufacturer's recommended minimum depth when compacted.
			4.	Install the brick pavers on the compacted material according to proper masonry practice and guidelines for this application.
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for asphalt installation. Delete this article if this type installation is not utilized.
		E.	Asphalt Installation:
			1.	Fasten the tubing to the rewire or rebar in accordance with the tubing manufacturer's recommendations for installation in sub-base material.
			2.	Install tubing at a consistent depth below the surface elevation.
			3.	Ensure that there is a minimum of 2 inches (51 mm) of material covering the installed tubing.
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice. Article lists requirements for use of glycol and water solution in the system. Delete this article if glycol and water solution is not utilized.
		F.	Glycol and Water Solution
			1.	Provide premixed glycol and water solutions.
			2.	Do not use ethylene glycol due to toxicity issues. Provide inhibited propylene glycol for hydronic radiant heating systems. Refer to the boiler manufacturer's recommendations.
	3.4	INSTALLATION OF PRE-INSULATED PIPING SYSTEM
		A.	Comply with manufacturer's product data, including product technical bulletins, installation instructions and design drawings, including:
			1.	Watts Radiant R-flex Installation Manual.
		B.	Below-grade Installation:
			1.	Pre-insulated piping shall be installed in accordance with manufacturer's recommendations and the details as shown on the contract drawings.
			2.	The system will be installed with the fewest number of underground joints as possible.
			3.	The system does not require expansion loops, expansion joints or compensators of any type.
			4.	An end cap shall be applied at all terminations of the pre-insulated piping system, including all fitting locations, to form a watertight seal.
			5.	All buried fittings will be installed, insulated and sealed in accordance with the piping manufacturer's instructions.
			6.	Protective Inspection Chamber or Protective Casings are required for all below-grade connections.
		C.	Backfill:
			1.	The pre-insulated piping will be backfilled with clean sand material.
				a.	R-flex should always be installed below the frost line.
				b.	Minimum vertical distance from the bottom of the piping to the trench floor is 4 inches (100 mm).
				c.	Minimum lateral distance from the side of the piping to the trench wall is 6 inches (150 mm) for 4.9 inch (125 mm) outer jacket; 7.1 inches (180 mm) for 6.3 inch (160 mm) or 7.9 inch (200 mm) outer jacket.
				d.	Install a minimum of 6 inches (300 mm) of clean fill over the top of the pre-insulated piping.
				e.	Minimum depth of backfill over the sand is 9.9 inches (250 mm) for pedestrian traffic or 25.6 inches (650 mm) for vehicular traffic.
				f.	The balance of the trench can be backfilled with native soil void of stone greater than 2 inches (51 mm) in diameter.
				g.	Caution tape shall be installed in the backfill along the entire length of the trench.
	3.5	INSTALLATION OF ELECTRIC FLOOR HEATING SYSTEMS
		A.	Comply with manufacturer's product data, including product technical bulletins, installation instructions and design drawings.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice.
		B.	Electric radiant floor heating mat, for placement in mortar
			1.	Perform electrical resistance test to verify product integrity before beginning work.
			2.	Secure LoudMouth monitor device to mat power leads as specified by LoudMouth instructions.
			3.	Test-fit the mat in the area specified. Mat heating cable cannot be cut to fit.
			4.	Secure the mat mesh to the surface of the floor.
			5.	Perform electrical resistance test to verify product integrity again.
			6.	Secure thermostat floor sensor into mat area.
			7.	Bring electrical power source to thermostat location.
			8.	Pull mat power leads into thermostat electrical box.
			9.	Photograph installation for records.
			10.	Apply cement-based, polymer-modified mortar over floor heating mat and finish floor surfaces as specified.
			11.	Perform electrical resistance test to verify product integrity again.
			12.	Connect thermostat to mat power leads, floor sensor, and power source. Test system briefly and shut down.
			13.	Do not place system into full operation until floor mortars are fully cured per mortar manufacturer specifications.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice.
		C.	Electric radiant floor heating mat, for suspension below wood subfloor.
			1.	Perform electrical resistance test to verify product integrity before beginning work.
			2.	Secure LoudMouth monitor device to mat power leads as specified by LoudMouth instructions.
			3.	Test-fit the mat in the area specified. Mat cannot be cut to fit and must be laid flat.
			4.	Secure thermostat floor sensor into mat area, either in floor surface or on bottom side of subfloor.
			5.	Secure the mat mesh to the sides of the floor joists at 2 inches (51 mm) below the subfloor.
			6.	Insulate under mat per manufacturer's recommendations.
			7.	Bring mat power leads to an accessible junction box below the subfloor.
			8.	Perform electrical resistance test to verify product integrity again.
			9.	Bring electrical power source to thermostat location and pull wire from thermostat location to junction box and make connections to mat power leads.
			10.	Photograph installation for records.
			11.	Secure minimum R-13 to R-19 insulation below the mats and in surrounding joist areas as specified to force heat upward into floor surface.
			12.	Perform electrical resistance test to verify product integrity again.
			13.	Connect thermostat to wiring, floor sensor, and power source. Test system briefly and shut down.
			14.	If floor coverings are fresh, do not place system into full operation until floor mortars are fully cured per mortar manufacturer specifications.
	** NOTE TO SPECIFIER ** Retain, edit or delete paragraph below to suit project requirements and specifier practice.
		D.	Electric radiant floor heating cable, for placement in mortar.
			1.	Perform electrical resistance test to verify product integrity before beginning work.
			2.	Secure LoudMouth monitor device to heating cable power leads as specified by LoudMouth instructions.
			3.	Verify measurements of area specified are correct per cable size. Cable cannot be cut to length to fit.
			4.	Secure the cable to the surface of the floor using CableStrap product, using spacing per specifications.
			5.	Perform electrical resistance test to verify product integrity again.
			6.	Secure thermostat floor sensor into heating cable area.
			7.	Bring electrical power source to thermostat location.
			8.	Pull heating cable power leads into thermostat electrical box.
			9.	Photograph installation for records.
			10.	Apply cement-based, polymer-modified mortar over floor heating cable and finish floor surfaces as specified.
			11.	Perform electrical resistance test to verify product integrity again.
			12.	Connect thermostat to heating cable power leads, floor sensor, and power source. Test system briefly and shut down.
			13.	Do not place system into full operation until floor mortars are fully cured per mortar manufacturer specifications.
	3.6	INSTALLATION OF ELECTRIC SNOW MELTING SYSTEM
		A.	Comply with manufacturer's product data, including product technical bulletins, installation instructions and design drawings.
	**NOTE TO SPECIFIER** Retain, edit or delete paragraph below to suit project requirements and specifier practice.
		B.	Electric Snow Melting Mat:
			1.	Test the resistance and insulation integrity of the mat and record.
			2.	Verify that the site is ready to receive the mat, including all base substrate preparation.
			3.	Prepare electrical per drawings and bring electrical conduit to the site for the power leads and slab sensor (if used).
			4.	Test-fit the mat in the area specified. Mat heating cable cannot be cut shorter to fit.
			5.	Secure the mat to the substrate or reinforcement material as required.
			6.	Secure the slab sensor (if used).
			7.	Test the resistance and insulation integrity of the mat and record.
			8.	Pull mat power leads into electrical conduit.
			9.	Photograph installation for records.
			10.	Install coverings of concrete; asphalt (maximum 285°F); sand/stone dust and pavers; or mortar and tile. Minimum 1 to 1-1/2 inch thick covering.
			11.	Install marker plate identifying snow melting product in the area.
			12.	Test the resistance and insulation integrity of the mat and record.
			13.	Make electrical connections to snow melting mat, sensors/controls, and power source. Test system briefly and shut down.
		C.	Electric Snow Melting Cable:
			1.	Test the resistance and insulation integrity of the cable and record.
			2.	Verify that the site is ready to receive the cable, including all base substrate preparation.
			3.	Prepare electrical per drawings and bring electrical conduit to the site for the power leads and slab sensor (if used).
			4.	Verify measurements of area specified are correct per cable size. Cable cannot be cut shorter to fit.
			5.	Secure the cable to the substrate (using CableStrap) or reinforcement material (using plastic cable ties) as required.
			6.	Secure the slab sensor (if used).
			7.	Test the resistance and insulation integrity of the cable and record.
			8.	Pull cable power leads into electrical outlet.
			9.	Photograph installation for records.
			10.	Install coverings of concrete; asphalt (maximum 285°F); sand/stone dust and pavers; or mortar and tile. Minimum 1 to 1-1/2 inch thick covering.
			11.	Install marker plate identifying snow melting product in the area.
			12.	Test the resistance and insulation integrity of the cable and record.
			13.	Make electrical connections to snow melting mat, sensors/controls, and power source. Test system briefly and shut down.
	3.7	FIELD QUALITY CONTROL AND TESTING
		A.	Hydronic System:
			1.	Site Tests:
				a.	To ensure system integrity, pressure test the system before covering tubing in concrete or when other trades are working in the vicinity of the tubing.
					1)	Test all electrical controls in accordance with respective installation manuals.
					2)	System shall be checked after three years of operation and every year thereafter. System shall be checked for pH levels to ensure that it is operating within suggested guidelines.
		B.	Pre-insulated PEX Distribution System:
			1.	Site tests:
				a.	To ensure system integrity, pressure-test the system before and during backfilling or when other trades are working near the piping.
				b.	The service tubing will be water-tested at 1-1/2 times the operating pressure for a minimum of 3 hours prior to system burial.
		C.	Electric Floor Heating or Snow Melting System:
			1.	To ensure system integrity, do not damage the system or cut heating cable for any reason. Cover heating mat/cable against site damage if there is a delay between product installation and floor covering installation.
			2.	Perform electrical resistance measurements and record in the mat/cable installation manual as required before, during, and after product installation.
			3.	If Loudmouth monitor device is used, secure before installation begins and remove only after final coverings are finished including grout application.
			4.	Test system briefly after installation for function and integrity but do not place system into full operation until mortars or other coverings as applicable are fully cured per manufacturer specifications.
			5.	Keep records of system products, test results, and photographs for inspection.
	** NOTE TO SPECIFIER ** Specify the final actions required to prepare installed equipment or other completed work to properly function or perform.
	3.8	HYDRONIC SYSTEM ADJUSTING
	** NOTE TO SPECIFIER ** Balancing is unnecessary when all loop lengths across the manifold are within 10 percent of each other in length. Install the supply and return piping to the manifold in a reverse-return configuration to ensure self-balancing. Delete if not required.
		A.	Balancing Across the Manifold: Balance all loops across each manifold for equal flow resistance based on actual loop lengths and total manifold flow.
		B.	Balancing between manifolds is accomplished with a flow control device installed on the return piping leg from each manifold when direct return piping is used for the supply and return mains or the circuits deviate by more than 10 percent.
	** NOTE TO SPECIFIER ** Specify the final actions required to clean installed equipment or other completed work to properly function or perform. Coordinate article below with Division 1 Execution Requirements (Cleaning) Section.
	3.9	CLEANING
		A.	Remove temporary coverings and protection of adjacent work areas.
		B.	Repair or replace damaged installed products.
		C.	Clean installed products in accordance with manufacturer's instructions prior to Owner's acceptance.
		D.	Remove construction debris from project site and legally dispose of debris.
	** NOTE TO SPECIFIER ** Specify requirements of the installer or manufacturer to demonstrate or train the Owner or Owner's personnel in the operation and maintenance of equipment.
	3.10	DEMONSTRATION
		A.	Hydronic Radiant Floor Heating System:
			1.	Demonstrate operation of system to Owner or Owner's personnel.
	** NOTE TO SPECIFIER ** The Owner monitors the solution effectiveness through an established maintenance program as outlined by the glycol manufacturer. Delete if glycol solution not required.
			2.	Instruct the Owner or Owner's personnel about the type, concentration and maintenance of the glycol and water solution.
			3.	Provide Owner or Owner's personnel with manufacturer's installation, operation, and maintenance instructions for installed components within the system.
		B.	Pre-insulated Piping System
			1.	Demonstrate operation of system to Owner or Owner's personnel.
			2.	Instruct Owner or Owner's personnel about operation and maintenance of the installed system.
			3.	Provide Owner or Owner's personnel with manufacturer's installation, operation, and maintenance instructions for installed components within the system.
		C.	Electric Radiant Floor Heating System:
			1.	Demonstrate operation of system to Owner or Owner's personnel.
			2.	Advise Owner or Owner's personnel about the required cure time for mortar or other covering as applicable before putting system into full operation.
			3.	Provide Owner or Owner's personnel with manufacturer's installation, operation, and maintenance instructions for installed components within the system.
		D.	Electric Snow Melting System:
			1.	Demonstrate operation of snow melting system to Owner or Owner's personnel.
			2.	Advise the Owner or Owner's representative about the required cure time for mortar or other covering as applicable before putting system into full operation.
			3.	Provide Owner or Owner's personnel with manufacturer's installation, operation, and maintenance instructions for installed components within the system.
	** NOTE TO SPECIFIER ** Specify provisions for protecting work after installation but prior to acceptance by the Owner. Coordinate article below with Division 1 Execution Requirements Section.
	3.11	PROTECTION
		A.	Protect installed work from damage caused by subsequent construction activity on the site.
		B.	Provide owner with copy of photos and drawings of product locations to assist.
	END OF SECTION