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SECTION 23 83 16
RADIANT HEATING AND COOLING SYSTEM
 
 
Copyright 2014 - 2015 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Uponor ; plumbing piping, hydronic distribution, radiant heating and cooling.
.
This section is based on the products of Uponor , which is located at:
5925 148th St. W.
Apple Valley, MN 55124
Toll Free Tel: 800-321-4739
Tel: 952-891-2000
Fax: 952-891-2008
Email: request info (daniel.worm@uponor.com)
Web: www.uponorengineering.com | www.uponorengineering.com
[ Click Here ] for additional information.
With over 40 years of performance in structures around the globe, Uponor is the professional's choice for commercial plumbing, hydronic distribution and radiant heating and cooling systems. Using technologies proven in the most demanding environments, Uponor has perfected the art of providing systems that exceed expectations and deliver consistent quality for decades of use.
Get Uponor product data, in the right formats, in the places, to quickly and accurately design and estimate your PEX-a plumbing, radiant heating/cooling and hydronic distribution piping project. 2D/3D CAD files and BIM files in multiple platforms are available at www.uponorpro.com/catalog.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete system types not required.
 
A.
Radiant heating system.
B.
Radiant cooling system.
C.
Radiant heating and cooling system.
D.
Manufacturer-supported system startup and commissioning phase support.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required
 
A.
Section 22 11 13 - Facility Water Distribution Piping.
B.
Section 23 21 13 - Hydronic Piping.
1.3
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
ASTM International (ASTM):
1.
ASTM D 6394 - Standard Specification for Sulfone Plastics.
2.
ASTM E 119 - Standard Test Methods for Fire Tests of Building Construction and Materials.
3.
ASTM F 876 - Standard Specification for Crosslinked Polyethylene (PEX) Tubing.
4.
ASTM F 877 - Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems.
5.
ASTM F 1960 - Standard Specification for Cold Expansion Fittings with PEX Reinforcing Rings for Use with Crosslinked Polyethylene (PEX) Tubing.
1.4
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.
Product Data: Provide manufacturer's product submittal data, including pressure and temperature rating, oxygen-barrier performance, and fire-performance characteristics.
C.
Shop Drawings: Submit the following piping layouts, calculations and reports.
1.
Piping layout scale: 1/8 inch = 1 foot.
2.
Submit manufacturer's detailed drawings showing layouts, fixing details and piping details of all areas where hydronic radiant systems are indicated. Submit a cross-referenced manifold schedule indicating loop lengths, tubing diameter, flow rate, operating water temperatures, and pressure drop to meet the required performance listed on the contract documents along with product and performance data for each component.
3.
Indicate all valves, pumps and items of equipment that are required to control and operate the hydronic radiant system as shown on the plans and described in the sequence of operations. Submit a valve and pump schedule listing each number, type, size, model and service. Cross reference to supporting product data.
4.
Provide calculations that support the heating and cooling performance requirements of the hydronic radiant system. These calculations shall indicate the slab construction and the depth of the tubing in relation to the exposed surface. Calculations must show the required flow rate, operating temperatures and pressure drops through the system.
5.
Submit manifold details, including all connections, fittings, valves and mounting requirements.
6.
Submit details for embedded tubing through concrete expansion joints.
7.
Provide drawings showing piping manifold locations and installation details.
8.
Provide control sequences and requirements for control hardware devices. Indicate compliance and coordination with requirements of other specification sections.
9.
Provide piping sample with complete print stream indicating certification of properties.
D.
Operation and Maintenance Data: Provide operation and maintenance manuals for valves, manifolds, and controls.
E.
Closeout Documentation:
1.
Submit manufacturer's report detailing that the hydronic radiant system has been installed in accordance with the contract documents and the manufacturer's specified instructions. Provide manufacturer's instructions. Note any exceptions.
2.
Submit start-up report demonstrating that system meets required capacity, is fully functional and commissioned to the satisfaction of system manufacturer.
3.
Provide final as-built drawings indicating tubing layout, manifold locations, zoning and manifold schedules with details required for installation of the system.
4.
Provide documentation indicating that the installer is trained to install the manufacturer's products.
5.
Warranty documents specified herein
1.5
QUALITY ASSURANCE
A.
Installer Qualifications: Installer shall have demonstrated experience on projects of similar size and complexity with documentation proving successful completion of hydronic radiant system installation and/or training by the PEX tubing manufacturer.
B.
Hydronic radiant system manufacturer shall have successfully completed five installations of similar type and scope. Manufacturer shall provide a representative for field support during the installation and commissioning of the hydronic radiant system.
C.
Pre-installation Meetings:
1.
Verify project requirements, substrate conditions, floor coverings, manufacturer's installation instructions and warranty requirements.
2.
Review project construction timeline to ensure compliance or discuss modifications as required.
3.
Interface with other trade representatives to verify areas of responsibility.
4.
Establish the frequency and construction phase the project engineer intends for site visits and inspections by the PEX tubing manufacturer's representative
1.6
DELIVERY, STORAGE, AND HANDLING
A.
General: Comply with Division 1 Product Requirements Section.
B.
Ordering: Comply with manufacturer's ordering instructions and lead-time requirements to avoid construction delays.
C.
Delivery: Deliver materials in manufacturer's original, unopened, undamaged containers with identification labels intact.
D.
Storage and Protection: Store materials protected from exposure to harmful environmental conditions and at temperature and humidity conditions recommended by the manufacturer.
1.
Store PEX tubing in cartons or under cover to avoid dirt or foreign material from entering the tubing.
2.
Do not expose PEX tubing to direct sunlight for more than 30 days. If construction delays are encountered, cover the tubing to prevent exposure to direct sunlight
1.7
WARRANTY
A.
Project Warranty: Refer to Conditions of the Contract for project warranty provisions.
B.
Manufacturer's Warranty: 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.
Warranty may transfer to subsequent owners.
2.
Warranty Period for PEX Tubing: 30-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of installation.
3.
Warranty Period for Manifolds and Fittings: 5-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of installation.
4.
Warranty Period for Radiant Rollout Mat: 25-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of installation for tubing. 10-year, non-prorated warranty against failure due to defect in material or workmanship, beginning with date of installation for in-slab engineered polymer fittings
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Uponor , which is located at: 5925 148th St. W.; Apple Valley, MN 55124; Toll Free Tel: 800-321-4739; Tel: 952-891-2000; Fax: 952-891-2008; Email: request info (daniel.worm@uponor.com); Web: www.uponorengineering.com | www.uponorengineering.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 01 60 00 - Product Requirements.
2.2
CROSSLINKED POLYETHYLENE (PEX) PIPE AND FITTINGS
A.
To ensure system compatibility consistency, all products, manifolds, components, etc. specified herein shall be manufactured by and/or available from the PEX tubing manufacturer.
B.
Tubing:
1.
Material: Engel-method crosslinked polyethylene (PEX-a)
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).
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).
4.
Show compliance with ASTM E119 and ANSI/UL 263 through certification listings through UL.
a.
UL Design No. L557 1 hour wood frame floor/ceiling assemblies.
b.
UL Design No. K913 2 hour concrete floor/ceiling assemblies.
c.
UL Design No. U372 1 hour wood stud/gypsum wallboard wall assemblies.
d.
UL Design No. V444 1 hour steel stud/gypsum wallboard wall assemblies.
5.
Minimum Bend Radius (Cold Bending): Six times the outside diameter.
6.
Barrier Tubing Type: Wirsbo hePEX or equal
a.
Tubing shall have 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.
b.
Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated in the system design.
C.
Fittings:
1.
ASTM F1960 cold-expansion fitting manufactured from the following material types:
a.
UNS No. C69300 Lead-free (LF) Brass.
b.
20% glass-filled polysulfone as specified in ASTM D6394.
c.
Unreinforced polysulfone (group 01, class 1, grade 2) as specified in ASTM D6394.
d.
Polyphenylsulfone (group 03, class 1, grade 2) as specified in ASTM D6394.
e.
Blend of polyphenylsulfone (55-80%) and unreinforced polysulfone (rem.) as specified in ASTM D6394.
f.
Reinforcing cold-expansion rings shall be manufactured from the same source as PEX-a piping manufacturer and marked F1960.
 
** NOTE TO SPECIFIER ** Do not specify engineered polymer (EP) polyphenylsulfone fittings for systems that contain ethylene glycol. Do not specify metallic fittings for installations embedded in concrete.
 
2.3
DISTRIBUTION MANIFOLDS
A.
Brass Manifolds:
1.
Brass manifolds assemblies shall be constructed of dezincification-resistant brass, with minimum 1 inch (25 mm) barrel, sized for flow rates required on submitted manifold schedule, and R32 union connections.
2.
Manifold assemblies shall be furnished and installed with:
a.
Supply and return filter ball valves.
b.
Supply and return temperature gauges.
c.
Loop balancing and isolation valves.
d.
End cap with vent and drain.
e.
Mounting bracket.
f.
Manual balancing valves with visual flow indicators.
g.
ASTM F1960 fitting assemblies.
 
** NOTE TO SPECIFIER ** Only specify loop actuators if individual loop control is required.
 
h.
Individual loop actuators with adapter rings, as needed.
3.
Install flow setter on the return leg from the manifold to provide flow balancing between manifolds.
4.
Manifolds support 5/16 inch (8 mm) through 3/4 inch (19 mm) PEX tubing.
5.
Each manifold location shall have the ability to vent air manually from the system.
6.
Use appropriately sized manifolds cabinets to allow the manifold assemblies to be mounted inside the wall cavity. Provide manifold elbows and offsets, as required.
B.
Stainless Steel Manifolds:
1.
Stainless Steel manifold assemblies shall be constructed of stainless-steel, with minimum 1 inch (25 mm) barrel or 1-1/4 inches barrel, sized for flow rates required on submitted manifold schedule and R32 union connections.
2.
Manifold assemblies shall be furnished and installed with:
a.
Supply and return ball valves with temperature gauges.
b.
Loop balancing and isolation valves.
c.
Supply and return vent and drain connections.
d.
Mounting bracket.
e.
Manual balancing valves with visual flow indicators 1.5 gpm (5.7 Lpm) for 1 inch (25 mm) barrel manifolds and 2 gpm (7.6 Lpm) for 1-1/4 inches (32 mm) barrel manifolds.
f.
ASTM F1960 fitting assemblies.
 
** NOTE TO SPECIFIER ** Only specify loop actuators if individual loop control is required.
 
g.
Individual loop actuators with adapter rings, as needed.
3.
Install flow setter on the return leg from the manifold to provide flow balancing between manifolds.
4.
Manifolds support 5/16 inch (8 mm) through 3/4 inch (19 mm) PEX tubing.
5.
Each manifold location shall have the ability to vent air manually from the system.
6.
Use appropriately-sized manifolds cabinets to allow the manifold assemblies to be mounted inside the wall cavity. Provide manifold elbows and offsets, as required.
C.
Engineered Polymer (EP) Manifolds:
1.
Engineered Polymer manifolds assemblies shall be constructed of high-density, high impact UDEL polysulfone, Radel R polyphenylsulphone, or Acudel modified polyphenylsulfone, with minimum 1-inch (25 mm) barrel, sized for flow rates required on submitted manifold schedule, and R32 union connections.
2.
Manifold assemblies shall be furnished and installed with:
a.
Supply and return filter ball valves.
b.
Supply and return temperature gauges.
c.
Loop balancing and isolation valves.
d.
End cap with vent and drain.
e.
Mounting bracket.
f.
Manual balancing valves with visual flow indicators.
g.
ASTM F1960 fitting assemblies.
 
** NOTE TO SPECIFIER ** Only specify loop actuators if individual loop control is required.
 
h.
Individual loop actuators with adapter rings, as needed.
3.
Install flow setter on the return leg from the manifold to provide flow balancing between manifolds.
4.
Manifolds support 5/16 inch through 3/4 inch (19 mm) PEX tubing.
5.
Each manifold location shall have the ability to vent air manually from the system.
6.
Use appropriately-sized manifolds cabinets to allow the manifold assemblies to be mounted inside the wall cavity. Provide manifold elbows and offsets, as required.
D.
Copper Manifolds:
1.
For system compatibility, use 2-inch (51 mm) valved copper manifolds manufactured from Type L copper material, offered by the PEX tubing manufacturer.
2.
Install valved copper manifolds primarily for wall-hung or boxed applications.
3.
Use manifolds with an isolation valve or a combination isolation and balancing valve on each outlet.
4.
Use manifolds that support 5/8 inch (16 mm) inch or 3/4 inch (19 mm) inch PEX tubing.
5.
Ensure manifold end cap offers tapping for 1/8 inch (3 mm) FNPT and 1/2 inch (25 mm) FNPT for vent and drain.
6.
Install supply-and-return piping to the manifold in a reverse-return configuration to ensure self-balancing.
7.
If the supply-and-return piping is in direct-return configuration, install and balance flow setters on the return leg of each manifold to the mains.
2.4
PREASSEMBLED RADIANT HEATING AND COOLING ROLLOUT MATS
A.
Rollout Mats as manufactured by Uponor:
1.
Radiant Rollout Mats shall be constructed with tubing with loops at on center spacing specified.
 
** NOTE TO SPECIFIER ** Delete type not required.
 
2.
Wirsbo hePEX Tubing: 1/2 inch (13 mm) diameter tubing.
3.
Wirsbo hePEX Tubing: 5/8 inch (16 mm) diameter tubing.
 
** NOTE TO SPECIFIER ** Delete spacing not required.
 
4.
On Center Spacing: 6 inches (152 mm).
5.
On Center Spacing 9 inches (229 mm).
6.
The mats shall be constructed in nominal widths of 5 feet 91524 mm), with maximum lengths of 225 feet (69 m). The mats shall be custom-designed based on the floor plan to ensure that mat pressure drops at the required flow rates will not exceed the scheduled maximums.
7.
The mats shall be constructed with acetyl polymer support strips at every seven feet (2134 mm). Tubing shall be secured to the support strips using 6 inches (152 mm) plastic zip ties.
8.
Header assembly: In-slab reverse return header assembly shall be constructed of 3/4 inch (19 mm) Wirsbo hePEX with Engineered Polymer (EP) ASTM F1960 cold expansion fittings.
B.
Radiant Rollout Mats shall be pressure tested prior to shipping and shall be delivered to the job site under 20 psi (138 kPa) of pressure. The mats shall be tagged and permanently labeled according to the shop drawings
2.5
PIPING SPECIALTIES AND ACCESSORIES
A.
Fixing Wire: 6 inches (152 mm) galvanized steel alloy wire ties shall be used to secure PEX tubing to wire mesh or reinforcing bar.
B.
Plastic Cable Tie: Minimum 6 inches (152 mm) polyamide 6/6 nylon cable tie. Minimum 20 lb. tensile strength.
C.
Staples for Plastic Foam Insulation:
1.
Black polypropylene staples shall be used to secure 3/8 inch to 5/8 inch (9.5 mm to 16 mm) tubing directly onto rigid foam insulation. Ensure that the proper size staples are used for the insulation thickness. Use 1-1/2 inch (38 mm) staples for 1 inch (25 mm) rigid foam insulation and 2-1/2 inch (63 mm) staples for 1-1/2 inch (38 mm) or thicker foam insulation.
2.
Blue polypropylene staples shall be used to secure 3/8 inch to 3/4 inch (9.5 mm to 19 mm) tubing directly onto rigid foam insulation. Ensure that the proper size staples are used for the insulation thickness. Use 2 inch (51 mm) staples of 1 inch (25 mm) or thicker foam insulation.
D.
Metal Staples: 1-1/4 inches (32 mm) steel alloy metal staples shall be used to secure PEX tubing to wood subfloors.
E.
Plastic PEX Rails: 1-1/2 inches (38 mm) wide, 1 inch (25 mm) tall polyethylene plastic rails, with snap fit to hold tubing with spacing intervals. Spacing as indicated on approved shop drawings.
F.
Plastic Knob Mat (5/16 inch (8 mm) tubing): 1/2 inch (13 mm) thick black polystyrene knob mat with self-adhesive backing. To be used with edge insulation strips.
G.
Plastic Knob Mat (3/8 inch or 1/2 inch (9.5 mm or 13 mm) tubing): Black polystyrene knob mat with integral R-1.7 expanded polystyrene insulation. To be used with edge insulation strips.
H.
Channeled Subfloor (5/16 inch (8 mm) tubing): 1/2 inches (13 mm) thick, 7 inches (178 mm) wide plywood panels with aluminum heat transfer sheets.
I.
Heat Emission Panel (3/8 inch or 1/2 inch (9.5 mm or 13 mm) tubing as scheduled): 3-1/2 inches (89 mm) wide extruded aluminum heat transfer panels with snap fit to hold tubing.
J.
PVC Bend Supports: 90 degree PVC bend supports shall be used to sleeve tubing at slab penetrations. Bend supports shall be sized for appropriate tubing diameter.
K.
Recessed Manifold Wall Cabinets: Minimum 20-gauge (1.0 mm) galvanized steel construction with white powder-coat finish. Manifold wall cabinets shall be lockable with removable door-trim package and shall be sized to accommodate the manifolds and associated elbows, valves, pumps, etc. as required by the contract documents.
2.6
CONTROLS
A.
Refer to Sections "Instrumentation and Control for HVAC", Section "Sequence of Operations for HVAC Controls", and plans for radiant system controls.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Site Verification of Conditions: Verify that site conditions are acceptable for installation of the hydronic radiant system. Do not proceed with installation of the hydronic radiant system until unacceptable conditions are corrected.
3.2
INSTALLATION
A.
Install radiant system according to approved shop drawings or coordination drawings.
B.
Comply with manufacturer's product data, including product technical bulletins, installation instructions and design drawings, including the following.
1.
Uponor Complete Design Assistance Manual (CDAM), current edition
2.
Uponor Radiant Floor Installation Handbook, current edition
C.
Slab-on-Grade Installation:
1.
Fasten the tubing to the wire mesh or reinforcing bar using wire ties or plastic cable ties. Space ties at a maximum of 36 inches (914 mm). Secure tubing at the base and center of each bend.
2.
Fasten the tubing directly onto foam board insulation using plastic foam staples. Use the manufacturer's recommended staple size for the foam board insulation thickness. Space ties at a maximum of 36 inches (914 mm). Secure tubing at the base and center of each bend.
3.
Fasten the tubing using PEX rails. Rails shall be fastened to the insulation foam board using compatible liquid nails or silicone with maximum spacing of 36 inches (914 mm).
4.
Install edge insulation when the controlled system directly contacts an exterior wall.
5.
Install tubing at a consistent depth below the surface elevation. Maintain minimum cover as shown on plans. Ensure sufficient clearance to avoid control joint cuts.
6.
In areas where tubing must cross expansion joints in the concrete, ensure the tubing passes below the joints. If tubing must pass through an expansion joint, tubing shall be wrapped with pipe insulation for 6 inches on both sides of joint.
7.
For tubing that exits the slab in a 90-degree bend, use PVC bend supports.
8.
System shall be pressure-tested per the manufacturer's recommendations at a pressure no less than 40 psig (152 kPa). Maintain minimum 40 psig (152 kPa) pressure during the concrete pour for 24 hours during curing.
D.
Suspended Slab Construction:
1.
Fasten the tubing to the wire mesh or reinforcing bar using wire ties or plastic cable ties. Space ties at a maximum of 36 inches (914 mm). Secure tubing at the base and center of each bend.
2.
Fasten the tubing using PEX rails. Rails shall be fastened to the metal deck using compatible liquid nails or silicone with maximum spacing of 36 inches (914 mm).
3.
Install edge insulation when the controlled system directly contacts an exterior wall.
4.
Install tubing at a consistent depth below the surface elevation. Maintain minimum cover as shown on plans. Ensure sufficient clearance to avoid control joint cuts.
5.
In areas where tubing must cross expansion joints in the concrete, ensure the tubing passes below the joints. If tubing must pass through an expansion joint, tubing shall be wrapped with pipe insulation for 6 inches on both sides of joint.
6.
For tubing that exits the slab in a 90-degree bend, use PVC bend supports.
7.
System shall be pressure-tested per the manufacturer's recommendations at a pressure no less than 40 psig (152 kPa). Maintain minimum 40 psig (152 kPa) pressure during the concrete pour for 24 hours during curing.
E.
Topping Installation:
1.
Fasten the tubing to the wire mesh using wire ties or plastic cable ties. Space ties at a maximum of 36 inches (914 mm). Secure tubing at the base and center of each bend.
2.
Fasten the tubing directly onto foam board insulation using plastic foam staples. Use the manufacturer's recommended staple size for the foam board insulation thickness. Space ties at a maximum of 36 inches (914 mm). Secure tubing at the base and center of each bend.
3.
Fasten the tubing using PEX rails. Rails shall be fastened to the insulation foam board or structural slab using compatible liquid nails, silicone, or concrete anchors/screws with maximum spacing of 36 inches (914 mm).
4.
Fasten the tubing using a plastic knob mat. Install per manufacturer's recommendations.
5.
Install edge insulation when the controlled system directly contacts an exterior wall.
6.
Install tubing at a consistent depth below the surface elevation. Maintain minimum cover as shown on plans. Ensure sufficient clearance to avoid control joint cuts.
7.
In areas where tubing must cross expansion joints in the concrete, ensure the tubing passes below the joints. If tubing must pass through an expansion joint, tubing shall be wrapped with pipe insulation for 6 inches (152 mm) on both sides of joint.
8.
For tubing that exits the slab in a 90-degree bend, use PVC bend supports.
9.
System shall be pressure-tested per the manufacturer's recommendations at a pressure no less than 40 psig (152 kPa). Maintain minimum 40 psig (152 kPa) pressure during the concrete pour for 24 hours during curing.
F.
Wood Construction Installation:
1.
For wood subfloor applications, install tubing in channeled subfloor panels. Use interlocking panels with U-bend returns at each end. Install per manufacturer's recommendations.
2.
For installation below wood joists, install tubing using aluminum heat emission plates. Maintain minimum 1/4 inch (6 mm) spacing between panels to allow for thermal expansion. Install per manufacturer's recommendations.
3.
System shall be pressure-tested per the manufacturer's recommendations at a pressure no less than 40 psig (152 kPa). Maintain minimum 40 psig (152 kPa pressure during the concrete pour for 24 hours during curing.
G.
Manifold Installation: Mount manifolds in manifold wall cabinets per the approved shop drawings. Coordinate door panel finish with architectural finish schedule. Install manifold cabinets in accordance with manufacturer's recommendations.
H.
All piping to be identified with loop numbers marked on pipe wall before connecting to manifold using a permanent tag. Verify actual loop length for each loop on a manifold. All loops shall be identified to allow for future balancing.
I.
Coordinate slab tubing layout with other devices (electrical conduits and boxes, telecommunication conduits and boxes, plumbing penetrations, construction and furniture supports) and all other services within or attaching to the slab. Zones designated on the drawings shall be kept clear of all radiant floor tubing.
J.
Provide survey documentation of tubing layout after installation of tubing and prior to pouring concrete. Notify Owner's Representative three days in advance of concrete pour to allow inspection of installation and survey documentation.
3.3
ADJUSTING
A.
Balancing Loops Across the Manifold:
1.
Balance all loops across each manifold to the flow rates specified on the approved manifold schedule.
2.
Balancing is unnecessary when all loop lengths across the manifold are within 3% of each other in length. Install the supply-and-return piping to the manifold in a reverse-return configuration to ensure self-balancing.
3.4
CLEANING/RECYCING
A.
Remove temporary coverings and protection.
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. Divert waste tubing and packaging for recycling
END OF SECTION