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	SECTION 13640
	SOLAR HOT WATER SYSTEM
	Copyright 2010 - 2013 ARCAT, Inc. - All rights reserved
	** NOTE TO SPECIFIER ** VELUX America Inc.; Solar Water Heating System products. . This section is based on the products of VELUX America Inc., which is located at: 104 Ben Casey Dr. Fort Mill, SC 29708 Toll Free Tel: 800-888-3589 Tel: 803-396-5738 Fax: 803-396-5701 Email: request info Web: www.veluxusa.com [ Click Here ] for additional information. Established in 1975, VELUX America is a branch of the VELUX Group charged with marketing and selling VELUX roof windows, skylights, tubular skylights, and solar water heating systems in the US. For 65 years, VELUX has been utilizing the power of the sun to bring natural light into homes and commercial buildings through skylights, tubular skylights, and roof windows --over the past 15 years VELUX has been enabling consumers to harness even more power from the sun with VELUX solar water heating systems. The VELUX solar water heating product range contains a wide assortment of systems for composite roof integration, tile roof integration, or rack mounted systems for metal roofs or low pitch applications to 15 degrees from horizontal. The VELUX roof integrated solar collector systems utilize the same roof flashing materials used with VELUX skylight products providing the same look and performance the building industry has come to expect from a VELUX product. VELUX offers many solar tank options including those with various backup heat source options. Systems are also available for "2 tank" solar preheat applications, and "1 tank" solar applications with electric, natural gas, propane, or boiler backup options. This specification covers a complete VELUX packaged solar water heating systems that are offered as total system packages and component deletions or substitutions are not permitted. This specification includes a roof integrated or rack mounted, closed loop, solar water heating system designed for heating of domestic water using flat plate liquid solar collectors.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Solar Collectors.
		B.	Solar Collector Mounting Hardware.
		C.	Solar storage tanks.
		D.	Solar Pump Station and Controllers.
		E.	Heat Transfer Fluid.
		F.	Piping system and insulation.
		G.	Balancing Valves.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 06100 - Rough Carpentry: Framing and roof sheathing.
		B.	Section 07210 - Building Insulation.
		C.	Section 07260 - Vapor Retarders.
		D.	Section ____ - Roofing and Flashing: Flashing of roof mounted solar panel connections.
		E.	Section 15140 - Domestic Water Piping
		F.	Section 15480 - Domestic Water Heaters.
		G.	Section 16150 - Wiring Connections: Execution requirements for electric connections specified by this section.
	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.	SRCC OG-100 - Operating Guidelines and Minimum Standards For Certifying Solar Thermal Collectors.
		B.	SRCC OG-300 - Operating Guidelines and Minimum Standards For Certifying Solar Water Heating Systems.
		C.	ASSE 1017 - Temperature Actuated Mixing Valves for Hot Water Distribution.
		D.	ANSI Z21.22 - Relief Valves for Hot Water Supply Systems.
		E.	ASHRAE 90.1 - Energy Standard for Buildings Except Low-Rise Residential Buildings.
		F.	ASTM E 330 - Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure.
	1.4	DESIGN / PERFORMANCE REQUIREMENTS
	** NOTE TO SPECIFIER ** Edit references from the list below as required. Note that SRCC OG-300 minimum SEF rating varies by system type selected. Insert minimum rating required. Visit www.solar-rating.org/ratings/ratings.htm or contact manufacturer for SRCC OG-100 listed collectors, SRCC OG-300 listed systems, and system SEF ratings for additional information.
		A.	Solar water heating systems shall have a SRCC OG-300 minimum SEF (Solar Energy Factor) rating of ________.
		B.	Solar Collectors shall be provided with a SRCC OG-100 rating label or nameplate certifying the Solar Collector Certification and Rating for each collector. Solar collectors shall have a minimum SRCC Category "C", Clear Day, performance rating of 1,200 Btu/day per square foot of collector net aperture.
		C.	Solar storage tank shall be provided with a SRCC OG-300 rating label or nameplate certifying the Solar Water Heating Systems Certification and Rating.
		D.	Systems must be safe, reliable, require no operator intervention for normal operation, be visually unobtrusive, and be designed and installed in accordance with all applicable codes.
	** NOTE TO SPECIFIER ** Coordinate the orientation of solar collectors with the Drawings to optimize the location and angle of the array. Solar collectors must be located in an area with minimal solar shading throughout the daylight hours, and within the following design parameters.
			1.	Solar collectors shall be oriented within 45 degrees of south.
			2.	Solar collectors shall be pitched within 15 to 60 degrees from horizontal
	1.5	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation methods.
		C.	Shop Drawings: Indicate manufactured assembly's system components and control schematics, solar collector installation, layout, weights, mounting and support details, flashings, heat exchanger and pump installation, storage and expansion tank installation, vents, valves, interconnecting piping, insulation and instrumentation.
		D.	Operation and Maintenance Data: Provide with spare parts lists, procedures, treatment programs and schematic showing the complete system layout. Include operating instructions with preventative maintenance procedures, methods of checking the system for normal safe operation, and procedures for starting and stopping the system.
		E.	Manufacturer's Certificates: Certify products meet or exceed specified requirements.
		F.	Field Test Reports: Submit reports of piping hydraulic pressure test and commissioning. Include: collector model number and serial numbers, storage tank model and serial number, expansion tank pressure, system pressure, system flow rate, percent propylene glycol to distilled water, solar loop temperature setting, and backup system temperature setting. Include results of acceptance testing.
		G.	Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic checking and periodic cleaning and maintenance of all components.
	1.6	QUALITY ASSURANCE
		A.	Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with minimum three years documented experience.
		B.	Installer Qualifications: Company specializing in performing Work of this section with documented experience and approved by manufacturer.
	1.7	DELIVERY, STORAGE, AND HANDLING
		A.	Store products in manufacturer's unopened packaging until ready for installation.
		B.	Store and protect products in accordance with manufacturer's recommendations.
		C.	Protect pipe openings and piping from debris and other foreign matter by using caps on piping connections.
	1.8	SEQUENCING
		A.	Ensure that locating templates and other information required for installation of products of this section are furnished to affected trades in time to prevent interruption of construction progress.
		B.	Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
	1.9	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.
	1.10	WARRANTY
		A.	Solar Collectors and roof integrated flashing, manufacturer's 10 year limited warranty.
		B.	Solar storage tanks, manufacturer's 6 year limited warranty.
		C.	Solar pump station, manufacturer's 5 year limited warranty.
		D.	Mounting Hardware, manufacturer's 5 year limited warranty.
		E.	Interconnecting piping and fittings, manufacturer's 5 year limited warranty.
		F.	Electrical Components Wiring, manufacturer's 5 year limited warranty.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: VELUX America Inc., which is located at: 104 Ben Casey Dr. ; Fort Mill, SC 29708; Toll Free Tel: 800-888-3589; Tel: 803-396-5738; Fax: 803-396-5701; Email: request info; Web: www.veluxusa.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 01600.
	2.2	APPLICATIONS/SCOPE
	** NOTE TO SPECIFIER ** Edit the following paragraphs as required to identify the components required for the solar water system. Identify solar collector size, orientation and layout on the Drawings. Contact the manufacturer for additional information.
		A.	Solar Hot Water System: Flat plate solar collector, closed loop/indirect hot water heating system with internal tank coil passive heat exchanger. System consists of the following primary components:
			1.	Solar Collectors: Solar collector array as indicated on the Drawings.
			2.	Solar Collector Mounting Assembly: Collector Mounting Racks and Hardware.
			3.	Solar Storage Tanks: Solar Storage Tank(s) as required to suit the system specified.
			4.	Solar Pump Station: Pump, pressure and temperature gauges, shut-off valves, pressure relief valve, fill valves, flow meter and controllers for number of collectors specified with expansion tank to suit the system specified.
			5.	Propylene-glycol heat transfer fluid.
			6.	Automatic air vent valve.
			7.	Piping System and Insulation: Piping system and pipe insulation with required pipe hangers and supports, and balancing valves for multiple collector banks if required.
	** NOTE TO SPECIFIER ** Edit the following paragraphs as required to select the collector types and sizes required in combination with the tanks, pumps, valves and control devices specified. For additional information contact the manufacturer.
	2.3	SOLAR COLLECTORS
		A.	Solar Collectors: Flat plate, liquid type provided with cover glazing, an absorber plate, heat transfer liquid flow tubes, internal headers, weep holes, insulation, and a casing. Collectors shall be of weather-tight construction. Solar collectors shall withstand a stagnation temperature of 190 degrees C (374 degrees F) and a working pressure of 80 psig without degrading, out-gassing, or warping.
			1.	Type:
	** NOTE TO SPECIFIER ** Select the collector type required from the following paragraphs and delete those not required. Show the collector size and orientation on the Drawings.
				a.	Rack Mounted Collector: CLR U12 4000:
					1)	Gross Panel Size: 54.1 inches wide by 72 inches high.
						a)	Gross Collector Area: 27.1 SF.
						b)	Gross Depth: 3.9 inches.
					2)	Gross Weight with Fluid: 141 lbs.
					3)	Fluid Capacity: 0.58 gallons.
					4)	Maximum Operating Pressure: 87 psi (10.34 Bar).
					5)	Test Pressure: 145 psi (10.34 Bar).
					6)	Structural Design Pressure:
						a)	Downward Load 70 psf.
						b)	Uplift load 60 psf.
				b.	Roof Integrated Collector: CLI U12 4000:
					1)	Gross Panel Size: 54.1 inches wide by 72 inches high.
						a)	Gross Collector Area: 27.1 SF.
						b)	Gross Depth: 3.9 inches.
					2)	Gross Weight with Fluid: 141 lbs.
					3)	Fluid Capacity: 0.58 gallons.
					4)	Maximum Operating Pressure: 87 psi (10.34 Bar).
					5)	Test Pressure: 145 psi (10.34 Bar).
					6)	Structural Design Pressure as measured in accordance with ASTM E 330:
						a)	Downward Load 125 psf.
						b)	Uplift load 60 psf.
				c.	Roof Integrated Collector: CLI S06 4000:
					1)	Gross Panel Size: 46.2 inches wide by 47.5 inches high.
						a)	Gross Collector Area: 15.2 SF.
						b)	Gross Depth: 3.9 inches.
					2)	Gross Weight with Fluid: 79 lbs.
					3)	Fluid Capacity: 0.34 gallons.
					4)	Maximum Operating Pressure: 87 psi (10.34 Bar).
					5)	Test Pressure: 145 psi (10.34 Bar).
					6)	Structural Design Pressure as measured in accordance with ASTM E 330:
						a)	Downward Load 200 psf.
						b)	Uplift load 87.5 psf.
				d.	Roof Integrated Collector: CLI M08 4000:
					1)	Gross Panel Size: 32 inches wide by 56.2 inches high.
						a)	Gross Collector Area: 12.2 SF.
						b)	Gross Depth: 3.9 inches.
					2)	Gross Weight with Fluid: 64 lbs.
					3)	Fluid Capacity: 0.24 gallons.
					4)	Maximum Operating Pressure: 87 psi (10.34 Bar).
					5)	Test Pressure: 145 psi (10.34 Bar).
					6)	Structural Design Pressure as measured in accordance with ASTM E 330:
						a)	Downward Load 255 psf.
						b)	Uplift load 55 psf.
			2.	Construction:
				a.	Absorber plate shall be copper with top of absorber plate coated with highly selective absorber coating and an emissivity less than or equal to 0.05 and absorptivity greater than or equal to 0.95. Coating shall be applied by the cathode sputtering process.
				b.	Flow tubes shall be copper and be laser welded to the absorber plate.
				c.	Each collector shall have a single layer of cover glazing made of low iron type tempered glass with a direct solar transmittance greater than 0.89.
				d.	Back and sides of the absorber plate shall be insulated with rock wool. Insulation shall fill space between absorber plate and casing and shall have a maximum K-factor of 0.035 W/m K.
				e.	Casing shall be extruded aluminum alloy 6063-T5 with minimum thickness of 0.055 inch unless noted. Finish shall be factory applied Kynar 500. Provide for thermal expansion between the cover and absorber plates and the casing, and for drainage of moisture through weep holes
	** NOTE TO SPECIFIER ** Edit as required to select the collector mounting hardware required. For additional information contact the manufacturer.
	2.4	SOLAR COLLECTOR MOUNTING HARDWARE
		A.	Roof Integrated Collector Mounting Hardware and Flashing: Provide flashing and mounting kits as required for the roofing materials as indicated on the Drawings.
			1.	EDL or EKL flashing kits for shingle or thin roofing materials. Prefabricated step flashing systems designed for use with roofing materials less than 3/4 inch thick and for roof slopes of 15 degrees to 85 degrees.
			2.	EDW or EKW flashing kits for tile or thick roofing materials. Prefabricated gutter flashing systems designed for use with tile roofing materials greater than 3/4 inch thick and for roof slopes of 15 degrees to 85 degrees. Sill flashing section consists of corrugated apron to allow form fit of roofing material profile.
		B.	Rack Mounted Collector Mounting Hardware and Material: Provide rack kits of the type and in locations indicated on the Drawings.
			1.	Parallel rack kits are used to fasten collectors flush against a sloped roof or structure with roof pitch of 15 degrees to 85 degrees. Parallel rack kits shall include:
				a.	Extruded aluminum rails.
				b.	Mounting feet, angle brackets, bolts, nuts and washers.
			2.	Adjustable rack kits are used to install collectors on low slope surfaces (pitch less than 15 degrees) or when a variable collector pitch or orientation is desired to achieve maximum solar gain.
				a.	Extruded aluminum rails.
				b.	Front and rear rack legs.
				c.	Mounting feet, angle brackets, bolts, nuts and washers.
		C.	Mounting and Assembly Hardware: Rack systems, mounting brackets, hinges, cladding, and/or flashing components shall be manufactured by VELUX, or approved by VELUX for use with the VELUX solar thermal collectors. No substitutions are allowed.
		D.	Assembly hardware including all bolts, washers, and nuts shall be stainless steel or zinc coated high alloy steel.
	** NOTE TO SPECIFIER ** Edit the following paragraphs as required to select the solar storage tanks required. Contact the manufacturer for additional information.
	2.5	SOLAR STORAGE TANKS
	** NOTE TO SPECIFIER ** Select the following paragraph for Solar Preheat Storage Tank used with two tank solar water heating systems with solar preheat and a standard electric, gas, or tankless water heater. Delete if not required.
		A.	Solar Preheat Storage Tanks: Tank shall be glass lined carbon steel construction for potable service. Glass lining shall be engineered enamel that provides superior protection from the corrosive effects of hot water. Solar storage tanks shall meet or exceed the requirements of ASHRAE 90.1b.
			1.	Capacity:
	** NOTE TO SPECIFIER ** Select following paragraphs and delete the ones not required.
				a.	60 gallon.
				b.	75 gallon.
				c.	115 gallon.
			2.	Components:
				a.	Drain valve: Brass construction with tamper proof design. Used to flush sediment, which may accumulate on the bottom of the solar storage tank and also provide a means of draining the tank.
				b.	Internal solar heat exchanger: Double wall enamel coated steel heat exchanger with positive leak detection, to ensure separation of potable water and heat transfer fluid. Provide 3/4 inch NPT female connections supply and return connections. Heat exchanger shall have an outside diameter of 1-1/2 inch, minimum heat transfer area of 14 sq. ft., and a minimum stored water volume of 2-1/2 gallons.
				c.	Potable water connections: Provide with top mounted factory installed 3/4 inch NPT male true dielectric fittings with integral heat traps.
				d.	Temperature and pressure relief valve: Comply with ANSI Z21.22 standards for relief valves. No valve of any type should be installed between the relief valve and tank.
				e.	Insulation: Sides and top of the tank shall be insulated with 2 inches of non-CFC foam insulation providing a minimum tank R-Value of R-17.
				f.	Two protective aluminum anode rods for added corrosion protection.
	** NOTE TO SPECIFIER ** Select the following paragraph for Solar Storage Tank with Integral Electric Backup for one tank solar heating systems utilizing integral electric backup heat source. Delete if not required.
		B.	Solar Storage Tank with Integral Electric Backup: Solar storage tanks shall meet or exceed the requirements of ASHRAE 90.1b.
			1.	Tank shall have a minimum backup capacity of
	** NOTE TO SPECIFIER ** Select one of the following tank capacity paragraphs and delete the ones not required.
				a.	60 gallons
				b.	75 gallons.
				c.	115 gallons.
			2.	Components
				a.	Drain valve: Brass construction with tamper proof design. Used to flush sediment, which may accumulate on the bottom of the solar storage tank and also provide a means of draining the tank.
				b.	Internal solar heat exchanger: Double wall enamel coated steel heat exchanger with positive leak detection, to ensure separation of potable water and heat transfer fluid. Provide 3/4 inch NPT female connections supply and return connections. Heat exchanger shall have an outside diameter of 1-1/2 inch, minimum heat transfer area of 14 sq. ft., and a minimum stored water volume of 2-1/2 gallons.
				c.	Potable water connections: Provide with top mounted factory installed 3/4 inch NPT male true dielectric fittings with integral heat traps.
				d.	Temperature and pressure relief valve: Comply with ANSI Z21.22 standards for relief valves. No valve of any type should be installed between the relief valve and tank.
				e.	Insulation: Sides and top of the tank shall be insulated with 2 inches of non-CFC foam insulation providing a minimum tank R-Value of R-17.
				f.	Two protective aluminum anode rods for added corrosion protection.
			3.	Tank shall have screw in style dual auxiliary immersed Incoloy electric heating elements configured for non-simultaneous operation.
				a.	Each element shall have an energy input of 4500W.
				b.	Back electric elements shall be activated only when the desired minimum set point temperature set on the back-up thermostat cannot be satisfied by the solar gain achieved from the solar collector.
	** NOTE TO SPECIFIER ** Select the following paragraph for Solar Storage Tank with Integral Boiler Backup for one tank solar heating systems utilizing integral boiler heat exchanger for backup heat source. Delete if not required.
		C.	Solar Storage Tank with Integral Boiler Backup:Solar storage tanks shall meet or exceed the requirements of ASHRAE 90.1b.
			1.	Capacity:
	** NOTE TO SPECIFIER ** Select one of the following paragraphs and delete the ones not required.
				a.	55 gallon.
				b.	70 gallon.
				c.	110 gallon.
			2.	Components
				a.	Drain valve: Brass construction with tamper proof design. Used to flush sediment, which may accumulate on the bottom of the solar storage tank and also provide a means of draining the tank.
				b.	Internal solar heat exchanger: Double wall enamel coated steel heat exchanger with positive leak detection, to ensure separation of potable water and heat transfer fluid. Provide 3/4 inch NPT female connections supply and return connections. Heat exchanger shall have an outside diameter of 1-1/2 inch, minimum heat transfer area of 14 sq. ft., and a minimum stored water volume of 2-1/2 gallons.
				c.	Potable water connections: Provide with top mounted factory installed 3/4 inch male NPT true dielectric fittings with integral heat traps.
				d.	Temperature and pressure relief valve: Comply with ANSI Z21.22 standards for relief valves. No valve of any type should be installed between the relief valve and tank.
				e.	Insulation: Sides and top of the tank shall be insulated with 2 inches of non-CFC foam insulation providing a minimum tank R-Value of R-17.
				f.	Three protective aluminum anode rods for added corrosion protection.
			3.	Tank shall have integral single wall auxiliary heat exchanger for connection to a backup boiler system with 1 inch NPT female supply and return connections.
				a.	Back-up boiler shall be activated only when the desired minimum set point temperature set on the back-up thermostat cannot be satisfied by the solar input from the solar collector.
				b.	Provide with boiler back-up aquastat that will activate boiler to circulate the hot water generated from the boiler into the heat exchanger located on the top section of the solar storage tank. Once the controller is satisfied and has reached its desired set point, it will shut off the boiler.
			4.	Tank shall have a minimum backup capacity of:
	** NOTE TO SPECIFIER ** Select one of the following tank capacity paragraphs and delete the ones not required.
				a.	27 gallons for 55 gallon tanks.
				b.	37 gallons for 70 gallon tanks.
				c.	67 gallons for 110 gallon tanks.
	** NOTE TO SPECIFIER ** Select the following paragraph for Solar Storage Tank with Integral Atmospheric Gas Backup for one tank solar heating systems utilizing integral gas backup heat source. Delete if not required.
		D.	Solar Storage Tank with Integral Atmospheric Gas Backup.Solar storage tanks shall meet or exceed the requirements of ASHRAE 90.1b.
			1.	Capacity:
	** NOTE TO SPECIFIER ** Select one of the following paragraphs and delete the ones not required.
				a.	60 gallon.
				b.	70 gallon.
			2.	Components
				a.	Drain valve: Brass construction with tamper proof design. Used to flush sediment, which may accumulate on the bottom of the solar storage tank and also provide a means of draining the tank.
				b.	Internal solar heat exchanger: Double wall enamel coated steel heat exchanger with positive leak detection, to ensure separation of potable water and heat transfer fluid. Provide 3/4 inch NPT female connections supply and return connections. Heat exchanger shall have an outside diameter of 1-1/2 inch, minimum heat transfer area of 14 sq. ft., and a minimum stored water volume of 2-1/2 gallons.
				c.	Potable water connections: Provide with top mounted factory installed 3/4 inch male NPT true dielectric fittings with integral heat traps.
				d.	Temperature and pressure relief valve: Comply with ANSI Z21.22 standards for relief valves. No valve of any type should be installed between the relief valve and tank.
				e.	Insulation: Sides and top of the tank shall be insulated with 2 inches of non-CFC foam insulation providing a minimum tank R-Value of R-17.
				f.	Two protective aluminum anode rods for added corrosion protection.
			3.	Tank shall have under-fired natural gas or liquid propane backup burner. Burner shall be activated by a temperature sensor located in the upper portion of the tank such that the burner is activated only when the desired setpoint cannot be satisfied by the solar gain achieved from the solar collector.
	** NOTE TO SPECIFIER ** Select the following paragraph for 60 gallon tank capacity.
			4.	Tank shall have flammable vapor ignition resistant technology (FVIR) designed to prevent ignition of flammable vapors outside of the water heater for all 60 gallon models.
	** NOTE TO SPECIFIER ** Select the following paragraph for 60 gallon tank capacity with natural gas burner only.
			5.	Tank shall have ultra low NOx burner complying with SCAQMD Rule 1121. for 60 gallon natural gas models.
	** NOTE TO SPECIFIER ** Select one of the following paragraph for 70 gallon tank capacity.
			6.	Tank shall have low NOx backup burner.
			7.	Tank shall have Honeywell self diagnostic gas control with proven millivolt powered technology and built-in piezo ignitor.
			8.	Provide with a 4 inch vent connector and draft hood.
			9.	Tank shall have a minimum backup capacity of:
	** NOTE TO SPECIFIER ** Select one of the following tank capacity paragraphs and delete the one not required.
				a.	60 gallons for 60 gallon tanks.
				b.	70 gallons for 70 gallon tanks.
	** NOTE TO SPECIFIER ** Select the following paragraph for Solar Storage Tank with Integral Power Vent Gas Backup for one tank solar heating systems utilizing integral gas backup heat source. Delete if not required.
		E.	Solar Storage Tank with Integral Power Vent Gas Backup: Solar storage tanks shall meet or exceed the requirements of ASHRAE 90.1b.
			1.	Capacity:
	** NOTE TO SPECIFIER ** Select one of the following paragraphs and delete the ones not required.
				a.	60 gallon.
				b.	70 gallon.
			2.	Components
				a.	Drain valve: Brass construction with tamper proof design. Used to flush sediment, which may accumulate on the bottom of the solar storage tank and also provide a means of draining the tank.
				b.	Internal solar heat exchanger: Double wall enamel coated steel heat exchanger with positive leak detection, to ensure separation of potable water and heat transfer fluid. Provide 3/4 inch NPT female connections supply and return connections. Heat exchanger shall have an outside diameter of 1-1/2 inch, minimum heat transfer area of 14 sq. ft., and a minimum stored water volume of 2-1/2 gallons.
				c.	Potable water connections: Provide with top mounted factory installed 3/4 inch male NPT true dielectric fittings with integral heat traps.
				d.	Temperature and pressure relief valve: Comply with ANSI Z21.22 standards for relief valves. No valve of any type should be installed between the relief valve and tank.
				e.	Insulation: Sides and top of the tank shall be insulated with 2 inches of non-CFC foam insulation providing a minimum tank R-Value of R-17.
				f.	Tank shall have two protective aluminum anode rods to provide added corrosion protection.
				g.	Tank shall have under-fired natural gas or liquid propane backup burner. Burner shall be activated by a temperature sensor located in the upper portion of the tank such that the burner is activated only when the desired setpoint cannot be satisfied by the solar gain achieved from the solar collector.
	** NOTE TO SPECIFIER ** Select the following paragraph for 60 gallon tank capacity.
				h.	Tank shall have flammable vapor ignition resistant technology (FVIR) designed to prevent ignition of flammable vapors outside of the water heater for all 60 gallon models.
	** NOTE TO SPECIFIER ** Select the following paragraph for 60 gallon tank capacity with natural gas burner only.
				i.	Tank shall have ultra low NOx burner complying with SCAQMD Rule 1121 for 60 gallon natural gas models.
	** NOTE TO SPECIFIER ** Select one of the following paragraph for 70 gallon tank capacity.
				j.	Tank shall have low NOx backup burner.
				k.	Tank shall have 120 Volt Honeywell self diagnostic gas control.
				l.	Provide with 4 inch vent connector.
			3.	Tank shall have a minimum backup capacity of:
				a.	60 gallons for 60 gallon tanks.
				b.	70 gallons for 70 gallon tanks.
	** NOTE TO SPECIFIER ** Edit as required to select the tanks, pumps, valves and control devices specified. Contact the manufacturer for additional information.
	2.6	SOLAR PUMP STATION AND CONTROLLERS
		A.	General: Solar pump station substation includes solar loop safety devices, circulating pump, temperature and pressure gauges, check valves, ball valves, flow meter, fill and drain valves, and differential temperature control to properly operate the solar water heating system. System control shall be capable of displaying temperatures for the collector and storage tank.
		B.	Solar Differential Temperature Control: Solar differential temperature control is provided with the following capabilities.
			1.	Differential controls with direct digital temperature readings of all temperatures sensed.
			2.	Controller with visual indicators when pumps are energized.
			3.	Controller with indicators for open and short circuits on both the solar collector temperature sensor circuit and the storage tank sensor circuit.
			4.	Integral controller that turns the solar loop pump on or off depending on the heat gained in the solar collectors.
			5.	Controller that limits overheating in the solar collectors and overheating in the solar storage tank.
		C.	Temperature And Pressure Gauges:
			1.	Integral temperature gauges provided to show the temperature being supplied and returned to the solar collector and through the storage tank heat exchanger.
			2.	A pressure gauge is included to show the solar loop system pressure.
		D.	Check Valves: Provide integral check valves in the "hot" and "cold" lines to minimize convective heat loss when the system is not operating.
		E.	Collector Array Isolation Ball Valves:
			1.	Provide ball valves in the "hot" and "cold" lines of solar pump station to isolate the solar collector loop from the solar storage tank.
			2.	Provide ball valves for shutoff, with full port, bronze body, bronze ball and Teflon seat.
		F.	Pressure Relief Valve: Provide solar pump station with an integral pressure relief valve for the solar loop with 87 PSI setpoint.
		G.	System Fill And Drain Valves: Provide integral fill and drain valves to charge the system with heat transfer fluid and also eliminate air from the system during system commissioning.
		H.	Circulator: Circulator shall be a cast iron body, 3 speed, inline circulator rated for 19 feet head. Circulator shall be integral to solar pump station and located in "cold" return line to solar collectors. Circulator shall be UL listed.
		I.	Expansion Tank: Solar loop expansion tank shall be of drawn steel construction with a Butyl diaphragm separating the air chamber from the heat transfer fluid containing chamber. Inlet connector shall be brass. Diaphragm materials shall be FDA approved. Provide a mounting bracket with double-check disconnect fitting for easy service and replacement of the expansion tank
		J.	Flow Meter: Provide integral flow meter with 0.5 to 3.5 gpm flow range. Flow meter shall be brass and include an integral ball valve and borosilicate site glass for setting solar loop flow rate.
		K.	Temperature Sensors: Provide PT 1000 temperature sensors for collector and tank temperature monitoring. Temperature sensors shall be compatible with the differential temperature controller.
		L.	Automatic Air Vent Valve: Provide system with a maintenance free microbubble deaerator, automatic air vent valve suitable for continuous operation in solar applications utilizing water/propylene glycol heat transfer fluid.
			1.	Material:
				a.	Body: Forged Brass.
				b.	Vent Head: Forged Brass.
				c.	Float: Non-ferrous.
				d.	Coalescing Medium: Polyphenylsulfone (PPSU).
				e.	Maximum Working Pressure: 150 psig.
				f.	Maximum Operating Temperature: 240 degrees F.
		M.	Hot Water System Tempering Valve: Provide system with an ASSE 1017 listed mixing valve to limit the temperature of the hot water supplied to the plumbing fixtures. Mixing valve shall be preset to 120 degrees F.
			1.	Material:
				a.	Body: Nickel plated brass/bronze construction.
				b.	Springs: Stainless steel.
				c.	Thermostat Assembly: Copper.
				d.	O-Rings: EPDM.
			2.	Pressure/ Temperature:
				a.	Minimum Supply Pressure (Static): 30 psi .
				b.	Inlet Temperatures:
					1)	Hot inlet, 120 degrees F to 200 degrees F.
					2)	Cold inlet, 40 degrees F to 85 degrees F.
				c.	Hot Water Inlet to Outlet Temperature Differential: 10 degrees F.
				d.	Temperature Out: Field range: 70 degrees F to 145 degrees F adjustable: Accurate within plus or minus 3 degrees F.
				e.	Maximum Temperature: 200 degrees F.
				f.	Maximum Pressure: 150 psi.
	2.7	HEAT TRANSFER FLUID
		A.	Heat transfer fluid shall be industrially inhibited propylene glycol-based fluid designed to provide freeze/burst and corrosion protection in water-based, closed-loop solar systems. Heat transfer fluid shall have an operating temperature range of minus 10 degrees F to plus 325 degrees F; with fluid freeze protection to below minus 10 degrees F, and system burst protection to below minus 60 degrees F.
	** NOTE TO SPECIFIER ** Edit the following paragraphs as required to select the piping system and insulation required. Contact the manufacturer for additional information.
	2.8	PIPING SYSTEM AND INSULATION
		A.	Solar Loop Piping:
	** NOTE TO SPECIFIER ** Select one of the following pipe material paragraphs as required and delete the paragraph not required.
			1.	Corrugated stainless steel with minimum 1/2 inch Armaflex HT insulation, and brass connection fittings.
			2.	Type L or Type M copper tubing and brass fittings with Armaflex HT insulation as required.
		B.	Piping connections to solar collectors shall be by special conical fittings that do not utilize o-rings, gaskets, welds or sealants.
		C.	Protect outside piping insulation from water damage and ultraviolet degradation with a suitable outer coating.
		D.	Provide pipe hangers and supports that accommodate thermal expansion and contraction.
	** NOTE TO SPECIFIER ** Include the following paragraphs for use with multiple collector banks as required. Delete if not required.
	2.9	BALANCING VALVES
		A.	For systems with multiple collector banks, provide balancing valves suitable for 125 psig and 250 degree F service.
		B.	Furnish balancing valves with bronze body/brass ball construction with seat rings compatible with system fluid and differential readout ports across valve seat area.
		C.	Provide readout ports fitted with internal insert of compatible material and check valve.
		D.	Provide calibrated balancing valves with a memory stop feature to allow valve to be closed for service and reopened to set point without disturbing balance position, and with a calibrated nameplate to assure specific valve settings.
		E.	Provide calibrated balancing valves and ball valves at the outlet of the collector bank. Provide balancing valves to allow the array to be flow balanced and to enable the array to be disconnected for maintenance or repair.
	2.10	PAINTING AND FINISHING
		A.	Furnish equipment and component items, with the manufacturer's factory applied standard finish.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates have been properly prepared.
		B.	Verify the suitability of roof deck and other substrates to receive solar water heating system collector units.
		C.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
	3.2	PREPARATION
		A.	Clean surfaces thoroughly prior to installation.
		B.	Dissimilar Materials Protection:
			1.	Where aluminum will contact dissimilar metals, protect against galvanic action by painting contact surfaces with primer or by applying sealant or tape recommended by manufacturer.
			2.	Where aluminum will contact concrete or masonry, protect against corrosion by painting contact surfaces with bituminous paint.
			3.	Where aluminum will contact pressure-treated wood, separate dissimilar materials by methods recommended by manufacturer
		C.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
	** NOTE TO SPECIFIER ** Edit the following paragraphs as required. Contact the manufacturer for additional information.
	3.3	INSTALLATION
		A.	Install in accordance with manufacturer's instructions.
		B.	General:
			1.	Anchor components securely to supporting structural substrates, adequate to withstand lateral and thermal stresses as well as inward and outward loading pressures.
			2.	Coordinate with installation of vapor barriers, roof insulation, roofing, and flashing as required to assure that each element of the work performs properly and that combined elements are waterproof and weather tight.
		C.	Piping: Install piping straight and true to bear evenly on hangers and supports. Do not hang piping from sheet rocks or suspended ceilings. Support piping so that thermal expansion and contraction of pipe lengths is accommodated.
			1.	Slope piping and arrange systems to drain at low points.
			2.	Keep interior and ends of new piping thoroughly cleaned of foreign matter. Keep piping systems clean during installation by means of plugs or other approved methods.
			3.	Discharge storage tank pressure and temperature relief valves into floor drains.
			4.	Maintain clearance for access to valves and fittings. Install valves with stems upright or horizontal.
			5.	Flush and disinfect the piping system after installation and prior to start-up.
		D.	Solar Collectors:
			1.	Collector Array: Install solar collector array at the proper tilt angle, orientation, and elevation above roof. Install the solar collectors with the ability to be removed for maintenance, repair, or replacement.
			2.	Array Piping: Install collector array piping in a reverse-return configuration so that path lengths of collector supply and return are of approximately equal length. Provide proper pitch for draining of collector array.
			3.	Array Support: Install array support in accordance with the recommendations of the manufacturer.
	** NOTE TO SPECIFIER ** Insert the appropriate spec section reference in the following paragraph as required.
			4.	Roof Penetrations: Roof penetrations shall be made permanently waterproof. Coordinate work with the roofing and flashing specified in Section __________.
		E.	Install electrical devices furnished loose for field mounting.
		F.	Install control wiring between control panel and field mounted control devices.
		G.	Connect to power source as specified in Section 16150.
	3.4	CLEANING AND PROTECTION
		A.	Protect installed products until completion of project.
		B.	Clean exposed metal and surfaces according to manufacturer's instructions. Touch up damaged metal coatings.
		C.	Clean solar collector glazing not more than 5 days prior to date of substantial completion.
		D.	Touch-up, repair or replace damaged products before Substantial Completion.
	3.5	INSPECTION AND TESTING
		A.	Acceptance Testing and Final Inspection: Provide the following tests:
			1.	Flush System: Flush with clean water for one-hour minimum. Drain completely and refill. Remove, clean, and provide new strainer screens. Inspect, remove sludge, and flush low points with clean water after cleaning process is completed.
			2.	Fill System: Fill system and vent air pockets. Verify proper percentage of propylene glycol to distilled water.
			3.	Hydrostatic Test: Hydrostatically test the system. Isolate valving and instrumentation not suitable for the intended test pressure.
			4.	Operational Test: Operationally test the system over a period of 48 consecutive hours with sufficient solar exposure to cause activation of the solar energy system during daylight hours.
			5.	Overall System Operations: Demonstrate the solar energy system will operate properly while unattended for a period of at least 72 hours.
	3.6	DEMONSTRATION
		A.	Provide field-training for the Owner and/or the Owner's representatives after the system is functionally complete. Include a discussion of the system design and layout and demonstrate routine operation, maintenance and troubleshooting procedures.
	END OF SECTION