48 14 13.00 20.pdf

SABER Solicitation FA2517-08-R-5002

48 14 13.00 20-1 05/08/09

SECTION 48 14 13.00 20

SOLAR LIQUID FLATE PLATE COLLECTORS

PART 1 GENERAL

1.1 REFERENCES

1.1.1 The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. Unless other wise noted, the latest published version and/or revision shall be used.

1.1.1.1 AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

a. ASHRAE 90.1 - IP Energy Standard for Buildings Except Low-Rise Residential

Buildings, I-P Edition

b. ASHRAE 93 Methods of Testing to Determine the Thermal Performance of

Solar Collectors

c. ASHRAE 96 Methods of Testing to Determine the Thermal Performance of

Unglazed Flat-Plate Liquid-Type Solar Collectors

1.1.1.2 AMERICAN SOCIETY OF SANITARY ENGINEERING (ASSE)

a. ASSE 1003 Performance Requirements for Water Pressure Reducing Valves

1.1.1.3 AMERICAN WELDING SOCIETY (AWS)

a. AWS A5.8 Specification for Filler Metals for Brazing and Braze Welding

1.1.1.4 ASME INTERNATIONAL (ASME)

a. ASME B16.22 Standard for Wrought Copper and Copper Alloy Solder Joint

Pressure Fittings

b. ASME B16.24 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes

150, 300, 400, 600, 900, 1500, and 2500

c. ASME B16.39 Standard for Malleable Iron Threaded Pipe Unions; Classes 150, 250, and 300

d. ASME B31.1 Power Piping

e. ASME B40.100 Pressure Gauges and Gauge Attachments

f. ASME BPVC SEC VIII Boiler and Pressure Vessel Codes: Section VIII Rules for

Construction of Pressure Vessels, Division 1

1.1.1.5 ASTM INTERNATIONAL (ASTM)

a. ASTM A 193 Standard Specification for Alloy-Steel and Stainless Steel

Bolting Materials for High-Temperature Service

b. ASTM A 194 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service or Both

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c. ASTM B 168 Standard Specification for Nickel-Chromium-Iron Alloys (UNS

N06600, N06601, N06603, N06690, N06693, N06025, and

N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy

(UNS N06617) Plate, Sheet, and Strip

d. ASTM B 209 Standard Specification for Aluminum and Aluminum-Alloy

Sheet and Plate

e. ASTM B 32 Standard Specification for Solder Metal

f. ASTM B 88 Standard Specification for Seamless Copper Water Tube

g. ASTM C 1048 Standard Specification for Heat-Treated Flat Glass - Kind HS, Kind FT Coated and Uncoated Glass

h. ASTM D 3667 Rubber Seals Used in Flat-Plate Solar Collectors

ASTM E 1 Standard Specification for ASTM Liquid-in-Glass Thermometers

1.1.1.6 COPPER DEVELOPMENT ASSOCIATION (CDA)

a. CDA A4015 Copper Tube Handbook

1.1.1.7 MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

a. MSS SP-110 Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends

b. MSS SP-25 Standard Marking System for Valves, Fittings, Flanges and

Unions

c. MSS SP-58 Standard for Pipe Hangers and Supports - Materials, Design and

Manufacture

d. MSS SP-69 Standard for Pipe Hangers and Supports - Selection and

Application

e. MSS SP-72 Standard for Ball Valves with Flanged or Butt-Welding Ends for

General Service

f. MSS SP-80 Bronze Gate, Globe, Angle and Check Valves

g. MSS SP-89 Pipe Hangers and Supports - Fabrication and Installation

Practices

1.1.1.8 SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL

ASSOCIATION (SMACNA)

a. SMACNA Seismic Restraint Mnl Seismic Restraint Manual: Guidelines for Mechanical

Systems

1.1.1.9 SOLAR RATING AND CERTIFICATION CORPORATION (SRCC)

a. SRCC CSCWHSR Summary of SRCC Certified Solar Collector and Water Heating

System Ratings

b. SRCC OG-100 Operating Guidelines for Certifying Solar Collectors

1.1.1.10 U.S. DEPARTMENT OF DEFENSE (DOD)

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a. MIL-STD-101 Color Code for Pipelines & for Compressed Gas Cylinders

1.1.1.11 U.S. GENERAL SERVICES ADMINISTRATION (GSA)

a. CID A-A-59617 Unions, Brass or Bronze, Threaded Pipe Connections and Solder-

Joint Tube Connections

b. FS A-A-50560 Pumps, Centrifugal, Water Circulating, Electric-Motor-Driven

c. FS A-A-50561 Pumps, Rotary, Power-Driven, Viscous Liquids

d. FS A-A-50562 Pump Units, Centrifugal, Water, Horizontal; General Service and

Boiler-Feed: Electric-Motor- or Steam-Turbine-Driven

e. FS A-A-50568 Gages, Liquid Level Measuring, Tank

f. FS A-A-60001 Traps, Steam

g. FS F-T-2907 Tanks, Portable Hot Water Storage

h. FS WW-S-2739 Strainers, Sediment: Pipeline, Water, Air, Gas, Oil, or Steam

1.2 RELATED REQUIREMENTS

1.2.1 The information provided in this section applies to all other specification sections that are applicable to project.

1.3 SUBMITTALS

1.3.1 Government approval may be required on any of the following items. Items requiring submittals will be listed on the Submittal Register. Provide copies of all submittals per the requirements in

Section 01 33 00, Submittal Procedures, or as listed on the Submittal Register.

1.3.1.1 SD-02 Shop Drawings

a. Solar energy systems

(1) Include collector structural supports, solar collector control sequences, and instrument mounting and interconnections.

1.3.1.2 SD-03 Product Data

a. Piping

b. Instrumentation

c. Valves

d. Piping specialties

e. Pumps

f. Solar storage tanks

g. Solar collectors

h. Heat exchangers

i. Compression tanks

j. Solar-boosted domestic water heaters

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k. Collector heat transfer fluid

(1) For each pump, include manufacturer's data including pump speed and characteristic impeller performance curves. Indicate capacity versus head, efficiency, and brake power for the full range from shut-off to free delivery.

1.3.1.3 SD-06 Test Reports

a. Underground solar storage tanks holiday test

(1) Submit a factory holiday test certificate for each tank.

1.3.1.4 SD-07 Certificates

a. Solar energy system installation

(1) Submit technical representative's certification that the solar energy system installation has been done as recommended by the manufacturer.

1.3.1.5 SD-08 Manufacturer's Instructions

a. Solar energy systems

1.3.1.6 SD-10 Operation and Maintenance Data

a. Solar energy systems, Data Package 3

(1) Submit in accordance with Section 01 78 23 Operation and Maintenance Data.

1.3.1.7 SD-11 Closeout Submittals

a. Posted operating instructions for solar energy system

1.4 QUALITY ASSURANCE

1.4.1 For brazing and soldering procedure qualification, conform to ASME B31.1; for preparation and procedures for joints, conform to ASME B31.1 and CDA A4015.

1.4.2 Operation and Maintenance Data

1.4.2.1 Submit Solar Energy Systems data package for the following items in accordance with Section

01 78 23 Operation and Maintenance Data.

a. Troubleshooting guide for solar energy systems

b. Solar collector warranty

c. Operation instructions

d. Preventive maintenance and inspection data, including a schedule for system operators.

1.5 SOLAR COLLECTOR WARRANTY

1.5.1 Furnish five year manufacturer's warranty against defects in materials and workmanship.

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1.6 POSTED OPERATING INSTRUCTIONS

1.6.1 Provide for piping identification codes and diagrams of solar energy systems, operating instructions, control matrix, and trouble shooting instructions.

PART 2 PRODUCTS

2.1 SOLAR ENERGY SYSTEMS

2.1.1 Provide necessary materials to fabricate solar energy systems in accordance with this section. At the Contractor's option, provide factory-prefabricated solar equipment packages which include heat exchanger, compression and storage tanks, pumps and controls and which meet the requirements of this section.

2.2 PIPING

2.2.1 Copper Pipe

2.2.1.1 ASTM B 88M(ASTM B 88), minimum Type L, hard drawn copper tubing, except that the connection tubes of collectors may be soft-drawn.

2.2.2 Bronze Flanges and Flanged Fittings

2.2.2.1 ASME B16.24.

2.2.3 Solder-Joint Fittings

2.2.3.1 ASME B16.22, wrought copper.

2.2.4 Unions

2.2.4.1 CID A-A-59617, solder joint.

2.2.5 Dielectric Union

2.2.5.1 Provide insulated union with a galvanized steel female pipe-threaded end and a copper solder joint end conforming to ASME B16.39, Class 1. Provide a dry insulation barrier, impervious to water and capable of withstanding a 600 volt breakdown test and limiting galvanic current to one percent of the short circuit current in a corresponding bimetallic joint.

2.2.6 Expansion Joints

2.2.6.1 Bellow Expansion Joints

a. Corrugated, unreinforced or with reinforcing or equalizing rings, and single-bellow or double-bellow expansion joints. Construct bellows of copper alloy or nickel-chromium-iron alloy, conforming to ASTM B 168 or stainless steel.

2.2.6.2 Guided Slip-Tube Expansion Joints

a. Ring packing with seal to allow repacking under pressure or permanent packless seal, internally

48 14 13.00 20-6 05/08/09 and externally guided, and single or double slip-tube. Provide drain port in the housing. For packless seal, provide a Type 304 or 321 stainless steel bellows with laminated or multi-ply construction.

2.3 VALVES

2.3.1 Provide end connections as indicated. Valves shall open when turned counterclockwise.

2.3.2 Gate Valves

2.3.2.1 MSS SP-80, bronze, Class 150; Type 1, solid wedge non-rising stem or Type 2, solid wedge, inside screw rising stem; with solder, threaded, or flanged ends.

2.3.3 Globe and Angle Valves

2.3.3.1 MSS SP-80, bronze, Class 150; Type 1, metal disc integral seat or Type 2, non-metallic disc, integral seat; with solder, threaded, or flanged ends.

2.3.4 Ball Valves

2.3.4.1 MSS SP-72 for flanged or butt-welding ends or MSS SP-110 for threaded, socket-welding, solder joint, grooved and flanged ends.

2.3.5 Balancing Cocks, Flow Rate Control and Meter

2.3.5.1 Bronze, solder, threaded, or flanged ends. Provide square head, flow indicator arc or check pressure ports for differential flow metering device. Provide valve construction with rating of

240 degrees F at 125 psi.

2.3.6 Check Valves

2.3.6.1 MSS SP-80, bronze, Class 150; Type 3, swing check, metal disc to metal seat or Type 4, swing check, non-metallic disc to metal seat. Provide spring-loaded construction with elastomer seals.

2.3.7 Water Pressure-Reducing Valves

2.3.7.1 ASSE 1003 with ASSE seal, self contained, direct acting, and single seat diaphragm.

2.3.8 Control Valves

2.3.8.1 UL listed. Provide valves actuated by electric motors. Construct valves to permit replacing valve seals without draining the system. Provide bronze body construction and stainless steel valve stems, with rating of 40 to 240 degrees F at 125 psi. Include external position indicators and steel enclosures to protect operating components.

2.3.8.2 Shutoff and Diverting Control Valves

a. Bronze valves with 100 percent shutoff, stainless steel butterfly or ball, and elastomer seats and seals.

2.3.8.3 Non-Shutoff Mixing Valves

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a. MSS SP-25 marking modulating, bronze or brass body construction, stainless steel valve stems, and thermostatically controlled.

2.3.8.4 Valve Operators

a. Provide electric two-position or proportioning operators, with oil-immersed gear trains. Two-position operators may be single-direction with spring-return or reversing construction. For reversing and proportioning operators, provide limit switches to limit the lever in either direction unless the operator is the stalling type. Operators shall function properly with a 10 percent plus or minus change in the line voltage feeding the equipment. Totally enclose operators and gear trains in dustproof housings of pressed steel or metal castings with rigid conduit connections. Equip valve operators with a spring yield device so that when in the closed position it will maintain on the valve disc a pressure equivalent to the pressure rating of the valve.

2.3.9 Air Vents and Relief Valves

2.3.9.1 Air Vents

a. FS A-A-60001, float construction for pressures up to 125 psi.

2.3.9.2 Relief Valves

a. ASME labeled valves with a relief setting 200 percent higher than the normal operating pressure. Provide nonferrous or stainless steel valve seats and moving parts exposed to fluid, compatible with the operating conditions.

2.4 PIPING SPECIALTIES

2.4.1 Bolts and Nuts

2.4.1.1 Stainless steel; ASTM A 193 for bolts and ASTM A 194 for nuts.

2.4.2 Gaskets

2.4.2.1 Fluorinated elastomers, ethylene-propylene-diene-terpolymer (EPDM) or silicone ASTM D

3667, Type C rubber, compatible with flange faces.

2.4.3 Brazing Metal

2.4.3.1 AWS A5.8, 15 percent silver-base alloy, minimum melting point 1,500 degrees F, for copper pipes rated at maximum 125 psi and 350 degrees F. Provide cadmium free filler metals.

2.4.4 Solder Metal

2.4.4.1 ASTM B 32, Alloy Grade Sb5, Sn95, or Sn96, with minimum melting 430 degrees F.

2.4.5 Strainers

2.4.5.1 FS WW-S-2739, Class 125; Style Y pattern; Type I, threaded or soldered ends, for 2 inches and smaller; and Type II, flanged ends, for 2 1/2 inches and larger.

2.4.6 Piping Identification Labels

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2.4.6.1 Plastic slip-on or adhesive backed labels conforming to MIL-STD-101.

2.4.7 Hangers and Supports

2.4.7.1 MSS SP-58, as required by MSS SP-69.

2.5 BOOSTER AND CIRCULATING PUMPS

2.5.1 FS A-A-50560, in-line centrifugal, FS A-A-50562 non-self-priming, horizontally mounted, centrifugal, FS A-A-50561, rotary; pump styles as indicated. Provide flanged inlets and outlets, mechanical seals, flexible couplings, and electric motors. Select pumps to operate not more than

5 percent below and on the shut-off side of the maximum efficiency point of the impeller curve.

Provide bronze or cast iron body construction, bronze or stainless steel fitted.

2.6 COMPRESSION TANKS

2.6.1 ASME BPVC SEC VIII, steel construction with ASME label for 125 psig working pressure.

Hot-dip galvanize interior and exterior surfaces of tanks after fabrication. Provide cast iron or steel saddles or supports. Provide tanks with drain, fill, air charging and system connections, and liquid level gage.

2.7 SOLAR STORAGE TANKS

2.7.1 Except as modified herein, FS F-T-2907; stone lined (cement lined), glass lined, stainless steel, Type 18-8 stainless steel lined or baked-on phenolic steel tank with ASME label for 125 psig. Do not use baffles or perforated pipes in tank construction. For the steel tank, include collector loop heat-exchanger bundle and domestic hot water and space heating heat-exchanger bundle.

2.7.2 Underground Tanks

2.7.2.1 UL listed, double walled fiberglass coated steel tanks. Provide exterior surfaces of steel tanks with a glass reinforced isophthalic polyester resin of sufficient thickness to resist 35,000-volt

Holiday test. Provide automatic monitoring system with audible alarms to continuously monitor leaks.

2.7.3 Tank Insulations and Jackets

2.7.3.1 Comply with Section 23 07 00 Thermal Insulation for Mechanical Systems. Separate aboveground tanks from supports with insulation.

2.8 HEAT EXCHANGERS

2.8.1 ASME BPVC SEC VIII, construction with ASME label for 150 psig working pressure and 300 psig factory-rating pressure. Provide automatic monitoring system with audible alarms to continuously monitor leaks. Provide relief vent with a visual indicator to detect leaks by the change of coloring in the heat transfer fluid.

2.8.2 Plate-and-Frame Construction

2.8.2.1 Stainless steel or monel plates and carbon steel frames, with baked epoxy-enamel, and shroud.

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Provide stainless steel side bolts and nozzles. Provide one piece molded nitrile rubber, ethylene-propylene rubber viton, neoprene or butyl gaskets. Fabricate heat exchangers with design results of heat transfer coefficients greater than 1,000 Btu per square foot per hour per degree F.

2.8.3 Shell and Tube or Tube in Tube Construction

2.8.3.1 Double wall vented, straight tube or "U" tube as indicated. Low temperature water mixture shall pass through tubes. High temperature water mixture shall pass through shells. Fabricate tubes from 5/8 inch or 3/4 inch or stainless steel or seamless No. 20 BWG cupro-nickel (90-10).

Provide tube bundles removable through flanged openings.

2.9 SOLAR COLLECTORS

2.9.1 ASHRAE 93, ASHRAE 96, SRCC OG-100 and SRCC CSCWHSR listed or Florida Solar Energy

Center (FSEC) certified; liquid flat-plate collectors. Provide factory fabricated and assembled, single glazed, double glazed or triple glazed or unglazed panels. Internal manifold collectors may be used if manufacturer standard. Include the following design features:

2.9.2 Collector Sizes

2.9.2.1 Maximum filled weight not to exceed five pounds per square foot of gross collector area.

2.9.3 Minimum Performance Parameters

2.9.3.1 Provide total collector flow rate in accordance with manufacturer's recommendations. Provide instantaneous collector efficiency as follows:

Minimum Instantaneous Collector Efficiency, Percent Inlet Fluid Parameter

74 Zero

54 0.03

40 0.05

Determine inlet fluid parameter (IFP) in accordance with the following formula:

IFP = A - B

C

Where:

A = Liquid inlet temperature in collector

B = Ambient air temperature

C = Solar flux

2.9.4 Absorber

2.9.4.1 Fabricate of aluminum, stainless-steel, copper tubes on copper sheet or copper tubes with copper fins. Provide the absorber rated for 150 psig with working pressure of 125 psig.

2.9.5 Absorber Plate Coating

2.9.5.1 Electroplated black chrome with minimum 1/10 mil thick, flat black undercoating of nickel or baked-silicone-polyester, or equivalent surface coating. Provide coating with minimum

48 14 13.00 20-10 05/08/09 absorptivity 0.90, maximum emissivity 0.12, and minimum breakdown temperature at 400 degrees F.

2.9.6 Collector Case

2.9.6.1 Fabricate from at least 20 gage galvanized steel ASTM B 209M (ASTM B 209) alloy or equivalent aluminum. Paint collector box with durable baked enamel. In the back of case, provide insulation with a heat transfer factor of maximum 0.1 Btu per hour per degree F per square foot. Use only insulation without out-gassing or other breakdown at or under stagnation temperature, such as rigid mineral fiber panels. Fabricate cover frame and glazing channel of galvanized sheet steel, stainless steel or extruded aluminum. Provide preformed gaskets as specified.

2.9.7 Collector Cover (Glazing Material)

2.9.7.1 ASTM C 1048, Kind FT, fully tempered glass; Condition A, uncoated surfaces; Type I, transparent glass; Class 1, clear; Quality q3, glazing select; 1/8, 3/16 or 5/32 inch float glass as indicated.

2.9.8 Collector Identification

2.9.8.1 On each collector, provide the following information:

a. Manufacturer's name or trademark

b. Model name or number

c. Certifying agency label and rating.

2.9.8.2 Other Components

a. Provide collectors for the complete removal of internal moisture which may develop in the collectors. Collector weep holes or desiccants with air vents may be used. If desiccants are used, provide 8 mesh silica gel with approximately 10,000 cycles of regeneration.

2.10 COLLECTOR SUPPORTS

2.10.1 Provide a commercial integrated structural system, supplied by a single manufacturer, consisting of formed aluminum or galvanized or plated steel channels, perforated with round or square holes, and corrosion resistant brackets, clamps, bolts and nuts.

2.11 COLLECTOR HEAT TRANSFER FLUID

2.11.1 Conform to the following:

a. Liquid useful temperature range of 400 degrees F.

b. Non-ionic, high dielectric, non-aqueous, non-reactive, stable fluid which does not corrode copper, aluminum, iron, or steel, or attack plastics.

c. Flash point exceeding 380 degrees F.

d. Fluid stability of ten years.

e. Maximum acute oral toxicity of 5000 ppm.

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2.12 SOLAR-BOOSTED DOMESTIC WATER HEATERS

2.12.1 ASHRAE 90.1 - IP and UL listed. Provide built-in, double wall heat exchanger and factory insulation jacket.

2.13 INSULATION

2.13.1 Section 23 07 00 Thermal Insulation for Mechanical Systems.

2.14 INSTRUMENTATION

2.14.1 Use corrosion resistant materials for wetted parts of instruments.

2.14.2 Solar Controller

2.14.2.1 Solid-state or electrical only.

2.14.2.2 Differential Temperature Control

a. Factory assembled and packaged device.

2.14.2.3 High Limit Control

a. Provide high temperature cut-off to limit upper half of the storage tank temperature to be 180 degrees F.

2.14.2.4 Swimming Pool Control

a. Provide adjustable thermostatic setting to prevent pool overheating, with range from 56 to 85 degrees F. Turn solar heater on when solar collectors are 5 degrees F hotter than pool temperature. When pool temperature is above the thermostatic setting, drain water from the panels.

2.14.2.5 Controller Enclosure

a. Weathertight.

2.14.3 Differential Thermostat

2.14.3.1 Provide UL-listed differential thermostat for controlling the magnetic starter, not in the same circuit as pump motor. For integral collector freeze protection, provide two independent contact relays, rated ten amperes at 120 Vac. Provide a switch with ON, OFF, and AUTO positions. Provide weathertight enclosures.

2.14.4 Sensors

2.14.4.1 Construct sensors to withstand stagnation temperatures of glazed solar collectors. Provide primary and alternate collector sensors attached to an absorber plate. Provide copper or brass wells which can be inserted into the collector tube, or storage tank. Sensors may be strapped onto pipes and covered with insulation.

2.14.5 Pressure Gages

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2.14.5.1 ASME B40.100, brass body, and minimum 3 1/2 inch diameter dial face.

2.14.6 Tank Gages

2.14.6.1 FS A-A-50568; Type I, buoyant force; II, diaphragm; or III, purge, bubble-pipe.

2.14.7 Thermometers

2.14.7.1 ASTM E 1, liquid-in-glass type or dial type, liquid-filled tube and bulb. For pipe and tank applications, provide separate sockets fabricated of brass, copper, or stainless steel and rated for

125 psi working pressure.

2.14.8 Test Ports

2.14.8.1 Solid brass, 1/4 inch fitting to receive either a temperature or pressure probe 1/8 inch outside diameter, two valve cores of neoprene, fitted with color coded and marked cap with gasket, and rated for 1,000 psig.

2.14.9 Monitoring System

a. Btu Meter: Sensing and Monitoring device to measure and display the heat energy produced by the solar system, with minimum sensitivity of 0.5 percent over the entire scale. Provide electromechanical Btu counter plus digital-panel meter indicating sensor temperatures, differential temperature, flow rate, and Btu per minute or hour.

b. Water and Heat Transfer Fluid Leak Detection: UL-listed system consisting of a sensor probe, control panel, and LED indicators for water; yellow, and heat transfer fluid; red, with audible alarm at minimum 75 dB sound level; reference 10 exponential minus 12 watts.

2.15 SOLAR COLLECTOR CONTROL SEQUENCES

2.15.1 As indicated.

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Solar Collector System

3.1.1.1 Install the solar collector system in accordance with this section and the printed instructions of the manufacturer. Disinfect domestic water systems, if connected with collector panels, in accordance with Section 22 00 00, "Plumbing, General Purpose." Prior to system start-up, protect collector from direct sunlight.

3.1.2 Piping Installation

3.1.2.1 Accurately cut pipe to measurements established on site and work into place without springing or forcing. Locate piping out of the way of windows, doors, openings, light fixtures, electrical conduit, equipment, and other piping. Provide for expansion and contraction. Do not bury, conceal, or insulate until piping has been inspected, and tested. Locate joints where they may be readily inspected. Provide flexibility in piping connected to equipment for thermal stresses

48 14 13.00 20-13 05/08/09 and vibration. Support and anchor piping connected to equipment to prevent strain from thermal movement and weight from being imposed on equipment. Provide seismic restraints in accordance with SMACNA Seismic Restraint Mnl. Install hangers and supports in accordance with MSS SP-69 and MSS SP-89, unless otherwise indicated.

3.1.2.2 Fittings

a. Provide long-radius ells wherever possible to reduce pressure drops. Do not bend pipes, miter pipe to form elbows, use bushings, or notch straight runs to form full-sized tees. Provide union for disconnection of valves and equipment for which a means of disconnection is not otherwise provided. Provide reducing fittings for changes of pipe size.

3.1.2.3 Measurements

a. Determine and establish measurements for piping at the job site and accurately cut pipe and tubing lengths accordingly. Where possible, install full pipe lengths. Do not use couplings to join random lengths.

3.1.2.4 Cleaning

a. Thoroughly clean interior of water piping before joining by blowing clear with either steam or compressed air. Maintain cleanliness of piping throughout installation. Provide caps or plugs on ends of cleaned piping as necessary to maintain cleanliness.

3.1.2.5 Panel Connections to Headers

a. Connect panels to top and bottom headers with soft-drawn long bend "S" or "U" copper tubes brazed with 15-percent silver solder. Provide tube bender only. Hand-formed tubing will not be acceptable. Install bottom headers behind the panels to protect the header insulation from abuse. For panels with internal headers, provide copper couplings and soldering.

3.1.2.6 Header Thermal Expansion and Contraction

a. Install slip tube or bellows type expansion joints. Limit thermal expansion of collector headers to 1/4 inch for 200 degrees F maximum rise.

3.1.2.7 Flanged Joints

a. Provide flanged joints for making flanged connections to flanged pumps and other flanged piping components. Install joints so that flanged faces bear uniformly. Engage bolts so that there is complete threading through the nuts and tighten until bolts are equally torqued.

3.1.2.8 Sleeves

a. Provide schedule 10 galvanized steel sleeves for pipe and tubing passing through floors, roofs, walls and partitions of either concrete or masonry construction, except that sleeves are not required for floor slabs on grade. After piping has been installed, pack oakum into the space between the pipe or tubing and the sleeve and seal both ends with insulating cement.

3.1.2.9 Flashing

a. Provide watertight flashing for pipe and tubing extending through the roof.

3.1.2.10 Escutcheons

a. Provide chrome plated steel escutcheons for uninsulated pipe and tubing passing through floors, 48 14 13.00 20-14 05/08/09 walls and ceilings.

3.1.2.11 Drain Lines

a. Provide drain lines from air vents and relief valves to the nearest roof drains, floor drains or disposal points as directed.

3.1.2.12 Insulation and Identification

a. Insulate piping in accordance with Section 23 07 00 Thermal Insulation for Mechanical

Systems. Frostproof air vents by insulating or shielding from night sky reverse radiation. After piping has been insulated, apply identification labels and arrows in accordance with MIL-STD-

101. Apply identification over the insulation jacket of piping. Provide two copies of the piping identification code framed under glass and install where directed.

3.1.2.13 Excavating and Backfilling

a. Provide in accordance with Section 31 00 00 Earthwork. Coordinate provision of utility warning and identification tape with backfill operation. Provide tapes above buried lines at a depth of 8 to 12 inches below finish grade.

3.1.3 Instrumentation

3.1.3.1 Install instruments as recommended by the control manufacturers. For the monitoring system to detect water and heat transfer fluid, locate the sensor probe in the lowest corner of double-wall tank and heat exchanger. Locate control panels inside mechanical room.

3.2 FIELD QUALITY CONTROL

3.2.1 Field Inspection

3.2.1.1 Prior to initial operation, inspect the piping system for conformance to drawings, specifications and ASME B31.1. Inspect the following information on each collector:

a. Manufacturer's name or trademark

b. Model name or number

c. Certifying agency label and rating.

3.2.2 Tests

3.2.2.1 Provide equipment and apparatus required for performing tests. Correct defects disclosed by the tests and repeat tests. Conduct testing in the presence of the Contracting Officer.

3.2.2.2 Piping Test

a. Test new water piping for leakage using water at a pressure of at least 100 psig or 1.5 times the system pressure. Install a calibrated test pressure gage in the system to indicate loss in pressure occurring during the test. Apply and maintain the test pressure for one hour, during which time there shall be no evidence of leakage, as detected by a reduction in test pressure. Should a reduction occur, locate leaks, repair, and repeat the test.

3.2.2.3 Operation Tests

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a. Perform tests on mechanical systems, including pumps, controls, controlled valves, and other components in accordance with manufacturer's written recommendations. Test entire system in accordance with Section 23 05 93.00 10 Testing, Adjusting, and Balancing of HVAC Systems.

3.2.3 Manufacturer's Field Services

3.2.3.1 Furnish the services of a technical representative of the collector manufacturer, at the job site during each phase of inspection, installation, and testing. For solar collectors, furnish the services of a manufacturer's representative to instruct Government personnel for one manday, in the operating and maintenance of equipment. Notify the Contracting Officer in writing, prior to scheduling instructions.

END OF SECTION 48 14 13.00 20