8.1. SR 11-13-2006 - Laserfiche WebLink

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Engineering Guide Specifications General: The GeoSource heat pump system and the ground loop field shall be one system and include all interconnecting piping and controls to provide an efficient, harmoniously-balanced package. Ground Loop: The ground loop field shall be constructed of high-density polyethylene or poly- butylene piping. Its layout shall be of parallel circuits terminated at a reducing header of reverse-return design. All underground joints shall be fusion-welded. The ground loop field shall be designed to provide a 250F water/antifreeze mixture to the heat pumps during the month of January. The antifreeze shall be GTF heat transfer fluid mixed 50% by volume with water of 100-PPM grain hardness or less. The heat pumps shall work over extended-range ground-loop temperature variations (150F to 11 OOF). The piping shall consist of sufficient pump capacity with suction and discharge pressure ports. Valves shall be incorporated for purging all debris and air from the total system. All backfilling and grouting shall be done in accordance with IGSHP A guidelines. All heat pumps shall be installed with PIT ports for pressure and temperature measurement. Cabinet: The heat pump cabinet shall be constructed of heavy-gauge Galvaneal corrosion- resistant steel coated with a baked-on powder epoxy finish and shall be insulated with 1/2" high-density fiberglass insulation. It shall be oriented to allow complete component service access from the front. Legend for Tables BTU/hr CAP COP CFM DB DHW dP EER EWT FLA Heating or cooling capacity Capacity Coefficient of performance (BTU/hr out + BTU/hr in) Cubic feet per minute Dry-bulb entering air temperature Domestic hot water Pressure drop across heat pump (in feet of water and psi) Energy efficiency ratio (BTU/hr out + watts in) Entering water temperature (in degrees Fahrenheit) Full-load amperage Refrigerant Circuit: Compressors shall be hermetically-sealed high-efficiency compliant scroll mounted on vibration isolators. The water heat exchanger shall be either non-coaxial open- center canister-type with enhanced heat exchanger surface, or stainless steel brazed plate. An optional domestic water desuperheater coil of vented double copper construction for potable water shall have an over-temperature control. The expansion device shall be a bi-flow thermostatic metering valve. The reversing valve shall be of copper construction with 24VAC control with fail-to-heating positioning. All heat pumps shall have a factory-installed filter/drier. Controls: All units shall incorporate both low- and high-pressure switches and freeze protection with total refrigerant lockout and manual reset upon application. All units shall have random start and be anti-short cycle protected. Testing and Warranty: All heat pumps shall be factory run-tested with ASHRAE test lab standards at simulated design conditions for a minimum of two hours to assure component and system integrity. All units shall be tested by and rated in accordance with IS0-13256 and CSA C22.2 test laboratory safety and performance standards. All heat pumps shall carry a 2/5 residential or a 1/5 commercial warranty. GPM Gallons per minute of water flow HE Heat extracted HR Heat rejected KW Kilowatt input LRA Locked-rotor amperage MBTU/hr Btulhr X 1000 RLA Rated-load amperage VA Volt-amperes WB Wet. bulb entering air temperature All Pressure Drop Ratings are for Pure Water Performance values are +/- 10%, and are subject to change without notice.