Summary of Contents for Energy Star Homes Northwest
- Page 1 ® ENERGY STAR Homes Northwest GEOTHERMAL HEAT PUMP DESIGN AND INSTALLATION STANDARDS April 20, 2005...
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Page 2: Table Of Contents
ENERGY STAR Homes Northwest Geothermal Heat Pump Design and Installation Standards CLOSED LOOP GROUND HEAT EXCHANGERS ... 1 NSTALLATION ERSONNEL AND 1.4. D ESIGN ETHODS AND QUIPMENT NSTALLATION 1.6. G ROUND XCHANGER OINING METHODS LUSHING URGING IPING ARRANGEMENT PIPE PLACEMENT AND BACKFILLING ... 4 2.1. -
Page 3: Closed Loop Ground Heat Exchangers
1.3.2 Heat Pump Thermostat Capability: Heat pump thermostats shall have the capability of supporting a lock out to limit supplemental heater use. The thermostat shall have a minimum of two stage heating control. -
Page 4: Design Methods And Compliance
The pipe and fittings of the buried system shall be warranted by the manufacturer for ground source heat pump service. 1.6.3 Sufficient information shall be permanently marked on the length of the pipe that allows the pipe to be properly identified. ENERGY STAR Homes Northwest Geothermal Heat Pump Design and Installation Standards... -
Page 5: Pipe Joining Methods
Heat exchangers will be tested hydrostatically at 150% of the pipe design rating, or 300% of the system operating pressure if this value is the smaller of the two. ENERGY STAR Homes Northwest Geothermal Heat Pump Design and Installation Standards... -
Page 6: Piping Arrangement
The dry section of a vertical bore holes shall be backfilled to ensure good heat transfer. Local and State codes as to backfilling requirements shall be followed. In some cases a bentonite grout/slurry will be required. ENERGY STAR Homes Northwest Geothermal Heat Pump Design and Installation Standards... -
Page 7: Indoor Piping And Circulation System
The sensing ports should be within two (2) feet of the heat pump, and should be at the unit connections whenever possible. -
Page 8: Ground Source Heat Pumps
4.1.3 The water source heat pump will be ARI certified under rating ARI 325 for ground water heat pumps. For ground heat exchanger designed with EWT in the heating mode of 60 degrees Fahrenheit or greater, ARI 320 is acceptable. -
Page 9: Commissioning And Verification For Ground Source Heat Pumps
(if it does not run continuously). 5.1.3 Measure airflow across across the unit’s coil to verify system meets design criteria, per ENERGY STAR® Homes Northwest SPECIFICATIONS AND TECHNICAL REFERENCE FOR SITE-BUILT SINGLE FAMILY HOMES ENERGY STAR Homes Northwest Geothermal Heat Pump Design and Installation Standards...
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