Energy Tech Laboratories Homes Northwest manual Ground Source Heat Pumps

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3.2.3Manufacturer shall provide a list of all known acceptable materials used in the closed-loop circulation system. All metal parts contacting the circulating fluid shall be defined in terms of metallurgical content.

3.2.4Manufacturer's recommendations should be followed when charging an earth loop with antifreeze.

3.2.5In cases where the antifreeze is considered flammable, the antifreeze shall be diluted with water to a point at which it is nonflammable before it can be used indoors.

3.2.6All systems shall be labeled and identified at the service ports. The labels shall be of a permanent type with the following information:

3.2.6.1Antifreeze type and concentration

3.2.6.2Service-date.

3.2.6.3Company name.

3.2.6.4Company phone number and responsible party or person.

4.0GROUND SOURCE HEAT PUMPS

4.1Water Source Heat Pumps.

4.1.1Water source heat pumps used in conjunction with ground heat exchangers shall be certified by the respective manufacturer to operate satisfactorily at the recommended maximum and minimum entering water temperatures as set forth in the design of the ground heat exchanger.

4.1.2The maximum and minimum design entering water temperatures shall not exceed the manufacturer's published data.

4.1.3The 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.

4.1.4Maximum and minimum entering liquid temperatures will be determined by the local ground temperatures and acceptable practice and within the manufacturer's limits.

4.2Heat Pump Piping and materials.

4.2.1All indoor piping, including the heat pump water heat exchanger shall be insulated to prevent condensation.

ENERGY STAR Homes Northwest

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Geothermal Heat Pump Design and Installation Standards

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Contents Energy Star Homes Northwest Geothermal Heat Pump Design and Installation Standards Closed Loop Ground Heat Exchangers Geothermal Heat Pump Design and Installation Standards Geothermal Heat Pump Design and Installation Standards Pipe Placement and Backfilling Indoor Piping and Circulation System Ground Source Heat Pumps Commissioning and Verification for Ground Source Heat Pumps

Homes Northwest specifications

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