1.3.4Thermostat Staging: Resistance electric heat shall not be energized under the first heating stage of the indoor thermostat. Thermostat indicator lights shall provide a visible indication when the auxiliary stage or emergency heat is operating.
1.3.5Emergency Heat Relay: All indoor thermostats shall include a manual selector switch to permit all supplemental heaters to be energized under control of the indoor thermostat (with the bypassed) when the compressor or refrigerant system is inoperative.
1.4.Design Methods and Compliance
1.4.1The manufacturer of GSHP equipment shall provide design standards for minimum ground heat exchanger lengths.
1.4.2The manufacturer's design procedure shall follow a recognized methodology such as presented in:
1.4.2.1
1.4.2.2Data Design Manual for
1.4.3The ground heat exchanger design shall be clearly documented as complying with manufacturer's standards.
1.5Equipment Installation
1.5.1All equipment shall be located and installed according to manufacturer specifications and guidelines, all applicable codes and standards, and accepted industry practices.
1.6.Ground Heat Exchanger Materials
1.6.1Acceptable pipe materials for the underground buried portion of the ground heat exchanger are polyethylene and polybutylene.
1.6.2The pipe and fittings of the buried system shall be warranted by the manufacturer for ground source heat pump service.
1.6.3Sufficient information shall be permanently marked on the length of the pipe that allows the pipe to be properly identified.
ENERGY STAR Homes Northwest | 2 |
