Standards. Split System Heat Pump units are designed for use with a wide variety of fossil fuel furnaces, electric furnaces, air handlers, and evaporator coil combinations. These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and/or air conditioning appliances. Some local codes require licensed installation/ service personnel for this type of equipment. Read all instructions carefully before starting the installation. USER’S INFORMATION IMPORTANT Read this owner information to become familiar with the capabilities and use of your appliance. Keep this with literature on other appliances where you have easy access to it in the future. If a problem occurs, check the instructions and follow recommendations given. If these suggestions don’t eliminate your problem, call your servicing contractor. Heat Pump Principle of Operation 5 4 12 3 6 5 4 3 2 1 6 WINTER HEATING 1. Outdoor air enters heat pump. 2. Cold, heat-transfer section (outdoor coil) extracts heat from outdoor air as refrigerant evaporates from a liquid to a gas. 3. Refrigerant, compressed to a hot gas by heat pump, carries the heat to the hot heat- transfer section (indoor coil). 4. Hot, heat-transfer section (indoor coil) releases the heat to indoor air as refrigerant condenses from a gas to a liquid. 5. Air handler circulates the heat throughout the home. 6. Refrigerant returns to outdoor coil and evaporates once again to absorb more heat. SUMMER COOLING 1. Indoor air enters the air handler section. 2. Cold, heat-transfer section (indoor coil) extracts heat from indoor air as refrigerant evaporates from a liquid to a cold gas. 3. Refrigerant, drawn to heat pump and compressed to a hot gas by heat pump, carries the heat outdoors. 4. Hot, heat-transfer section (outdoor coil) releases the heat as refrigerant condenses from a gas to a liquid. 5. Heat pump (outdoor fan) discharges the heat to outside air. 6. Refrigerant returns to indoor coil and evaporates once again to absorb more heat. 2 OPERATING INSTRUCTIONS TO OPERATE YOUR HEAT PUMP FOR COOLING — 1. Set the thermostat system switch to COOL and the thermostat fan switch to AUTO.(See Figure 1) 2. Set the thermostat temperature to the desired temperature level using the temperature selector. Please refer to the separate detailed thermostat user’s manual for complete instructions regarding thermostat programming.The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired cooling level. NOTE: If the thermostat temperature level is re-adjusted, or the thermostat system switch is repositioned, the outdoor unit may not start immediately.The outdoor unit contains a protective timer circuit which holds the unit off for approximately five minutes following a previous operation, or the interruption of the main electrical power. TO OPERATE YOUR HEAT PUMP FOR HEATING — 1. Set the thermostat system switch to HEAT and the thermostat fan switch to AUTO. (See Figure 1) 2. Set the thermostat temperature to the desired temperature level using the temperature selector. Please refer to the separate detailed thermostat user’s manual for complete instructions regarding thermostat programming.The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired heating level. NOTE: If the thermostat temperature level is re-adjusted, or the thermostat system switch is repositioned, the outdoor unit may not start immediately.The outdoor unit contains a protective timer circuit which holds the unit off for approximately five minutes following a previous operation, or the interruption of the main electrical power. Emergency Heat: The thermostat includes a system switch position termed EM. HT. This is a back-up heating mode to be used only if there is a suspected problem with the outdoor unit. With the system switch set to EM. HT. the outdoor unit will be locked off, and supplemental heat (typically electric resistance heating) will be used as a source of heat. Sustained use of electric resistance heat in place of the heat pump will result in an increase in electric utility costs. Defrost: During cold weather heating operation, the outdoor unit will develop a coating Figure 1. Typical Thermostat of snow and ice on the heat transfer coil. This is normal, and the unit will periodically defrost itself. During the defrost cycle, the outdoor fan will stop, and the compressor will continue to run and heat the outdoor coil, causing the snow and ice to melt. After the snow and ice have melted, some steam may rise from the outdoor unit as the warm coil causes some melted frost to evaporate. TO OPERATE YOUR HEAT PUMP FOR AUTOMATIC COOLING AND HEATING — 1. Set the thermostat system switch to AUTO and the thermostat fan switch to AUTO.(See Figure 1) Note: Thermostats will vary. Some models will not include the AUTO mode, and others will have the AUTO in place of the HEAT and COO...