Additional specifications for GE Zoneline 3500 Series Packaged Terminal Heat Pump (for 5500 series units use specifications noted for 5500 series instead of these specifications).
Heat pump units shall automatically change from heat pump operation to electric resistance heat when heat pump operation is unable to produce sufficient heat to maintain room temperature within 2.7°F. of thermostat set point, or when the outdoor coil temperature falls below 9°F. - approximately 25°F. outdoor temperature.
Heat pump unit shall automatically begin a passive defrost cycle when the outdoor coil temperature drops below 9°F. Defrosting shall be accomplished by natural defrost with unit automatically reinitiating heat pump operation when outdoor coil reaches 37°F.
Unit shall be equipped with a temperature activated drain valve to allow water generated in heat pump operation and defrost cycles to drain into wall case rather than being deposited on outdoor coil.
Each time the heat mode is selected, or the unit is powered up in the heat mode selection, the heat pump will use electric resistance heat to bring room temperature to selected thermostat set point. Heat pump operation will be used on subsequent unit heating operation if the room temperature is within 2.7°F of the set point and the unit is not in the defrost cycle.
Unit shall have a switch concealed from room occupant to allow heat pump operation to be overridden and heat provided by electric resistance heat regardless of outdoor temperature.
In the event of compressor failure during heat pump operation, unit shall automatically switch to electric resistance heat to maintain selected room temperature regardless of outdoor temperatures.
Alternate specifications for GE Zoneline 5500 Series Packaged Terminal Heat Pump (for 3500 series units use specifications noted for 3500 series instead of these specifications).
Heat pump units shall provide operation that will either:
A)automatically phase in partial electric resistance heat, if outdoor temperature is below 46°F., simultaneously with heat pump if heat pump alone is unable to maintain room temperature; or B) use partial electric resistance heat simultaneous with heat pump operation any time the outdoor temperature is below 45°F. Selection of A or B operation is made by means of a selector switch concealed from room occupant. In either A or B operation the unit will switch to full resistance heat if room temperature continues to decline or the outdoor temperature falls below 25°F. If the outdoor temperature is above 46°F., unit will lock out electric resistance heat and operate on heat pump only.
Heat pump unit shall include Reverse Cycle Defrost that automatically begins a defrost cycle when microprocessor determines criteria for defrosting has been met. Defrosting shall be accomplished by systematically ceasing heat pump operation, pausing to allow internal refrigerant pressures to equalize, then operating the compressor with the flow of refrigerant reversed, to allow the hot gas to flow through the outdoor coil melting the accumulated frost. Unit shall automatically resume heat pump operation, after pausing to allow refrigerant pressures to equalize, at conclusion of defrost cycle.
Unit shall be equipped with a temperature activated drain valve to allow water generated in heat pump operation and defrost cycles to drain into wall case rather than being deposited on outdoor coil.
Each time the heat mode is selected, or the unit is powered up in the heat mode selection, the heat pump will use electric resistance heat to bring room temperature to selected thermostat set point. Heat pump operation will be used on subsequent unit heating operation if the room temperature is within 2.7°F of the set point and the unit is not in the defrost cycle.
Unit shall have a switch concealed from room occupant to allow heat pump operation to be overridden and heat provided by electric resistance heat regardless of outdoor temperature.
In the event of compressor failure during heat pump operation, unit shall automatically switch to electric resistance heat to maintain selected room temperature regardless of outdoor temperatures.
Specifications for Optional Internal Condensate Removal (ICR) system for Zoneline 3500 or 5500 series heat pump units.
Unit shall have a factory installed Internal Condensate Removal (ICR) system to permit unit to automatically dispose of heat pump generated condensate water with no overflow to outdoors to occur during heating under outdoor ambient of 55°F. Dry Bulb, 90% Relative Humidity; indoor ambient 70°F. Dry Bulb, 52% Relative Humidity, for four hours of continuous run time.
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