Zoneline - Vertical Air Conditioner Heat Pump Operation

Zoneline single packaged vertical air conditioners (VTAC) will operate in efficient heat pump mode down to a 30 degree F outdoor coil temperature. At temperatures below this, the unit will automatically switch to electric heat. When the outdoor temperature rises to 45°F, the unit will automatically switch back to heat pump operation. The resistance heater and the heat pump do not operate simultaneously.

 

Additionally, full electric resistance heat is utilized when the unit is operating in heat pump mode and the temperature in the room falls more than 4°F below the thermostat set point.