14. Start-up
Crankcase heaters are energized as long as there is power to the unit. Energize heaters 24
hours prior to unit start-up.
Cooling Mode
Verify that the unit airflow rate is adjusted according to information provided in "Determining
Evaporator Fan Adjustment" section of this manual.
To start the unit in the cooling mode, close unit disconnect switch and set the operating mode to
COOL and move the cooling setpoint approximately 5˚C below room temperature. The
condenser fan motor, compressor and evaporator fan motor should operate automatically. There
will be a delay of up to 3 minutes before the unit will start in the cooling mode.
Heating Mode
(Heat pump model only)
Verify that the unit airflow rate is adjusted according to information provided in "Determining
Evaporator Fan Adjustment" section of this manual.
To start the unit in the Heating mode, close unit disconnect switch and set the operating mode to
HEAT and move the Heating setpoint approximately 5˚C above room temperature. The
condenser fan motor, compressor and evaporator fan motor should operate automatically. There
will be a delay of up to 3 minutes before the unit will start in the Heating mode.
Electric Heater Mode (optional)
(Cooling model only)
Check to ensure all grilles and registers are open and all unit access doors are closed
before start-up.
Turn on unit main power supply.
Press the E/Heater operation button on the Remote controller.
Set the temperature approximately 5˚C above room temperature.
Heating & Electric Heater (optional)
(Heat pump model only)
To start the unit in the heating operation mode, and Electric Heater operation Mode, close
unit disconnect switch and set the operating mode to Heat and move the Heating setpoint
approximately 5°C above room temperature.
The condenser fan motor, compressor and evaporator fan motor Electric Heater should
operate automatically.
There will be delay of up to 3 minutes before the unit will start in the Heating mode.
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