Sequence of Operation – Unit Mounted key pad mode
between room temperature and setpoint temperature is less than two degrees. At that time the electric heat will switch off and the heat pump (compressor) will take over the heating demand. The electric heater will not
Dry Mode
For Dry mode operation the unit must have an electric heater. Also the control must first be configured properly (Heat source – “ON”). See: Configuration Inter- face mode.
Dry mode will remove humidity from the air while maintaining a specific setpoint temperature. This is done by energizing the compressor in cooling along with the electric heater. Dry mode will not maintain a specific humidity level. The unit must be equipped with an optional electric heat element.
For Dry Mode operation, first turn the unit on via the ON/OFF button. Select Dry mode via the MODE button. The room temperature and setpoint temperature will be displayed. Press either the Up or Down arrow buttons to change the setpoint tem- perature. The setpoint temperature will change by one degree with each succes- sive press of the Up or Down arrow but- tons. Holding the button in will change the temperature rapidly.
Place the setpoint temperature at a desired room temperature. Depending on the difference between room temperature and setpoint temperature the compressor and/or heat source will energize. If the room temperature and setpoint tempera- ture are the same the compressor will op- erate in cooling and the electric heat will also energize.
Should the room temperature fall be- low the setpoint temperature by two de- grees, the compressor will stop and heating will continue to boost the room temperature back up to setpoint temperature. If the room temperature rises above the setpoint tem-
perature by two degrees, heating will stop and cooling will continue to bring the room temperature back down to setpoint temper- ature. The fan will operate continuously at low speed while in Dry Mode.
In order to prevent short cycling there is a two minute minimum on time for both cooling and heating. The minimum off time is 3 minutes. Also there is a 30 second de- lay between the start of the compressor and the start of the heat source.
Auto Changeover Mode
For Auto Changeover mode (ACO) the unit must have a heat source. Also the control must first be configured properly (Heat source – “ON”). See: Configuration Interface mode.
Auto Changeover mode will operate either Cooling mode or Heating mode. The control will select the mode of opera- tion depending on the setpoint tempera- ture, room temperature and the differen- tial setting selected in the Configuration mode (See Configuration mode).
For Auto Changeover mode, first turn the unit on via the ON/OFF button. Select Auto mode via the Mode button. The room temperature and setpoint temperature will be displayed. Press either the Up or Down arrow buttons to change the setpoint tem- perature. The setpoint temperature will change by one degree with each succes- sive press of the Up or Down arrow but- tons. Holding the button in will change the temperature rapidly.
Place the setpoint temperature be- low the room temperature by the dead band amount selected in the configura- tion mode. The compressor will start and the unit will run cooling operation as de- scribed under “Cool Mode”.
If the set point temperature is above the room temperature by the dead band amount selected in the configuration mode, the unit will run heating operation as described under “Heat Mode”
Set Time Mode
The “TIME” button is used to enter or exit the Set Time mode. The Set Time mode can be entered while the control is in
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