Dantherm CDP 85 - Other Control Options; External RH;T Sensor; Dew Point Sensor; Icing Sequence

Other control options: External RH/T sensor
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Other control options
The control is prepared for the connection of an external RH/T sensor, which is placed in the
room to be dehumidied or in the supply air duct – (air inlet).
The external RH/T sensor is available as an accessory.
External RH/T
sensor
When the evaporator sensor registers a temperature below 5°C, the control interprets this
as ice building up on the evaporator coil and lets the unit run for another 30 minutes. If the
evaporator sensor still registers below 5°C after the 30 minutes have passed, the compressor
then stops and the fan draws in warm air from the room to de-ice the evaporator until the
evaporator sensor registers that the temperature is above 5°C.
De-icing
sequence
An external NTC temperature sensor can be connected as a dew point sensor.
This sensor can be attached to any cold surface to prevent condensation.
The dehumidier will automatically keep dew point below the cold surface temperature.
Dew point sensor
Ice build-up
prevention
The fan speed is automatically adjusted to minimize ice build-up in the evaporator at low am-
bient temperature. When the evaporator coil temperature drops below 3°C the fan speed will
increase gradually until it reaches full speed to raise the evaporator temperature and prevent
the forming of ice. When the evaporator coil temperature exceeds 5°C the fan speed will gradu-
ally decrease to the chosen setting.
HP-prevention
The fan speed is automatically adjusted to prevent HP Error due to high ambient temperature
when running at reduced fan speed setting. When the condenser coil temperature is less than
10°C below the software HP setting the fan speed will automatically increase to prevent HP
Error. The fan speed will increase until it reaches maximum speed. If increase is insucient the
HP Error will be activated and the unit stops automatically. See ‘HP Error’ description.
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