Dantherm CDF 10 Service Manual page 17

Product- and functional description,
Built-in hygrostat, OBS! If the air humidity is below 60 %RH, the unit will not start when the power is con-
continued
We recommend installing an external hygrostat if you want to change/adjust the setting
of relative humidity very often.
LED indica- The LED on the front of the unit is green when the compressor is operating, and the
tion/switch unit dehumidifies.
The dehumidifier is switched on and off by the switch on the side.
Note! Any stop of the unit – either caused by failing power connection, by the switch
Compressor control At compressor start, the solenoid valve opens up for at least 10 sec. in order to relieve
the pressure on the compressor starting circuit.
Any stop of the unit – either caused by failing power connection, by the switch on the
side of the unit, by the hygrostat, or by the water tank's water stop function - will make
the electronic control put off re-start for 45 seconds in order to protect the compressor
from being switched on and off repeatedly.
Defrosting If the temperature falls to below 20 °C the evaporator may start to ice up after a short time.
The defrosting function is activated when the evaporator sensor registers a temperature
lower than 5 °C, after which the control will let the unit operate in dehumidification
mode for another 44 minutes. Then the fan is stopped, hot refrigerant is bypassed the
condenser and is finally led through the evaporator where it melts the ice. When the
evaporator sensor registers that the temperature is above 5 °C, the fan starts again.
Safety circuit If the temperature on the condenser coil increases to a temperature of more than 55 °C
(for example in case of fan failure), the compressor is stopped automatically to avoid
any damage. After 44 minutes the compressor starts again automatically.
At room temperatures lower than 3 °C and higher than 30 °C the unit is automatically
switched off to protect the cooling plant against icing up or superheating. When the
temperature is higher than 3 °C or lower than 30 °C the dehumidifier will automatically
start again. The temperature is registered by a sensor on the PCB.
Water tank If it is not possible to mount a fixed or a flexible drain outlet connection, the CDF 10
can be used with a water tank.
If the CDF 10 is used with a water tank, it switches off automatically when the water tank is
full. A red LED on the front panel flashes when the water tank needs to be emptied.
The water tank is an extra accessory for the CDF 10 and is available on demand.
The water tank consists of the following parts:
• Water tank cabinet with magnetic switch for water stop and cable for connection to PCB
• Water tank
• 4 machine screws
17
nected. If you want to set the hygrostat at a lower relative humidity than 60 % the
set screw has to be turned clockwise.
on the side of the unit, by the hygrostat, or by the water tank's water stop func-
tion - will make the electronic control put off re-start for 45 seconds in order to
protect the compressor from being switched on and off repeatedly.
continued