Dantherm AC-24, Service Manual

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Description Both evaporator and condenser are heat exchangers with copper tubes and aluminium coated
fins. By the cooling of the evaporator air stream heat is adapted to the cooling circuit and
released in the condenser together with the electric energy consumption of the compressor.
At room temperatures below 20 °C, where cooling is not normally required, the humidity in
the airflow will form ice on the evaporator. To prevent this, the LP pressure switch cuts out
at low pressure in the circuit. If the room temperature is too low, the LP activation will cause
the compressor to start and stop frequently. This may damage the compressor and must be
avoided at any time by not operating the product outside the specified temperature range.
See section “Technical data”, page 45. At high ambient temperatures (above 55 °C) the cooling
of the condenser airflow will be too poor, and the high pressure results in cut out of the HP
pressure switch.
The yellow lamp on the front panel will illuminate if the HP/LP pressure switch cuts out.
The HP/LP pressure switch automatically resets after a few minutes and the lamp will switch
off again. If the lamp continues to illuminate, please refer to the “Fault finding guide”, page 41.
Schematic view This schematic drawing illustrates the different parts of the cooling circuit.

Compressor

Expansion valve
 Condenser  Evaporator
 Receiver  HP pressure switch
 Dry filter  LP pressure switch
 Sight glass
Description of the cooling system, continued
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