Dantherm AC-24, Service Manual

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Illustration This drawing illustrates the different parts
of the cooling circuit and where
they are situated in the AC 24 unit:
Parts and their function
This table gives an overview and short description of each part shown above and on
the next page:
 Compressor Circulates the fluid in the cooling system
 Condenser Emits the heat generated in the tent/room to the outside air

Receiver Accumulates surplus coolant in connection with the
cooling process

Dry filter Absorbs moisture and impurities in the cooling circuit
 Sight glass Enables a visual check of the coolant
 Expansion valve Supplies the correct quantity of coolant into the evaporator.
It also reduces the pressure
 Evaporator Absorbs heat from the shelter by cooling down the
circulated air
 HP pressure
switch Ensures that the compressor does not operate at too high
pressure
 LP Pressure
switch Ensures that the compressor does not operate at too low
pressure
Refrigerant The cooling circuit is hermetically sealed and filled with refrigerant (R134a).
Liquid flow
From the receiver

liquid refrigerant will flow under high pressure through the liquid
line dryer and the sight glass to the thermostatic expansion valve which releases the
pressure. Here the refrigerant is led into the evaporator

where it evaporates under
low pressure and low temperatures.
The evaporated refrigerant is drawn back to the hermetic compressor and
compressed. From the compressor the refrigerant vapour goes to the condenser,
where it is cooled to below the dew point and condensed to liquid refrigerant.
Description of the cooling system









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