Dometic Frigo, Operating Manual

Page: 6 / 416

EN
Technical description Frigo
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4 Technical description
4.1 Function description
Gaseous refrigerant emerging from the evaporator output is sucked up by the com-
pressor, compressed and discharged. The hot gas, which is under high pressure, is
fed to the condenser (a heat exchanger with a large surface) and discharges its heat
into the atmosphere, whereby it transforms from gas into liquid.
The cooled refrigerant is now injected into the evaporator, where it loses pressure
and turns back to gas. In this condition it extracts heat from the atmosphere of the
evaporator (i.e. the cooling area).
With air circulation defrosting, de-icing of the evaporator is accomplished with the
evaporator fans.
With hot gas defrosting, hot refrigerant is passed through the evaporator during
defrosting. The temperature rises at the evaporator, which is freed of ice.
The compressor for cooling while driving is driven directly by the vehicle engine via
a V-belt. For the standby cooling (accessory), a second compressor is used, which is
powered by a 230 V mains supply.
I
4.2 Interior fittings
The instructions of the company making the installations relating to loading should
be followed.
NOTE
‡
The complete air conditioning functionality is still available for vehi-
cles with original air conditioner. The air conditioning system can still
be used when driving with the cooling system switched off. Please
refer to the operating manual for your vehicle for information on the
use and function of the air conditioning.
‡
On vehicles equipped with an automatic start/stop system, the func-
tion must be switched off during operation of the cooling system.
Please refer to the operating manual for your vehicle for information
on the use and function of the automatic start/stop system.
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