Dometic FreshWell FWX4350EHP Installation And Operating Manual page 19

The under-bench air conditioner can lower the temperature within the vehicle to a certain level. The temperature de-
pends on the type of vehicle, the ambient temperature, and the cooling capacity of the under-bench air conditioner.
The under-bench air conditioner is equipped with a defrost and a cold air prevention function. The defrost function
prevents the external heat exchanger from icing up in the heating mode. The cold air prevention function prevents
cold air from being blown into the vehicle while in heating mode.
Components
The refrigerant circuit of the under-bench air conditioner consists of the following main components:
Fig.  on page 1
• Compressor (1)
The compressor draws in the refrigerant used and compresses it. This raises the pressure and the temperature
of the refrigerant.
• Condenser (2)
The condenser ensures that the air flowing past absorbs the heat and the hot refrigerant gas cools down and
becomes liquid.
• Evaporator (3)
The evaporators cool down and dehumidify the air flowing past them. The refrigerant absorbs the heat and va-
porises.
• Blower (4)
The blower distributes the cooled or heated air within the vehicle through an air outlet unit.
• 4-way valve (5)
The 4-way valve reverses the cooling circuit. Thus the internal register of the evaporator becomes a condenser
and heats the air passing through.
• Electric heating element (6)
The electric heating element increases the heating effect when the outer temperature is low.
• Air inlet (7), air outlet (8) for external heat exchanger
Air is drawn into the under-bench air conditioner through the air inlet and escapes through the air outlet.
• Register output (9), air inlet (10) for internal heat exchanger
Air is drawn into the under-bench air conditioner through the air inlet and escapes through the register output.
Depending on the operating mode, the internal heat exchanger heats or cools the air.
Remote control
The settings of the under-bench air conditioner are performed via remote control.
The remote control is equipped with the following control and display elements: Fig.  on page 2
EN
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