Technical Description - Dometic CoolAir RT 780 Operating Manual

CoolAir RT780
5

Technical description

The parking cooler can be used for variable air conditioning inside the vehicle. The
air in the interior is guided into the system through the intake grille, cooled, dried and
conveyed back into the interior through the blower nozzles. The system is operated
using the control panel or the remote control.
I
NOTE
The parking cooler can lower the temperature within the vehicle to a
certain level. The temperature depends on the type of vehicle, the
ambient temperature and the cooling capacity of your parking cooler.
For the cooling capacity of your parking cooler, see chapter "Technical
data" on page 20.
The system is fitted with a battery monitor. If the system is operated when the vehicle
ignition is switched off, the parking cooler switches off automatically as soon as the
supply voltage falls below a set level.
The refrigerant circuit of the parking cooler consists of four main components:
• Compressor
The compressor draws in the R-134a refrigerant and compresses it. This raises the
pressure and therefore the temperature of the refrigerant.
• Condenser
The built-in condenser works like a cooler or heat exchanger. The air flowing past
absorbs the heat and the hot refrigerant gas cools down and becomes liquid.
• Capillary tube
The capillary tube reduces the refrigerant from the higher condenser pressure to
the lower vaporisation pressure.
• Vaporiser
The vaporiser cools down the air flowing past and dehumidifies it. The refrigerant
absorbs the heat and vaporises. The cooled air is distributed within the vehicle
through an air outlet unit.
EN
Technical description
9