E/0204/39/26
9. Cooling Components
The components inside each unit (outdoor and indoor) are connected by copper piping, appropriately
welded to ensure a greater seal. The two units must be connected to each other, as described in
chapter 12.
9.1 REFRIGERANT
The refrigerant that is used can be: R407c (HFC).
OPTIONAL: R134a, R22.
9.2 COMPRESSOR
Two types of compressor are used:
- alternative hermetic (CVS40 only)
- scroll.
Compressors are basically composed of an electric motor and a mechanical section which is
powered by this motor for pumping the refrigerant gas.
In reciprocating compressors the pumping unit consists of a piston which slides inside a cylinder
and which generates, depending on its phase, compression and aspiration.
In scroll compressors the pumping unit consists of two spirals positioned one inside the other. One
spiral is fixed while the other performs orbital motion which aspirates and compresses the gas.
9.3 CONDENSER
This part allows the release of the heat of the coolant gas in the environment. It consists of an
exchange pack with copper piping and aluminium fins (suitable only for non-corrosive and non-
salty environments).
9.4 FILTER DRYER
This is a mixed mechanical/chemical filter and serves the purpose of filtering the coolant which
goes through it, at the same time eliminating humidity particles.
9.5 THERMOSTATIC VALVE
This adapts coolant evaporation pressure, inside the evaporator exchanger, to the real thermal
load.
This component is factory set during testing and must not be tampered with.
9.6 EVAPORATOR
This is the part where the transfer of the heat, contained in the air in the cabinet, to the coolant gas
takes place. It consists of copper pipes and aluminium fins (suitable only for non-corrosive and
non-salty environments).
