E/0204/39/18
Condenser
Condenser fan
Evaporator fan
Antifreeze
thermostat
Regulating
thermostat
Evaporator
HP switch
Compressor
Expansion valve
3. Operating Principle
Split-Air STULZ conditioners are designed to cool rooms containing technological systems. They
are designed for internal installation. Their use allows to eliminate problems caused by high
temperatures, dirt and humidity which are present in the environment.
The unit, which is basically made up of a sealed cooling circuit where the refrigerant circulates, is
divided into two sections, where the air in the environment and the air in the cabinet are treated
without coming into contact with each other during cooling mode.
The system operates as follows:
The compressor compresses the refrigerant gas bringing it to a high pressure and temperature.
The hot gas, by going through the condenser, is cooled and liquefied thus releasing heat to the air
in the environment. Pushed through the thermal expansion valve, the liquid refrigerant loses pressure,
which makes it prone to evaporation. This takes place in the evaporator, where the refrigerant
absorbs the heat of the warm air from the cabinet, which is therefore cooled.
LP switch
Filter dryer
Liquid receiver
Condenser
pressure switch
valve for
filling
valve for
filling
Valve
Valve
Valve Valve
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