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ESIE16-02K
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Part 1. Introduction
1.3. General operation
Page 14
31/05/21
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Version 1.0
RA R32 Split & multi split M-Series
1.3. General operation
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The Multi Split is typically used for cooling or heating in residential applications. The medium which is used to transfer the heat
from inside to outside or vice versa, is refrigerant R32.
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In case of cooling, the compressor builds up pressure and hence the temperature of the refrigerant is increased. The hot
refrigerant is carried to the outdoor heat exchanger which will cool down the hot refrigerant by fan. The temperature of
refrigerant is further decreased by expansion through expansion valve(s). The cold refrigerant flows into the indoor unit(s) and
are capable of taking up heat again. This is enabled by a fan that sucks indoor air over heat exchanger(s). This refrigerant is
then transported to the compressor where temperature is further built up again and the cycle starts again. For heating, it's just
the other way round.
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Each indoor unit has its own dedicated expansion valve to control the amount of the refrigerant flow going into their heat
exchangers. This is defined by their own parameters (Setpoint, air temperature…etc).
1. Compressor
4. Outdoor heat exchanger
2. Indoor heat exchanger (From 2 to 5)
5. 4-way valve
3. Expansion valve (From 2 to 5)
6. Stop valves
6
3
3
3
2
2
2
6
5
1
4