ESIE16-02B
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Part 1. Introduction
1.3. General operation
4/04/17
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Version 1.0
Page 13
RA R32 Split & multi split M-Series
1.3. General operation
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These split units are used for comfort cooling and are equipped with an inverter.
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The rotation speed rps (= rotation per second) of the inverter driven compressor, modulated by the inverter, can be varied
according the required capacity in the room.
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The compressor capacity step is changed in order to reach target compression ratio. The target compression ratio is calculated
from deviation between actual and target condensation and evaporation temperature.
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Tc (condensing temperature) is used in heating mode.
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Te (evaporation temperature) is used if any indoor unit operates in cooling mode.
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The evaporating temperature in the heat exchanger is controlled by the electronic expansion valve.
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When indoor unit is selecting heating mode, discharge gas is supplied by the outdoor unit to the indoor unit.
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When indoor unit is selecting cooling mode, liquid refrigerant is supplied by the outdoor unit to the indoor unit.
1. Compressor
4. Outdoor heat exchanger
2. Indoor heat exchanger
5. 4-way valve
3. Expansion valve
6. Stop valves