ESIE16-02B | Part 1. Introduction 1.3. General operation
4/04/17 | Version 1.0 Page 13
RA R32 Split & multi split M-Series
1.3. General operation
• These split units are used for comfort cooling and are equipped with an inverter.
• 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.
• 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.
• Tc (condensing temperature) is used in heating mode.
• Te (evaporation temperature) is used if any indoor unit operates in cooling mode.
• The evaporating temperature in the heat exchanger is controlled by the electronic expansion valve.
• When indoor unit is selecting heating mode, discharge gas is supplied by the outdoor unit to the indoor unit.
• 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
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