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Midea M thermal A Mono Series User Manual

Midea M thermal A Mono Series
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M thermal Mono
8 202008
Midea M thermal Mono
Service Manual
Key components:
1. Accumulator:
Stores liquid refrigerant and oil to protect compressor from liquid hammering.
2. Electronic expansion valve (EXV):
Controls refrigerant flow and reduces refrigerant pressure.
3. Four-way valve:
Controls refrigerant flow direction. Closed in cooling mode and open in heating mode. When closed, the air side heat
exchanger functions as a condenser and water side heat exchanger functions as an evaporator; when open, the air
side heat exchanger functions as an evaporator and water side heat exchanger function as a condenser.
4. High and low pressure switches:
Regulate refrigerant system pressure. When refrigerant system pressure rises above the upper limit or falls below the
lower limit, the high or low pressure switches turn off, stopping the compressor.
5. Air purge valve:
Automatically removes air from the water circuit.
6. Safety valve:
Prevents excessive water pressure by opening at 43.5 psi (3 bar) and discharging water from the water circuit.
7. Expansion vessel:
Balances water system pressure. (Expansion vessel volume: 8L in 18/22/26/30kW units)
8. Water flow switch:
Detects water flow rate to protect compressor and water pump in the event of insufficient water flow.
9. Manometer:
Provides water circuit pressure readout.
10. Water pump:
Circulates water in the water circuit.
Midea CAC
Confidential

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Midea M thermal A Mono Series Specifications

General IconGeneral
BrandMidea
ModelM thermal A Mono Series
CategoryAir Conditioner
LanguageEnglish

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