Midea MTA-76C(H)RN1 Technical Manual page 79

MCAC-UTSM-201501

The refrigerant pipe adapter is located inside the outdoor unit. So remove the right front board
first, totally three pieces of M5 screw.

When the pipe is connected from the front side, the pipe can be led out through the right front
board.

When welding the refrigerant pipe, in order to prevent internal oxidation of the pipe, nitrogen
must be filled in. Otherwise, the oxidized chips may block refrigerating circulatory system.

Trash and foreign matters may come into the pipe in the process of installing the refrigerant pipe.
Be sure to blow them off with nitrogen before connecting the pipe to the outdoor units.

Use high-pressure nitrogen to clean the pipelines. Do not use the refrigerant of the outdoor unit
for cleaning.

Pipes size of the units:

For 44kW duct unit, the indoor unit and outdoor unit are categorized in system A and B. When
installing and connecting the indoor unit and outdoor unit, identify the label carefully, and make
sure that indoor unit corresponds to the outdoor unit, exactly. Otherwise, it may lead to fault of
the air conditioner.
MFA-76C(H)RN1 + MOV-76C(H)N1-C
MFA-96C(H)RN1 + MOV-96C(H)N1-C
Capacity Liquid pipe
Φ9.52mm
22 kW
Φ9.52mm
28 kW
Φ12.7mm
35 kW
Φ9.52mm
44 kW
Midea R410A T3 Top-discharge Split Type Series 50Hz
Gas pipe
Φ22mm
Φ25mm
Φ28.6mm
Φ22mm
Set
1
1
1
2
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