Midea MFM-24ARN1-Q Service Manual page 20

Floor Standing MFM
pipe(roll it with soft band after bent).
b. To avoid pipe deformation, the radius is the bigger the better.
c. Use a pipe-bending device to make the compact bending pipe.
6.3.2.2 Using bronze pipe selling in market
Completely shut the cut-off valves of the outdoor unit (as ex-work status). After the refrigerant
pipe has been connected with both the indoor and outdoor unit, let the air exhaust out from the
maintenance gap on the low-pressure cut-off valves of the outdoor unit. Screw the nuts tightly on
the maintenance gap after the air has been drained.
6.3.2.3 To make the refrigerant pipe unblocked completely
You should keep the cut-off valves of the outdoor unit completely open after you have finished the
above steps (5.3.2.1 or 5.3.2.2)
Note:
1.Before screwing the reamer nut, smear the pipe and the connecting surface with refrigerant oil;
2.Check and make sure there is no leakage by soap-water or leakage-checker after connecting;
3.Be sure the connecting joint on the indoor side is insulated.
4.Use two wrenches to connecting the pipes.
Outside diameter
mm
Ф9.52
Ф12.7
Ф16
Ф19
6.3.3 Installation for the first time
Air and moisture in the refrigerant system have undesirable effects as below:
● Pressure in the system rises.
Service manual
Torque
inch N.cm
3/8 3270
1/2 4950
5/8 6180
3/4 9720
DM16-01.01.25en
Additional
tightening
torque
N.cm
3990
6030
7750
11860
20