Midea MFM-24ARN1-Q Service Manual page 19

DM16-01.01.25en
vacuum the indoor unit through the maintenance port on the cut-off valves, or open the
high-pressure valve, and exhaust the air through the maintenance port on the low-pressure
valve(closed). It will take about ten seconds. Then screw tightly the maintenance port. (When
supplement the refrigerant, fill through the maintenance port of the low-pressure valves on the
outdoor unit ).
e) Open all the valves completely before power on the system, or it will be sick for low efficiency.
f) Gas leak check. Make sure no gas from connections with leak detector or soap water.
Caution:
A: Lo packed valve B: Hi packed valve
C and D are ends of indoor unit connection.
Caution in Handling the Packed Valve
a.Open the valve stem until it hits against the stopper. Do not try to open it further.
b. Securely tighten the valve stem cap with a spanner or the link.
Notes for the bendable pipe
a. The bendable pipe should be used on the indoor side;
b. Bend angel may not exceed 90 degrees;
c. The bend location should be made on the center of the pipe if possible, as for bend radius, the
bigger the better;
d. The bendable pipe may not be bent for more than 3 times.
Bend the thin pipe
a. While bending, expose the pipe by cutting the concave gap on the bending heat-insulation
19
Floor Standing MFM
Service manual