Midea EL-KF20GW/N2Y-A(B) Service Manual page 19

GD Midea Refrigerant Equipment Co. Ltd
3. Ensure the difference between the intake
temperature and the discharge is more than 8
4. For reference: the gas side pressure of
optimum condition is as detailed (Cooling).
Outside ambient
TEMP.
o o
35 C(95 F)
NOTE:
If the actual pressure is higher than shown, the
system is most likely overcharged, and charge
should be reduced.
If the actual pressure is lower than shown, the
system is most likely undercharged, and charge
should be added.
The air conditioner is now ready for use.
o
C.
The pressure of the
gas side service valve
2
4~5kg/cm
(400~490KPa)
Service manual for Electrolux split Series
PUMP DOWN
This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the
outdoor unit without loss of refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with
the unit in cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose
to the charge port on the gas side service valve.
2. Open the gas side service valve halfway and
purge the air from the manifold hose using the
refrigerant gas.
3. Close the liquid side service valve (all the way
in).
4. Turn on the unit's operating switch and start the
cooling operation.
5. When the low-pressure gauge reading
becomes 1 to 0.5kg/cm
the gas side valve stem and then quickly turn off
the unit.
At this time Pump Down has been completed and
all refrigerant gas will have been collected in the
outdoor unit.
18
2
(100~50kPa), fully close