Gree GRS-Cm28/NaA-M - Page 77

Chapter Ⅳ Maintenance（3. Maintenance of Key Parts）
75
3.2.1.6 Strainer
Removal/ Installation of strainer
Remarks: Check the refrigerant system and each circuit. After making sure that it is
necessary to replace the filter, disconnect power and reclaim the refrigerant.
Step
Figure
Operation Instructions
1、
Reclaim the
refrigerant.
● Disconnect power
of the unit;
● Reclaim the
refrigerant.
2、
Remove the
strainer.
● In order to protect
the EXV, wrap it with
wet cloth during
welding;
● Remove the filter by
using the soldering
gun.
3、
Replace with
a new filter.
● Replace with a new
filter that is of the
same model;
● Wrap the EXV with
wet cloth and mount
teh filter on. Connect
the connection pipe;
● Weld it with
soldering gun;
● Note: Add nitrogen
into the pipe when
welding.
4、Retain
system
pressure,
vacuumize
and recharge
refrigerant.
——
● Detect system
leakage;
● Make sure the
vacuum degree
reaches -1.0bar;
● Type and amount of
refrigerant should
accord with
requirements on unit‟s
nameplate.