Chapter Ⅳ Maintenance（3. Maintenance of Key Parts）
71
2、Take off
the fixing nuts of
tube in tube
condenser and
then remove the
tube in tube
condenser.
● Take off the fixing nuts
by using a spanner or
other tools;
● Remove the tube in
tube condenser from the
base plate.
3、Replace
with a new tube
in tube
condenser and
then secure the
nuts.
● Install the new tube in
tube condenser on the
base plate;
● Use a spanner to
tighten up the fixing nuts
of tube in tube
condenser;
● Weld the fluorine
connection pipe and
tighten the waterway
conenction pipe.
4 、 Reclam
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.
3.2.1.4 Electronic expansion valve
Removal/ Installation of electronic expansion valve
Remarks: Check the refrigerant system and each circuit. After making sure that it is necessary
to replace electronic expansion valve, disconnect power and reclaim the refrigerant.
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