Outdoor Unit SiUS04-924
Removal Procedure 181
4
Heat up the brazed part
and withdraw the piping
with pliers.
Caution
Be careful not to get yourself
burned with the pipes and
other parts that are heated by
the gas welding rod.
Caution
From the viewpoint of global
environment protection, do not
discharge the refrigerant gas
into the atmosphere. Make
sure to recover the refrigerant
gas with a recovery system.
Reassembly precautions
1. Use non-oxidizing brazing
method. If nitrogen gas is not
available, braze the parts
speedily.
2. Avoid deterioration of the
gaskets due to carbonization
of oil inside the four-way
valve or thermal influence.
For this purpose, wrap the
four-way valve with wet cloth.
Splash water over the cloth
against becoming too hot
(keep it below 120°C).
In pulling the pipes, be careful
not to over-tighten them with
pliers. The pipes may get
deformed.
If the gas welding machine fails
to remove the four-way valve,
take the steps below.
1. Disconnect the brazed pipe
sections that are readily easy
to separate and join together
later.
2. With a small copper tube
cutter, cut off the internal
pipes to easily take out the
four-way valve.
Note:
Never use a metal saw. The
sawdust may enter into the
circuit.
Provide a protective sheet or
a steel plate so that the
brazing flame cannot
influence peripheries.
Be careful not to break the
pipes by pressing them
excessively with pliers when
withdrawing it.
Before working, make sure
that the refrigerant circuit is
empty.
Be sure to apply nitrogen
replacement when heating
up the brazed part.
Warning
If refrigerant gas leaks
during the job,
ventilate the room.
(Bear in mind that if
the refrigerant gas is
exposed to open
flames, noxious gas
may be generated.)
5
Remove the 3 screws.
Step Procedure Points
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