SiBE04-101
For RXD50·60·71J
Removal Procedure
143
1.5
Removal of 4-way Valve
Procedure
Warning Be sure to turn off all power supplies before disassembling work.
Step
Procedure
Points
Before taking this procedure,
make sure there is no
refrigerant gas left in the
refrigerant pipes.
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.)
Caution
Be careful not to get yourself burnt
with the 4-way valve, pipes and
other parts that are heated by the
gas welding rod.
Reassembling precautions
1. Use non-oxidizing brazing
method. If nitrogen gas is not
available, braze the parts
speedily.
2. Avoid deterioration of the
packings due to carbonization of
oil inside the 4-way valve or
thermal influence. For this
purpose, wrap the 4-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 overtighten them with
pliers. The pipes may get
deformed.
If the gas welding machine fails
to remove the 4-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 4-way valve.
Note:
Never use a hack saw. Cuttings
may come into the pipes.
Be careful not to allow flames of
a gas welding rod to affect the
parts around the 4-way valve.
To do this, place welding
protective sheets or iron plates
around.
1
Remove the screw from
the 4-way valve coil.
2
To protect the motorized
valve coil, detach it out of
position.
3
Get rid of the brazing by
heating it up at the points
(a), (b), (c) and (d) in this
order.
SiBE04-101.book Page 143 Monday, October 15, 2001 3:08 PM