Daikin BPMK928B42, Service Manual

Page: 330 / 410

Si18-201 For BPMK928B42 · 43
Removal Procedure 317
4 Heat up the brazed
sections of the
motorized valve. Using
pliers or the like,
disconnect the valve. 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
motorized valve or thermal
influence. For this purpose,
wrap the motorized valve
with wet cloth and 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.
"
The strainer is located inside
each motorized valve. When
replacing the motorized
valve, be sure to change its
strainer too. (Otherwise the
strainer will get burnt and out
of function.)
"
Using the outdoor liquid gas
shut-off valve, open the
indoor line.
If the gas welding machine fails
to remove the motorized 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
motorized valve.
Note:
Never use a hack saw. Cuttings
may come into the pipes.
Step Procedure Points