Daikin Super Multi NX B series, Руководство по обслуживанию, Страница: 250 / 302

Si12-308 Outdoor Unit (80 / 90 Class)
Removal Procedure 239
„
Before taking this
procedure, make sure
there is no refrigerant gas
left in the refrigerant
pipes. Reassembling 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 hack saw. The
sawdust may come into the
circuit.
2
3
Place welding
protective sheet or iron
plate around the four
way valve to prevent
the flames of a gas
welding rod from
affecting the valve.
Heat the 4 brazed
points of the four way
valve. Disconnect the
point (a) first.
4 Disconnect the points
(b) and (c).
5
Disconnect the point
(d).
Step Procedure Points