Removal Of Four Way Valve - Daikin Super Multi NX FFQ25B8V1B Service Manual

Outdoor Unit - 50~75 Class
1.8

Removal of Four Way Valve

Procedure
Step
Before working, make
sure that the refrigerant
gas is empty in the circuit.
Be sure to apply nitrogen
replacement when
heating up the brazed
part.
Remove the 1 screw to
1
remove the four way
valve coil.
2 Heat up the 4 brazed
part of the four way
valve. First, disconnect
the part (a).
3 Disconnect the part (b).
4 Disconnect the part (c)
and (d) and remove the
four way valve.
Note:
Do not use a metal saw
for cutting pipes by all
means because the
sawdust comes into the
circuit.
When withdrawing the
pipes, be careful not to
pinch them firmly with
pliers. The pipes may get
deformed.
Provide a protective sheet
or a steel plate so that the
brazing flame cannot
influence peripheries.
398
Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Procedure
Be careful not to get yourself
burnt with the pipes and other
Four way
valve coil
parts that are heated by the
gas brazing machine.
If the refrigerant gas leaks
during work, ventilate the
room. (If the refrigerant gas is
exposed to flames, toxic gas
(R5589)
may be generated.)
From the viewpoint of global
environment protection, do
not discharge the refrigerant
gas in the atmosphere. Make
sure to collect all the
refrigerant gas.
(a)
Cautions for restoration
1. Restore the piping by non-
2. It is required to prevent the
(b)
In case of difficulty with gas
brazing machine
1. Disconnect the brazed part
(c)
2. Cut pipes on the main unit
(d)
SiBE121021_C
Points
Warning
Warning
Caution
oxidation brazing.
carbonization of the oil inside
the four way valve and the
deterioration of the gaskets
affected by heat. (Keep
below 120°C.) For the sake
of this, wrap the four way
valve with wet cloth and
provide water so that the
cloth does not dry.
where is easy to disconnect
and restore.
with a tube cutter in order to
make it easy to disconnect.
Removal Procedure