Daikin SUPER MULTI NX G Series, Руководство по обслуживанию

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SiUS12-928 Outdoor Unit – 2MXS18GVJU
Removal Procedure 178

Before working, make sure
that the refrigerant is empty
in the circuit.

Be sure to apply nitrogen
replacement when heating
up the brazed part.
Warning
Be careful not burn yourself
with pipes and other parts that
are heated by the gas brazing
machine.
Warning
If the refrigerant gas leaks
during work, ventilate the
room. (If the refrigerant gas is
exposed to flames, toxic gas
may be generated.)
Since it may happen that the
refrigerant oil in the
compressor catches fire,
prepare wet cloth so as to
extinguish fire immediately.
Caution
For global environment
protection, do not discharge
the refrigerant gas in the
atmosphere. Make sure to
collect all the refrigerant gas.
Cautions for restoration
1. Restore the piping by non-
oxidation brazing.
2. It is required to prevent the
carbonization of the oil inside
the four way valve and the
deterioration of the gaskets
affected by heat. Keep below
120°C (248°F).Wrap the four-
way valve with a wet cloth and
provide water so that the cloth
does not dry out and
excessive heating is avoided.
In case of difficulty with gas
brazing machine
1. Disconnect the brazed part
where it is easy to disconnect
and restore.
2. Cut pipes on the main unit
with a tube cutter in order to
make it easy to disconnect.
5 Disconnect the brazed
part (a) at discharge side
of the compressor.
6
7
Disconnect the brazed
part (b) at suction side of
the compressor.
Lift the compressor up
and remove it.
Note:

Do not use a metal
saw for cutting pipes
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.
Be careful so as not to
burn the compressor
terminals, the name
plate, the heat exchanger
fin.
Step Procedure Points
.
.