Removal Of The Four Way Valve - Daikin Altherma EKHBH Series Service Manual

ESIE06-03
2.7

Removal of the Four Way Valve

Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure
Step Procedure
1 Loosen the screw of the
four way valve coil.
2 Heat up the brazed part
of the four way valve
and disconnect.
Be sure to apply
nitrogen
replacement when
heating up the
brazed part.
3 Heat up every brazed
part in turn and
disconnect.
Part 5 – Disassembly and Maintenance
Four way
valve
Removal procedure: outdoor unit ERYQ005~007AAV3
Points
Provide a protective sheet or a
steel plate so that the brazing flame
Four way
cannot influence peripheries.
valve coil
Be careful so as not to break the
pipes by pressing it excessively by
pliers when withdrawing it.
Caution
Be careful about the four way valve,
pipes and so on, which were heated
up by a gas brazing machine, so as
not to get burnt your hands.
Cautions for restoration
Restore the piping by
non-oxidation brazing. Braze it
quickly when no nitrogen gas can
be used.
It is required to prevent the
carbonization of the oil inside the
four way valve and the
deterioration of the gaskets
affected by heat. For the sake of
this, wrap the four way valve with
wet cloth and provide water so that
the cloth will not be dried and avoid
excessive heating (keep below
120°C).
In case of the difficulty with gas
brazing machine
Disconnect the brazed part where
is easy to disconnect and restore.
Cut pipes on the main unit by a
miniature copper tube cutter in
order to make it easy to disconnect.
Note
Do not use a metal saw for cutting
pipes by all means because the
sawdust come into the circuit.
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