INVENTOR u-match on/off, Service Manual

Page: 136 / 163

U-MATCH AIR CONDITIONERS MAINTENANCE
133
5. Assembly of New
4-way valve
Position accurately the
new 4-way valve.
Connect new 4-way valve
with pipe line.
Wrap the valve with wet
cloth when welding 4-way
valve in case sliding block
inside the valve should be
burnt and water flow into
the pipe line.
Welding with nitrogen and
the nitrogen pressure shall
be 0.5±0.1kgf/c
΃
(relative
pressure).
6. Assembly of solenoid
valve
Assemble solenoid valve
onto the new 4-way valve in
order of disassembly.
7. Examination of System
and cooling medium
filling
Pump vacuum and fill
cooling medium if the
system leak test passes.
Assemble
solenoid valve
and fix it
Mount the new 4-way
valve and weld the
joints with other
pipelines.