DC INVERTER U-MATCH AIR CONDITION MAINTENANCE
149
2.Remove the solenoid valve
●Remove the solenoid valve
from 4-way valve.
3. Remove the 4-way valve
● Use gas welding to heat
the pipes connected on the
four openings of 4-way valve.
Then, pull them out from
4-way valve.
● Before welding 4-way
valve, please record the
orientation of 4-way valve
and installing position of
each opening.
4. Remove 4-way valve
● Remove the old 4-way
valve from the pipe.
5. Connect the new 4-way
valve to the pipe.
● Install the new 4-way valve
to correct position.
● When welding the 4-way
valve, please wrap the valve
body with wet cloth, thus to
prevent the guide inside the
valve body from burn. Also
take care to prevent any
water from flowing into the
pipe.
● Weld by charging nitrogen,
with the nitrogen pressure
kept at 0.5±0.1kgf/c
(relative pressure).
Remove connecting
pipes at E,S,D and C
openings of 4-way
valve
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