Hitachi RAS-(2-6)HVNP1(E), Руководство по обслуживанию

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10 Servicing
448
SMGB0087 rev.0 - 12/2013
10.9.12 Removing reversing valve
1 Remove the service cover, the bottom service cover and the rear cover following “10.9.1 Removing service cover” and
“10.9.4 Removing the bottom service cover and rear cover” .
2 Remove the reversing valve coil according to “10.9.12 Removing reversing valve” .
3 Recover the refrigerant from check joints according to “10.9.7 Removing the compressor” .
4 Remove the reversing valve assemblies from the fixed positions (4 brazing parts and 1 flare connection).
a. Remove the reversing valve and the stop valve with cooling the valve bodies by wet cloth.
b. Perform the brazing work with attention not to burn the electrical wirings and the piping insulations.
5 Remove reversing valve from the assemblies. (4 brazing parts and 1 flare connection) At this time, perform the brazing
work with cooling the reversing valve body by wet cloth.
6
When reassembling after replacing the reversing valve, perform in the reverse procedure of removing.
a.
Run the lead wires to be located to the original position, and fix them by the plastic band.
b. Attach the crankcase heater according to
““10.9.7 Removing the compressor”
.
7 Reassemble the parts in the reverse order of removing procedures.
Brazing part
(discharge pipe)
Brazing part
(to heat exchanger)
Brazing part
(to accumulator)
Brazing part
(Gas stop valve)
Detail
4 Brazing
parts
Detail
Flare con-
nection
(SVF)
Reversing valve
Protect the valve with
wet cloth