7 3
Precautions for exchange of refrigerant-cycle-parts
(1) During exchange the following parts shall be protected by wet rag and not make the allowable temperature or more
(2) Remove the heat insulation when there is the heat insulation near the welding place Move and cool it whan its
detaching is difficult.
(3) Cool the parts when there are parts where heat might be transmilled besides the replacement part
(4) Interrupt the flame with the fire-retardant board when the flame seems to hit the following parts directly.
(5) Do no allow moisture or debris to get inside refrigerant pipes during work
(6) When brazing, be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale.
Part name
Allowable temperature
Precautions in work
EXPANSION VALVE (MAIN)
120°C
Remove the coil before brazing.
And install the coil after brazing.
Detaching necessity sensor.
4 WAY VALVE
120°C
Remove the suction temp. sensor before
brazing.
And install the suction temp. sensor after
brazing.
2 WAY VALVE
100°C
3 WAY VALVE
PRESSURE SENSOR
100°C
Tighten the flare part gripping it. (Tightening
torque : 12+-1.5N.m)
Do the static electricity measures.
SOLENOID VALVE
200°C
Remove the coil before brazing.
And install the coil after brazing.
Maintenance document "1792 - EN"
Split system single phase type
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