Fujitsu WPYA100LA Service Manual page 33

２ ８.SENSOR (TEMP.CIRCULAITING WATER RETURN) removal
Sensor
Remove the THERMISTOR SPRING.
Remove the SENSOR (TEMP. CIRCULAITING WATER RETURN).
２ ９.Precautions for exchange of refrigerant - cycle parts and pipes.
(1) During exchange the following parts shall be protected by wet rag and not makes the allowable temperature or more.
(2) Remove the heat insulation when there is the heat insulation near the welding place.
Move and cool it when its detaching is difficult.
(3) Cool the parts when there are parts where heat might be transmitted besides the replacement part.
(4) Interrupt the flame with fireretardant board when the flame seems to hit the following pats directly.
(5) Do not 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
EXPANSION VALVE
4WAY VALVE
Allowable
temperature
Remove the coil before brazing.
120℃ And install the coil after brazing.
Detaching necessity Sensor.
Remove the coil before brazing.
120℃
And install the coil after brazing.
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Precautions in work