Fujitsu AO*G09KXCA Series, Инструкция по эксплуатации

Страница: 109 / 110

Before servicing the unit, turnings of all power supplies.
Then, do not touch the electric parts for 10 minutes due to the risk of electric shock.
EXPANSION VALVE
4WAY VALVE
3WAY VALVE (GAS)
2WAY VALVE (LIQUID)
HIGH PRESSURE SWITCH
(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 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 the fire-retardant board when the flame seems to hit the following parts 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
Allowable
temperature
Precautions in work
Remove the coil before brazing.
And install the coil after brazing.
Detaching necessity Sensor.
Remove the suction temp. sensor before brazing.
And install the suction temp. sensor after brazing.
120°C
120°C
100°C
100°C
11. Precautions for exchange of refrigerant-cycle-parts
Procedure for compressor installation.
Reverse procedure to removing the compressor.
Precautions for compressor installation.
(1) When welding, do not apply the flame to the terminal.
(2) When welding, be sure to replace the air in the pipe with nitorogen gas to
prevent forming oxidization scale.
04-19