INVENTOR DHW-C3.5/A1-K, Service Manual

Page: 42 / 52

HEAT PUMP WATER HEATER MAINTENANCE
40
4. Connet the pipe of 4-way
valve with system pipeline.
Weld them.
Wrap the valve with wet cloth in
case of burnt gliding block and
entering of water.
Weld the pipeline.
During welding, charge nitrogen
of 0.5±0.1kgf/cm
2
(relative
pressure).
Do not burn the other parts during
soldering.
5. Install electric magnetic coil
of 4-way valve.
Perform leak test for the welding
spot.
Tighten the fixing screw.
Disassembly and Assembly of Heat Exchanger
Remark: Make sure that there isn’t any refrigerant in pipe system and the power supply is cut off before removal
of the heat exchanger.
Step Illustration Handling Instruction
1. Solder off the heat exchnager
Wrap the inflow pipe and
outflow pipe with wet cloth.
During welding, charge
nitrogen of 0.5±0.1kgf/cm
2
(relative pressure).
2. Remove the heat exchanger
Remove the heat exchanger
carefully. Avoid hiting other pipe
or parts.