PIPE CONNECTIONS BETWEEN INDOOR/OUTDOOR UNITS
ENGLISH
35
Preparation Work for Outdoor Unit
Remove leakage prevention cap
- Remove the leakage prevention cap attached to the outdoor unit service valve before piping
work.
- Proceed the leakage prevention cap removal as follows.
1. Verify whether the liquid/gas pipes are locked.
2. Extract (discharge) any remaining refrigerant or air inside using the service port.
3. Remove the leakage prevention cap.
Perform the gas pipe/liquid pipe connection as follows.
- Gas pipe/liquid pipe and common pipes should be purchased locally.
- Wrap wet towel when welding. Otherwise, it may result in internal damages.
- After welding the elbow and the straight pipe, insert the panel into the pipe and keep welding
the connected pipes. Insert the pipe in the center of the panel hole.
- You must run nitrogen at 20 kPa through the inside piping while welding.
- Otherwise, a large amount of oxide coating will form inside the piping, which may affect the
functioning of a valve or a compressor etc.
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