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30 Outside Unit
Refrigerant piping system
WARNING
When installing and moving the air conditioner to another site, be sure to make recharge refrigerant
after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.
- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after
branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the
installation pipe drawing.
WARNING
Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.
12. When connecting the refrigerant piping, make sure the service valves of the Outside Unit is completely
closed (the factory setting) and do not operate it until the refrigerant piping for the Outside and Indoor
Units has been connected, a refrigerant leakage test has been performed and the evacuation process
has been completed.
13. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film
can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant
oil.
14. Take care so that there is no thermal damage on the service valves of the outside unit.
(Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it.
3
2
1
45
6
1 Refrigerant piping 4 Taping
2 Pipe to be brazed 5 Valve
3 Nitrogen 6 Pressure-reducing valve
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