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• During the cooling mode operation under low ambient pressure,
the low pressure side of the valve can be prone to freezing.
Secure the flare nut. (shared gas side / liquid side) section of the
valve with a silicone sealing agent to prevent this from occurring.
Precautions for handling the cover
• Ensure not to scratch the inner surface of the
valve or the end of the valve shaft.
• Once adjustments to the valve are
completed, ensure to tighten the valve cap
according to the prescribed torque.
Valve size Tightening torque
ø9.52
20.6N•m~28.4N•m
(2.1kgf•m~2.8kgf•m)
ø15.88
48.0N•m~59.8N•m
(4.8kgf•m~6.0kgf•m)
Precautions for handling the service ports
• Use a push-rod with a charge hose.
• Once adjustments to the valve are
completed, ensure to tighten the valve cap
according to the prescribed torque.
Tightening torque
10.7N•m~14.7N•m
(1.1kgf•m~1.5kgf•m)
Precautions for connecting the pipes
• Ensure that the pipes do not come into contact with the
compressor’s bolts or exterior panel.
• There is a risk of condensation from the 3-way valve coming out
between the insulation material and the indoor unit’s piping when
you install the outdoor unit above then the indoor unit. Ensure to
caulk the connection parts.
• Perform all the necessary checks on the main piping connections.
• Ensure to use the branch pipe unit to diverge the refrigerant piping. (Option parts No.: CZ-P155BK1).
1. Install the branch pipe on a horizontal and vertical plane. (Maximum slant angle: within 15°)
2. Ensure that the pipe length between the branch pipe and each indoor unit as short as possible.
3. Port connections should be soldered with dry nitrogen gas to prevent oxidation of copper on the inner
surface.
Refer to the installation instruction manual for the details on the branch piping.
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