Refrigerant Pipe Installation - MDV -D28Q4/N2 Installation Manual

REFRIGERANT PIPE INSTALLATION

Ventilate the air if there was any refrigerant leakage during the installation.
Leaked refrigerant will generate poisonous gas if meeting fire.
Make sure there is no refrigerant leakage after the installation.
Leaked refrigerant will generate poisonous gas if meeting fire.
Allowed Length and Drop of Pipes
Requirements are different when installing the outdoor unit, please refer to outdoor unit
installation manual for detailed information.
Material and Size of the Pipes
Three length (3m,5m,10m) of pipes are available to purchase.
Pipe Material
Size(mm)
Refrigerant Volume to Be Added
Refrigerant volume to be added is calculated according to outdoor unit installation manual (R407C).
Be sure to add refrigerant measuring by a scale.
If the added refrigerant volume is inadequate (too much or insufficient), the compressor
malfunction will be caused. Be sure to calculate the refrigerant volume carefully.
The service man should write down the piping length and the added refrigerant volume
in the nameplate, which is on the electric control box cover of outdoor unit, for
diagnosing the compressor and refrigeration circulation malfunction.
Connection of the Refrigerant Pipe
Double-span should be used when connecting the pipes.
The wrench torque follow the below table:
Pipe external diameter
F 9.5
F 19.0
Copper Pipe for Air Conditioner
Gas side
f9.53
Liquid side
CAUTION
wrench torque
24.5(2.5kgf.m)
98.8(10.0kgf.m)
!
CAUTION
f19
Added wrench torque
29.4(3.0kgf.m)
117.7(12.0kgf.m)
9