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Piping installation
Installer and user reference guide
82
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
Liquid piping
Always branch horizontally when connecting the branch piping.
To prevent uneven refrigerant flow, always branch downwards when using a
header.
a
b
a
b
a
Coming from the outdoor units
b
Going to the indoor units
Gas piping
Always branch horizontally when connecting the branch piping.
To prevent refrigerant oil flowing into the indoor units, always set the branch
piping above the main piping.
c
a
b
c
a
a
b
d
a
Coming from the indoor units
b
Going to the outdoor units
c
Main refrigerant pipe
d
Slanting downwards
NOTICE
Where joints are used on piping, avoid damage caused by freezing or vibration.
16.3.7 Guidelines to install a dryer
NOTICE
Do NOT operate the unit without a dryer installed on the liquid pipe of the
refrigeration side.
Possible consequence:
Without dryer, operating the unit may
cause a choked expansion valve, hydrolysis of the refrigerant oil and copper plating
of the compressor.
Install a dryer on the liquid piping of the refrigeration side:
Dryer type
Drops of R744 water capacity at 60°C: 200
Recommended dryer for use with transcritical CO
2
:
For LRYEN10*: CO-085-S (by Sporlan)
Where/how
Install the dryer as near as possible to the outdoor unit.
(a)
Install the dryer on the liquid pipe of the refrigeration
side.
Install the dryer horizontally.
