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Piping installation
Installer and user reference guide
87
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
16.5 Insulating the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be insulated. Take
into account the following points:
▪
Be sure to insulate the liquid and gas piping (for all units).
▪
Use heat resistant polyethylene foam which can withstand a temperature of 70°C
for:
-
all liquid piping at both the air conditioner and the refrigeration side.
-
gas piping at the refrigeration side.
▪
Use heat resistant polyethylene foam which can withstand a temperature of
120°C for gas piping at the air conditioner side.
Insulation thickness
Take the following into account when determining the insulation thickness:
Piping
Mode
Minimum temperature
during operation
Liquid piping
Refrigeration
0°C
Air conditioner
20°C
Gas piping
Refrigeration
–20°C
Air conditioner
0°C
Depending on your local weather conditions, you may need to increase the
thickness of the insulation. If the ambient temperature exceeds 30°C and the
humidity exceeds 80%.
▪
Increase the thickness of the liquid piping with ≥5 mm.
▪
Increase the thickness of the gas piping with ≥20 mm.
Insulation sealing
To prevent rain and condensed water entering the unit, add a sealing between the
insulation and the front panel of the unit.
a
a
a
a
b
b
a
Sealing material
b
Front panel
