18
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Piping installation
Installer and user reference guide
103
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
18.3.6 To insulate the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be insulated. Take
into account the following points:
▪
Make sure to insulate the connection piping and refrigerant branch kits entirely.
▪
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 liquid piping and polyethylene foam which can withstand a temperature of
120°C for gas piping.
▪
Reinforce the insulation on the refrigerant piping according to the installation
environment.
Ambient temperature
Humidity
Minimum thickness
≤30°C
75% to 80% RH
15 mm
>30°C
≥80% RH
20 mm
Between outdoor and indoor unit
NOTICE
It is recommended that the refrigerant piping between indoor and outdoor unit is
installed in a ducting or the refrigerant piping is wrapped with finishing tape.
1
Insulate and fix the refrigerant piping and cables as follows:
d
b
e
a
d
a
c
f
a
Liquid pipe
b
Gas pipe
c
High pressure / low pressure gas pipe
d
Finishing tape
e
Transmission wiring (F1/F2)
f
Insulation
2
Install the service cover.
Inside the outdoor unit
To insulate the refrigerant piping, proceed as follows:
b
a
c
d
a
Sealant
b
Insulation
c
Vinyl tape around curves
d
Vinyl tape against sharp edges
3
Insulate the liquid, gas and HP/LP pipe.
