Daikin VRV 5 - To Insulate the Refrigerant Piping

18 | Piping installation
Installer and user reference guide
106
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
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:
g
b
a
f
e
cd
a Gas pipe
b Gas pipe insulation
c Interconnection cable
d Field wiring (if applicable)
e Liquid pipe
f Liquid pipe insulation
g Finishing tape
2 Install the service cover.
Inside the outdoor unit
To insulate the refrigerant piping, proceed as follows:
a
b
a Insulation material
b Caulking etc.
1 Insulate the liquid and gas piping.
2 Wind heat insulation around the curves, and then cover it with vinyl tape.
3 Make sure the field piping does not touch any compressor components.
4 Seal the insulation ends (sealant etc.) (b, see above).
5 Where necessary, wrap the field piping with vinyl tape to protect the
insulation against sharp edges.
6 If the outdoor unit is installed above the indoor unit, cover the stop valves
with sealing material to prevent condensed water on the stop valves from
moving to the indoor unit.