16
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Piping installation
Installer and user reference guide
76
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
NOTICE
Precautions when making knockout holes:
▪
Avoid damaging the casing.
▪
After making the knockout holes, we recommend you remove the burrs and paint
the edges and areas around the edges using repair paint to prevent rusting.
▪
When passing electrical wiring through the knockout holes, wrap the wiring with
protective tape to prevent damage.
4
Connect piping (by brazing) as follows:
8 HP
5 HP
d
c
c
d
b
a
b
a
3 1
2
3
2
1
a
Liquid line (circuit 1: to heat exchanger unit)
b
Gas line (circuit 1: to heat exchanger unit)
c
Gas line (circuit 2: to indoor units)
d
Liquid line (circuit 2: to indoor units)
1
Pinched piping
2
Piping accessory
3
Field piping
5
Reattach the service cover.
6
Seal all gaps (example: a) to prevent small animals from entering the system.
a
a
a
a
WARNING
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
16.2.8 To connect the refrigerant piping to the heat exchanger unit
1
Remove the cover.
2
Remove the 2 insulation pieces.
