13 Piping installation
Installation and operation manual
27
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1A – 2020.01
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
▪ Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel. Especially
for the bottom and side connection, be sure to protect
the piping with suitable insulation, to prevent it from
coming into contact with the casing.
1
Do the following:
▪ Remove the service cover (a) with screw (b).
▪ Remove the piping intake plate (c) with screws (d).
a
c
b
d
d
2
Choose a piping route (a, b, c or d).
a
d
b
c
a
Front
b
Side
c
Rear
d
Bottom
INFORMATION
b
b
b
b
a
a
▪ Remove the knockout hole (a) in the bottom plate or
cover plate by tapping on the attachment points with a
flat head screwdriver and a hammer.
▪ Optionally, cut out the slits (b) with a metal saw.
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing and underlying piping.
▪ After making the knockout holes, we recommend to
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.
3
Do the following:
▪ Connect the accessory liquid pipe (a) to the liquid stop valve
(brazing).
▪ Connect the accessory gas pipe (b) to the gas stop valve
(brazing).
a
b
NOTICE
When brazing:
First braze the liquid side piping, then the
gas side piping. Enter the filler rod from the front of the unit
and the brazing torch from the right side to braze with the
flame pointing outside. Avoid heating the compressor
sound insulation and other piping.
Wrap both stop valves in a wet cloth in order to protect the
valve internals from overheating.
a b
c
a
b f g
c
d
e
A
A
a
Filler rod
b
Fire resistant plate
c
Torch
d
Flame
e
Compressor sound insulation
f
Liquid side piping
g
Gas side piping
4
Connect the field piping to the accessory pipes using the
accessory bend pipes (brazing). Mind the orientation of the
bends.
NOTICE
Always protect the surrounding surfaces (e.g. wiring,
insulation foam, …) from heat when brazing.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
13.2.3
To connect the refrigerant branching kit
For installation of the refrigerant branching kit, refer to the installation
manual delivered with the kit.
