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7
8
10
1
2
2
11
4x
12
13
7.1.2.
To install the drainpan kit
If a drain pan kit is required, install it before connecting the refrigerant
and water pipes and the electrical wiring.
To install, see the installation manual of the drain pan kit.
7.1.3.
To connect the refrigerant piping to the outdoor unit
a Refrigerant liquid connection Ø3/8 inch (9.52 mm)
b Refrigerant gas connection Ø5/8 inch (15.9 mm)
1
Connect the liquid piping from the outdoor unit to the refrigerant
liquid connection of the indoor unit.
2
Connect the gas piping from the outdoor unit to the refrigerant
gas connection of the indoor unit.
Installation and operation manual
12
2x
2x
9
2
b
a
For details concerning vacuuming and operating the unit during
vacuuming, see installation manual of outdoor unit.
For details concerning piping sizes and refnet selection, see
installation manual of the outdoor unit.
NOTE
Do NOT put power on the unit before vacuuming is
completed. In case this happened, refer to the instructions
in the installation manual of the outdoor unit to avoid dirt,
air or nitrogen to be trapped in the piping.
7.2.
Connecting the water piping
7.2.1.
To connect the water piping
NOTE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.
To facilitate service and maintenance, 2 shut-off valves are provided.
Mount the valves on the water inlet and on the water outlet. Mind their
position. Orientation of the integrated drain valves is important for
servicing.
1
Install the shut-off valves on the water pipes.
c
b
a Water inlet
b Water outlet
c Adaptors
2
Screw the indoor unit nuts on the shut-off valves.
3
Clean male and female threads.
4
Make sure all thread surfaces are dry and free of debris.
5
Apply an appropriate sealant material (i.e. Loctite, Teflon tape)
to the threads.
The sealant material be fully and continuously applied in the
groove of the threads, 360° around male threads.
6
Screw the adaptors on the shut-off valves.
7
Connect the field piping on the adaptors.
8
Assemble parts wrench tight. Do NOT overtighten, as this may
deform the female portion of the connection.
NOTE
It is recommended to install a pressure reducing valve on
the cold water inlet in accordance with the applicable
legislation.
c
a
HXY48TAVJU
VRV System indoor unit
3P616151-1A – 2021.12
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