HXY48TAVJU
VRV System indoor unit
3P616151-1A – 2021.12
Installation and operation manual
17
7.4.
Finishing the indoor unit installation
7.4.1.
To fix the user interface cover to the indoor unit
1
Make sure that the front panel is removed from the indoor unit.
See To open the indoor unit.
2
Plug the hinges into the backside of the front panel.
3
Plug the user interface cover into the hinges.
4
Mount the front panel to the indoor unit.
7.4.2.
To close the indoor unit
1
Close the switch box cover.
2
Install the front panel as shown below.
8.
Commissioning
8.1.
Pre-operation checks
After the installation of the unit, check the following:
1
Field wiring
Make sure that the field wiring has been carried out according to
the instructions described in the chapter "6.3. Preparing
electrical wiring" on page 10, according to the wiring diagrams
and according to the relevant local, state, and national
regulations.
2
Fuses and protection devices
Check that the fuses and other locally installed protection
devices are meeting the size specified in Serial label (MCA/MOP
etc) and Field wiring on page 11.
Be sure that neither a fuse nor a protection device has been
bypassed.
3
Ground wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
4
Internal wiring
Visually check the switch box and the inside of the unit on loose
connections or damaged electrical components.
5
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
6
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
7
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak try to repair the leak (recovery, repair, and
vacuuming needed). If it is impossible to repair by yourself, call
your local dealer.
Do not touch any refrigerant which has leaked out of refrigerant
piping connections.
This may result in frostbite.
8
Vacuuming/recovery and refrigerant charging
Refer to the outdoor unit manual for more details.
9
Water leak
Check the inside of the unit on water leakage. In case there is a
water leakage try to repair the leak. If it is impossible to repair by
yourself, close the water inlet and water outlet shut-off valves
and call your local dealer.
10
Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
11
Air purge valve
Make sure the air purge valve of the heat pump is open (at least
2 turns).
12
Shut-off valves
Make sure that the shut-off valves are correctly installed and
fully open.
NOTE
When closing the indoor unit cover, make sure that the
tightening torque does NOT exceed 3 lbf-ft (4.1 Nm).
NOTE
Be careful NOT to pinch the wiring when attaching the
frontplate to the unit.
2x
1
2
NOTE
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
WARNING
Switch off the power supply before making any
connections.
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