Installation and operation manual
14
125A7V1B
VRV IV System indoor unit
4P325971-1B – 2012.07
7.3.
Connecting the electrical wiring
7.3.1.
Precautions on electrical wiring work
7.3.2.
System overview of field wiring
Field wiring consists out of power supply, indoor-outdoor
communication (= transmission F1F2) wiring, wiring of the user
interface (=P1P2), wiring for connection of options and field supply
accessories.
7.3.3.
Requirements
A power supply (refer to the table mentioned in
"6.3.2. Overview of
electrical connections on the indoor unit" on page 11
) must be
provided for connection of the unit. The power supply must be
protected with the required safety devices, i.e. a main switch, a slow
blow fuse on each phase and an earth leakage protector in
accordance with applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table
"6.3.2. Overview of electrical connections on the indoor unit" on
page 11
.
7.3.4.
To open the switch box cover
7.3.5.
To connect the electrical wiring on the indoor unit
1
Wiring should enter the unit from the bottom.
2
Routing of the wiring inside the unit and switchbox should be as
follows:
WARNING: Electrical Installation
All field wiring and components must be installed by an
installer and must comply with the applicable legislation.
NOTICE
Electrical wiring work recommendations.
To persons in charge of electrical wiring work.
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
WARNING
A main switch or other means for disconnection,
having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with the
applicable legislation.
Use only copper wires.
All field wiring must be carried out in accordance with
the wiring diagram supplied with the unit and the
instructions given below.
Never squeeze bundled cables and be sure that it
does not come in contact with the non-insulated
piping and sharp edges. Be sure no external pressure
is applied to the terminal connections.
Power supply wires must be attached securely.
Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
Be sure to install an earth leakage protector in
accordance with the applicable legislation. Failure to
do so may cause electric shock or fire.
Be sure to use a dedicated power circuit, never use a
power supply shared by another appliance.
Be sure to install the required fuses or circuit
breakers.
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc....
In extreme circumstances you shall keep distances of 3m
or more and use conduit tubes for power and transmission
lines.
INFORMATION
More information about the legend and the location of the
wiring diagram of the unit can be found in
"14.2. Wiring
diagram" on page 41
.
The Wiring diagram on the indoor unit is only for the indoor
unit.
For the outdoor unit refer to the wiring diagram of the
outdoor unit.
NOTICE
Check the table in
"6.3.2. Overview of electrical
connections on the indoor unit" on page 11
to know which
wiring should be routed in the high voltage cable bundle
and which wiring should be routed in the low voltage cable
bundle.
4x
a
b
