6 Installation
Installer and user reference guide
15
FCAHG71~140FVEB
Split system air conditioners
4P429475-1 – 2015.12
6.4
Connecting the electrical wiring
6.4.1
About connecting the electrical wiring
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1
Making sure the power supply system complies with the
electrical specifications of the units.
2
Connecting the electrical wiring to the outdoor unit.
3
Connecting the electrical wiring to the indoor unit.
4
Connecting the main power supply.
6.4.2
Precautions when connecting the
electrical wiring
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF ELECTROCUTION
INFORMATION
More information about the legend and the location of the
wiring diagram of the unit can be found in the "Technical
data" chapter.
WARNING
ALWAYS use multicore cable for power supply cables.
6.4.3
Guidelines when connecting the electrical
wiring
Keep the following in mind:
▪ If stranded conductor wires are being used, install a round crimp-
style terminal on the tip. Place the round crimp-style terminal on
the wire up to the covered part and fasten the terminal with the
appropriate tool.
b
a
a
Stranded conductor wire
b
Round crimp-style terminal
▪ Use the following methods for installing wires:
Wire type
Installation method
Single core wire
c b
c
a
a
A
AA´
A´
a
Curled single core wire
b
Screw
c
Flat washer
Wire type
Installation method
Stranded conductor
wire with round
crimp-style terminal
c b
b
a
c
a
B
B
a
Terminal
b
Screw
c
Flat washer
Tightening torques
Wiring
Screw size
Tightening torque
(N•m)
Interconnection
cable
(indoor↔outdoor)
M4
1.18~1.44
User interface cable
M3.5
0.79~0.97
6.4.4
Specifications of standard wiring
components
Component
Specification
Interconnection cable
(indoor↔outdoor)
Minimum cable section of
2.5 mm² and applicable for
230 V
User interface cable
Vinyl cords with 0.75 to
1.25 mm² sheath or cables
(2‑core wires)
Maximum 500 m
6.4.5
To connect the electrical wiring on the
indoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ For instructions on how to connect the decoration panel
and the sensor kit, see the wiring instruction sheet
(delivered with the unit, inside the accessory bag).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wiring should always be at
least 50 mm.
NOTICE
Be sure to keep the power line and transmission line apart
from each other. Transmission wiring and power supply
wiring may cross, but may not run parallel.
1
Remove the service cover.
2
User interface cable
: Route the cable through the frame,
connect the cable to the terminal block, and fix the cable with a
cable tie.
3
Interconnection cable
(indoor↔outdoor): Route the cable
through the frame, connect the cable to the terminal block
(make sure the numbers match with the numbers on the
outdoor unit, and connect the earth wire), and fix the cable with
a cable tie.
4
Divide the small sealing (accessory) and wrap them around the
cables to prevent water from entering the unit. Seal all gaps to
prevent small animals from entering the system.
