Power Wiring - Carrier WTC-B-207 Installation Instructions Manual

4. Power wiring

Voltage 100-240 VAC; -15%/+10%; 50/60 Hz
Overvoltage Category II - 2.5 kV
Controllers' consumption
Consumption
Model
Typical
207 < 0.9 W + all external loads
307 < 0.9 W + all external loads
Power wiring is common to all WTC types.
A terminal block with clear marking, including
L, N, Earth symbols and colours (Grey, Blue,
Yellow/Green), is mounted inside the control
box.
CONNECTIONS - Power cable
IMPORTANT: Make the earth connection before
making any other connections.
10.5 mm - 12 mm
Power supply
To connect wires to the terminal block:
1. Insert a flat screwdriver (max. 3.5 mm) into
the terminal opening holes (it allows opening
the terminal underneath to insert cables).
The max. connection cable section is 2.5 mm².
2. Once the cable is connected, pull lightly to
ensure that it is well locked in the terminal.
Maximum
4.0 A
4.0 A
9.5 mm - 10.5 mm
Ensure that the stripped section of the
■
yellow/green cable is longer than the others.
The power connection cables must be type
■
H05 VVF with PVC insulation in accord-
ance with standard EN 60335-2-40.
The power wiring cable must have a
■
minimum cable section of 2.5 mm².
Make sure that the sector supply is via a
■
disconnect switch that can cut the current to
all poles.
If the indoor unit includes electric heating,
■
the power supply is separate. Make sure
that the supply cable is correctly sized.
Remove WTC Control box cover:
Make the electrical connections to the terminal
block in accordance with the wiring diagram
and lock the wires using special cable conduits.
IMPORTANT: POWER WIRING DEPENDS ON
FAN COIL UNIT TYPE AND CONFIGURATION.
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