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6 Cable holders (k). Connect the cooling valve cable (blue label)
to the X32A socket and the heating valve cable to the X37A
socket (l).
k
6
Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provides full
disconnection under overvoltage category III.
FWF02~05D
Fan coil units
3P443944-9T – 2023.01
j
i
l
6.1
Preparing electrical wiring
WARNING
All field wiring and components MUST be installed by a
licensed electrician and MUST comply with the applicable
legislation.
DANGER: RISK OF ELECTROCUTION
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.
CAUTION
▪ When connecting the power supply: connect the earth
cable
first,
before
connections.
▪ When disconnecting the power supply: disconnect the
current-carrying cables first, before separating the earth
connection.
▪ The length of the conductors between the power supply
stress relief and the terminal block itself MUST be as
such that the current-carrying wires are tautened before
the earth wire is in case the power supply is pulled
loose from the stress relief.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
WARNING
Do NOT apply any permanent inductive or capacitance
loads to the circuit without ensuring that this will NOT
exceed the permissible voltage and current permitted for
the equipment in use.
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 in such a way that they keep a proper
distance from stereo equipment, personal computers, etc.
DANGER: RISK OF ELECTROCUTION
▪ Turn OFF all power supply before removing the fan coil
unit terminal cover when connecting electrical wiring or
touching electrical parts.
▪ Disconnect the power supply for more than 10 minutes,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you
can touch electrical components. For the location of the
terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the terminal
cover is removed.
6 Electrical installation
making
the
current-carrying
Installation and operation manual
15
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