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5.6.2
Connecting the optional equipment
Technical specifications of the valves
Kvs value
Max. operation
pressure PN (bar)
2.8
16
4
6
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.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
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.
6‒1 Field wiring specifications
Maximum operating current (A)
Maximum operating current (A) with valvesFN
Recommended overcurrent fuse (A)
Phase
FWE-F
Fan coil units
3P756931-1 – 2023.11
Actuator power
supply
1 Ph, 230 V,
50-60 Hz
making
the
current-carrying
04
0.27 0.27 0.38 0.44 0,48 0.53 0.81 0.88 0.88 1.06
0.34 0.34 0.45 0.51 0.55 0.60 0.88 0.95 0.95 1.13
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the switch 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.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring MUST be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do NOT come into contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electrical shock or fire.
2 Pipe
05
06
08
10
12
5
1
6 Electrical installation
14
16
20
24
Installation and operation manual
13
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