FWC
Fan coil units
4PW64525-1B – 2014.03
Installation manual
8
Install the fan coil unit
Connector for optional parts
Notes
1
If a central remote controller is used, connect it to the unit in
accordance with the controller installation manual.
2
X24A, X33A and X35A are connected when optional accessories
are used.
3
Confirm the method of setting the selector switch (SS1, SS2)
using the installation manual, engineering data, etc.
4
Availability of R2T and/or R3T is depending on model type.
System examples
Q
When using 1 remote controller for 1 indoor unit (normal
operation) (See figure 12: “1 remote controller for 1 indoor unit”)
Q
For group control or use with 2 remote controllers (See figure 13:
“Group control or use with 2 remote controllers”)
Q
For forced OFF and ON/OFF operation, connect input wires from
the outside to terminals T1 and T2 of the terminal board (remote
controller to transmission wiring).
Table 4.2: Forced OFF and ON/OFF wiring specifications
Install the fan coil unit
4.6.1. Connect the power supply
See figure 9: “How to connect electrical wiring”.
1
Remove the control box cover (a) as illustrated in figure 9: “How
to connect electrical wiring”.
2
Pull the power supply cable (e) (or interconnection wiring in case
of common power supply) inside through the power supply cable
intake (c).
3
Strip the wires to the recommended length.
4
Connect the power supply wires to the power supply terminal
block (d).
5
Connect the ground wire (f) to the grounding terminal.
6
Securely fix the wiring using a clamp (g).
7
Install an earth leakage detector and fuse in the power supply line
(field supply). Select the earth leakage detector in accordance
with the applicable legislation. To select the fuse, refer to
“Electrical characteristics” on page 4
Install the fan coil unit
4.6.2. Connect the remote controller and unit
transmission wiring
1
Remove the control box cover (a) as illustrated in figure 9: “How
to connect electrical wiring”.
2
Pull the cables (i, j) inside through the remote controller and unit
transmission cables intake (h).
3
Strip the wires to the recommended length.
4
Connect the remote controller wires to (P1, P2) terminals of the
terminal block (k).
5
Connect the unit transmission wires to (F1, F2) terminals.
6
Securely fix the wiring using a clamp (g).
Install the fan coil unit
4.6.3. Close the control box
1
After all wiring connections are executed, fill gaps in the casing
cable intakes with the small sealing pad (delivered with the unit)
to prevent small animals, water or dirt from entering the unit
causing short circuits in the control box.
2
Fit the control box cover (a) back in place like illustrated in figure
9: “How to connect electrical wiring”. When attaching the control
box cover, make sure not to pinch any wires.
Install the fan coil unit
4.7.
Perform the drain piping work
Install the fan coil unit
4.7.1. Install the drain piping in the building
See figure 3: “Drain pipe installation”.
H3P
Light emitting diode (filter sign - red)
H4P
Light emitting diode (defrost - orange)
SS1
Selector switch (main/sub)
SS2
Selector switch (wireless address set)
X24A
Connector (wireless remote controller))
X33A
Connector (valve control adaptor)
X35A
Connector (external adaptor)
a
Fan coil unit
b
Remote controller (optional equipment)
c
Overcurrent fuse
a
Fan coil unit
b
Remote controller (optional equipment)
c
Overcurrent fuse
d
Interconnection wiring: total current should not
exceed 12 A.
Information
It is not necessary to designate indoor unit address when
using group control. The address is automatically set when
the power is activated.
Wire specification
Sheathed vinyl cord or
cable
(2 wire)
Gauge
0.75-1.25 mm²
Length
≤
100 m
External terminal
Contact that can ensure the
minimum applicable load of
15 V DC, 10 mA
a
Control box cover
b
Wiring diagram sticker
c
Power supply cable intake
d
Power supply terminal block – X2M
e
Power supply cable
f
Ground wire
g
Clamp
h
Remote controller and unit transmission cables
intake
i
Remote controller cable
j
Unit transmission cable
k
Remote controller and unit transmission terminal
block – X1M
a
Hanging bar
b
≥
1/100 gradient
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