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3
Adjust the unit to the right position for installation.
Use the installation guide (delivered with the unit) for exact
vertical positioning of the unit.
Apply the short side of the installation guide in case of
normal installation as illustrated below.
a
Fig. 4.2: Normal installation
a
Suspended ceiling
b
Fan coil unit
Apply the long side of the installation guide in case of
installation with fresh air intake kit as illustrated below.
a
Fig. 4.3: Installation with fresh air intake
a
Suspended ceiling
b
Fan coil unit
4
Check if the unit is horizontally levelled.
Do not install the unit tilted. The unit is equipped with a built-
in drain pump and float switch. If the unit is tilted against the
direction of the condensate flow (the drain piping side is
raised), the float switch may malfunction and cause water to
drip.
Check if the unit is levelled at all four corners with a water
level or a water-filled vinyl tube as illustrated in the figure
below.
a
b
Fig. 4.4: Check if unit is levelled
a
Water level
b
Vinyl tube
5
Remove the paper pattern for installation. (For new ceilings only.)
Install the fan coil unit
FWC
Fan coil units
4PW64525-1B – 2014.03
b
b
b
4.5.
Perform the water piping work
Install the fan coil unit
4.5.1. Connect the water pipes
The unit is equipped with water outlet and inlet connections. There is
an air purge valve that is fitted along with the water inlets and outlets
for air purging as illustrated in figure 6: "Water piping connection".
a
Drain pipe connection
b
Power supply entry hole
c
Water inlet (3/4" female BSP)
d
Water outlet (3/4" female BSP)
e
Cold water inlet (3/4" female BSP)
f
Cold water outlet (3/4" female BSP)
g
Hot water inlet (3/4" female BSP)
h
Hot water outlet (3/4" female BSP)
i
Transmission wiring entry
j
Air purge valve
Connect the water inlet and outlet connections of the fan coil unit to
the water piping as illustrated in figure 5: "Connecting the water
piping".
a
Water piping:
3/4" male BSP in case of direct connection to
the unit,
3/4" female BSP in case of connection to an
optional valve.
b
O-ring (delivered with the unit)
Notice
Do not use excessive force when connecting the piping.
This could deform the unit piping.
Deformation of the piping can cause the unit to malfunction.
In case the optional valve is used, refer to the installation manual of
the valve kit to install the field piping.
Install the fan coil unit
4.5.2. Insulate the water pipes
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation and reduction of the capacity.
c
d
c
d
b
a
Fig. 4.5: Water piping insulation
a
Water inlet
b
Water outlet
c
Sealing pad for piping connections (delivered with
the unit)
d
Insulation tube (delivered with the unit)
If the temperature is higher than 30°C and the relative humidity is
higher than 80%, then the thickness of the sealing materials shall be
at least 20 mm in order to avoid condensation on the surface of the
sealing.
Install the fan coil unit
Install the fan coil unit
Installation manual
6
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