Daikin FWB10CTN [6/76] Dimensions
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Daikin FWB10CTN [6/76] Dimensions

Daikin FWB04CFN [6/76] Dimensions
FWB
6
4 DIMENSIONS
At p.60-61FWB dimensional data and position of plumbing connections are shown.
5 INSTALLATION
WARNING: unit installation and start-up must be entrusted
to competent personnel and performed in a workmanlike
manner, in accordance with current regulations.
WARNING: Install the ducted unit, the line switch (IL) and/or
all remote controls in a position out of the reach of persons
who are in the bathroom or in the shower.
IMPORTANT: It is advisable to install any accessories on the
standard unit prior to positioning the latter, making refer-
ence to the technical sheets. The air intake and outlet have
a rectangular cross-section, with pre-cut holes for fastening
the available accessories upon request.
The heat exchanger connections can be switched over to the op-
posite side by carrying out the following steps (Heat exchanger
changing water side connections- p.62):
Ū remove the upper closing panel.
Ū remove the collecting condensate tray.
Ū remove the heat exchanger module by taking out the fas-
tening screws (2 per side).
Ū turn the heat exchanger by 180° (on the vertical axis) and
screw it back into the unit again.
Ū reassemble the tray and the upper closing panel.
INSTALLATION REQUIREMENTS
Some rules to follow
Ū Vent air from the exchanger while the pumps are o. For
this purpose use the air vent valves situated next to the ex-
changer connections.
Ū All ducts, especially the outlet ducts, must be insulated with
anti-condensation material.
Ū An inspection panel must be provided in proximity to the
unit to enable maintenance and cleaning operations.
Ū Install the control panel on the wall; choose an accessible
position from where functions may be easily set and which is
suitable for taking temperature readings, where applicable.
Avoid positions directly exposed to sunlight or direct cur-
rents of hot or cold air and make sure there are no obstacles
which may preclude a correct temperature reading.
WARNING:
In normal operation, particularly with the fan at minimum
speed and ambient air with high relative humidity, conden-
sation may form on the air outlet and on some external parts
of the unit.
To avoid such issues while always remaining within the oper-
ating limits envisaged for the unit, it is necessary to limit the
inlet temperature of the water inside the heat exchanger. In
particular, the dierence between the air dew point (T
A
,D
P
)
and the inlet water temperature (T
W
) must NOT exceed 14
°C, according to the following relationship: TW>TA,DP-14
°C
Example: in the case of ambient air at 25 ° C with 75% rela-
tive humidity, the dew point temperature is about 20 ° C and
therefore the inlet temperature of the water in the battery
must be greater then:
Ū 20-14 = 6 °C in order to avoid condensation on a fancoil
equipped with a valve.
Ū 20-12 = 8 °C If the valve kit accessory can not be installed.
Fan coil with valve
Air temperature dry bulb (°C)
21 23 25 27 29 31 33
Relative
humidity %
40 5 5 5 5 5 5 5
50 5 5 5 5 5 6 8
60 5 5 5 5 7 9 11
70 5 5 6 8 9 11 13
80 5 6 8 10 12 14 16
90 6 8 10 12 14 16 18
Fan coil without valve
Air temperature dry bulb (°C)
21 23 25 27 29 31 33
Relative
humidity %
40 6 6 6 6 6 6 6
50 6 6 6 6 6 8 10
60 6 6 6 7 9 11 13
70 6 6 8 10 11 13 15
80 6 8 10 12 12 16 18
90 8 10 12 14 14 18 20
In the event the indoor unit is stopped for a prolonged peri-
od, with the fan stopped and circulation of cold water in the
heat exchanger, condensation may also form on the unit’s
exterior. In this case it is advisable to install the 3-way (or
2-way) valve accessory in order to stop the ow of water in
the coil when the fan is stopped.
During wintertime periods of shut down, drain water from the
system, to prevent ice from forming. If anti-freeze solutions are
used, check for their freezing point using the table below.
% Glycol by weight
Freezing
temperature (°C)
Capacity
adjustment
Pressure drop
adjustment
0 0 1,00 1,00
10 -4 0,97 1,05
20 -10 0,92 1,10
30 -16 0,87 1,15
40 -24 0,82 1,20
Electrical connections
Make the electrical connections with the power supply discon-
nected, in accordance with current safety regulations.
All the wiring must be done by qualied personnel.
For each thermal ventilating unit provide a main circuit

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