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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.
For each unit an (IL) switch should be mounted on the power
supply, with opening contacts at a distance of at least 3 mm
and a suitable protection fuse (F) .
WARNING:
Install the unit, circuit breaker (IL) and/or any re-
mote controls in a place out of reach of persons who may be
taking a bath or shower.
WARNING:
the EMC filters connected to frequency con-
verters (inverters) can create leakage currents toward
ground (in order to make the unit EMC compliant, by re-
ducing conducted emissions on power supply line). De-
pending on installation site, this can force the cut out of the
differential safety switch. It is recommended to install a sepa-
rate differential safety switch, only for the BLDC unit, with an
adjustable threshold for the cut out current.
WARNING: base unit must be protect by original packaging
to avoid demage at the worksite, before cabinet installation.
INSTALLATION REQUIREMENTS
The fan coils should be installed in a position where the room
can be cooled or heated evenly, on walls able to withstand their
weight.
It is advisable to install any accessories on the standard unit pri-
or to positioning the latter.
For installation and use of accessories, please refer to the relative
technical sheets.
Install any remote control panel in an easily accessible position
allowing the user to set the functions while ensuring an accurate
reading of the ambient temperature, if provided.
Avoid therefore:
Ū positions directly exposed to sunlight;
Ū positions exposed to direct currents of warm or cold air
Ū placing obstacles that impede an accurate temperature
reading
The water connections are on the left side, viewing the unit
from the front.
Hydraulic connections on the opposite side are available on-
ly on order
The water connection pipes must pass through the slots pro-
vided on the rear panel of the unit (depending on the L or R
version, use the appropriate slot)
NB:
Water temperature probe:
The positioning of the water probe, if present, can be of two
types:
-If the machine is equipped with a valve kit, the water probe
must be fixed in the appropriate probe holder (a small copper
pipe), as shown in the accessory's instructions
-If the machine is NOT equipped with a valve kit, the water
probe, made available on the side of the hydraulic connections,
must be fixed on the INLET water pipe by means of the special
probe holder (a small copper socket) filled with conductive
paste. Finally, the probe must be properly insulated to ensure
that it reads the water temperature correctly.
NB:
Air temperature probe: if present, must be fixed in the
lower part of the unit, under the motor support bracket,
using the supplied adhesive probe holder
Make the plumbing connections to the heat exchanger and,
where the cooling function is to be used, to the condensate
20
ART-U
WARNING: keep the cabinet inside the original packaging
until the finally installation
When choosing an installation site, you should observe the fol-
lowing rules:
Ū The air conditioning unit should not be placed immediately
under a socket
Ū Do not install the unit in places where inflammable gases or
powders are present
Ū Do not expose the unit to sprays of water
Ū Install the unit on walls able to withstand its weight. Keep a
clear space all around the unit to assure the proper function-
ing and accessibility for routine and extraordinary mainte-
nance (see figure 11.4 Dimension p. 62)
Ū store the unit in its packing container until you are ready to
install it
The positioning of the filter is guided by a support on the back
panel and side magnets.
The fixing must be completed with the two screws (4 MA)
and the special Allen key included in the package. See picture
11.11 Air filter .
drainage outlet.
It is recommended to connect the installation intake to the up-
per part of the heat exchanger and the return to the bottom part
of it.
Bleed air from the exchanger by means of the air vent valves
(hexagonal wrench type 10) situated beside the plumbing con-
nections of the exchanger. See figure 11.5 Air vent p. 63.
To favour the drainage of condensate, the drain hose should be
inclined downward, at least 3 cm/m; make sure that no loops or
bends form along its path.
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 op-
erating limits envisaged for the unit, it is necessary to limit
the (average) temperature of the water inside the heat ex-
changer. In particular, the difference between the air dew
point (T
,D
) and the average water temperature (T
A
P
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% rel-
ative humidity, the dew point temperature is about 20 ° C
and therefore the average 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
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40
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60
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5
Relative
Humidity %
70
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5
80
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6
90
6
8
) must
WM
Air temperature dry bulb (°C)
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