2542GW
Fresh air (See g. 45)
• Remove the precut sheet metal (ref. 14) and install the air control
device by fixing it to the unit frame.
• Use materials that can withstand a permanent temperature of 60°
C. The ducts may be flexible or rigid, and coated with an anti-
condensation material.
• To complete the installation, all non-insulated ducts must be
covered with anti-condensate insulation.
Failure to follow these instructions may result in the appearance
of condensation; the manufacturer accepts no responsibility f
or
this.
Fresh air renewal (See g. 40e)
• If an optional auxiliary fan is installed to extract outdoor air (supplied
by the installer), it must be connected to the electrical installation in
accordance with the attached diagrams.
• Fan motor operation is parallel to the thermo-electric control valve,
and the motor stops when the valve shuts off.
• For winter operation with fresh air intake, an anti-freeze thermostat
set at 2°C is recommended, with the bulb placed on the water
outlet pipe, before the supplementary fan.
• The fresh air flow must be less than 10% of the total air flow, to
avoid operating problems or eccessive noise.
• For fresh air flow rates above 10 %, a "fresh air kit" is available for
connection. Connect the duct to the knockout to supply an adjacent
room with air via a diffuser.
• Install an outdoor intake grille and hatch with an inspection filter to
prevent the accumulation of dust and leaves. Filter installation also
makes the installation of a duct closing damper during shut-down
periods unnecessary.
See g. 24 - 25.
Carefully unpack the grille and inspect it to identify any damage that
may have occurred during transportation.
Assemble it on the unit, attaching it to the two mounting brackets
(ref. 15) and tighten the four mounting nuts with their washers (ref.
17).
To x the frame use only the screws supplied with it.
For IR controlled units, connect the power cables between the unit
and the frame.
The frame must not show any signs of deformation caused by
excessive pulling. It must be centred in relation to the suspended
ceiling and must provide a perfect seal between the air suction and
discharge.
In the drawing gasket "3" prevents return air from mixing with the
supply air and gasket "4" prevents the supply air from leaking into
the ceiling void.
Slight, occasional crackling noises may be heard in the case of
severe temperature gradients between the temperature of the water
circulating in the exchanger and the ambient room temperature.
These noises will disappear after a few minutes when the system
has stabilised
Fresh air supply
Installation of grille/frame assembly
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