42VMC
GB - 14
Air delivery and fresh air renewal
Ceiling installation, cooling
Ceiling installation, heating
Fresh air renewal
Units are prearranged for introduction of renewal air through a
prepunched hole located on back side.
Back knockout allows connection of fresh air inlet duct.
Model 009 - 012
Model 014 - 018 - 024
• Use locally purchased material, suitable for operating
temperatures of 60 °C (continuous).
Conduits can be of flexible polyester (with spiral core) or
corrugated aluminium, externally covered with anti-condensate
material (fibre glass from 12 to 25 mm thickness).
• To complete the installation, all non-insulated ducts must be
covered with anti-condensate insulation (ex. expanded neoprene,
6 mm thickness).
Not observing of these instructions may cause condensate
dripping; the manufacturer will not be held responsible for any
damage caused.
• The supplementary fan motor for outside air intake has to be
supplied separately and controlled by a bipolar ON-OFF switch
with safety fuses (field-installed).
To adjust the fan motor air flow to the required values it is
advisable to install a speed controller.
Fresh air flow must be less than 10% of the total air flow, to
avoid operating problems.
For fresh air ventilation rates higher than 10%, a primary air
treatment system with separate deflectors is recommended.
• Install an air inlet grille with filter inspection port to prevent
dust and dirt from entering and fouling the indoor unit heat
exchanger.
Filter installation also makes the installation of a duct closing
damper during shutdown periods unnecessary.
Air delivery direction
Wall installation, heating
Wall installation, cooling
IMPORTANT:
Air is supplied into the room through the grilles located on top
of the cabinet; air from the room is drawn into the unit through
the grilles and filter at the bottom of the unit.
“No draught”
(guide vane fully open)
(position recommended for ceiling installation in
cooling mode, to avoid draughts)
Make absolutely sure that the above parts are not obstructed
(even partially).