Fresh Air Renewal - Carrier 42VMC---N Installation Manual

42VMC---N

Fresh air renewal

Models 009N - 012N
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.
• 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.
Hole for external air intake
Ø 70
Models 028N - 048N
Ø 80
570
• 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.
Models 014N - 018N - 024N
Ø 74
E N G L I S H
GB - 17