Fresh Air Renewal And Conditioned Air Supply To Adjacent Room - Carrier 42GW B Serie Manual De Instalación

Fresh air renewal and conditioned air
supply to an adjacent room
See fi g. 44 - 45.
• Side knockouts allow connection of fresh air inlet ducts and ducts to
deliver conditioned air to an adjacent room.
• Remove the external prepunched anti-condensate insulation and
take away the knockout panels using a punch.
Air distribution to adjacent room
With a pencil, trace a line on the polystyrene around the inside edges of
the panel that was previously removed.
Cut away the polystyrene with a knife, taking care not to damage the
heat exchange coil.
Fresh air intake
Remove the polystyrene partition.
Introduce the baffl e supplied after the frame has been hooked as per
above fi gure.
Following that tighten the assembly frame/grille using the 4 screws.
• Use locally purchased material, suitable for operating temperatures
of 60 °C (continuous). Conduits can be of fl exible polyester (with
spiral core) or corrugated aluminium, externally covered with anti-
condensate material (fi bre glass of 12 +/- 25 mm thickness).
• To complete the installation, all non-insulated ducts must be covered
with anti-condensate insulation (ex. expanded neoprene, 6 mm
thickness).
If these instructions are not observed, condensate may drip; the
manufacturer will not be held responsible for any damage caused.
• The two prepunched side knockouts must not be used at the same
time to deliver conditioned air to an adjacent room.
• The return and supply duct lengths can be calculated in accordance
with the "air distribution to an adjacent room" and "fresh air renewal"
diagrams (also taking into account the pressure drop through air
diff users, grilles and fresh air fi lters), as well as the increase in noise
caused by these ducts.
Fresh air renewal (See fi g. 46)
• The optional supplementary fan for fresh air intake (fi eld supplied)
has to be connected to terminal block as per diagrams enclosed.
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 fl ow must be less than 10% of the total air fl ow, to avoid
operating problems or eccessive noise. For higher air fl ow a "primary
air kit" is available which uses the prepunched hole for air ducting to
an adjacent room and a baffl e so that the fresh air is introduced into
the room through a diff user.
• Install an air inlet grille with fi lter inspection port to prevent dust
and dirt from entering and fouling the unit heat exchanger. Filter
installation also makes the installation of a duct closing damper
during shut-down periods unnecessary.
Conditioned air supply to an adjacent room
(See fi g. 47)
• Air supply to an adjacent room requires that the outlet
corresponding with the duct is closed, using the air supply
outlet obstruction kit supplied. The kit cannot be used in units
equipped with electric heater (mod. 42GWE).
An air inlet grille must be fi tted (if possible near the fl oor) between
the air conditioned room (where the unit is situated) and the adjacent
room or, alternatively, the door must be undercut, as shown in the
drawing.
• The duct lengths can be calculated in accordance with the "air
distribution to an adjacent room" diagram, also taking into account
the pressure drop through air diff users and fresh air fi lters.
• DO NOT use active carbon or electrostatic fi lter kits for ducts
towards adjacent rooms.
42 GW...B 27