Fresh Air Renewal And Conditioned Air Supply To Adjacent Room; Conditioned Air Supply To An Adjacent Room (See Fig. 47) - Carrier 42 GW serie Installationsanweisung

Motorized valve and control
• If these connections are not made as described the drain
pan condensate may overflow.
• Valves should only open when the fan motor is working, i.e.
when one of TB1 terminals 1 or 2 or 3 is supplied from TB1
terminal 4.
• The optional electric heater (mod. 42GWE) which can only be
factory installed, must only be energized when the fan is
working.
• The optional electric heater which must be factory installed on
model 42GWE, works only if TB1 terminals 5-6 are supplied
Fresh air renewal and conditioned air
supply to an adjacent room
See fig. 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 baffle supplied after the frame has been hooked as
per above figure.
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 flexible polyester (with spiral core) or
corrugated aluminium, externally covered with anti-condensate
material (fibre 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 diffusers, grilles and fresh air filters),
as well as the increase in noise caused by these ducts.
from TB1 terminal 4.
• The water discharge pump should work every time the
cold water valve is opened, supplying TB1 terminal 7 and
8 from TB1 terminal 4.
• When the system is filled with water, verify all couplings
for tightness.
• The manufacturer does not accept responsibility for the
tightness of the field - installed valve assembly and this
is not tested in the factory.
He declines any responsibility for non functioning of
these assemblies and for damage due to dripping.
Fresh air renewal (See fig. 46)
• The optional supplementary fan for fresh air intake (field
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 flow must be less than 10% of the total air flow, to
avoid operating problems or eccessive noise.
For higher air flow a "primary air kit" is available which uses
the prepunched hole for air ducting to an adjacent room and a
baffle so that the fresh air is introduced into the room through
a diffuser.
• Install an air inlet grille with filter 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 fig. 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 fitted (if possible near the floor)
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 diffusers and fresh air
filters.
• DO NOT use active carbon or electrostatic filter kits for
ducts towards adjacent rooms.
42 GW 27