Fresh Air Renewal And Conditioned Air Supply To Adjacent Room; Installation Of Grille/Frame Assembly - SystemAir SQ 20 Mode D'emploi

32 SQ
Fresh air renewal and conditioned air supply
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.
See fig. 47.
• The duct lengths and the increase in noise levels caused by these
ducts can be calculated in accordance with the "air supply to
an adjacent room diagrams " (also taking into account the flow
resistance through air diffusers and fresh air filters).
Air distribution to adjacent room (See fig. 44-45)
• Remove the precut sheet metal (ref. 15) using a punch.
• 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 renewal (See fig. 45)
• Remove the precut sheet metal (ref. 14) and install the air control
device by fixing it to the unit frame.
• 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
anticondensate 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.
See fig. 24 - 25.
Carefully unpack the assembly and check for damage sustained in
transit.
Attach the assembly to the unit, fastening it onto its two fixing
supports (ref. 15), then locking the four fixing nuts with their
spacers (ref. 17).
To fix the frame use only the screws supplied with it.
For units with I.R. control and/or motorized louvers the electric
cables must be connected between the unit and the frame.

Installation of grille/frame assembly

to an adjacent room
Fresh air renewal (See fig. 40e)
• 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. 44-45)
• 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. 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.
Ensure that the frame is not distorted by excessive tightening, that
it is aligned with the false ceiling and above all that there is a seal
between the air inlet and outlet.
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.
On completion, the gap between the unit frame and the false ceiling
must not be more than 5 mm.