Fresh Air Renewal And Conditioned Air Supply To Adjacent Room; System Configuration - Carrier 40KMC N Series Installation Manual

Fresh air renewal and conditioned air
supply to an adjacent room
See fig. 48 - 49.
• 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 baffle supplied after frame has been hooked as per
above figure.
Following that screw the frame/grille assembly 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 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 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.

System configuration

The unit settings are made at the factory (refer to the specific
instruction sheet).
In the case of system installation other than the original one (as
referred to in the specific instruction sheet) the factory configuration
must be changed.
Such operation must be performed by the installer as follows:
Cooling only configuration (of the system)
• Check all electrical connections (instructions and wiring diagram).
• Insert the batteries into the remote control and leave it OFF.
• Energise the system, turning the power supply ON.
• Press the and buttons of the infrared remote control and
hold them pressed for more than 5 seconds.
• The display will be cleared, the time segments will display the
first configuration item (rAdr = remote address) and the tempera-
ture segments will display the default value of this configuration
item (Ab = control of both indoor units).
• Press button repeatedly until "UCFG" is displayed.
• Press either the or button to change the default value (HP)
to the new value (CO).
• Press the button to send the configuration to the unit, which
will confirm with a "beep".
See fig. 50.
Fresh air renewal
• 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.
Conditioned air supply to an adjacent room
• 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
• Press button to leave the configuration menu.
For other available configuration options, see table VIII.
Heat pump configuration (of the system)
• Check all electrical connections (instructions and wiring diagram).
• Insert the batteries into the remote control and leave it OFF.
• Energise the system, turning the power supply ON.
• Press the and buttons of the infrared remote control and
hold them pressed for more than 5 seconds.
• The display will be cleared, the time segments will display the
first configuration item (rAdr = remote address) and the tempera-
ture segments will display the default value of this configuration
item (Ab = control of both indoor units).
• Press button repeatedly until "UCFG" is displayed.
• Press either the or button to change the default value (CO)
to the new value (HP).
• Press the button to send the configuration to the unit, which
will confirm with a "beep".
• Press button to leave the configuration menu.
For other available configuration options, see table VIII.
40KMC---N 31