Carrier 40KMC---N Installation Manual page 17

40KMC---N
Fresh air renewal and conditioned air supply to an adjacent room
Diagram of conditioned air supply to an adjacent room: one louvre closed
40
30
20
10
12
0
0 100
0
In case of two louvres closed, the fresh air flow towards the adjacent room is 50% higher compared with only one louvre
closed (with equal static external pressure).
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.
GB - 16
24/28
36
18
200
30 60
Air flow
60
48
410
300 400 450
113, 9
125
90 120
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
towards adjacent rooms.
3
m /h
l/s
Supply air duct to adjacent room