Carrier 40KMQ Installation Instructions

6. Conduct a final check to make sure that the unit is level
7. Install the Grille and Frame Assembly
a. Carefully unpack the assembly and check for damage
sustained in transport.
b. Attach the assembly to the unit by using the two hooks.
See Fig. 35.
Frame support brackets
A09548
Fig. 35 - Attach Frame Assembly
c. Tighten the factory supplied screws to fix the frame in
position. See Fig. 36.
d. Link the electrical connectors and insert the wires in
cable clamp. See Fig. 36.
@ Safety cord
@ Cable clamp
@ Power connection
cables from unit
@® Power connection
cables from frame
® Frame support
screws
A09549
Fig. 36 - Fix Frame in Position
e. Ensure that the frame is not distorted by excessive tight-
ening, that it is aligned with false ceiling and that there
is seal between the air inlet and outlet. See Fig. 37.
LLL
A. Gasket "A"
B. Gasket "B"
A09550
Fig. 37 - Gasket Location
NOTE: Gasket “A” prevents return air from mixing with the
supply air and gasket “B” prevents the supply air from leaking
into the ceiling void. Once the unit is mounted in the ceiling,
the gap between the unit frame and false ceiling must not be
more than 3/16 in. wide.
INSTALLATION OPTIONS
The 40KMC,KMO units can be used to cool an adjacent room or
for fresh-air ventilation. Plan the installation carefully. Measure
carefully and follow acceptable building practices and the National
Electric Code (NEC).
Fresh Air Intake
1. Using Fig. 38, locate and remove the factory-installed insu-
lation from the side of the unit where the pre-punched
knockouts are located.
bo . Remove the pre-punched knockouts for fresh air intake.
Refer to Fig. 38. Be careful not to damage internal parts
such as the heat exchanger coil.
3. If installing a 4OKMCO018 unit, install baffle. Refer to Fig.
38.
4. Install ductwork using field-supplied, insulated flex duct, or
insulated sheet metal suitable for working temperatures up
to 140°F (60°C). Conduits can be of flexible polyester
(with spiral core) or corrugated aluminum, externally
covered with anti-condensate material (fiberglass from 1/4
in. to 1 in. thickness).
5. Use Fig. 39 to determine the allowable static pressure loss
for the ductwork airflow. The ductwork design must not ex-
ceed this value or the job airflow requirements will not be
met.
IMPORTANT: Ventilated air must not exceed 10% of the total
airflow or problems with operation will result. If the ventilated
air surpasses 10% of the total airflow, a field supplied primary
air treatment system with separate deflectors is recommended.
6. Use a field-supplied fan if airflow does not meet job re-
quirements. The field-supplied fan motor for outside air in-
take must be controlled by a bipolar ON/OFF switch with
satety fuses.
7. 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.
8. All non-insulated ducts must be covered with anti-con-
densate insulation (such as expanded neoprene, 1/4 in.
thickness).
Conditioned Air Supply to Adjacent Room — Air supply to an
adjacent room requires that the outlet corresponding with the duct
is closed, using the air supply outlet obstruction accessory kit.
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 Fig. 38. The duct lengths can be calculated in accordance
with Fig. 39, also taking into account the pressure drop through air
diffusers and fresh air filters.
IMPORTANT: DO NOT use active carbon or electrostatic
filter kits for ducts towards adjacent rooms.
bo
bo

Carrier 40KMQ Specifications

General

Brand	Carrier
Model	40KMQ
Category	Air Conditioner
Language	English