Carrier 40KMQ Manuel d'instructions télécharger pdf (Page 22)

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.

Power connection

cables from frame

Power connection

cables from unit

Safety cord

Cable clamp

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.

A AIR B

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,KMQ 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.

2. 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 40KMC018 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

safety 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.

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Carrier 40KMQ Manuel d'instructions Page 22

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