Johnson Controls AHE Installation, Line Power Connections, Electric Heaters & Operating Controls

669997-UAI-D-1111

INSTALLATION

Installation is the same for all operating positions: upflow, hori- zontal right or left (Refer to Figure 1). Installation of the Heater Kit should be done prior to unit installation.

1.If Heat Kit has circuit breakers - remove circuit breaker knockouts from front of air handler unit. For kits with circuit breakers, cut blower access panel insulation along foil perforations behind the circuit breaker plate and remove to open the area for the circuit breakers to protrude through the front access panel and to provide clearance for circuit breakers and single point wiring entry kit. Replacement non-foil faced insulation for the exposed front panel may then need to be added. Add rubber gasket to inside of door.

2.Remove air handler blower access panel.

3.Remove duct cover from back panel of air handler control and wiring compartment.

4.Install electric heat accessory.

a.Position and slide heat kit into opening in air handler.

b.Align holes and fasten the Heat Kit to the air handler unit with 4 screws.

5.Connect the Heat Kit’s 6 pin socket connector to the appro- priate 6 pin connector in the air handler. The end terminals are “D” shaped to ensure polarization of the connector.

6.Connect the air handler power supply to either the circuit breaker or terminal block.

Verify edges of foil faced insulation are not in contact with any exposed electrical connections.

7.Mark an X in the appropriate box on the indoor unit data plate for the particular heater installed.

To prevent damage, carefully pass the accessory heating ele- ment through the rectangular opening in the discharge duct. Element mounting plate must be secured with 4 screws.

NOTICE

All wiring must comply with local and national electrical code requirements. Read and heed all unit caution labels.

FIELD SUPPLY WIRING WILL

BE ATTACHED TO THIS SIDE

UNIT WIRING ATTACHED

TO THIS SIDE

(Do not need to remove)

CIRCUIT BREAKERS

May be 1, 2, or 3)

FIGURE 2: Heat Kit Connection

LINE POWER CONNECTIONS

Power may be brought into the unit through the outlet air end of the unit (top left when unit is vertical) or the left side panel. To minimize air leakage, seal the field wiring entry point.

Field wiring connects to heat kits with circuit breaker or terminal block. A ground lug is also provided on the kits.

ELECTRIC HEATERS & OPERATING CONTROLS

The low voltage transformer and the fan control are standard on all models. The air handlers are shipped pre-wired to operate as cooling only applications.

2 Johnson Controls Unitary Products