Johnson Controls AHR, AHE User Manual

ACCESSORY KIT INSTALLATION MANUAL

REMOVE
DUCT COVER

3.

FIELD SUPPLY WIRING
THIS SIDE

5.

SLIDE HEATER KIT INTO
AIR HANDLER AND ATTACH
WITH 4 DUCT COVER SCREWS

4.

BLOWER
ACCESS PANEL

2.

REMOVE

IF HEAT KIT TO BE INSTALLED
HAS CIRCUIT BREAKERS,
REMOVE CIRCUIT BREAKER
KNOCKOUTS.

1.

ELECTRIC HEATER ACCESSORY - 6HK SERIES

FOR USE WITH THE FOLLOWING AIR HANDLER

MODELS: AHR / AHE

GENERAL INFORMATION

ELECTRICAL SHOCK HAZARD

Installation or repairs made by unqualified persons can result
in hazards to you and others. Installation must conform with
local building codes or, in the absence of local codes, with
National Electrical Code ANSI/NFPA 70-1996 or current edi­tion.
The information contained in this manual is intended for use
by a qualified service technician familiar with safety proce­dures and equipped with the proper tools and test instru­ments.
Shut OFF electric power at unit disconnect and/or service
panel before beginning the following procedures.
Failure to carefully read and follow all instructions in this man­ual can result in malfunction, property damage, personal
injury, and/or death.
Verify edges of foil faced insulation are not in contact with any
exposed electrical connections.

This instruction covers the physical installation of the following
electric heaters with AHR/AHE18-60 single piece air handlers.
Refer to unit instructions for electrical specifications.

These electric heat accessories are used for applications of
cooling with electric heat and heat pump with electric heat.
Each of the air handler unit models are approved for use with
specific electric heat accessories. The Air Handler installation
instructions, or name plate list the possible combinations and
other important electrical data and limitations.

TABLE 1: Models Covered*

6HK06500206
6HK16500206
6HK06500506
6HK16500506
6HK06500806
6HK16500806
6HK06501006
6HK16501006
6HK16501306
6HK16501506
6HK16501806
6HK16502006

* Refer to Page 4 for nomenclature.

6HK16502506
6HK06501525
6HK06501825
6HK16501825
6HK16502025
6HK16502525
6HK26501306
6HK26501506
6HK26501806
6HK26502006
6HK26502506

FIGURE 1: Heater Installation

Johnson Controls Unitary Products 669997-UAI-D-1111

669997-UAI-D-1111

NOTICE

FIELD SUPPLY WIRING WILL
BE ATTACHED TO THIS SIDE

CIRCUIT BREAKERS
May be 1, 2, or 3)

UNIT WIRING ATTACHED
TO THIS SIDE
(Do not need to remove)

INSTALLATION

Installation is the same for all operating positions: upflow, hori­zontal 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 fron t 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.

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

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 appro­priate 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.

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

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.
minimize

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

2 Johnson Controls Unitary Products

air leakage, seal the

field

wiring entry point

.

ELECTRIC HEATERS & OPERATING
CONTROLS

To

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.