Installation Manual

3
4. Remove the circuit breaker mounting bracket, leaving the circuit breakers connected.
5. AR, ARUF, ARPF, AEPF, ASPF, AVPTC, MBVC, MBE and MBR models.
Mount the circuit breaker mounting bracket as shown using
the supplied screws. Insert two of the screws through the
blower deck from the blower side. Insert the remaining
screws in the holes provided on the upper right side of the
jacket.
NOTE: HKA-15C replaces HKR-15C and HKA-20C replaces HKR-
20C in air handlers.
6. Insert the breaker with OFF position oriented down.
NOTE: In the horizontal position, the direction does not
matter. In some cases, it will be easier to wire the breakers
before reinserting them into the mounting bracket.
7. Insert power leads into the lugs provided on the circuit
breaker and tighten. The power leads MUST be routed
through a strain relief as they enter the cabinet.
8. Remove the multi-pin connector with the jumper wire and discard. Insert the one contained in the kit. It can be
inserted in one position only.
9. Insert the provided ground wire into the lug(s).
10. Break out the appropriate area of the plastic circuit
breaker cover on the access panel on the air handler.
Rotate if necessary.
11. Replace panel and check operation.
12. Apply the wiring diagram over the one found on the air
handlers. On the “AVPTC and MBVC” Airhandler wiring diagram which is included, mark an “X” on the wiring
diagram according to the number of Heater Element rows installed.
13. If installing an HKA heater kit on a unit that only has the corresponding HKR heater kit shown on the serial plate,
use a permanent marker to add the HKA model to the serial plate (the data is the same as the HKR). If the
corresponding HKR model number is not on the serial plate, the heater kit cannot be used.
T HREE -P HASE U NIT I NSTALLATION
1. Follow steps 1 through 4 from “Standard Air Handler
Installation” section.
2. Using the two 1" screws provided, mount the terminal
block on the right hand side of the heater panel on the
airhandler (mounting holes are provided).
3. Wire the terminal block leads to the transformer as per
the wiring diagram.
4. Insert single phase power leads into lugs provided on the terminal block and tighten.
5. Insert three-phase power leads into lugs provided on the contactor and tighten. The power leads MUST be routed
through a strain relief as they enter the cabinet.
6. Follow steps 9, 10, 11 and 12 from “Standard Air Handler Installation” section.
HIGH VOLTAGE !
D ISCONNECT ALL POWER BEFORE SERVICING .
M
ULTIPLE POWER SOURCES MAY BE PRESENT . F AILURE
TO DO SO MAY CAUSE PROPERTY DAMAGE , PERSONAL
INJURY OR DEATH .
WARNING
Steps 4 through 7 and 10 pertain to kits that contain circuit breakers.
CIRCUIT
BREAKER
MOUNTING
PLATE
FIGURE 1
HIGH VOLTAGE !
TO AVOID THE RISK OF ELECTRICAL SHOCK , A MEANS OF
STRAIN RELIEF AND CONDUCTOR PROTECTION MUST BE
PROVIDED AT THE SUPPLY WIRE ENTRANCE .
WARNING