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Wiring Work
16. Connect the green (ground) wire to the ground lug to the left of the accessory heat kit breakers and tighten the ground lug
screw. Make sure to leave extra slack in the ground wire to allow service to the unit without disconnecting the ground wire.
If the heat kit requires 2 circuits (dual circuit) , both circuit ground wires must be connected to a ground lug (dual circuit kits
have two individual ground lugs).
17. Connect the six pin male plug on the electric heater assembly to the six pin female plug mounted at the bottom of the
control assembly door.
18. Remove the wiring diagram from the accessory heat kit. Remove the paper that covers the adhesive back and place the
electric heat wiring diagram over the wiring diagram located on the blower housing.
19. Route temperature sensor from the accessory electric heat kit to the lower section of the AHU cabinet. Attach the sensor to
the bottom of the liquid pipe as shown below with included wire ties.
liquid pipe
20. Wrap included insulation around the sensor and secure with included wire ties.
21. Remove the breaker opening cover plate on the AHU door and secure the doors to the unit.
NOTE: The electric heat kits are equipped with either one or two circuit breakers. These circuit breakers protect the wiring
inside of the AHU in the event of a short circuit. Additionally, these breakers provide a means of disconnecting the power
to the unit. The circuit breakers in the AHU's are not meant to protect the branch circuit wiring between the furnace and
the building's breaker panel. If sheathed cable is used, refer to NEC National Electrical Code (NFPA 70) or the Canadian
Electrical Code, Part I (CSA C22.1) and local codes for additional requirements concerning supply circuit wiring. Electrical
data can be found in page 21.
IMPORTANT - All installation on field wiring must be rated at 60°C or higher. Please refer to the wiring diagrams on the
furnace or the tables this manual for more information. The 15kW and 20kW models may be connected to a single or dual
branch circuit. Refer to the NEC National Electrical Code (NFPA 70) or the Canadian Electrical Code, Part I (CSA C22.1) and
local codes for wiring material requirements.
24 English
DB68-11271A-02_IM_CAC Universal AHU Indoor_AA_EN_.indd 24
Ground Lug
Breaker
V-AHU Control Box (single circuit)
Insulation (wrapped
around pipe and sensor)
Liquid pipe
Wire tie (to secure insulation)
6 Pin Plug
Wire tie
(to secure sensor to pipe)
Sensor wire
Sensor
2022-09-15 오전 9:53:19
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