Manufacturer reserves the right to change specifications or designs without notice.
10.2019
Air Handler Unit Installation Instruction
10/20
4.
Electrical Wiring
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any applicable local ordinance.
WARNING
Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required
to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.
4.1
Power Wiring
It is important that proper electrical power is available for connection to the unit model being installed. Refer
to the unit nameplate, wiring diagram and electrical data in the installation instructions.
•
If required, install a branch circuit disconnect of adequate size, located within sight of, and readily
accessible to the unit.
•
When the electric heat is installed, units may be equipped with one or two 30~60 amp. circuit breakers.
These breakers protect the internal wiring in the event of a short circuit and serve as a disconnect. Circuit
breakers installed within the unit do not provide over-current protection of the supply wiring and therefore
may be sized larger than the branch circuit protection.
•
Supply circuit power wiring must be 167
°
F minimum copper conductors only. Refer to electrical data in this
section for ampacity, wire size and circuit protector requirements. Supply circuit protective devices may be
either fuses or “HACR” type circuit breakers.
Figure 4-1 Wiring Diagram
