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vide over-current protection of the supply wiring and therefore may be sized larger
than the branch circuit protection.
• Supply circuit power wiring must be 75°C minimum copper conductors only. See
Electrical Data in this section for ampacity, wire size and circuit protector requirement.
Supply circuit protective devices may be either fuses or “HACR” type circuit breakers.
• Power wiring is connected through the
7
/
8
” or 1
3
/
8
” knockout located on the top right
hand side of the unit.
• Power wiring is connected to the power terminal block in unit control compartment.
5.2 CONTROL WIRING
IMPORTANT: Class 2 low voltage control wire should not be run in conduit with power
wiring and must be separated from power wiring, unless class 1 wire of proper voltage
rating is used.
• Low voltage control wiring should be 18 Awg. color-coded. For lengths longer than
100 ft., 16 Awg. wire should be used.
• Low voltage control connections are made to low voltage pigtails extending from top
of air handler. Connections for control wiring are made with wire nuts. Control wiring
knockouts are also provided on the left side of the unit.
• See wiring diagrams attached to indoor and outdoor sections to be connected, or con-
trol wiring diagram booklet supplied with outdoor heat pump section for wiring con-
nection.
• Make sure, after installation, separation of control wiring and power wiring has been
maintained.
5.3 GROUNDING
• Grounding may be accomplished by grounding metal conduit when installed in accor-
dance with electrical codes to the unit cabinet.
• Grounding may also be accomplished by attaching ground wire(s) to ground lug(s)
provided in the unit wiring compartment.
• Ground lug(s) are located close to wire entrance on left side of unit.
• Use of multiple supply circuits require grounding of each circuit to lug(s) provided in
unit.
5.4 ELECTRICAL WIRING
POWER WIRING
• Field wiring must comply with the National Electrical Code (C.E.C. in Canada) and
any applicable local ordinance.
• Supply wiring must be 75°C minimum copper conductors only.
• See electrical data for product Ampacity rating and Circuit Protector requirement.
GROUNDING
• This product must be sufficiently grounded in accordance with National Electrical
Code (C.E.C. in Canada) and any applicable local ordinance.
• A grounding lug is provided.
!
WARNING
The unit must be permanently grounded. Failure to do so can result in electri-
cal shock causing personal injury or death.
