Table of Contents
Advertisement
14
4.0 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. See the unit nameplate, wiring diagram and electrical data in the installa-
tion instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight of,
and readily accessible to the unit.
• IMPORTANT: After the Electric Heater is installed, units may be equipped with one,
two, or three 30/60 amp. circuit breakers. These breaker(s) 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 there-
fore 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 may be connected to either the right, left side or top. Three
31
1
/
" dia. concentric knockouts are provided for connection of power wiring to unit.
32
• Power wiring is connected to the power terminal block in unit control compartment.
4.2 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 (upflow position - see Figure 3). Connections for control wiring are
made with wire nuts. Control wiring knockouts (5/8 and 7/8) are also provided on the
right and left side of the unit for side connection.
• See wiring diagrams attached to indoor and outdoor sections to be connected, or
control wiring diagram booklet supplied with outdoor heat pump section for wiring
connection.
• Make sure, after installation, separation of control wiring and power wiring has been
maintained.
• Low voltage control wiring should be 18 Awg. color-coded. For lengths longer
than 100 ft., 16 Awg. wire should be used.
7
3
/
", 1
/
",
8
32
Advertisement
Table of Contents
