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5.0 FILTERS
Units are shipped without a filter or filter racks. It is the responsibility of the
installer to secure a filter in the return air ductwork or install a filter/frame Kit.
Filter must always be used and must be kept clean. Dirty filters may cause
insufficient air delivery, decreasing unit efficiency and increasing operation costs
and wear-and tear on the unit and controls.
Filters should be checked monthly; this is especially important since this unit is
used for both heating and cooling.
6.0 ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (NEC) or Canadian
Electrical Code (CEC) and any applicable local ordinance.
Disconnect all power to unit before installing or servicing. More than one
disconnect switch may be required to de-energize the equipment. Hazard-
ous voltage can cause severe personal injury or death.
6.1 POWER WIRING
1. Proper electrical power should be available at unit. Voltage tolerance should not
be over 10% from rating voltage.
2. If any of the wire must be replaced, replacement wire must be the same type
as shown in nameplate, wiring diagram and electrical data sheet.
3. Install a branch circuit disconnect of adequate size to handle starting current,
located within sight of, and readily accessible to the unit.
4. ELECTRIC HEATER - If the Electric Heater is installed, unit may be equipped
with 30~60A. circuit breakers or fuse. 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
therefore may be sized larger than the branch circuit protection.
• Supply circuit power wiring must be 221 °F minimum copper conductors only.
See 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.
• 1-3/8" knockouts inside the cabinet are provided for connection of power wiring
to electric heater.
• Power wiring is connected to the power terminal block in unit electric cabinet.
See Electrical Heater Installation Instruction for details.
WARNING
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