10
• Make sure, after installation, separation of control wiring and power wiring
has been maintained.
6.2 GROUNDING
WARNING
The unit must be permanently grounded. Failure to do so can result in
electrical shock causing personal injury or death.
• Grounding may be accomplished by grounding metal conduit when installed in
accordance 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.
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 25~50A. 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.
• An 1-3/8” knockouts inside cabinet is 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.
6.3 CONTROL WIRING
IMPORTANT:
Class 2 low voltage control wiring SHOULD NOT be run in
conduit with main 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 50 ft, 16 AWG wire should be used.
• Two 7/8” holes can be used for control wires going into the unit, one on left
side and one at the bottom.
Thermostat
should be mounted on an inside wall about 58” from floor and
will not be affected by unconditioned air, sun and/or heat exposure. Follow
the instruction carefully because there are many wiring requirements.
See
Fig. 6-1 ~ 2, Table 7-1 ~ 4
