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FIRE HAZARD!
To avoid the risk of property damage, personal injury or fire,
use only copper conductors.
HIGH VOLTAGE
Disconnect ALL power before servicing or
installing this unit. Multiple power sources
may be present. Failure to do so may cause
property damage, personal injury or death.
HIGH VOLTAGE!
To avoid property damage, personal injury or death due to
electrical shock, this unit MUST have an uninterrupted,
unbroken electrical ground. The electrical ground circuit
may consist of an appropriately sized electrical wire
connecting the ground lug in the unit control box to the
building electrical service panel.
Other methods of grounding are permitted if performed
in accordance with the National Electric Code (NEC)/
American National Standards Institute (ANSI)/National Fire
Protection Association (NFPA) 70 and local/state code. In
Canada, electrical grounding is to be in accordance with
the Canadian Electric Code (CSA) C22.1.
• Wire used must carry the Minimum Circuit Am-
pacity (MCA) listed on the unit's Series and Rating
Plate.
• Refer to the NEC (USA) or CSA (Canada) for wire siz-
ing. The unit MCA for the air handler and the optional
electric heat kit can be found on the unit Series and
Rating Plate.
• Wire must be sized to allow no more than a 2% volt-
age drop from the building breaker/fuse panel to
the unit.
• Wires with different insulation temperature rating have
varying ampacities - be sure to check the temperature
rating used.
Refer to the latest edition of the National Electric Code
or in Canada the Canadian Electric Code when deter-
mining the correct wire size.
13.3
Maximum Overcurrent Protection (MOP)
Every installation must include an NEC (USA) or CEC
(Canada) approved overcurrent protection device. Also,
check with local or state codes for any special regional
requirements.
Protection can be in the form of fusing or HACR style
circuit breakers. The Series and Rating Plate provides
the maximum overcurrent device permissible.
NOTE: Fuses or circuit breakers are to be sized larger
than the equipment MCA but not to exceed the MOP.
CAUTION
WARNING
WARNING
13.4
Electrical Connections – Supply Voltage
IMPORTANT NOTE: USE COPPER CONDUCTORS
ONLY.
Knockouts are provided on the air handler top panel
and sides of the cabinet to allow for the entry of the
supply voltage conductors, as shown in Figure 13. If the
knockouts on the cabinet sides are used for electrical
conduit, an adapter ring must be used in order to meet
UL1995 safety requirements. An NEC or CEC approved
strain relief is to be used at this entry point. Some codes/
municipalities require the supply wire to be enclosed in
conduit. Consult your local codes.
Top of
Cabinet
KNOCK-OUT FOR ELECTRICAL CONNECTIONS
13.4.1 Air Handler Only (Non-Heat Kit Models)
The building supply connects to the stripped black
and red wires contained in the air handler electrical
compartment cavity. A ground screw is also contained
in this area. Attach the Supply wires to the air handler
conductors as shown in the unit wiring diagram using
appropriately sized solderless connectors or other NEC
or CEC approved means.
13.4.2 Air Handler - Non-Circuit Breaker Heat Kits
A terminal block is provided with the HKS kit to attach
the power supply and air handler connections. Follow
the HKS Installation Manual and wiring diagram for
complete wiring details.
13.4.3 Air Handler With Circuit Breaker Heat Kit
The air handler has a plastic cover on the upper access
panel that will require either one or both sections to
be removed to allow the heat kit circuit breaker(s) to
be installed. The circuit breakers have lugs for power
supply connection. See the HKS Installation Instructions
for further details.
14 AVPTC Motor Orientation
If the unit is in the upflow position, there is no need to rotate
the motor. If the unit is in the downflow position, loosen
motor mount and rotate motor as shown in the AVPTC Motor
Orientation figure below. Be sure motor is oriented with the
female connections on the casing down. If the motor is not
oriented with the connections down, water could collect in
the motor and may cause premature failure.
13
Side of
Cabinet
Figure 12
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