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CSA C22.1, Part 1. A ground lug is provided for this
purpose. Do not use the ground lug for connecting a
neutral conductor.
• Connect power wiring to the electrical power block
located within the main control box.
LOW VOLTAGE BLOCK
MAIN POWER
CONTROL BOX
POWER THRU
THE CURB
Power and Low Voltage Block Connections
Control Box
NOTE: depending on the options installed, the
location of the components may vary in some
models.
Failure of unit due to operation on improper line voltage or
with excessive phase unbalance constitutes product abuse
and will void your warranty and may cause severe damage to
the unit electrical components.
Areas Without Convenience Outlet
It is recommended that an independent 115V power source
be brought to the vicinity of the roof top unit for portable
lights and tools used by the service mechanic.
NOTE: Refer to local codes for requirements.
These outlets can also be factory installed.
WARNING
Units installed on Roof Tops
Main power and low voltage wiring may enter the unit
through the condenser end of unit or through the roof curb.
Install conduit connectors at the desired entrance locations.
External connectors must be weatherproof. All holes in the
unit base must be sealed (including those around conduit
nuts) to prevent water leakage into building. All required
conduit and fittings are to be field supplied.
Supply voltage to roof top unit must not vary by more than
10% of the value indicated on the unit data plate. Phase
voltage unbalance must not exceed 2%. Contact your local
power company for correction of improper voltage or phase
unbalance.
HIGH VOLTAGE ENTRANCE
(REMOVE PLUG)
RETURN
POWER THRU
THE CURB
47-9/16"
Electrical Entrance and thru Curb
(Bottom View of Unit)
Low Voltage Control Wiring
1. A 24V thermostat must be installed for unit operation.
2. Locate thermostat or remote sensor in the conditioned
space where it will sense average temperature. Do
not locate the device where it may be directly exposed
to supply air, sunlight or other sources of heat. Follow
installation instructions packaged with the thermostat.
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 feet. Use #16 AWG wire for 24V control
wiring runs not exceeding 125 feet. Use #14 AWG
wire for 24V control wiring runs not exceeding 200
feet. Low voltage wiring may be National Electrical
Code (NEC) Class 2 where permitted by local codes.
9
19-3/8
31-3/8
LOW VOLTAGE
ENTRANCE
4-1/16 DIA.
4-1/2"
7-1/2"
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