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If any of the original wire as supplied with the
unit must be replaced, it must be replaced with
material of the same gage and temperature
rating.
WARNING:
To avoid the risk of electrical shock,
personal injury, or death, disconnect
all electrical power to the unit before
performing any maintenance or
service. The unit may have more than
one electrical power supply.
Line Voltage —
Before proceeding with the
electrical connections, make certain that the
voltage, frequency, and phase of the supply
source are the same as those specifi ed on the unit
rating plate. Also verify that the service provided
by the utility is suffi cient to handle the additional
load imposed by this equipment.
See the unit wiring label for proper high and low
voltage wiring. Make all electrical connections
in accordance with all applicable codes and
ordinances.
Use a separate branch electrical circuit for this
unit. A means of electrical disconnect must be
located within sight of and readily accessibility
to the unit. Internally mounted circuit breakers
are available as fi eld installed options. These
circuit breakers can be used as an electrical
disconnect.
The unit is shipped from the factory wired for 240
volt transformer operation. For 208 volt operation,
remove the lead from the transformer terminal
marked 240V and connect it to the terminal
marked 208V. For maximum ampacity and over
current protection, see the unit rating plate.
Provide power supply (or supplies) for the unit in
accordance with the unit wiring diagram, and the
unit rating plate. Connect the line-voltage leads
to the corresponding terminals on the contactor
(or the circuit breaker when the fi eld installed
circuit breaker kits are used) inside the control
compartment. Use only copper wire for the line
voltage power supply to this unit. Use proper code
agency listed conduit and a conduit connector
for connecting the supply wires to the unit and
for obtaining proper grounding. Grounding may
also be accomplished by using the grounding
lug provided in the control box.
WARNING:
The unit cabinet must have and
uninterrupted or unbroken electrical
ground to minimize personal injury if
an electrical fault should occur. This
ground may consist of electrical wire
or approved conduit when installed in
accordance with existing national or
local codes.
Blower Speed —
For optimum system
performance and comfort, it may be necessary
to change the factory set speed. To change the
blower speed:
1. Disconnect all electrical power to the unit
and remove the blower panel.
2. Locate the orange and red wires
terminated to the blower motor. The
orange wire controls cooling operation
while the red wire controls heating
operation.
3. Verify the required speed from the airfl ow
data found in table 3. Place appropriate
wire on the appropriate motor speed tap
for the required airfl ow point.
NOTE: If the same speed is required for both
heating and cooling. Obtain the jumper wire
from the homeowners packet and connect it
to the blower relays at the NO & NC terminals.
Be sure to only connect the speed necessary
to one side of the jumper wire.
CAUTION:
To avoid personal injury or property
damage, make certain that the motor
leads cannot come into contact with
any uninsulated metal components
of the unit.
Check all factory wiring per the unit wiring
diagram and inspect the factory wiring connec-
tions to be sure none loosened during shipping
or installation.
Low Voltage Connections
Room Thermostat —
Several options are
available for a room thermostat depending on
