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High Voltage
Low Voltage
Figure 9. Power Entry
ELECTRICAL CONNECTIONS
1.
ELECTRICAL SERVICE
High Voltage
a.
Install a branch circuit disconnect of ad-
equate size per NEC. Locate the disconnect
within sight of the unit.
b.
Extend leads through power wiring hole
provided. Connect L1 and L2 directly to the
contactor. (See Figure 9).
c.
Ground the air conditioning unit using the
green grounding screw provided in the
control panel.
Low Voltage
a.
Route 24v control wires through the sealing
grommet near the power entrance.
b.
Connect the control wires to the leads in
the low voltage area. (See Figure 10).
2.
OVERCURRENT PROTECTION
In general, the best fuse or breaker for any air
conditioner is the smallest size that will permit
the equipment to run under normal use and
service without nuisance trips. Such a device,
sized properly, gives maximum equipment
protection. The principal reason for specifying
a time delay type is to prevent nuisance trips
when the unit starts.
In the event that a fuse does blow or a breaker
trips, always determine the reason. Do not arbi-
trarily put in a larger fuse or breaker and do not,
in any case, exceed the maximum size listed on
the data label of the unit.
3.
LOCATING THE THERMOSTAT
Locate the thermostat away from drafts and
slamming doors and place it where there is a free
fl ow of air. Mount on an inside wall approximately
fi ve feet from the fl oor.
Do not locate near a lamp, kitchen range, direct
sunlight, or in line with air fl ow from supply
registers.
a.
Connect Cooling Thermostat: The cool-
ing thermostat available for use with this
system is equipped with a selector switch.
To shut down the air conditioner, set the
selector switch to the OFF position. Con-
nect the red and yellow wires from the unit
to the R and Y terminals respectively on
the thermostat subbase. Connect the green
wire to the yellow wire at the unit. See the
instruction sheet packed with the thermostat
for detailed methods of mounting.
b.
Connect the Heat-Cool Thermostat: The
heat-cool thermostat is equipped with a
system HEAT-COOL switch, which provides
a positive means of preventing simultane-
ous operation of the heating and cooling
units. The thermostat is also equipped with
an ON-AUTO fan switch which allows the
home owner to operate the indoor blower
when air circulation is desired.
Connect the red, yellow, green and brown
low voltage wires to the R or RC, Y, G and
W terminals respectively on the thermostat
base. The black wire is the 24 volt common
required on some thermostats. See ther-
mostat instruction sheet for more detailed
information.
Refer to furnace installation instructions
for required connections and proper heat
anticipator setting when installing unit with
an external furnace.
c.
If two stage heating is desired, an
optional outdoor thermostat may be
installed: Connect the thermostat to the
orange low voltage wire and the W terminal
on the indoor thermostat base (See Figure
10). See the thermostat instructions for
details on setting the outdoor thermostat.
4.
ELECTRIC HEAT PACKAGE (OPTIONAL)
The air conditioner is shipped without an auxil-
iary electric heat kit installed. If electric heat is
desired, an accessory Heater Kit must be fi eld
installed. See Specifi cations Sheet for available
kits and their applications.
•
Select the correct size heat package for the
installation.
•
Follow installation instructions provided with
each heater kit.
•
Installation is most easily accomplished
before making duct or electrical connec-
tions.
•
The blower must be set to high speed for
electric heat operation.
9
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