Installation guide

Usingextremecaution,applypowertotheunit
and inspectthe wiringfor evidenceof open,
shorted,and/orimproperlywiredcircuits.
Functional Checkout:
CAUTION:
If equipped with a compressor
crankcase heater, wait 24 hours prior to
performing a function checkout to allow
for heating of the compressor
crankcase. Failure to comply may result
in damage and could cause premature
failure of the system.
Indoor Blower -- Set the thermostat function
switch to COOLING and the fan switch to ON.
Verify that the indoor blower is operating and
that airflow is not restricted. Set the fan switch
back to AUTO.
Low-Pressure Switch -- A low-pressure
switch is factory-installed in select models
only. If provided, this switch is located in the
suction line internal to the outdoor unit. The
switch is designed to protect the compressor
from a loss of charge. Under normal condi-
tions, the switch is closed. If the suction pres-
sure falls below 5 psig, then the switch will open
and de-energize the outdoor unit. The switch
will close again once the suction pressure
increases above 20 psig. Please note that the
switch interrupts the thermostat inputs to the
unit. Thus, when the switch opens and then
closes, there will be a 5 minute short cycling
delay before the outdoor unit will energize.
Cooling -- Gradually lower the thermostat
temperature setpoint below the actual room
temperature and observe that the outdoor unit
and indoor blower energize. Feel the air being
circulated by the indoor blower and verify that it
is cooler than ambient temperature. Listen for
any unusual noises. If present, locate and
determine the source of the noise and correct as
necessary.
Short Cycle Protection (Select models
only) -- With the system operating in COOL-
ING mode, note the setpoint temperature set-
ting of the thermostat, and gradually raise the
setpoint temperature until the outdoor unit and
indoor blower de-energize. Immediately lower
the setpoint temperature of the thermostat to its
original setting and verify that the indoor blower
is energized and that the outdoor unit remains
de-energized. Verify that, after approximately
5 minutes, the outdoor unit energizes and that
the temperature of the air supplied to the facility
is cooler than ambient temperature.
Heating -- If provided with heating equipment,
lower the thermostat setpoint temperature to
the lowest obtainable setting and set the ther-
mostat function switch to HEATING. The indoor
blower and outdoor unit should stop running.
Increase the setpoint temperature of the ther-
mostat to the maximum setting. Verify that the
heating equipment has been energized (i.e.,
fossil fuel burner operating, etc.) and that the
indoor blower energizes after a short period of
time. Feel the air being circulated by the indoor
blower and verify that it is warmer than ambient
temperature. Listen for any unusual noises. If
present, locate and determine the source of the
noise and correct as necessary.
Orifice Usage
12 SEER Split System Air Conditioner
Restrictor System Charge
Size (In.) R-22 oz.
Model
Number
1-1/2 Ton
2 Ton
2-1/2 Ton
3 Ton
3-1/2 Ton
4 Ton
5 Ton
0.060
0.063
0.068
0.077
0.085
0.090
0.099
88
96
113
118
125
130
145