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Usingextreme caution, a pplypowertothe unit
and inspectthe wiringfor evidenceof open,
shorted, a nd/orimproperly wiredcircuits.
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
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