6
C
OMPRESSOR
P
ROTECTION
D
EVICES
This gas/electric package unit includes components which are
designed to protect the compressor against abnormal operat-
ing conditions.
NOTE:
The operation of the indoor blower will not be affected by
any compressor protection devices.
If, during a call for cooling, the indoor fan runs and circulates
room temperature air while the compressor and outdoor fan do
not operate:
1. Wait five minutes, as a protection device may be holding the
compressor off.
2. Check the room thermostat to see if it is correctly set.
3. If the room thermostat is correctly set, call a qualified servicer
to determine if one of the compressor protection devices
has opened.
S
HORT
-C
YCLE
P
ROTECTOR
A short-cycle protector is built into the ignition control. Each time
the compressor is off for less than 3 minutes, the short-cycle
protector will delay compressor startup for up to 3 minutes. This
protects the compressor from improper operation.
On Dual Fuel units (GPD/APD), the short-cycle protector will
delay the compressor 5 minutes.
NOTE:
These units are not designed to provide mechanical
cooling at outdoor temperatures below 50°F. If low ambient
cooling is needed, consult a qualified servicer.
I
GNITER
The unit has an electronic ignition device which lights the
burners automatically. Never try to light the burners by hand. It
also has an induced draft blower to exhaust combustion prod-
ucts.
I
NDOOR
A
IR
C
IRCULATOR
B
LOWER
Keep the blower access door panel in place except for inspec-
tion and maintenance.
R
OUTINE
M
AINTENANCE
If you perform maintenance on the unit yourself, remember that
certain mechanical and electrical knowledge, skills and tools
are required to perform unit maintenance. Personal injury or
death may result If you are not properly trained. You should call
your installing dealer or place of purchase if you are uncertain
about your ability to perform maintenance.
A
NNUAL
I
NSPECTION
Your package unit should be inspected by a qualified installer,
or service agency at least twice every year. This check should be
performed before the heating and cooling seasons begin. This
will ensure that adequate combustion air is being drawn and the
vent system is working properly. Particular attention should be
paid to the following items. Repair as necessary.
• Check physical support of the unit. Ensure it is sound with-
out any sagging, cracks, or gaps, around the base.
• Check for obvious signs of deterioration of the unit.
• Flue Hood and Combustion Air Inlet. Check for blockage
(wasp nest, etc.) and corrosion.
Flue Hood
Combustion
Air Inlet
Flue Hood
• Return Air Connection. Check for physical soundness and
ensure that the connection is firmly sealed to the package
unit casing.
• Heat exchanger. Check for corrosion and/or obstructions
within the heat exchanger passageways.
• Burners. Check for proper ignition, burner flame, and flame
sense.
• Wiring. Check electrical connections for tightness and/or
corrosion. Check wires for damage.
• Filters. Check that filters are clean and in the proper place-
ment in the unit or duct system.
• Louvers. Inspect air inlet louvers inside the heat exchanger
compartments. Ensure the area is clean and free of dirt and
debris.
