18-EB32D1-1E-EN
29
If control lock out occurs, the control (IGN) will retry a
complete ignition sequence in 1 hour.
The control (IGN) can be reset by removing power to
the unit or by turning the thermostat from ON to OFF
for approximately three seconds, then back ON.
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With the comfort control set to COOL and the fan set to
AUTO, the compressor contactor (CC) and the indoor
fan motor (IDM) are energized.
The energized compressor contactor (CC) completes
the circuit to the compressor (CPR) and a secondary
circuit to the outdoor fan motor (ODM). If the
compressor safety controls are closed, the compressor
(CPR) will operate with the outdoor fan motor (ODM).
The indoor fan motor (IDM) will operate. The
thermostat will continue to cycle the compressor and
fans to maintain the desired temperature.
With the comfort control fan set to ON, the indoor fan
motor (IDM) will continue to run at constant circulation
regardless of compressor and condenser fan operation.
Maintenance
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Some of the periodic maintenance functions of the
packaged unit can be performed by the owner; this
includes replacing the disposable or cleaning the
permanent air filters, cleaning the unit cabinet, and
conducting a general unit inspection on a regular basis.
F
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When the system is in constant operation, inspect the
filters at least once each month.
If you have disposable-type filters, replace them with
new filters of the same type and size. Do not attempt to
clean disposable filters.
Permanent-type filters can be cleaned by washing them
with a mild detergent and water. Make sure that the
filters are thoroughly dry before reinstalling them.
N
No
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e:: It may be necessary to replace permanent filters
annually if washing fails to clean the filter or if
the filter shows signs of deterioration. Be sure to
use the same type and size as was originally
installed.
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Be sure to keep all vegetation and debris away from the
condenser coil area.
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Service maintenance should be performed by qualified
service personnel.
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To keep the unit operating safely and efficiently, the
manufacturer recommends that a qualified service
technician check the entire system at least once each
year or more often if needed. The service technician
should examine these areas of the packaged unit:
•
filters (for cleaning or replacement)
•
motors and drive system components
•
economizer gaskets (for possible replacement)
•
safety controls (for mechanical cleaning)
•
electrical components and wiring (for possible
replacement and connection tightness)
•
condensate drain (for proper sealing and cleaning)
•
unit duct connections (to see that they are
physically sound and sealed to the unit casing)
•
unit mounting support (for structural integrity)
•
the unit (for obvious unit deterioration)
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Complete the following unit inspections and service
routines described at the beginning of each heating
season.
•
Visually inspect the unit to ensure that the airflow
required for combustion and condenser coil is not
obstructed from the unit.
•
Inspect the control panel wiring to verify that all
electrical connections are tight and that the wire
insulation is intact.
•
Check the operation of the gas ignition system as
follows: Turn off the gas supply with the unit
operating to verify that the gas valve closes and
that a re-ignition cycle is initiated by the unit.
•
Visually inspect the inside of the burners and the
burner ports for deposit buildup and corrosion.
Wipe and brush the inside of the burner and the
burner ports and then clean with a dry cloth. If the
deposit buildup or corrosion is excessive, replace
the burners.
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1. Connect a manometer to the pressure tap at the
outlet side of the unit’s gas valve (remove the
Control/Heat access panel). Read the manifold
pressure with the burners firing. See for gas valve
connections.
2. If the manifold pressure reading does not match the
value indicated on the unit's nameplate, the unit's
pressure regulator must be adjusted as follows:
a. Remove the cover screw on the gas regulator
located on the front side of the unit’s gas valve.
b. Turn the adjusting screw clockwise to increase
manifold pressure or counterclockwise to
decrease manifold pressure.
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