Contact your dealer if you desire more information about this important safety feature.
Should any unusual conditions be observed during your inspections, call an authorized service dealer immediately.
Return Air
All return air duct connections must be tight and sealed to unit cabinet. Supply and return air registers must be open when the unit is in operation. Obstructions must not be allowed to block airflow in or out of the registers.
Filters
Air filters are to be used with this heating/cooling unit. Filters are not factory supplied in the unit. However,
Minimum Required Surface Area
for Disposable Filters
Table 1
the return air compartment includes provisions that allow filters to be installed within the unit. Otherwise, a filter must be installed in the duct work by the installer. Filters must always be installed ahead of the evaporator coil and must be kept clean or replaced. Dirty filters will reduce the airflow of the unit. Filters should be sized in accordance with Table 1.
Outdoor Coil
Leaves and other large obstructions should be carefully removed from the outdoor coil surfaces without damaging the fin surface of the coil.
Lubrication
Lubrication of the bearings in the circulating air blower motor and the combustion blower motor is not recommended.
Blower Assembly
Even with good filters properly in place, blower wheels and motors will become dust laden after long months of operation. The entire blower assembly should be inspected annually. If the motor and wheel are heavily coated with dust, they can be brushed and cleaned with a vacuum cleaner.
Typical Flame Appearance
Figure 3
Burner Flame
While the unit is in operation, observe the burner flames. Compare these observations to Figure 3 to determine if proper flame adjustment is present. If your observations indicate improper flame adjustment, call your authorized service dealer for service. Do not attempt to adjust flame! Your service representative will perform this adjustment correctly.
Rollout Switch
This unit is equipped with a manual reset high temperature sensor or rollout switch. In the unlikely event of a sustained burner flame rollout, the rollout switch will shut off the flow of gas by closing the gas valve. The switch is located inside the gas burner area. Flame rollout can be caused by blockage of the power vent system, a blocked heat exchanger, or improper gas pressure or adjustment. If this event occurs, the unit will not operate properly. The gas supply to the unit should be shut off and no attempt should be made to place it in operation. The system should be inspected by a qualified service technician.
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