step 2 before touching control or wires.
4.Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.
DIAGNOSTIC CHART
WARNING
TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE PERFORMING ANY SERVICE OR MAINTENANCE.
Refer to the Troubleshooting Chart at the end of this manual for assistance in determining the source of unit operational problems. The red diagnostic LED blinks to assist in troubleshooting the unit. The number of blinks refers to a specific fault code.
RESETTING FROM LOCKOUT
Furnace lockout results when a furnace is unable to achieve igni- tion after three attempts. It is characterized by a
1.Automatic reset. The integrated control module will automatically reset itself and attempt to resume normal operations following a one hour lockout period.
2.Manual power interruption. Interrupt 115 volt power to the furnace for 0 - 20 seconds.
3.Manual thermostat cycle. Lower the thermostat so that there is no longer a call for heat then reset to previous setting. Interrupt thermostat signal to the furnace for 0 - 20 seconds.
NOTE: If the condition which originally caused the lockout still exists, the control will return to lockout. Refer to Section XVIII, Troubleshooting - Diagnostic Chart for aid in determining the cause.
XIX. MAINTENANCE
WARNING
TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE PERFORMING ANY MAINTENANCE. IF YOU MUST HANDLE THE IGNITER, HANDLE WITH CARE. TOUCHING THE IGNITER ELEMENT WITH BARE FINGERS, ROUGH HANDLING, OR VIBRATION COULD DAMAGE THE IGNITER RESULTING IN PREMATURE FAILURE. ONLY A QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITER.
ANNUAL INSPECTION
The furnace should be inspected by a qualified installer, or service agency at least once per year. This check should be performed at the beginning of the heating season. This will ensure that all fur- nace components are in proper working order and that the heating system functions appropriately. Pay particular attention to the fol- lowing items. Repair or service as necessary.
•Flue pipe system. Check for blockage and/or leakage. Check the outside termination and the connections at and internal to the furnace.
•Heat exchanger. Check for corrosion and/or buildup within the heat exchanger passageways.
•Burners. Check for proper ignition, burner flame, and flame sense.
•Drainage system. Check for blockage and/or leakage. Check hose connections at and internal to furnace.
•Wiring. Check electrical connections for tightness and/or corrosion. Check wires for damage.
•Filters.
FILTERS
CAUTION
TO ENSURE PROPER UNIT PERFORMANCE, ADHERE TO THE FILTER SIZES
GIVEN IN THE RECOMMENDED MINIMUM FILTER SIZE TABLE OR
PRODUCT DATA BOOK APPLICABLE TO YOUR MODEL*.
MAINTENANCE
Improper filter maintenance is the most common cause of inad- equate heating or cooling performance. Filters should be cleaned (permanent) or replaced (disposable) every two months or as re- quired. When replacing a filter, it must be replaced with a filter of the same type and size.
FILTER REMOVAL
Depending on the installation, differing filter arrangements can be applied. Filters can be installed in either the central return register or a side panel external filter rack (upflow only). A media air filter or electronic air cleaner can be used as an alternate filter. Follow the filter sizes given in the Recommended Minimum Filter size table to ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow installation, follow the directions provided with external filter rack kit. To remove internal filters see Internal Filter Removal section. Internal filters are an accessory item and are not included with your furnace. For further details, see your distributor.
HORIZONTAL UNIT FILTER REMOVAL
Filters in horizontal installations are located in the central return register or the ductwork near the furnace.
To remove:
1.Turn OFF electrical power to furnace.
2.Remove filter(s) from the central return register or ductwork.
3.Replace filter(s) by reversing the procedure for removal.
4.Turn ON electrical power to furnace.
MEDIA AIR FILTER OR ELECTRONIC AIR CLEANER REMOVAL
Follow the manufacturer’s directions for service.
BURNERS
Visually inspect the burner flames periodically during the heating season. Turn on the furnace at the thermostat and allow several minutes for flames to stabilize, since any dislodged dust will alter the flames normal appearance. Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they must not be yellow). They should extend directly outward from the burners with- out curling, floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.
INDUCED DRAFT AND CIRCULATOR BLOWERS
The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufacturer. No further lubrication is required. Check motor windings for accumulation of dust which may cause overheating. Clean as necessary.
*NOTE: Please contact your distributor or our website for the applicable product data book referred to in this manual.
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