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CONTENTS
USER’S, MAINTENANCE
SAFETY INFORMATION . . . . . . . . . . . . . . . . 2
FOR YOUR SAFETY . . . . . . . . . . . . . . . . . . . . . . . 2
and
SYSTEM OPERATION . . . . . . . . . . . . . . . . . . 2
THERMOSTATS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INTERMITTENT IGNITION DEVICE . . . . . . . . . . . 2
SERVICE INFORMATION
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . 3
TO SHUT DOWN THE
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66441-YUM-D-1011 SAFETY INFORMATION SYSTEM OPERATION FOR YOUR SAFETY THERMOSTATS • Make sure that the furnace area is clear and free of com- Set your thermostat for either heating or cooling then set it for bustible materials, gasoline and other flammable vapors the desired temperature. DO NOT MOVE THE THERMO- and liquids. STAT RAPIDLY ON AND OFF, OR BACK AND FORTH FROM HEAT TO COOL. THIS COULD DAMAGE YOUR • Be sure the furnace is free and clear of insulating mate- EQUIPMENT. rial. Examine the f
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66441-YUM-D-1011 When the thermostat calls for heat, pilot gas is supplied and 5. The draft fan will operate. After an adequate purge time, at the same time, sparking occurs to light the pilot gas. With the electric spark igniter will light the burners. the pilot lit, the flame sensor rod closes a circuit to the ignitor control which then opens the gas valve to admit main burner 6. The burners will extinguish and relight automatically upon gas. the demand of the room thermostat. When the room
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66441-YUM-D-1011 If the furnace continues to lock out, a qualified service techni- bustion and ventilation. Adequate air is important to the safe cian should be called to determine the cause of the problem. and proper operation of the unit. HEATING SYSTEM INSPECTION It is the owner's responsibility to insure that an annual inspec- tion of the entire heating portion of the unit is made by a qual- ified service technician. This should include inspection of the ELECTRICAL SHOCK, FIRE OR EXPLOSION H
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66441-YUM-D-1011 12. When replacing the center and top of the flue collector box, CLEANING BURNERS be careful not to tear the adjoining insulation. Remove them from the furnace as explained in BURNER 13. Ensure that all seams on the vent side of the combustion INSTRUCTIONS section in the Unit Installation Instructions. system are air tight. Apply a high temperature (+500°F) Clean burners with wire brush and vacuum as needed. sealing compound where needed. CLEANING FLUE PASSAGES AND HEATING
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66441-YUM-D-1011 15 TON (2) 18" X 24" FILTERS 20 TON 15,20,25 TON REHEAT Excessive lubrication may accelerate the accu- (4) 16" X 20" INDOOR COIL FILTERS mulation of dust. 15 TON CONDENSATE DRAIN (3) 18" X 24" BLOWER ASSEMBLY CONNECTION FILTERS 20 TON Even with good filters properly in place, blower wheels and 15,20,25 TON REHEAT (4) 16" X 25" motors will become dust laden after many months of opera- FILTERS tion. The entire blower assembly should be inspected annu- 15, 20, 25 TON REHEAT UNITS 1
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CONDENSER COIL TROUBLESHOOTING An annual check and cleaning, if necessary, of the outdoor BEFORE CALLING A SERVICE PERSON: coil should be done. Cleaning should be as often as neces- sary to keep the coil clean. Clean any debris and dirt from the A. Check thermostat setting and insure thermostat is calling outside coil face with a brush being careful not to damage the for heat or cooling. fins. If extremely dirty, a hose can be used to wash the coil B. Check thermostat for lint, etc. from the in
