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of the appliance be kept clean. PILOT FLAME ADJUSTMENT 3/8 TO 1/2 INCH PILOT FLAME SHOULD ENVELOP 3/8 TO 1/2 INCH OF THE TIP OF THE GENERATOR. 2. If the appliance has been equipped with the optional WFF81-C fan kit assembly, the bearings of the motor should be oiled every six months with approximately 2 drops of S.A.E. 20 oil. 3. The appliance area must be kept clear and free of any combustible materials, gasoline and other flammable vapors and liquids. 4. It is essential that the flow of combustion and ventilation air not be obstructed. 5. Periodic examination of the entire ventilation system as a routine part of the safety performance check is recommended on an annual basis. BURNER FLAME ADJUSTMENT - STAINLESS STEEL BURNER 1. FLAME TOO SOFT - Yellow 2. FLAME TOO HARD - Deep Blue 3. NORMAL FLAMES Flame. Open air shutters until Coloration. Closing air shutters yellow tipping disappears. to a point where yellow tipping begins, re-open slightly to eliminate yellow tipping. Air shutter adjustment is now correct. Air Shutter 1 2 3 NOTE: It is advised that the burner flames be checked at least twice during the heating season for any changes in burner characteristics. Vacuum burner compartment at start of heating season or as often as needed. Page 12 MODEL WFF81-C OPTIONAL FAN KIT INSTALLATION INSTRUCTIONS NOTE: This fan kit is to be installed after installation of wall furnace and with the wall furnace front panel in place. STEP 1. This appliance, when installed, must be electrically grounded in accordance with local codes, or in the absence of local codes, with the latest edition of the National Electric Code, ANSI/NFPA No. 70. In Canada, see the current Canadian Electrical Code CSA C22.1. STEP 2. Set fan kit on top of the wall furnace front panel. Using the back top edge of the fan kit cabinet as a guide, mark a horizontal line across the wall. Mark a small vertical line which aligns with the slot located toward the rear of the fan kit casing. STEP 3. Using the four one inch screws provided, secure the wall mounting bracket to wall 1/8” below the horizontal line. Fan attachment bracket must be up and threaded nut sert aligned with the small vertical line. Note: Anchors (not provided) may be required. STEP 4. Remove junction box and connect 115v power supply in accordance with the wiring diagram. Replace junction box. STEP 5. Set fan kit on top of wall furnace front panel. Slot should align with the nut sert. Secure fan kit to wall mounting bracket with thumb screw provided. Thumb Screw Threaded Nut Sert Slot Wiring Diagram Fan Attachment Bracket Wall Mounting Bracket One Inch Screw (4) Junction Box Fan Kit Wall Furnace Front Panel Page 13 WFF81-C WIRING SCHEMATIC Ground L1 Black L2 White 115 VAC 115 VAC WHITE BLACK BLACK FAN SWITCHWHITE MOTOR BLACK BLACK BLACK GREEN GROUND WIRE L2 115 VAC 60 HZ - Less than 12 Amps. If any of the original wire as White supplied with this appliance must be replaced, it must be replaced with L1 type thermoplastic 105 degree C wire or its equivalent. Black Page 14 TROUBLE SHOOTING CHART for qualified serviceman - MAIN BURNER SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION Flame too large 1. Defective operator section of gas valve. 1. Replace complete valve. 2. Burner orifice too large. 2. Check with local gas company for proper orifice size and replace. 3. If installed above 2,000 ft. 3. Refer to orifice chart, Page 3. Flame pops back 1. Too much primary air. 1. Adjust air shutter. (See Page 12). Noisy Flame 1. Too much primary air. 2. Noisy pilot. 3. Burr in orifice (if it whistles or resonates). 4. Excessibe gas input. 1. Adjust air shutter. (See Page 12). 2. Reduce pilot gas with adjusting screw on combination gas control valve. 3. Remove burr or replace orifice (Do not enlarge orifices). 4. See “Flame Too Large” above. Yellow tip flame (some yellow tipping on L.P. gas is permissible) 1. Too little primary air. 2. Clogged main burner ports. 3. Clogged draft hood. 4. Linted up air shutter. 1. Adjust air shutter. (See Page 12). 2. Clean main burner ports. (Do not enlarge ports). 3. Clean draft hood. 4. Check for dust or lint at air mixer opening and around the shutter. Clean as necessary. Floating Flame 1. Blocked venting. 2. Insufficient primary air. 1. Clean flue passageways to remove blockage. 2. Adjust air shutter to increase primary air supply. (See Page 12). Gas Odor 1. Gas leak. 2. Chimney or flue obstruction. 3. Drafts around appliance. 1. Shut off gas service immediately. Check piping. Call gas company. (See Page 1). 2. Clean flue. 3. Eliminate drafts. Delayed Ignition 1. Pilot flame too small. 2. Burner ports clogged near pilot. 3. Low gas pressure. 4. Pilot decreases in size when main burners come on. 5. Air shutter open too far. 6. Drafts around appliance. 7. Bad venting. 1. Check pilot orifice, increase pilot gas flow if necessary by adjusting inlet pressure. 2. Clean burner ports (Do not enlarge ports). 3. Check gas supply pressure. 4. Supply piping is inadequately sized....

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