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e. Use only your hand to push in the gas control lever. Never use tools. If the lever will not push in by hand, don’t try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion. f. Do not use this furnace if any part has been under water. Immediately call a qualified service technician to inspect the furnace and to replace any part of the gas valve or control system which has been under water. LIGHTING INSTRUCTIONS FOR STANDING PILOT MODELS. a. Stop! Read the safety information. b. Set the thermostat to the lowest setting. c. Turn off all electric power to the appliance. d. Push in the gas control lever slightly and move left to “OFF.” DO NOT FORCE. e. Wait ten (10) minutes to clear out any gas. If you then smell gas, STOP! Follow step “d” in the SAFETY INFORMATION. If you don’t smell gas, go to the next step. f. Find pilot - follow metal tube (pilot tube) from gas control valve. Open hinged fire observation door. The pilot is found at the end of the pilot tube just left of the pilot shield. g. Slightly depress the gas control lever and move it right to the “ON” position and release; then move it to the “PILOT” position. h. Move the control lever to “SET” and hold. Immediately light the pilot with a match. Continue to hold the control lever for about one (1) minute after the pilot is lit. Release the lever and it will spring back to the “PILOT” position. Pilot should remain lit. If it goes out, repeat steps “d” through “h” above. If the lever does not spring back when released, stop and immediately call your service technician or gas supplier. If the pilot will not stay lit after several tries, move the gas control lever to “OFF” and call your service technician or gas supplier. i. Move the gas control lever left to “ON”. j. Turn on all electric power to the furnace. Set the thermostat to “Heat” and/or the desired temperature setting. Set the On-Off-Fan switch to “ON”. k. Replace the furnace door. ! WARNING: ! WARNING: Close hinged fire door. If fire door is open or spring is broken it may allow products of combustion into the living space by the furnace blower resulting in possible asphyxiation. In the event of any flashback or explosion, immediately shut off the furnace and call your service technician. TO TURN OFF GAS TO APPLIANCE: a. Set the thermostat to the lowest setting. b. Turn off all electric power to the appliance at breaker or fuse box, before servicing. c. Remove the furnace door. d. Push in the gas control lever slightly and move to the left to “OFF.” DO NOT FORCE. e. Replace the furnace door. SEQUENCE OF OPERATION FOR STANDING PILOT a On a call for heat, the thermostat contacts close, supplying 24 VAC to the gas valve. b. When the gas valve is energized it steps open at a reduced flow and opens fully after approximately 14 seconds. c. When the call for heat is satisfied the thermostat contacts open, the gas valve shuts off gas flow. SEQUENCE OF OPERATION FOR STANDING PILOT W/INDUCED DRAFT BLOWERS MODELS a. On a call for heat, the thermostat contacts close, supplying 24 VAC to the relay. b. The relay contacts close and energize the induced draft motor. c. When the inducer starts, the air pressure switch closes at -0.20”WC differential pressure and energizes the gas valve. d. When the gas valve is energized it steps open at a reduced flow and opens fully after approximately 14 seconds. Gas Control Lever Pilot Adjustment Pilot Bracket Figure 28. Standing Pilot Valve Figure 29. Lighting Furnace e. When the call for heat is satisfied the thermostat contacts open, the gas valve shuts off gas flow, and the induced draft blower stops. GENERAL-DIRECT IGNITION MODELS Read safety information on front page of these installation instructions before operating furnace. DO NOT ATTEMPT TO OPERATE FURNACE IF YOU SMELL GAS. Operating instructions for M1M — MODELS WITH DIRECT IGNITION: a. STOP! Read the SAFETY INFORMATION. b. Set the thermostat to the lowest setting. c. Turn off all electric power to the appliance. d. This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. e. Honeywell - push in the gas control knob and turn clockwise to “OFF.” Robertshaw - push the gas control lever to “OFF.” NOTE: The lever cannot be placed in the “OFF” position unless it is pushed in slightly. DO NOT FORCE (See Figures 30 & 31). Gas Control GAS CONTROL KNOB Figure 30. Direct Ignition Gas Valve - Honeywell Figure 31. Direct Ignition Gas Valve - Robertshaw f. Wait ten (10) minutes to clear out any gas. If you smell gas, STOP! and follow step “d” in the SAFETY INFORMATION section. If you do not smell gas, go to the next step. g. Set the On-Off switch to the “ON” position. h. Honeywell - turn knob on gas control counter clockwise to “ON.” Robertshaw - push the gas control lever to “ON.” i. Turn on all electric power to the appliance. j. Replace the furnace door. k. Set the thermostat to “HEAT” and the...

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