ML193DF Gas Furnace Installation Manual - Lennox

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Troubleshooting: Continuous Fan Sequence of Operation CONTINUOUS HEAT SPEED FAN SEQUENCE OF OPERATION LED: SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT SEQUENCE. MANUAL FAN SELECTION MADE AT THERMOSTAT. CONTROL (G) ENERGIZES SYSTEM FAN AT HEAT SPEED. EAC TERMINAL IS ENERGIZED. THERMOSTAT CALLS FOR HEAT (W). NO YES HUM TERM. ENERGIZES WITH COMB. AIR INDUCER. THERMOSTAT CALLS FOR COOLING. YES SYSTEM FAN SWITCHED TO COOL SPEED. EAC TERM. REMAINS ON. NO SYSTEM FAN REMAINS ON HEATING SPEED. THERMOSTAT OPENS. THERMOSTAT OPENS. HUM TERM. DE−ENERGIZES WITH COMB. AIR INDUCER MANUAL FAN SELECTION MADE AT THERMOSTAT. CONTROL (G) ENERGIZES SYSTEM FAN AT HEAT SPEED. EAC TERM. ENERGIZED. SYSTEM FAN REMAINS ON HEATING SPEED. Page 48
Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate −− Example: ML193DF04536B. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier. Cabinet Parts Upper access panel Blower access panel Top Cap Control Panel Parts Transformer Integrated control board Door interlock switch Blower Parts Blower wheel Motor Motor mounting frame Motor capacitor Blower housing cutoff plate Heating Parts Flame Sensor Heat exchanger assembly Gas manifold Combustion air inducer Gas valve Main burner cluster Main burner orifices Pressure switch Ignitor Primary limit control Flame rollout switches Page 49
Page 1 and 2: 2010 Lennox Industries Inc. Dallas,
Page 3 and 4: ML193DF Parts Arrangement CONTROL B
Page 5 and 6: NOTE − Furnace must be adjusted t
Page 7 and 8: All gas-fired appliances require ai
Page 9 and 10: ML193DF09048C BLOWER MOTOR RIGID LE
Page 11 and 12: TABLE 2 COMBUSTIBLE FLOORING BASE O
Page 13 and 14: IMPORTANT ML193DF exhaust and intak
Page 15 and 16: 2 − When furnace is installed in
Page 17 and 18: TYPICAL EXHAUST PIPE CONNECTIONS Pi
Page 19 and 20: VENT TERMINATION CLEARANCES FOR NON
Page 21 and 22: Details of Intake and Exhaust Pipin
Page 23 and 24: FIELD SUPPLIED WALL TERMINATION OR
Page 25 and 26: If intake and exhause pipe is less
Page 27 and 28: UNCONDITIONED SPACE 6" (152mm) Max
Page 29 and 30: OPTIONAL Condensate Drain Connectio
Page 31 and 32: MANUAL MAIN SHUT−OFF VALVE (With
Page 33 and 34: Left side INTERIOR MAKE−UP BOX (F
Page 35 and 36: TYPICAL ML193DF WIRING DIAGRAM FIGU
Page 37 and 38: Placing the furnace into operation:
Page 39 and 40: TABLE 14 Conversion Kit and Pressur
Page 41 and 42: BLOWER DATA ML193DF045P36B PERFORMA
Page 43 and 44: 19 − Reinstall heat exchanger int
Page 45 and 46: Troubleshooting: Heating Sequence o
Page 47: Troubleshooting: Cooling Sequence o
Page 51 and 52: 1 UNIT OPERATION HEATING MODE GAS M

ML193DF Gas Furnace Installation Manual - Lennox

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