Lennox ML193DFE Series Unit Information page 10

B-Heating Components
Combustion air inducer (B6), primary limit control (S10),
SureLight ignitor, burners, flame rollout switch (S47), gas
valve (GV1), combustion air prove switch (S18), and clam-
shell heat exchangers are located in the heating compart-
ment. The heating compartment can be accessed by re-
moving the burner access panel.
ON
OFF
DEMAND
CAI
IGNITOR
GAS VALVE
INDOOR BLOWER
*Blower on time will be 30 seconds after flame is sensed. Blower off time will depend on "OFF TIME" Setting.
IGNITOR
ROLLOUT
SWITCHES
SENSOR
ELECTRONIC IGNITION
1 15
Pre -Purge Ignitor Warm-up
34
38
Trial for
Blower "On"*
Ignition
Delay
FIGURE 6
Burner Box Assembly
GAS VALVE
FIGURE 7
Page 10
80 5 SEC
Post
Purge
BURNERS