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RUN
BLOWER
IGNITION TR
L
PILOT VALVE
O
A
D
MAIN VALVE
ALARM
HIGH
DAMPER
LOW
AIR FLOW SW
FLAME SIGNAL
POWER
I
PRE/POST-PURGE
N
D
IGNITION TRIAL
I
C
PILOT ONLY
A
M-TRI/M-STA
T
I
RUN
O
N
FLAME
ALARM
Fig. 7: Flame failure during run period
Power SW ON
BLOWER
IGNITION TR
L
PILOT VALVE
O
A
D
MAIN VALVE
ALARM
HIGH
DAMPER
LOW
AIR FLOW SW
FLAME SIGNAL
POWER
I
PRE/POST-PURGE
N
D
IGNITION TRIAL
I
C
PILOT ONLY
A
M-TRI/M-STA
T
I
RUN
O
N
FLAME
ALARM
Fig. 8: When false flame signal is generated during standby
Flame
Lockout
Failure
Post-Purge
Error Confirmation
20 SEC
Lockout
Error Confirmation
ENS7003R0 KO06 2010
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