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S9360B, S9361B, S9370B, S9371B, S9380B, S9381B INTEGRATED WATER HEATER CONTROLLERS
ALL OUTPUTS OFF
CALL FOR HEAT
CHECK LEAKAGE/
CALL FOR
SET FLAME BIAS
HEAT LOST
SWITCH CLOSE
LIMIT SWITCH CLOSE
CHECK DAMPER/
PRESSURE SWITCH OPEN
DRIVE DAMPER/INDUCER
WAIT FOR SWITCH CLOSE
SWITCH OPEN
TIME OUT
A
TURN PILOT VALVE ON
FLAME SENSED
STOP SPARKING
FLAME PROVED
FLAME STABILIZATION
TURN MAIN VALVE ON
CALL FOR HEAT LOST OR LIMIT OPEN
B
START
IDLE
BIAS DONE
WAIT LIMIT
LIMIT
SWITCH
OPEN
SWITCH OPEN
SWITCH CLOSE
FLAME DEB ON
PREPURGE
FLAME DEB OFF
TIME OUT
SPARK
TIME OUT
PROVE FLAME
B
DAMPER/PRESSURE
SWITCH OPEN
TIME OUT
FLAME LOST
RUN
FLAME DEB ON
POSTPURGE
FLAME DEB OFF
Fig. 12. Operating sequence - S938X.
17
TIME OUT OR
MANUAL RESET
SOFT
CHECK FLAME
TIME OUT
LOCKOUT
PRE-TRIAL
RETRY
TIME OUT
A
DELAY
TIME
RECYCLE DELAY
OUT
CHECK FLAME
POST-TRIAL
TIME OUT
A
M29795
69-1792—09
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