Honeywell 7800 SERIES EC7895A Product Data page 28

7800 SERIES EC7895A, RM7895A RELAY MODULE
NOTE: Normal sequences are in bold type, while abnormal sequences are not in bold type.
Sequence
If the EC7895 or RM7895 is in a HOLD condition, the following conditions could exist:
PURGE HOLD: F/G (Flame Detected)
PURGE HOLD: T7 (Airflow Interlock)
PILOT IGN
If the EC7895 or RM7895 is in a HOLD status, the following condition could exist:
MAIN IGN
RUN
RUN
RESET/ALARM TEST
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Table 6. Sequence And Status Hold Information. (Continued)
The LEDs indicate the burner status, POWER and FLAME, and that a flame
is detected. The burner sequence does not advance through PREPURGE
because a flame is detected as being present. The sequence holds, waiting
for the flame signal to clear. If the time exceeds 30 seconds, the EC7895 or
RM7895 locks out.
The LED indicates the burner status, POWER, and that the Air-flow Interlock
is not closed. The sequence does not advance to ignition until the Airflow
Interlock proves closed. If this time exceeds a 30 second HOLD, the
EC7895 or RM7895 locks out.
The LEDs indicate the burner status, POWER, PILOT and FLAME, which is
the period of time the EC7895 or RM7895 permits the pilot valve to be open
and the pilot flame to be established.
The LEDs indicate the burner status, POWER, PILOT, FLAME and MAIN,
which is the period of time the EC7895 or RM7895 permits the main valve to
be open and the main flame to be established.
The LEDs indicate the burner status, POWER, PILOT, FLAME and MAIN,
which is the period of time after the Ignition Trials and before the operating
controller set point is reached. During this time, the burner is firing under the
control of the operating controller (EC7895 or RM7895A).
The LEDs indicate the burner status, POWER, FLAME and MAIN, which is
the period of time after the Ignition Trials and before the operating controller
set point is reached.
The LED indicates the burner status, POWER and ALARM. This condition
indicates the reset push button is pressed. If it is held for more than four
seconds, the alarm output is energized. The alarm output will be de-
energized after the reset pushbutton is released.
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