TM 5-3895-374-24-2
COMBINATION FUEL BURNERS
NOTE: An important safety feature of
the FLAME-MONITOR system is the
ability to monitor the proper timed
operation of critical terminals, Fuel
valve terminals 5, 6 and 7 for
instance.
Jumpering
of
these
terminals could therefore cause the
control
to
sense
an
unusual
condition and LOCKOUT.
When changing fuels on combination fuel burners if
Direct SPARK IGNITION is used, it is normal to jumper
these terminals. To assure that burner operation is not
interrupted in this situation, you must do one of the
following:
1.
Interrupt power to L1/L2 momentarily when
changing fuels, before the initial burner cycle on
the new fuel.
2.
Install a time delay relay contact or in the jumper
circuit which is timed to close 3 seconds
(minimum) after the terminal 6 is energized.
This method is only acceptable on programmers
labeled "12" or higher (i.e. datecode 8710-12).
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