Specifications

© The Fulton Companies 2012
MAINTENANCE VTG-IOM-2012-1001 SECTION 4
4-10
PROBLEM CAUSE CHECK
Low Air Flow Supply indi-
cated on low air switch
Low Air is annunciated if the air ow switch detects
low air ow through the boiler.
The air switch has been factory set and should not
be adjusted in the fi eld.
An extended low air indica on does not mean that
the low air switch is defec ve.
Check that blower is power and feedback plugs are
clipped into the blower.
Check that the burner is clean by observing
through the venturi. Check the blower purge speed
and low fi re speed is correctly displayed on the
touch screen.
Check for obstruc ons in the vent.
Check for obstruc ons in the air inlet.
High Back Pressure Switch
trip/boiler shutdown
Excessive Vent Pressure This condi on will automa cally recycle, so
the boiler will try to relight. The vent and heat
exchanger should be checked for obstruc ons and
cleaned.
Main fl ame failure during
fi ring period
Main gas control valve is de-energized and the con-
trol goes into “lockout” mode. Flame failure occurs
and the indicator is illuminated.
The programmer must be manually reset.
Igni on Failure If UV scanner/fl ame rod does not detect the fl ame
during the 4-second trial-for-igni on period, the gas
valve and spark igni on are de-energized. At this
 me a safety lockout occurs.
Iden fy and correct.