FULTON Vantage VTG Series Installation And Operation Manual page 79

SECTION 4
VTG-IOM-2016-1214
PROBLEM
Low Air Flow Supply indi-
cated on low air switch
Main flame failure during
firing period
Ignition Failure
Questions? Please Contact Your Local Manufacturer's Representative
CAUSE
Low Air is annunciated if the airflow switch detects
low airflow through the boiler.
Main gas control valve is de-energized and the con-
trol goes into "lockout" mode. Flame failure occurs
and the indicator is illuminated.
If UV scanner/flame rod does not detect the flame
during the 4-second trial-for-ignition period, the gas
valve and spark ignition are de-energized. At this
time a safety lockout occurs.
MAINTENANCE
CHECK
The air switch has been factory set and should not
be adjusted in the field.
An extended low air indication does not mean that
the low air switch is defective.
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 fire speed is correctly displayed on the
touch screen.
Check for obstructions in the vent.
Check for obstructions in the air inlet.
The programmer must be manually reset.
Identify and correct.
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