BENSON 30 - Check Control

Doc No. 20-45-159 Page 57 of 60
Burner lights
on start gas
but fails to
establish
mail ame
Check gas
supply
Excess air
Check that
ue gas CO
is as advised
Adjust damper
to suit
Check inlet
gas pressure
Check main
burner gas
pressure
Low gas
pressure
Check ame
probe
Signal
Position
Check
burner
Check
control
Check
controls
Check main
burner gas
pressure
Check inlet
gas pressure
Burner starts
but excess
temperature
shuts down
the burner
on overheat
Insucient
air passing
over heat
exchanger
High return
(inlet) air
temperature
Check air to
inlet is not
restricted
Remove
obstruction.
Clean lter
Resistance
too high
Fan belt
slipping
Reset nozzles
away from
adjacent walls
Check for
warm air
short circuit
to air inlet
Impellor
slipping
Check outlet
grilles are open
Check nozzles
are open
Adjust and or
replace belts
Adjust and or
replace belts