FloAire Compact Direct Fired Heater - Manual (Page 15)

15
Adjust pilot flame.
Lock unit into
high fire.
Adjust
incoming gas
pressure.
Does high fire produce
at least a 70°F temp
rise and produce the
correct manifold
pressure?
Adjust high fire
No
Lock unit into low fire.
Yes
Does thin flame fill
entire burner length?
Adjust low
fire.
Setting incoming pressure:
Presure must be measured at first "T" in
supply gas line before the first gas valve.
Adjusting the pilot:
To adjust the pilot flame, remove the cap
from the pilot adjustment screw on the
combination gas valve. Increase the pilot
gas flow by turning the screw counter-
clockwise. Decrease the pilot gas flow by
turning the screw clockwise.
Adjusting high fire:
High fire manifold pressure should be 5"
maximum for natural gas and 2.5"
maximum for propane. High fire should
produce at least a 70°F temperature rise.
Remove wire #4 from the Maxitrol 14
amplifier (#2 and #4 for Maxitrol 44). This
will drive the valve into its full open
position. Adjust high fire with the
regulator inside the unit. Turn clockwise
to increase temperature rise. Replace the
wires on the Maxitrol Amplifier.
Adjusting low fire:
Remove wire #5 from the Maxitrol 14
amplifier (#8 for Maxitrol 44). This will
drive the valve into its lowest position.
Adjust the low fire by turning the low fire
bypass screw on the side of the M411
modulating valve. Refer to the included
Maxitrol literature for more detailed
information. Ensure that the enite length
of burner is filled with a thin flame.
Yes
No
No
Burner start up
complete.
Yes
Is incoming gas pressure
5"-14"?
Heater Start Up Summary