5-8
Figure 4
The air/gas mixture is properly adjusted when the burner manifold pressure is in accordance with the
applicable table on page 2-7 and the burners display a bright orange-red glow. If a blue flame is
observed, or if there are dark spots on a burner face, the air/gas mixture requires adjustment.
On the side of the blower housing opposite the motor is a plate with one or two locking nuts. Loos-
en the nut(s) enough to allow the plate to be moved, then adjust the position of the plate to open or
close the air intake opening until a bright orange-red glow is obtained. Carefully hold the plate in
position and tighten the locking nut(s).
TYPICAL BLOWER ASSEMBLY
SOME CE BLOWER ASSEMBLIES
MAY BE CONFIGURED THIS WAY
Right
Viewing
Port
Left viewing
port is behind
motor
(NOTE: Blower
shield omitted
for clarity.)
