10
D.
Examination of Flue Product Carrying Areas
.
1.
Boiler
Flue passageways in the boiler sections should be
checked annually for any blockage or accumulation
of soot. A think layer of soot on the flue gas
passageways will affect heat transfer substantially.
The resultant loss in efficiency will have a direct
bearing on increased fuel consumption.
Blockage of the flues is hazardous. If severe, carbon
monoxide concentrations could be lethal during the
burning cycle. Flames could roll outside the jacket
creating a fire hazard. The heat concentration could
severely damage the base, warp the burners, melt
the pilot tubing and wire insulation and destroy the
ignition module inside the jacket vestibule.
To obtain access to the flue cleanout panels, which
are installed on both the front and rear of the boiler,
the upper front and upper rear jacket panels must be
removed.
If access to the flue cleanout panels facing the front
of the boiler is required, the front vestibule panel
must be removed. See Figure 11.
Remove the Front Cleanout Panels first by removing
the upper and lower nuts and washers securing these
panels to the boiler sections, see Figure 11.
CARE SHOULD BE EXERCISED IN
REMOVING THE CLEANOUT PLATES FROM
THE BOLTS SO THAT THE INSULATION IS
NOT DAMAGED. IF DAMAGED, ALL EDGES
OF THE CLEANOUT PLATES SHOULD BE
SEALED WITH BOILER PUTTY WHEN
REINSTALLED UNTIL INSULATION CAN BE
REPLACED.
Using a flashlight, examine all flue passageways. If
passageways are free of soot and obstruction, it is
not necessary to remove the rear cleanout panels.
If the flues need cleaning or are obstructed, call a
qualified service agency.
Figure 11: Inspection of Boiler Flueways
