43
Fig. 58
Clean Heat Exchangers
Clean
Corners
Front View
Inside of Firebox
9.4 Gaskets
Fig. 59
Rope
Gasket
Rope
Gasket
Furnace Door
Chimney Transition
Cover
Inspect the rope gasket on the furnace door and on the
chimney transition cover at the back of the furnace. A
uniform indentation in the rope indicates the rope gasket
is sealing properly. If it is not sealing properly, or if the
rope gasket is damaged, replace the rope gasket.
Using Fig. 60 as a reference, inspect the hopper lid
gasket and replace if necessary.
NOTE: Replacement gaskets for the furnace
door, chimney transition cover and hopper are
available from authorized Central Boiler dealers.
Fig. 60
Hopper
Gasket
9.5 Heat Exchangers and Chimney
Transition
The heat exchangers should be cleaned every time ash
is removed, or if air flow through the heat exchangers
becomes restricted (see Fig. 61).
To inspect the heat exchangers, remove the chimney
transition cover on the back of the furnace and open
the firebox door. It will probably be necessary to kneel
down at the back of the furnace to look through each
heat exchanger passageway. The heat exchangers
taper up from the back of the furnace to the front. Pay
particular attention to the top of each passageway as
this is where ash tends to accumulate. The top of each
heat exchanger passageway is where most air flow and
heat transfer occur, so it is especially important to keep
the top free of any buildup.
Fig. 61
Incorrect
Inadequate Flow
(Cleaning Needed)
Correct
Proper Flow
Remove deposits by scraping with the cleaning rod
provided with your outdoor furnace. Use the cleaning
rod from both the front and the back of the furnace,
working from top to bottom of each passageway in the
heat exchanger.
Fig. 62
Clean heat exchangers from the front
AND the back using the cleaning rod.
Section 9 - Routine Maintenance
