Laars MASCOT LX, Service Manual

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Mascot LX Service Manual
4. To reach the burner and combustion chamber, start
by removing the blower as described in Section B11.
5. Remove the burner gasket.
6. With the blower removed, the small panel on the top
of the unit will allow access to the end of the burner.
See Fig. C4-2. Lift the burner up and away from the
combustion chamber.
7. Check the burner and clean it if necessary. Blow
compressed air from the outside of the burner into
the center. Wipe the inside of the burner clean with
glass cleaner.
A dirty burner may be an indication of improper com-
bustion or dirty combustion air. Determine the cause
and correct it.
8. Clean the inside of the heat exchanger by brushing
away light accumulations of soot and debris. Use a
power drill and a brush with soft bristles.
Do not use a metal brush – this could damage the
surfaces of the heat exchanger tubes or the refractory
material.
Be careful not to damage the white refractory material at
the top and bottom of the heat exchanger.
9. Once the tubes have been brushed clean, rinse
the tubes and combustion chamber. In the gar-
den sprayer, make a mixture of water with a small
amount of white vinegar. Use the sprayer to flush all
of the debris out of the bottom of the flue collector.
The debris will flow into the longer hose you in -
stalled on the condensate trap, and into the separate
container. (Do not flush the debris into the normal
condensate drain line.)
Failure to rinse the debris from the heat exchanger and
temporary drain line may lead to a clogged conden-
sate line, trap, or neutralizer. If a condensate pump is
included in the system, this may be damaged by the
debris, and this could cause property damage.
10. After cleaning, replace the parts on the unit in the
reverse order of the instructions listed above. Be
careful to replace the burner gasket. Do not re-use
the burner gasket if it is damaged.
When replacing the burner, be sure the flange is
aligned with the mating surface. Both parts are
keyed so they will fit correctly.
11. Remove the temporary hose connected to the con-
densate trap, and re-connect the condensate drain
line.
C4
cont.
Cleaning the Burner and Combustion Chamber (continued)