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The spiral chamber is basically self-cleaning. However,
if there is a draft problem and you have been burning
wood for a long time with little heat demand, the spiral
chamber may need cleaning. Soft coal will also require
more frequent cleaning. To clean, remove stovepipe and
scrape the creosote from the front and top of the chamber
and remove. The rear of the chamber will not accumu late
creosote.
1/8” to 1/4” of creosote in the spiral chamber is
normal. Creosote can be burned off by burning coal for
a few days.
Firebricks may become cracked during the course of
normal operation. A cracked brick that is still in place is
still doing its job and need not be re placed immediately. If
a brick is broken and has fallen out of place, it should be
replaced immediately. The rebrick used in the Harman
furnaces are inexpensive and easy to replace.
The blower manufacturer recom mends the blower motor
to be oiled once a year with 10 to 20 drops of light weight
oil [check instructions packed in blower box).
Remove oil burner by removing four mounting bolts,
Burner can be tied up to ceiling to avoid having to remove
the wiring. Next, remove the collar from the front cover
and remove front cover by tilting out from top rst. Now
the heat exchanger will be exposed. Next, remove the
four nuts that hold on the cover, then remove the cover.
This will ex pose the inside of the heat exchanger. Remove
spirals by simply pulling them out and clean the tubes with
a brush. Reinstall spirals so they are ush with the end of
the tube and reassemble unit in reverse of disassembly.