Using a stiff brush, for example, a toothbrush,
remove any build up of grease, wax, dust, and
dirt. Also remove a similar build up within the
blower housing itself.
Clean the ventline elbow next to the unit, first
by removing the elbow and then cleaning with
warm soap water or a stiff brush.
The interior of the housing should be cleaned
every 90 days of bits and pieces of paper which
fall to the exterior of the incinerator chamber. To
do this, remove the four screws holding the top
and bowl, then lifting the top section out of the
way, thereby exposing the interior of the
housing. Remove the paper pieces.
Before replacing any part or making any continuity
measurements, voltage must be removed from the unit.
Remove top and bowl section.
For electrical parts inspection, remove the cover from
the control box. All electrical parts are accessible.
Inspect for loose wiring or wiring harness holding the
Disconnect the terminals of the heater leads by first
removing the hex locknuts. Carefully remove the
asbestos sealing rope about the heater cold ends
coming through the wall of the incinerator chamber as
this packing rope will be reused. Remove the 1/4 inch
bolts holding the heater brackets in place so that the
brackets and heater are now free to be removed through
the front of the incinerator chamber. Install the new
heater in exact reverse order.
CAUTION: When replacing the hex locknuts on the
heater terminals, use two end wrenches, one for the
locknut and one for the terminal stud coming from
the heater. Be sure that the locknut is tight
against the terminal without twisting the heater stud
and breaking the seal of the heater.
Good practice is to replace the control thermostat
(L-290) along with a new heater in order to insure proper
Both control thermostat (L-290) and blower thermostat
(F-140) are located in the lower portion of the incinerator
chamber to the rear of the ashpan. Both are replaced
from the back by removing two screws. Replacement
thermostats are furnished with the necessary wiring and
terminals. When replacing thermostats make certain to
use the same number of gaskets under the mounting
The catalyst inspection port, located at the upper rear
portion of the incinerator chamber, is closed by means of
an asbestos rope. To inspect the level of catalyst,
remove the rope. If the level of the catalyst is quite low,
say 1 inch or more below the level of the top of the port,
fill the port with replacement catalyst, working it to the
left and right beyond the extremes of the port by means
of a screwdriver to insure that all parts of the catalyst
container are full of the catalyst. Use sufficient catalyst
to fill all parts as well as the port itself to within about 1/4
of an inch of the top of the port. Then replace the
asbestos rope, packing it securely in place.