Repairing Firebricks; Replacing A Thermocouple; Replacing Heating Elements - OTC 5281 Manuel De L'utilisateur

Maintenance

Repairing Firebricks

The firebricks around the inside of the unit
insulate the firing chamber and support the
heating elements.
Hairline cracks in the firebrick are normal. The
cracks function as expansion joints, expanding
and contracting as the unit cools and heats.
However, holes in the firebrick may be patched
with repair cement to prevent them from
becoming larger. Use a commercially available
ceramic cement or a stiff putty made of high-fire
wash and water.
CAUTION: Do not touch the heating
elements during this procedure. A damaged
element could break or burn out the next
time it is heated.
1. Carefully vacuum the interior of the unit to
remove any soot or ash.
2. Undercut the edges of the area to be filled.
3. Tamp the cement or putty into place.
4. After the spot has dried thoroughly, use 250
grit sandpaper to smooth the cement until it
is level with the surface.
5. Vacuum the interior of the unit to remove any
cement or putty dust.

Replacing a Thermocouple

A thermocouple sensor may deteriorate
over time, resulting in inconsistent heating
temperatures. Contact the DPF Technical
Support Line at 800-822-5561 if it becomes
necessary to replace a thermocouple sensor.
Replacing a Heating Element
New heating elements look like a tightly wound
spring. Used heating elements are dull, dark,
brittle, and may break if they are bent when
they are cold.
Over time heating elements gradually draw less
power and should be replaced. Contact the
DPF Technical Support Line at 800-822-5561
for assistance.
12
WARNING: To prevent personal injury,
•
Repair all chips and cracks around the
chamber door and the door sealing area
to reduce the risk of burns and, in extreme
cases, fire.
•
Do not use the unit if the thermocouple
is damaged. A working thermocouple is
required to regulate the temperature inside
the chamber.
If you need assistance,
call the
DPF Technical Support Line
800-822-5561