7
The insulation material of this kiln shows a significant shrinkage after
several firings. It is recommended to tighten the kiln shell with a
screwdriver or a spanner from time to time (see picture).
Repairs
CAUTION:
Repairs
shall
only
be
performed
by
authorized
specialists
(electrician/electrical engineer)!
1) Checking the heating elements
(kiln temperature must be below 50°C)
-
Start cold kiln with 100% power (see instructions for controller).
-
Power off after 20 seconds.
-
Unplug the kiln from the power source.
-
Open the kiln and test the temperature of each element by touching it with a moist
sponge.
-
Cold heating elements are defective and must be replaced.
2) Replacing heating elements
-
Remove the screws on the control box cover on the kiln.
-
Loosen the connecting screws at the ends of the heating element with two 8 mm
spanners and remove them.
-
Cut off the looped ends of the heating element.
-
Remove the element pins from the grooves in the kiln chamber.
-
Remove the defective element carefully from the groove and pull out the ends towards
the kiln chamber.
-
Clean the grooves carefully (use a vacuum cleaner).
-
Insert the new element into the grooves and push the ends outward through the bore
hole into the control box of the kiln.
-
Shorten the ends of the element to the appropriate length, bend them into a loop and
connect them with the set screws to the electrical supply.
-
The screws must be tightened firmly in order to get maximal contact pressure and low
transfer resistance.
-
Remount cover.
ATTENTION: Evaporating oil can cause unpleasant odors during the first firing with the new
heating elements.
