Before leaving the factory, every Kiln Sitter® is adjusted and its operation carefully checked.
However, it is possible that the adjustments have changed in shipment or uncrating. Therefore,
the following adjustments must be checked and readjusted if necessary before each firing.
WARNING
You are responsible for the adjustment and maintenance of the Kiln Sitter
®. The warranty
does not cover overfiring regardless of cause. The kiln will not overfire if witness cones are
watched and the kiln shut off manually. Because the FIREMATE
® kiln is very repeatable
as compared to a manually operated kiln or most other automatic kilns, the timer should be
used. The FIREMATE
® kiln helps compensate for voltage fluctuations and room
temperature changes, but cannot correct for load variations. Heavy loads will take longer
than very light loads.
Adjustments
The firing gauge is used for adjustments only, and must never be left in place on the refractory
tube during firing. Remove the rubber band to release the firing gauge. Store the firing gauge for
future use after you complete the Kiln Sitter
® Adjustments.
Check the centering of the actuating rod with the firing gauge in place.
The actuating rod must travel freely in the center of the oblong slot without touching the sides at
any point, or the rod will stick and the Kiln Sitter
® will fail to operate. If additional adjustment is
needed, loosen two screws that hold the guide plate and move the plate to the right or left as
required. Re-tighten screws and recheck its position until the actuating rod is centered. Press
down on the release claw and check full travel of the actuating rod. See that it does not touch the
sides of the refractory tube.
Lift the Kiln Sitter
® weight to its vertical position. The release claw should just barely clear the
trigger. If not, loosen the set screw in the center of the weight and slide the trigger up or down
and retighten the set screw securely so that it does.
Make sure all switched are off, including the timer, Kiln Sitter
®, and thumbwheel switch.
Remove the firing gauge and store in a safe place for future adjustment checks. Raise the weight
to its vertical position with one hand, with your other hand raise the actuating rod on the inside of
the kiln until the claw engages the trigger. Let go of the weight and push the plunger all the way
in until it locks. (limit timers must be set above the off position for this test) Slowly let the
actuating rod down until the weight is released. The weight should not stick in the vertical
position. It should fall freely and cause the plunger (button) to pop out into its original “off”
position. Repeat several times to make sure all moving parts are free and functioning properly.
Now raise the weight only ½ of the way up. Push in plunger and allow weight to drop. Plunger
should pop out to its original position. This checks that the weight’s pivot is not too tight.
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