Skutt GlassMaster Kiln - Manual (Page 36)

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The GP706 is equipped with a analog pyrometer and infinite switch to control and monitor the temperature
of the kiln. Since there is no automatic shut-off system it is extremely important to monitor the kiln while it is firing.
The firing rate will be controlled by how much you turn up or turn down the switch. In order to hold at a specific
temperature it may be necessary to allow the kiln to reach the temperature and then adjust the switch slightly down
until the kiln “balances” at the desired temperature. It is a good idea to keep a log of what switch settings produce
holds at certain temperatures.
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Ensure that the kiln’s power switch is in the OFF position. Plug the kilns power cord into the 120 volt
receptacle you plan to use. Ensure that the kiln’s lid is closed, and turn the kiln switch to HIGH. The pilot light on
the control box should illuminate. Leave the switch in the HIGH position for about 5 minutes then turn the switch
to OFF. Unplug the kiln, open the lid and lock it in place with the lid brace. Very carefully check for signs of heat
from the heating element in the kiln lid. DO NOT TOUCH THE HEATING ELEMENT AS IT WILL BE VERY HOT. If
the heating element is warm, the kiln is ready for it’s first firing. If the kiln fails to heat or your circuit breaker trips,
it will be necessary to call your distributor or electrician for advice. Skutt’s customer service may be called if a
distributor or electrician is unavailable.
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It is advisable to perform the first firing with the kiln empty. This firing will ensure that the heating element
is properly oxidized (broken in). Install the kilns ceramic peep plug if you wish. Turn the kiln’s switch to the #4
position and leave there for 30 minutes. This will allow the kiln to begin heating slowly. After 30 minutes, turn the
kiln switch to HIGH and let the kiln fire until 1650 F degrees is attained. Then shut the kiln off and allow to cool
normally.
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The power control switch of your kiln is similar to the switches found on most ranges. The higher the switch
setting, the hotter the kiln will get. On LOW setting, power is supplied to the kiln about 20% of the time. On
setting #4 the power is on about 50%, setting #6 about 80% and on HIGH 100%. Some experimentation will be
necessary to determine what settings are best for your application.
This particular type of switch is called an “infinite” switch. It is (infinitely) adjustable between LOW and HIGH
settings. On settings other than HIGH, the kiln’s pilot light will cycle on and off as the infinite switch cycles on and
off.
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Always close the lid of your kiln gently. Since the heating elements are in the kiln lid, any sudden jar, such
as the lid slamming shut, can dislodge the heating elements or the pins that hold the elements in place. If the lid is
slammed forcefully enough, the brick in the kiln lid may fracture and break loose. This type of damage is generally
not covered by your kiln’s warranty.
After each firing, the lid and heating elements should be inspected. Any pins holding the heating elements in
place that appear to be coming loose should gently be pushed back into place.
GP706
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