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Door springs
tension check
This procedure is meant to verify that the springs are properly adjusted, to ensure
a correct closing of the furnace.
1. Unplug instrument and let the furnace cool down completely.
2. Closing test:
Furnace
cleanliness
1. To run this inspection, instrument must be turned OFF, unplugged and furnace
1.4
Using an appropriate tool, verify that all wire terminals of ceramic
connectors are well tightened, both on the element side and the wire
side. Do not over-torque the screws. Simply verify that they are not
loosened.
2.1
With the power off, the door should remain closed.
2.2
Manually open the door by 25 mm [1 inch].
2.3
Let the door close under its own weight.
2.4
If the door does not close, or if it falls down too abruptly, please proceed
topage81,Spring position adjustment, to adjust the springs.
2.5
The spring adjustment is correct when the door closes by itself, slowly
but without hesitation.
IMPORTANT: Always disconnect the instrument from the power outlet when
working with panels removed. 240 Volts inside! Risk of electrocution!
at room temperature.
1.1
Unplug K2 (240 volts – risk of death by electrocution).
1.2
Remove the safety shield by pulling the far ends of its levers apart. That
will free the levers from the white PTFE pivot points.
1.3
Remove the furnace door (please refer to page 81, Furnace door
removal for details).
1.4
Visually inspect the door and furnace insulation. Verify that no parts are
menacing to fall or are presenting severe cracks that could impair
functionality.
1.5
All parts that are found faulty should be ordered and replaced as fast as
possible.
1.6
Using dust mask, gloves and vacuum cleaner, remove all dust from
furnace and door. Pay attention to do not touch the material with the
tube, the material is very brittle.
1.7
Re-install door. While fastening its lever arms, hold the door firmly
against the furnace to prevent any movement, and possible future door
closing issues.
57
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