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1500°C Tube Furnace
Heating Element Replacement
WARNING : Disconnect furnace from main power before attempting any
maintenance to furnace or its controls.
The STF55433 heating elements must be matched in Amps values. Perform a continuity
check on the elements to determine which element is bad. Mark the other elements with
their Amp value they can be used again if matched with elements with the
CAUTION : When installing new elements, always replace all elements so the Amps
value match. Refer to the Heater manual included with the furnace for additional
installation and handling instructions.
To install the heating elements, complete the following steps (refer to Figure 10"Heating
Element Replacement" ):
1. Disconnect the main power.
CAUTION : This product contains ceramic fiber or other refractory which can result
in the following:
May be irritating to skin, eyes and respiratory tract.
May be harmful if inhaled.
May contain or form Cristobalite (crystalline silica) with use at high temperature
(above 871°C) which can causes severe respiratory disease.
Possible cancer hazard bases on test with laboratory animals. Animal studies to
date are inconclusive. No human exposure studies with this product have been
reported.
2. Remove the furnace front and back panels.
3. Use the extension tool to remove the C clamps, and remove the element straps.
4. Carefully remove each heating element. Save any old elements that are still
operational for later use.
5. Carefully unwrap one of the new heating elements.
6. Hold the element with two hands and gently insert the element into the terminal hole.
7. Slide the element into the terminal hole and through the furnace.
CAUTION : Wear gloves and a face mask when handling the ceramic wool.
8. Pack ceramic wool around the heating element between the furnace and the
element. Make sure that the ceramic wool fills all spaces so that no heat is lost
during operation.
NOTE The ceramic wool should only extend 0.5 to one inch inside the terminal hole.
Maintenance & Cleaning |
Chapter 10
Amp Value.
305435H03 | 10-83
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