Carbolite HTF 18 - Manual (Page 12)

MF47-3.05 12
good contact is essential; poor contact can lead to sparking and destruction of the top of the
element.
Ensure that the elements are correctly placed: the thin part of the element, and the tapered section,
should ideally be entirely within the heating chamber; the element should not touch the bottom of
the chamber.
Important -There should be a minimum clearance of 10mm below the bottom of the element, and
a minimum clearance of 15mm from the sides of the chamber. The elements should be parallel
with the sidewalls.
Replacements:
Read the section above on initial installation.
Remove the aluminium braids and clips using the clip tool provided with the furnace. Lift out the
old elements and the insulation blocks: handle the insulation pieces with care as they are fragile.
Carefully loosed and remove the clamps.
Prepare and install the new elements as explained above.
Heat up the furnace to a moderate temperature and ensure that the furnace is controlling properly,
in case the previous element failure resulted from a fault in the control system.
After installing new elements run the furnace at 1500°C for an hour. This creates a protective glaze
on the element surface.
Element Fitting Layout Use of Clip Tool
The tool comprises two levers
Rotate Clamp into the
best position for
screwdriver access