Barnstead FB1300 Operation And Repair Manual And Parts List page 18

Note
The hearth plate contains no
heating coil, and may be saved
for re-installation if it is in good
condition. The hearth plate is
replaceable independent of the
heating element.
6. Remove the back insulation block by
opening the door and gently pushing it
out. Support this insulation block while
removing it, as it is quite soft and easily
crumbled at the edges.
7. Remove bottom cover to obtain access
to terminals.
These steps will expose the heating element
leads and insulating bushings in the bottom
plate of the furnace.
8. Cut the element leads between the ele-
ment and the terminal block. (There are
two leads.) The element and hearth
plate unit may now be removed by
pushing it straight back out of the fur-
nace. Use care not to damage the
chamber insulation when removing the
hearth plate and element as it can be
reused if it has not been contaminated.
9. Remove the old element lead wire and
power wires from the terminal block,
and save the glass sleeving for re-
installation on the new element leads.
Sleeving must be replaced if cracked or
brittle!
10. New elements are shipped flat to pro-
tect them from damage in shipment,
and to save space in storage. They
must be formed before installation.
11. Place the element on a flat surface with
the smooth (exposed element) side up.
Place a board or other straight edge
along one row of notches.
12. Gently bend the element along the
straight edge. The refractory cement
will break along the row of notches.
M S
AINTENANCE AND ERVICING
17