Barnstead FB1310M Operation And Repair Manual And Parts List page 20

M S
AINTENANCE AND ERVICING
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.
20
6. Remove the back insulation block by open-
ing 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 element
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 furnace. 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 contaminat-
ed.
9. Remove the old element lead wire and
power wires from the terminal block, and
save the sleeving for re-installation on the
new element leads. Sleeving must be
replaced if cracked or brittle!
10. New elements are shipped flat to protect
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
rough 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.