Barnstead FB1310M Operation And Repair Manual And Parts List - page 20

20

M

AINTENANCE AND

S

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.

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.