Barnstead F62730 Operation Manual - page 41

41

g.

Loosen top adjustment bracket and remove de-

fective muffle.

h.

Insert new muffle with vent hole facing the top of

unit.

i.

Readjust top bracket to fit snugly up against

muffle.  Make sure muffle is laying flush against

front case section.

j.

Reinstall metal retaining band and tighten until

muffle seats firmly into case section.

k.

Reconnect element lead wires.

On the 120V or 100V muffle there are three element

lead wires.  Connect the front and the back element lead

wires to the mechanical relay. Connect the middle ele-

ment lead wire to the solid state relay.

On the 230V and 240V muffles there are two element

lead wires.  Connect the front element lead wire to the

mechanical relay. Connect the back element lead wire to

the solid state relay.

l.

Reinstall the thermocouple and the retaining 

clip.

m.

Reinstall the cover section.

n.

Set the furnace upright and test the operation of

the furnace.

M

AINTENANCE AND

S

ERVICING

Note

Make sure the black insulation sleev-

ing covers the exposed portion of the

element lead wires.

Note

Make sure the exposed section of the

T/C lead wires are not contacting each

other.