Barnstead F62730, Operation Manual

Page: 41 / 80

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.