44
Maintenance and Servicing
Warning
Refer servicing to qualified personnel.
Warning
Replace fuses with same type and
rating.
Warning
This product contains refractory
ceramic, refractory ceramic fiber or
fiberglass insulation, which can pro-
duce respirable dust or fibers during
disassembly. Dust or fibers can cause
irritation and can aggravate preexisting
respiratory diseases. Refractory
ceramic and refractory ceramic fibers
(after reaching 1000°C) contain crys-
talline silica, which can cause lung
damage (silicosis). The International
Agency for Research on Cancer
(IARC) has classified refractory ceram-
ic fiber and fiberglass as possibly
carcinogenic (Group 2B), and crys-
talline silica as carcinogenic to
humans (Group 1).
Warning
To avoid electrical shock, this furnace
must always be disconnected from the
power supply prior to maintenance
and service.
Perform only maintenance described
in this manual. Contact an authorized
dealer or our factory for parts and as-
sistance.
Warning
Please note the following WARNINGS:
This warning is presented for compliance with California
Proposition 65 and other regulatory agencies and only
applies to the insulation in this product. This product
contains refractory ceramic, refractory ceramic fiber or
fiberglass insulation, which can produce respirable dust or
fibers during disassembly. Dust or fibers can cause
irritation and can aggravate preexisting respiratory
diseases. Refractory ceramic and refractory ceramic
fibers (after reaching 1000°C) contain crystalline silica,
which can cause lung damage (silicosis). The Internation-
al Agency for Research on Cancer (IARC) has classified
refractory ceramic fiber and fiberglass as possibly
carcinogenic (Group 2B), and crystalline silica as
carcinogenic to humans (Group 1).
The insulating materials can be located in the door, the
hearth collar, in the chamber of the product or under the
hot plate top. Tests performed by the manufacturer
indicate that there is no risk of exposure to dust or
respirable fibers resulting from operation of this product
under normal conditions. However, there may be a risk of
exposure to respirable dust or fibers when repairing or
maintaining the insulating materials, or when otherwise
disturbing them in a manner which causes release of dust
or fibers. By using proper handling procedures and
protective equipment you can work safely with these
insulating materials and minimize any exposure. Refer to
the appropriate Material Safety Data Sheets (MSDS) for
information regarding proper handling and recommended
protective equipment. For additional MSDS copies, or
additional information concerning the handling of refracto-
ry ceramic products, please contact the Customer Service
Department at Barnstead International at 1-800-553-0039.
To Replace a Heating Element
a.
Disconnect furnace from power supply.
b.
Remove the back terminal cover of the furnace
(Note placement and connections of wires).
c.
Loosen the screws and nuts on the terminals of
