THERMOLYNE FC2020P, Руководство по эксплуатации

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12
MAINTENANCE AND SERVICING
WARNING
THIS FURNACE CONTAINS REFRACTORY CERAMIC INSULATION WHICH CAN PRODUCE RESPIRABLE
FIBERS AND DUST WHEN HANDLED. THESE FIBERS CAN CAUSE IRRITATION AND CAN AGGRAVATE PRE-
EXISTING RESPIRATORY DISEASE. THE INTERNATIONAL AGENCY FOR RESEARCH ON CANCER (IARC)
HAS CLASSIFIED REFRACTORY CERAMIC FIBER AS POSSIBLY CARCINOGENIC.
AFTER SERVICE REFRACTORY CERAMIC FIBER DUSTS MAY CONTAIN CRYSTALLINE SILICA, WHICH MAY
CAUSE LUNG DAMAGE (SILICOSIS) AND WHICH HAS BEEN CLASSIFIED BY IARC AS A PROBABLE
CARCINOGEN.
The refractory ceramic materials are located in the door, the hearth collar bricks, and in the chamber of the furnace.
Tests performed by the manufacturer indicate that there is no significant risk of exposure to dust or respirable
refractory ceramic fiber resulting from operation of the equipment under normal conditions. However, there may
be a risk of exposure to respirable refractory ceramic dust or fiber when repairing or maintaining the insulating
materials, or when otherwise disturbing the materials in a manner which causes release of dust or fibers therefrom.
Through the use of proper handling procedures you can work safely with these insulating materials and minimize
any exposure. Accordingly, before you repair or replace any insulating materials, or perform any other servicing on
this product which could disturb or cause exposure to dust from insulating materials, you should consult the
appropriate Material Safety Data Sheets (MSDS’s) for such products with respect to proper handling and
appropriate protective equipment. For additional MSDS’s, or additional information concerning the handling of
refractory ceramic products, please contact the Customer Service Department of Barnstead/Thermolyne
Corporation.
WARNING
REFER SERVICING TO QUALIFIED PERSONNEL.
WARNING
TO AVOID ELECTRICAL SHOCK, THIS FURNACE MUST ALWAYS BE DISCONNECTED FROM THE POWER
SUPPLY PRIOR TO MAINTENANCE AND SERVICING.
NOTE: Perform only maintenance described in this manual. Contact an authorized dealer or our factory
for parts and assistance.
6-1. To Replace a Heating Element:
(SEE Figure 2 for location of components mentioned below.)
a. Disconnect furnace from power supply.
b. Remove the back terminal cover of the furnace (4 screws). (Note placement and connection of
wires.)
c. Loosen the nuts on the terminals of the element to be replaced.
d. Straighten the leads of the old element.
e. Open the door and pull the defective element out. (It may be easiest to turn the furnace so that
the element to be removed is on top.)
f. Slide the new element into place, threading the leads through the insulating porcelain bushing in
the back of the furnace.