13
Maintenance and Servicing
To Replace a Heating Element
52
Large Tabletop Muffle
Thermo Scientific
To Replace a Heating Element
Refer servicing to qualified personnel.
Replace fuses with same type and rating.
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 International 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).
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 assistance.
1. Disconnect furnace from power supply.
2. Remove the back terminal cover of the furnace (Note placement and connections of wires).
3. Loosen the screws and nuts on the terminals of the element to be replaced.
4. Open the door and pull the defective element out.
5. Slide the new element into place, threading the leads through the insulating porcelain bushing on
the back of the furnace.
6. Cut off any excess lead wire. Be careful not to nick element lead wires. Reinstall terminal
connections and tighten screws and nuts securely.
7. Replace the back terminal cover.
8. Reconnect furnace to power supply.
9. Test operation of furnace.
To Replace a Platinel II Thermocouple
1. Disconnect furnace from power supply.
2. Remove the back terminal cover of the furnace. (Note placement and connection of T/C lead
wires).
3. Remove the screws on the thermocouple terminals and pull the thermocouple straight out.
Summary of Contents for F30400
Page 6: ...Contents 4 Large Tabletop Muffle Thermo Scientific...
Page 10: ...1 Safety Information Warning 8 Large Tabletop Muffle Thermo Scientific...
Page 14: ...2 Introduction Principles of Operation 12 Large Tabletop Muffle Thermo Scientific...
Page 18: ...4 Unpacking 16 Large Tabletop Muffle Thermo Scientific...
Page 28: ...7 Single Setpoint Models w OTP Tuning 26 Large Tabletop Muffle Thermo Scientific...
Page 50: ...11 Furnace Loading 48 Large Tabletop Muffle Thermo Scientific...
Page 62: ...15 Replacement Parts List 60 Large Tabletop Muffle Thermo Scientific...
Page 64: ...16 Ordering Procedures 62 Large Tabletop Muffle Thermo Scientific...