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9.13 The Heaters
The autoclave contains internal submerged heaters, mounted at the
bottom back side of the jacket (see drawing below). Model 2540 has
three (3) 1000W / 208V heaters. Model 3870 has six (6) 1000W / 208V
heaters.
To replace heaters proceed as follows:
Caution!
Before starting, disconnect the instrument from the power source
and ensure that there is no pressure in the autoclave’s chamber
and jacket.
1. Remove the rear cover plate by unscrewing the screws.
2. Discharge any steam pressure and drain the water from the jacket
by gradually opening the drain valve (at the back of the unit). Wait
until all the water has drained from the jacket. (see sec 9.17)
3. Disconnect the electrical leads for each heater from the heater
terminal block.
4. Remove the heater by unscrewing and pulling it out from the jacket
bushing.
5. Replace the heater with the new one, use Teflon on the thread to
seal it. Tighten the heater to prevent leaking.
6. Connect the wires of the new heater to the terminal block.
7 Close the drain valve.
8. Connect the autoclave to the power source.
9. Turn the main switch to ON and check that the steam generator
heats up correctly. Check also for any leaking by the heaters
10. Replace the rear panel
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