Tuttnauer 1730 M, Technician Manual

Page: 22 / 51

20
6.11 Unclogging the multi-Purpose Valve or Chamber
VERY IMPORTANT!
When sterilizing cotton wool or pads, it is essential to wrap them in
paper or cotton bags in order to prevent the multi-purpose valve and
the autoclave openings from becoming clogged with remnants of the
material.
1. Pour distilled water into the chamber, according to quantities
mentioned in the table below:
1730 2340/2540 3140 3850 3870
10-12
oz
300-350
ml
12-15
oz
350-450
ml
14-16
oz
420-480
ml
20-23
oz
600-690
ml
24-27
oz
720-810
ml.
2. Close the door.
3. Turn the multi-purpose valve to STE. position.
4. Turn the timer knob to 20 min.
5. Turn the thermostat (B10) knob to either 250
°
F or 274
°
F
°
(121
°
C
to 134
°
C).
6. Turn the main switch to START position.
7. After the timer has reached “0” turn the multi-purpose valve
(clockwise) to the FILL position.
In most cases, the pressure pushes the obstructing substance out,
and the steam exhausts into the water reservoir.
8. When the pressure gauge reaches 0, turn the multi-purpose valve
to the OFF position, and the main switch to STOP.
9. Open the door.
10. Replace the water in the water reservoir.
The autoclave is ready for the next cycle.
11. If this procedure does not clear up the clogging, replace the multi-
purpose valve.
6.12 Pressure Door Lock System
This safety device prevents the door from opening when the chamber is
pressurized.
The system is based on the built up pressure in the chamber that pushes
the Silicon-rubber bellows and the pin into the grove of the tightening
bolt. This prevents the operator from opening the door. When the steam
is released, this bellow returns to its original position, drawing the pin
with it thus releasing the tightening bolt.
Should there be no pressure in the chamber, and the door cannot be
opened, the following procedure should be observed.
1. Turn the handle of the multi-purpose valve to EXH. & DRY.
2. The steam exhaust valve pipe is open and air inserts the chamber.
In this stage the door can be opened.