Tuttnauer 2301006, Руководство по эксплуатации и техническому обслуживанию

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Page 5 of 117 pages
2. FUNCTIONAL DESCRIPTION
2.1 The Steam to Steam Generator
The steam for the sterilization process is supplied from the building main steam
supply to a built in steam to steam generator, which produces clean steam and is
directly connected to the autoclave chamber.
Water to the steam generator is supplied by a single-phase pump, from a water
reservoir, which is connected to a source of distilled or mineral free water.
A water level control system, consisting of two electrodes mounted on top of the
boiler and connected to the electronic control board maintains through the pump
and a solenoid valve, a constant water level and ensures a safe operation of the
steam to steam generator.
A pressure switch connected through the electronic board regulates the output
steam pressure. A safety relief valve blows off at a pressure of 40 psi, to prevent
build-up of overpressure in case of control failure.
Only mineral - free water or distilled water will be used for operation of the
generator. See also par. 2.5 ‘Water Quality’.
2.2 Water Pump for the Steam Generator
The suction of the pump is connected to the water reservoir filled with mineral-free
water and mounted on the side of the autoclave. The mineral water is heated to
80
º
C and maintained at this temperature so that the steam obtained from this
water has a low content of non-condensable gases. A PT100 temperature sensor
controls the water temperature.
A float valve keeps a constant level of water and prevents an overflow of water out
of the reservoir.
A lower float switch stops the operation of pump and heaters, when the water level
drops below this switch.
The Vacuum Breaker
When the generator cools down, it generates vacuum inside.
The vacuum breaker breaks it so that the generator won’t draw water from the
mineral free water reservoir.