Tuttnauer 2301006, Operation & Maintenance Manual

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Page 7 of 117 pages
Vacuum to gasket valve (53) ; connects the gasket groove to the ejector. While the
door is moving during the opening or closing - the valve is open and vacuum is
produced to pull the gasket inside the groove, ensuring the smooth sliding of the
door. When the door is open, this valve is operated but vacuum is not produced.
The commands of the two valves are achieved by means of two solenoid valves.
The two valves work in opposition, at any moment when one of them is open the
other is closed, as described above.
Solenoid - Operated Valves
Besides the pilot solenoid valves which control the air - operated valves, the
following solenoid valves have direct action as described below:
Close door valve(39); is a solenoid valve which transmits compressed air to the
door cylinders for closing the door.
Open door valve(38); is a solenoid valve which transmits compressed air to the
door cylinders for opening the door.
Air supply valve (31); is a solenoid valve which transmits compressed air to the
manifold branch solenoid battery for the command of pneumatic valves.
It ensures that the valves control and doors driving are active, only if the electrical
power supply is present.
Note: The valves numbers are in accordance with the valve numbering list
and piping diagram at the end of the manual.