AWH Tanko RT, Operating & Installation Instructions Manual, Page: 94 / 132

ATEX Retractor System TANKO-RT/-RTS
84/121 Translation - Operating/installation instructions 2020/01 7 Maintenance
7.3 Switch-Off Procedure
In accordance with the type of device activation and how it is integrated (e.g. manual or automatic) on
the cleaning plant, the switch-off procedure has to be integrated and the following instructions have to
be observed when switching off.
WARNING
Risk from sudden, unforeseeable or unauthorized reactivation of the device
(e.g. triggering of a start command as a result of incorrect operation of a start-up control
device)!
There is a risk of death or severe physical injury.
Before performing any disassembly, maintenance, repair or cleaning work on the device,
it is essential to carry out the following work steps in the specified order:
Switch-off procedure
1.
Interrupt the supply of cleaning medium (e.g. slowly close the shut-off valve or
ball cock).
 Check that the supply of cleaning medium is stopped and there is no media
pressure at the device.
2. Safeguard the supply of cleaning medium to prevent sudden, unforeseeable or
unauthorized reactivation (e.g. lockable switch/shut-off elements).
 Check that any supply of media is reliably prevented and insert dummy disks if
necessary.
Comply with a cooling phase for media temperatures above 80 °C.
 Make sure that the cleaning device and supply line for the cleaning medium have
been completely drained (waiting time see
Section 3.2.2 Functional Flow Chart ).
3. Retract the cleaning head and secure the device with locking cylinder.
4. Stop the supply of compressed air (e.g. slowly close the shut-off valve or ball cock).
 Check that the compressed air supply is interrupted and that there is no air
pressure on the device.
 Safeguard the compressed air supply to prevent sudden, unforeseeable or
unauthorized reactivation (e.g. lockable switch/shut-off elements).
5. Disconnect the power supply to the higher-level plant/the device.
 Check to make sure that the power supply is interrupted and that there is no
voltage at the sensors.
 Safeguard the power supply to prevent sudden, unforeseeable or unauthorized
reactivation (e.g. lockable switches)
6. Depressurize the container against the ambient pressure.
 Safeguard the supply of steam or other media that affect the pressure to prevent
sudden, unforeseen or unauthorized reactivation (e.g. lockable switches/shut-off
elements).
 Make sure that the pressure inside the container matches the ambient pressure.