11
Decommissioning
11.1
Safety information for decommissioning
WARNING
Risk of explosion
Some of the work described in this Chapter assumes an Ex free zone.
b
Wait 20 minutes after switching off the main power supply before opening the
enclosure.
Technical knowledge needed / requirements for decommissioning
NOTICE
•
You are basically familiar with the GM700.
•
You are well versed in the ATEX Directives.
•
You are familiar with conditions at the installation location, especially possible haz‐
ards through the gases in the gas duct (hot/dangerous to health). You are capable
of recognizing and preventing danger by possibly escaping gases.
If one of these requirements is not met:
b
Contact SICK Customer Service or your local SICK representative.
Risk of explosion
DANGER
Risk of explosion through residual voltages and hot surfaces in the device
When the device is switched off, residual voltages and hot surfaces represent an
increased risk of explosion when the device is open.
b
Wait 20 minutes after switching off the main power supply before opening the
enclosure.
Gas
WARNING
Risk to health through contact with protective gas
Residual amounts of protective gas could emerge uncontrolled when the device is
opened directly after switching off. This means that the device represents an increased
health risk and a risk of suffocation when using inert protective gases.
b
Wait 20 minutes after switching off the main power supply before opening the
enclosure.
DANGER
Hazard through gas escaping when the sender/receiver unit is swiveled out
Overpressure in the gas duct can cause hot and/or noxious gases to escape when the
sender/receiver unit is swiveled out.
b
Swivel the sender/receiver unit out only when you have taken suitable safety mea‐
sures.
b
Set the lever on the purge air fixture to the “Close” position".
11
DECOMMISSIONING
86
O P E R A T I N G I N S T R U C T I O N S | GM700 Ex
8019532/100Q/V1-1/2018-08 | SICK
Subject to change without notice