Dilo SF6 - Page 34

Functional description
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Evacuation at port 602:
It is possible to evacuate air at port 602 in parallel to all other functions. The function is started
independent of the selector switch position (0 – 9).
Function “start / stop” key
Pressure indication at port 602
To avoid mixing of ambient air with SF
6
gas the gas compartment must be evacuated beforehand.
1. Connect the gas compartment to pos. 602.
If there is gas overpressure (pressure indication on the operating panel) the gas must
be recovered beforehand (see “Removal and storage of SF
6
“)
2. Start the evacuation function by pressing the green “I“ key. If there is a too high pressure on the
valve upstream from the vacuum pump the solenoid valve does not open and the vacuum pump
does not start. Reduce the overpressure.
3. After having reached the set final vacuum the function stops automatically and the ‘vacuum test’
message appears.
4. In case the vacuum (during the holding time) is lower than the input value, the “function
completed“ message appears.
If the vacuum (during the holding time) exceeds the input value the “vacuum rise” message
appears.
5. Press the red “0“ key and the “function completed“ respectively the “vacuum rise” message
disappears.