Repair work
Instruction Manual VisGuard 2 Extractive
14265E/1
35
10.2
Replacing the valve unit ST2MP3
Replacing individual valves is quite time consuming and relatively difficult. Therefore, this
work should be carried out by a service engineer. Proceed as follows to replace the entire va-
lve unit:
WORKSTEP
ADDITIONAL INFO / IMAGES
1.
Number all electrical cables and hose
connections.
2.
Interrupt the power supply to the valves.
3.
Make a sketch of all connections to avoid conf u-
sion afterwards.
4.
Open all the valves.
5.
Remove the electrical connections of the indivi-
dual valves.
6.
Remove the hose connections to the valve unit.
7.
Remove the defective valve unit and replace with
a new one.
8.
Establish all the electrical connections according
to the sketch.
9.
Attach the hose connections to the valve unit.
10. Put the sampling system back into operation
(Section 7).
