2.
If water flows out of the sampling tap, the system is not under
negative pressure and is working correctly
If air is drawn in, this means that there is nega‐
tive pressure in the system. In this case, throttle
the valve at the point at which the sample water
pipe enters the filtration circuit - the pressure
should not exceed 2 bar.
3.
Use the stopcock on the sample water drain to finely adjust
the system
5.3.2
Sensors
Observe the operating instructions for the sensors.
1.
Close the shut-off valves upstream and downstream of the
in-line probe housing
2.
Remove the transparent protective cap from the ball-shaped
end of the redox sensor
3.
Manually screw the redox sensors into separate threaded
holes on the in-line probe housing. Then carefully tighten
using an SW 17 open-ended spanner until the threaded con‐
nector is tight
4.
Testing the sensors' hydraulic installation: Adjust the flow
using the shut-off valve to 20... 60 l/h
ð
Check whether the threaded connectors on the in-line
probe housing are tight.
Redox sensor installation
Assembly
20