WIKA FSD-3 Manual De Instrucciones página 12

5. Commissioning, operation
5.1.2 Recommended mounting positions
Horizontal pipes
EN
Risers and vertical pipes
Mounting the flow switch in downpipes open towards the bottom is forbidden. This use does not comply with the intended use.
12
Only if the pipeline is free from
deposits.
WIKA operating instructions flow switch, model FSD-3
Only if the pipeline is completely filled
with medium.