4.2.3 Exchanging the pressure sensors
When pressure reading on the controller gives unexpected results, check the pressure sensors
by calibrating them (see 4.2.1 Calibrating the pressure sensors).
When the controller display shows a sensor error, and you are sure that during the calibration
there was no pressure, flow or vibration, then the pressure sensors (Art. no.11221) must be
exchanged.
Before you start:
● Make sure you have threadlocker available that is suitable for drinking water (for
example LOCTITE 243). Threadlocker is used to lock the pressure sensor to the valve
block.
● You will need a 22 mm torque wrench (for 10 Nm).
● Make sure that the O-ring flat seal is present on the new pressure sensor (see figure).
To exchange a pressure sensor:
1. Remove the controller from the valve block as described in 4.2.2 Removing the
controller from the valve block.
2. Remove the cable from the existing pressure sensor. If both pressure sensors are
replaced, mark the cables to make sure that you connect them to the correct sensor
after replacing.
3. Remove the pressure sensor using a 22 mm wrench.
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