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Grundfos PM 1
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4.3.3 Removing the pressure sensor
1. Follow the instructions in section 4.3.1 Removing the electronic unit.
2. Remove plug for sensor (pos. 13).
3. Note how the sensor is positioned.
Fig. 9 Correct fitting of sensor
4. Unscrew pressure sensor (pos. 12) counter-clockwise until it is free.
4.3.4 Fitting the pressure sensor
1. Screw the pressure sensor (pos. 12) until its tightened. See fig. 10. Then check the position according to fig. 9
and the note made in step 3. Note how the sensor is positioned.
Fig. 10 Correct fitting of sensor
2. Fit plug for sensor (pos. 13) in the sensor (pos. 12).
3. Follow the instructions in section 4.3.2 Fitting the electronic unit.
TM04 5192 2809
Caution
If the pressure sensor not is in the allowed area, then it is because the can be tightened further
or the thread is damaged. If the thread is damaged then the PM unit must be replaced.
Note
When the pressure sensor is tightened, then it is not allowed afterwards to turn it
counterclockwise.
TM04 4802 2109

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