Grundfos AQtap Service Instructions With Installation And Operating Instructions page 34

5. Remove the upper part of the hydraulic part.
6. Remove the solenoid valve and the gaskets.
7. Replace the gaskets and the solenoid valve. Fix the solenoid
valve with the union nut.
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8. Place the upper part of the hydraulic part and fix it with the
union nuts.
9. By means of two wrenches tighten the union nuts.
– Torque (left side, top of flow sensor) = 25 ±2 Nm
– Torque (right side, top and bottom of solenoid valve)
= 60 ±5 Nm
Size Torque [Nm]
M20 25 ±2
Size Torque [Nm]
M20
10. Insert the coil plug.
60 ±5