Electronic Unit - Grundfos SEG AUTOAdapt Service Instructions Manual

11.2.3 Fitting the impeller
CAUTION
Sharp element
Minor or moderate personal injury
- Be careful of the sharp edges of the impeller.
1. Fit the impeller (49).
2. Fit and tighten the adjusting nut (68). See section
and lubricants.
11.2.4 Fitting the pump housing
1. Fit the grinder head (45). Make sure that the projections on
the back of the grinder head engage with the holes in the
impeller (49).
2. Fit the locking ring (66) on the screw (188a). Make sure that
the locking ring is fitted correctly.
3. Turn the motor to the vertical position and lift it up with a hoist.
4. Fit the motor on the pump housing (50).
The pump housing must engage with the guide pin.
The pump outlet must point in the opposite direction
to the electronic unit.
5. Close the clamp (92). See section
6. Turn the pump to the horizontal position with a hoist. Remove
the screw (188a), locking ring (66) and grinder head (45).
7. See section
12.1 Tightness
11.2.5 Adjusting the impeller clearance
See section
10.5 Adjusting the impeller
11.2.6 Fitting the grinder system
1. Fit the grinder head (45). Make sure that the projections on
the back of the grinder head engage with the holes in the
impeller (49).
Pay special attention to assembling the grinder head.
Moving the grinder head may also move the
adjusting nut resulting in wrong impeller clearance.
Make sure that the grinder head rotates freely and
noiselessly.
2. Fit the locking ring (66) on the screw (188a). Make sure that
the washer is fitted correctly.
3. Fit the screw (188a) including locking ring (66) to the shaft
end and tighten to 20 Nm ± 2. Insert the punch (F) to prevent
the impeller from moving.
4. Fit the grinder ring (44). Make sure that the grinder head does
not drag on the grinder ring.
5. Fit the screw (188a) on the feet of the pump housing. See
section
8. Torques and lubricants.
6. Fill oil into the oil chamber. See
the motor oil.
8. Torques
8. Torques and lubricants.
tests.
clearance,
10.3 Checking and changing

11.3 Electronic unit

11.3.1 Opening the electronic unit
1. Clean the pump around the electronic unit to protect the
electronic parts from dirt when opening the electronic unit.
2. Place the pump on the side with the level sensor pointing
upwards. See fig. 16.
Be careful not to disconnect the wires.
Fig. 16 Correct opening of the electronic unit
3. Remove the four screws (188a) and place the electronic unit
next to the pump on a block or similar support. See fig. 17.
Fig. 17 Electronic unit on a block
4. Raise the pump to the vertical position. See fig. 18.
Fig. 18 Pump in the vertical position
5. Remove the O-ring (90b) from the electronic unit.
6. Clean the contact surfaces of the stator housing and the
electronic unit. Clean the O-ring groove.
15