Grundfos NK Montage- Und Betriebsanleitung Seite 20
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Andere Handbücher für NK:
- Anleitung (40 Seiten) ,
- Montage- und betriebsanleitung (20 Seiten) ,
- Installationsanleitung (14 Seiten)
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Verfügbare Sprachen
Verfügbare Sprachen
1: Pouring of foundation
We recommend the following procedure to ensure a good foundation.
Step
Action
Use an approved, non-shrinking concrete. (Contact your
concrete supplier for advice if any doubts.)
Pour the foundation without interruptions to within
1
19-32 mm of the final level. Use vibrators to ensure that
the concrete is evenly distributed. The top surface should
be well scored and grooved before the concrete sets.
This provides a bonding surface for the grout.
Embed foundation bolts in the concrete. Allow enough
2
bolt length to reach through grout, shims, lower base
frame, nuts and washers.
Let the foundation cure for several days before the base
3
frame is shimmed and grouted.
2: Shimming of base frame
Step
Action
Lift/jack up the base frame to the final level 19-32 mm
above the concrete foundation, and support the base
1
frame by means of blocks and shims both at the
foundation bolts and midway between bolts.
Level the base frame by adding or removing shims under
2
the base frame.
Tighten the foundation bolt nuts against the base frame.
3
Make sure the piping can be aligned to the pump flanges
without putting strain on pipes or flanges.
3: Preliminary alignment
Warning
Before starting work on the pump, make sure that
the power supply has been switched off and that
it cannot be accidentally switched on.
The pump and motor are pre-aligned on the base frame from the
factory. Some deformation of the base frame may occur during
transport and it is therefore essential to check alignment at the
installation site prior to final grouting.
A flexible coupling will only compensate for minor misalignments
and should not be used to compensate for excessive
misalignment of the pump and motor shafts. Inaccurate alignment
results in vibration and excessive wear on the bearings, shaft or
wear rings.
20
Illustration
Bolt length
above base
frame
Thickness of
base frame
19 to 32 mm
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allowance for
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grout
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Washer
Lug
Illustration
Warning
Carry out alignment of the motor only as piping
strain will occur if the pump is shifted.
Carry out alignment of the motor by placing shims of different
thickness under the motor. If possible, replace several thin shims
with one thick shim.
Alignment, see section 6.3 Alignment.
Base frame
Wedges and
shims left in
place
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Top of foundation
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left rough
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Pipe sleeve
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