Grundfos PS.G Series, Инструкция по установке и эксплуатации

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English (GB)
8
3. Position the pit correctly so that the flanges are in the right
direction in relation to the inlet and outlet pipes.
Fig. 7 How to fill the hollow space with concrete
Fig. 8 Securing the mounting brackets
4. Fit the mounting brackets, washers and M20 F8.8 nuts, and
tighten the nuts to 430 ± 10 Nm.
4.2.1 Backfill
• The backfill must provide sufficient support of the pit on all
sides and ensure that the load can be transferred without
detrimental point impacts or similar impacts.
• The backfill material must be compactable gravel or sand with
an even particle size. The maximum particle size is 32 mm.
The backfill material must not contain any stones larger than
the maximum particle size.
• The backfilling must be carried out so that the pit is not
damaged or deformed.
• The backfill must be compacted in layers of maximum 50 cm.
Fig. 9 Compacted layers of maximum 50 cm
In pits with diameters of 2.0, 2.2 or 3.0 m, with outlet
pipes above DN 150 and with two holes in the bottom
of the pit, fill the hollow space below the bottom of
the pit with concrete to avoid vibrations. See fig.
7 .
TM
06 435
9 21
15
T
M
06
12
39
19
1
4
Do not lower the pit onto the anchoring bolts as they
may damage the surface of the pit.
Make sure that no residual stresses remain in the
reinforced plastic structures of the pit bottom.
430 ± 10 Nm
WARNING
Collapsing hazard
Death or serious personal injury
- Make sure the specified size of gravel is used for
the backfill.
T
M
07
1
2
49
12
18
Do not use plate compactors at a distance of less
than 30 cm from the pit wall.
TM
06
33
52
52
14
50 cm
2
≤ ∅ ≤
32 mm
Max. 50 cm