Grundfos CRT, Installation And Operating Instructions Manual

Page: 7 / 144

English (GB)
7
6.1 Foundation
Grundfos recommends to install the pump on a concrete
foundation which is heavy enough to provide permanent and rigid
support to the entire pump. The foundation must be capable of
absorbing any vibration, normal strain or shock. The concrete
foundation must have an absolutely level and even surface.
Place the pump on the foundation, and fasten it. The base plate
must be supported on the whole area.
The following instruction applies when mounting the pump in
vertical and horizontal position.
Place the pump on the foundation, and fasten it. See fig.
5 .
Fig. 5 Correct installation
Fig. 6 Foundation, vertical mounting
The recommended length and width are shown in fig. 6 . Note that
the length and width of the foundation for pumps with motor size
≤
30 kW must be 200 mm larger than the base plate.
For pumps with motor size
≥
37 kW, the length and width must
always be 1.5 x 1.5 (L
f
x B
f
) metres.
Fig. 7 Foundation, horizontal mounting
The foundation length and width should always be 200 mm larger
than the length and width of the pump. See fig.
7 .
The mass of the foundation must be at least 1.5 times the total
mass of the pump. The minimum height of the foundation (h
f
) can
then be calculated:
The density (
δ
) of concrete is usually taken as 2,200 kg/m
3
.
In installations where noise-less operation is particularly
important, we recommend you to use a foundation with a mass up
to 5 times that of the pump.
The foundation must be provided with bolts for fixing the base
plate. See fig.
8 .
Fig. 8 Bolt in foundation
When the foundation bolts are in position, the pump can be
placed on the foundation. The base plate can now be aligned
using shims, if necessary, so that it is completely horizontal.
See fig.
9 .
Fig. 9 Alignment with shims
Note
The foundation/installation must be carried out in
accordance with the following instructions.
Non-compliance may result in functional faults which
will damage the pump components.
T
M
04
03
42
06
08
T
M
04
03
43
06
08
TM
05 957
9
41
13
h
f
=
m
pump
×
1.5
L
f
×
B
f
× δ
concrete
TM
03 45
89 220
6
TM
0
4
0
362
0
608
Shims