Vibration Dampening; Outdoor Installation; Hot Or Cold Surfaces; Torques - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

6.2 Vibration dampening

If you use vibration dampers, install them under the foundation.
Pumps with motor size below or equal to 30 kW can use vibration
dampers as shown in fig. 11.
For pumps with motor sizes above or equal to 37 kW, use a
®
Sylomer plate as shown in fig. 12.
Vibration dampers
Fig. 11 Pump on vibration dampers
®
Sylomer plate
®
Fig. 12 Pump on Sylomer

6.3 Outdoor installation

When installed outdoors, we recommend that you provide the
motor with a rain cover. We also recommend that you open one of
the drain holes in the motor flange.
10
plate

6.4 Hot or cold surfaces

Warning
When pumping hot or cold liquids, make sure that
persons cannot accidentally come into contact with
hot or cold surfaces.
Figure 13 shows which pump parts get as hot or cold as the
pumped liquid.
Fig. 13 Hot or cold surfaces on a CR, CRI, CRN pump

6.5 Torques

To minimize risk of damage to the equipment, make
Caution
sure to tighten bolts according to recommendations.
The table shows the recommended torques for bolts in base and
flanges.
Base
CR, CRI, CRN
[Nm]
1s-5 40 M10
10-20 50 M12
32-150 70 M16
M20
M24
The bolt quality must be minimum 8.8.
Pump head
Pump sleeve
Base
Flange [Nm]
DIN, JIS, ANSI Oval
- 50-60
60 60-70
100 70-80
150 -
200 -