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5
6. Mechanical installation
Before installing the pump, check that the pump type
and parts are as ordered.
6.1 Installation of pump
Install the pump on a plane surface using the
mounting holes in the motor base plate and a
minimum of four bolts. Tighten each of the four bolts
to a torque of 10 Nm.
Install the pump so that air locks are avoided in the
pump housing and pipework.
Figure 1 and the table below show the permissible
pump positions.
Fig. 1 Pump positions
● Mounting in this position is allowed.
Install the pump so that inspection, maintenance and
service can easily be performed.
Install the pump in a well-ventilated location.
6.2 Pipework
We recommend that you fit isolating valves on either
side of the pump. It is thus not necessary to drain the
system if the pump needs service.
If the pump is installed above the liquid level, a
non-return valve must be fitted in the suction pipe
below the liquid level. See fig. 4.
If the pump is to be used for pumping rainwater or
well water, we recommend that you fit a filter to the
inlet of the suction pipe.
The pump must not be stressed by the pipework.
Install the pipes according to the design
requirements given in EN ISO 13480-3:2012.
Tolerances must comply with EN ISO 13920:1996,
class C.
The pipework must be correctly sized taking due
account of the pump inlet pressure.
Install the pipes so that air locks are avoided,
especially on the suction side of the pump. See fig.
2.
Fig. 2 Pipework
6.2.1 Pipe connection (non-self-priming pumps)
Fig. 3 Suction and discharge ports
Warning
When pumping hot or cold liquids, make
sure that persons cannot accidentally
come into contact with hot or cold
surfaces.
TM05 6389 4712
Pump
position
Non-self-priming
pumps
Self-priming
pumps
1- -
2 -
3 -
4
5- -
6
Self-priming pumps:
We recommend an opening pressure of
the non-return valve which is lower than
0.05 bar. Otherwise the additional
resistance will reduce the suction
capability of the pump.
TM04 0338 0608
Take care not to damage the pump when
connecting the suction and discharge
pipes.
Torque: 50-60 Nm. The stated torque must
not be exceeded.
TM04 0358 1008
Discharge port
Suction port
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