Installation Of The Pump; Pipes; Alternative Connection Positions - Grundfos CM-L Series Installation And Operating Instructions Manual

3.2 Installation of the 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 pockets are avoided in
the pump housing and pipes.
Figure 1 and the table below show the permissible
pump positions.
2
1
7
Fig. 1 Pump position
Pump position
1
2
3
4
5
6
7
● Mounting in this position is allowed.
❍ Mounting in this position is allowed if the terminal
box is set to an angle of 45 ° pointing upwards.
Install the pump so that inspection, maintenance and
service can easily be performed.
Install the pump in a well-ventilated location.
4
Up
3
4
5
6
Floor
CM-L
-
-
-
●
-
-
❍

3.3 Pipes

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.
Install the pipes so that air pockets are avoided,
especially on the inlet side of the pump. See fig. 2.
Fig. 2 Pipes
3.3.1 Pipe connection
Take care not to damage the pump when
connecting the inlet and outlet pipes.
Torque: 50-60 Nm. The stated torque must
not be exceeded.
The inlet and outlet pipes must be
supported so that stress on the pump inlet
and outlet connections is avoided.
Outlet port
Fig. 3 Inlet and outlet ports

3.4 Alternative connection positions

The pump is available with various connection
positions on special request. See fig. 4.
Fig. 4 Alternative connection positions
Inlet port