Mechanical Installation; Location - Grundfos PM Rain Installation And Operating Instructions Manual

4.2 Mechanical installation

Use a suitable thread seal tape on the
Note
male and female threads of the
PM Rain.
Install the unit on the discharge side of the pump.
The unit has a built-in non-return valve.
The unit can be connected directly to the pump
discharge port or between the pump and the first
tapping point.

4.3 Location

The unit must be positioned so that it is protected
from rain and direct sunlight.
The unit can be installed in systems with or without a
pressure tank.
A mounting bracket for wall mounting
Note
can be ordered separately.
Mains water
Fig. 2 PM Rain and JP pump
We recommend PM Rain and JP pump
for positively fed systems only, for
Note
example above-ground collecting
tanks.
Mains water
Fig. 3 PM Rain and SB pump
We recommend PM Rain and SB pump
Note
for suction applications, for example
underground collecting tanks.
Fig. 4 Installation example
Pos. A in fig. 4:
We recommend you to install the unit so that the
height between the unit and the highest tapping point
does not exceed the values in the table below.
Start pressure set
[bar] [kPa]
2.5* 250
3.0 300
3.5 350
4.0 400
4.5 450
5.0 500
5.5 550
6.0 600
* Default setting.
See section 5.1 DIP switches.
Maximum height
[m]
21
26
31
36
41
46
51
56
5