Grundfos PM 1 Data Booklet

7
Applications
Grundfos Pressure Manager
PM 1 or PM 2 installed in connection with a CH pump
If the pump inlet pressure exceeds the start pressure of
the PM unit, the pump will be started due to flow when
water is consumed, i.e. the PM units will still start the
pump when water is consumed even though the pump
inlet pressure is higher than the start pressure of the
unit.
Note that the pump will stop at p
max.
= H
max.
+ p
inlet
.
H
max.
is for the pump.
If this pressure causes problems, the PM 2 can be set
to stop at p
start
+ 1 bar, but only when installed together
with an external pressure tank.
In this case, the pump is operated like a pump with
a conventional pressure switch, but with additional
protection of the pump, i.e. dry-running protection,
cycling alarm, etc.
Fig. 7 Boosting of mains water pressure – only allowed
in some countries
TM04 4820 2109
CH
PM 1/PM 2

Grundfos PM 1 Specifications

General

Brand	Grundfos
Model	PM 1
Category	Controller
Language	English