Grundfos MAGNA1 C Series User Manual

English (GB)
21
7.4 Overview of the control functions
Fig. 29 Control function in relation to system requirements
TM05 2778 3617
Setting Pump curve Function
PP1
Lowest proportional-pressure
curve
The duty point of the pump will move up or down on the lowest proportional-pressure curve,
depending on the flow rate demand.
The head is reduced at falling flow rate demand and increased at rising flow rate demand.
PP2
Intermediate
proportional-pressure curve
The duty point of the pump will move up or down on the intermediate proportional-pressure
curve, depending on the flow rate demand.
The head is reduced at falling flow rate demand and increased at rising flow rate demand.
PP3
Highest
proportional-pressure curve
The duty point of the pump will move up or down on the highest proportional-pressure curve,
depending on the flow rate demand.
The head is reduced at falling flow rate demand and increased at rising flow rate demand.
CP1
Lowest constant-pressure
curve
The duty point of the pump will move out or in on the lowest constant-pressure curve,
depending on the flow rate demand in the system.
The head is kept constant, irrespective of the flow rate demand.
CP2
Intermediate
constant-pressure curve
The duty point of the pump will move out or in on the intermediate constant-pressure curve,
depending on the flow rate demand in the system.
The head is kept constant, irrespective of the flow rate demand.
CP3
Highest constant-pressure
curve
The duty point of the pump will move out or in on the highest constant-pressure curve,
depending on the flow rate demand in the system.
The head is kept constant, irrespective of the flow rate demand.
III Speed III
The pump runs on a constant curve which means that it runs at a constant speed.
At speed III, the pump is set to run on the maximum curve under all operating conditions.
You obtain quick venting of the pump by setting the pump to speed III for a short period.
II Speed II
The pump runs on a constant curve which means that it runs at a constant speed.
At speed II, the pump is set to run on the intermediate curve under all operating conditions.
I Speed I
The pump runs on a constant curve which means that it runs at a constant speed.
At speed I, the pump is set to run on the minimum curve under all operating conditions.
Q
III
II
I
H
PP3
CP3
CP2
PP1
CP1
PP2

Grundfos MAGNA1 C Series Specifications

General

Head	Up to 12 m
Maximum Operating Pressure	10 bar
Power Supply	1 x 230 V, 3 x 400 V
Insulation Class	F
Type	Circulator Pump
Pump Housing	Cast Iron
Approvals	CE, EAC
Connection Type	Flanged or threaded
Material	Cast Iron
Weight	Varies depending on model