Functions - Grundfos MAGNA 40-120 Montage- Und Betriebsanleitung

7. Functions

Most functions can be selected on the pump control panel. However, some functions can only be selected with
the R100 or via expansion modules.
On the pump control panel, see fig. 19, page 20:
• AUTO (factory setting)
ADAPT
Recommended for most heating installations.
During operation, the pump automatically makes the necessary adjustment to the actual system
characteristic. This setting ensures minimum energy consumption and noise level which reduces operating
costs and increases comfort.
• Proportional-pressure control
The pump head is changed continuously in accordance with the water demand in the system. The desired
setpoint can be set on the pump control panel.
• Constant-pressure control
A constant head is maintained, irrespective of water demand. The desired setpoint can be set on the pump
control panel.
• Automatic night-time duty
The pump changes automatically between normal duty and night-time duty depending on the flow-pipe
temperature. Automatic night-time duty can be combined with the above-mentioned control modes.
Further functions:
Via the digital input:
• External start/stop
The pump can be started or stopped via the digital input.
With the R100 remote control:
• Constant-curve duty
The pump runs at a constant speed, on or between the max. and min. curves.
• Temperature influence
The head varies depending on the liquid temperature.
• External fault and operating signal
The pump controls an external fault or operating signal device via a potential-free output.
Via expansion modules:
GENI module
• External analog control of head or speed via a signal from an external 0-10 V signal transmitter.
• External forced control via inputs for:
- Max. curve,
- Min. curve.
• Bus communication via GENIbus
The pump can be controlled and monitored by a Grundfos Control MPC Series 2000, a building
management system or another type of external control system.
• Control of twin-head pumps
The control of twin-head pumps is described in section 7.12.1.
LON module
• Bus communication via LON
This module enables connection to a network based on LonWorks
are based on this communication standard.
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technology and to other units which