Grundfos MAGNA3 Manual page 26

4
Heat energy monitor
Heat energy monitor is a monitoring function which
makes it possible to track the heat energy distribution
and consumption within a system. This prevents
excessive energy costs caused by system imbalances.
The calculated flow rate has an accuracy specified as
± xx % of Q . The lower the flow through the pump
max
is, the less accurate the reading will be. Furthermore,
the temperature measurements needed for the
calculation is also associated with some inaccuracy,
depending on the sensor type. Therefore, you cannot
use the heat energy value for billing purposes.
However, the value is perfect for optimization purposes
in order to prevent excessive energy costs caused by
system imbalances. See also
pump, page 25.
on the
The pump requires a temperature sensor in the flow
pipe or the return pipe. This temperature sensor is not
supplied with the pump.
t
F
t
R
Fig. 34 MAGNA3 with built-in heat energy monitor
Note: MAGNA3 incorporates a calculator for flow and
media temperature, see
page 59.
Operating log
The Operating log is the perfect tool for pump
optimization, replacement and fault finding as it offers
the following:
• All duty points and operating conditions are tracked
and stored in the pump.
• The 3D work log and duty curve (over time) provide
instant overviews of historical pump performance
and operating conditions.
Fig. 35 Example of Operating log
26
Readings and settings
kWh
External Grundfos sensors,
Help and guidance
The Assist menu guides you through the setup of the
pump and offers the following:
• step-by-step instructions in how to set the pump
• a short description of the six control modes and
recommended applications
• assistance with fault correction
• fault advice
• multipump setup
• setup, analog input
• description of control mode.
Grundfos Eye
Grundfos Eye at the top of the operating panel is a
pump status indicator light providing information about
the pump operating status.
The indicator light will flash in different sequences and
provide information about the following:
• power on or off
• pump warnings
• pump alarms
• remote control
• pump running or stopped.
The function of Grundfos Eye is described in detail in
the installation and operating instructions.
Fig. 36 Grundfos Eye
MAGNA3