Grundfos MAGNA3 D Installation And Operating Instructions Manual page 44

9.5.1 "Heat energy monitor"
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"Home" > Status > "Heat energy monitor"
The "Heat energy monitor" calculates the heat energy
consumption within a system. For detailed information, see
section 8.11.5 Heat energy monitor.
Learn how to set an input temperature sensor for monitoring heat
energy, in section 9.7.4 "Setup, analog input".
The following submenus are explored in the following:
• Heat energy
• Estimated flow
• Accuracy of values.
"Heat energy"
Navigation
"Home" > Status > "Heat energy monitor" > "Heat energy"
You can measure both heating and cooling in the same system. If
a system is used for both heating and cooling, two counters are
automatically shown in the display.
The time stamp of the date indicates the latest use of the specific
counter.
The value of "Latest year (2):" represents the last 52 consecutive
weeks where the pump has been supplied with power. The user
can reset the value manually. See section "Delete history", page
53.
44
"Estimated flow"
Navigation
"Home" > Status > "Heat energy monitor" > "Estimated flow"
The internal sensor estimates the difference in pressure between
the inlet and outlet ports of the pump. The measurement is not a
direct differential-pressure measurement, but by knowing the
hydraulic design of the pump, you can estimate the differential
pressure across the pump.
For further information, see section 8.7 Flow estimation accuracy.
"Accuracy of values"
Navigation
"Home" > Status > "Heat energy monitor" > "Accuracy of values"
This menu offers the following options:
• Estimated flow
• Volume.
Select submenu with or .
This menu allows you to view the current flow rate tolerance and
the average volume accuracy over the last 52 consecutive weeks
("Latest year") and the pump's entire life span.
The table in section 8.8 Flow accuracy table shows the flow
accuracy of the complete MAGNA3 range.