Brochure

Functions
MAGNA3
8
31
When Q
max
is reached, the FLOW
LIMIT
function will
reduce the pump speed to ensure that the flow never
exceeds the FLOW
LIMIT
set, no matter if the system
requires a higher flow due to a reduced resistance in
the system. See fig. 39, 40 or 41.
Fig. 39 Proportional pressure control with FLOW
LIMIT
Fig. 40 Constant pressure control with FLOW
LIMIT
Fig. 41 Constant curve with FLOW
LIMIT
Automatic Night Setback
Once Automatic Night Setback has been enabled, the
pump automatically changes between normal duty and
night setback (duty at low performance).
When Automatic Night Setback has been enabled, the
pump will run on the min. curve.
Changeover between normal duty and night setback
depends on the flow-pipe temperature.
The pump automatically changes over to night setback
when the built-in sensor registers a flow-pipe
temperature drop of more than 18 to 27 °F (10 to 15
°C) within approx. two hours. The temperature drop
must be at least 1.8 °F/min (0.1 °C/min).
Changeover to normal duty takes place without a time
lag when the temperature has increased by approx. 18
°F (10 °C).
Note: Automatic Night Setback cannot be enabled
when the pump is in constant curve mode.
TM05 2543 0412TM05 2544 0312TM05 2542 0412
H
Q
2
H
set
H
set
Normal proportional pressure
duty point
FLOW
LIMIT
duty point
H
Q
H
set
Normal constant pressure
duty point
FLOW
LIMIT
duty point
H
Q
Normal constant curve
duty point
FLOW
LIMIT
duty point