Brochure

Product range
MAGNA3
3
13
Constant temperature
In heating systems with a fixed system characteristic,
for example domestic hot-water systems, the control of
the pump according to a constant return-pipe
temperature is relevant.
Fig. 13 Constant-temperature control
If the pump is installed in the return pipe of the system,
the internal temperature sensor can be used. In this
case, the pump must be installed as close as possible
to the consumer (radiator, heat exchanger, etc.).
Fig. 14 Pump with internal sensor
Temperature sensor
If the pump is installed in the flow pipe, an external
temperature sensor must be installed in the return pipe
of the system. See fig. 13. The sensor must be
installed as close as possible to the consumer
(radiator, heat exchanger, etc.).
Fig. 15 Pump with external sensor
Differential Temperature
This control mode ensures a constant differential
temperature drop across a heating system. The pump
should be installed in the flow pipe so the built-in
sensor measures the fluid temperature going out to the
load. An external temperature sensor must be installed
in the system to measure the fluid temperature
returning from the heating load. In this mode, the pump
will maintain a constant temperature.differential
between the pump and the external sensor. See figure
16 and 17.
Fig. 16 Differential-temperature control
Temperature Sensor
With the pump installed in the flow pipe, an external
temperature sensor may be installed in the return pipe
of the system. The sensor should be installed as close
to the consumer (radiator, heat exchanger, etc.). The
pump can be then set to maintain a constant
temperature drop between the integrated temperature
sensor in the pump and the external temperature
sensor installed in the system.
Fig. 17 Pump with external sensor
TM05 2451 5111TM05 2616 0312 TM05 2615 0312
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TM05 2451 5111
Note
Note
This mode requires use of the GRUNDFOS
GO to adjust the Kp and Ti values for
temperature control for the specific system.
TM05 8235 2113
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