Brochure

Functions
MAGNA3
8
29
Differential temperature
The differential-temperature control mode is available
from model B which will be released in 2014. The
production code is stated on the nameplate. See fig.
30.
Fig. 30 Production code on nameplate
This control mode ensures a constant differential
temperature drop across heating and cooling systems.
In this control mode, the pump will maintain a constant
differential temperature between the pump and the
external sensor. See fig. 31 and fig. 32.
Fig. 31 Differential temperature
Temperature sensor
If the pump is installed in the flow pipe, the internal
temperature sensor can be used. An external
temperature sensor must be installed in the return pipe
of the system. The sensor must be installed as close
as possible to the consumer (radiator, heat exchanger,
etc.). See fig. 32.
Fig. 32 Differential temperature
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. 33 Constant temperature control
The inverse control for cooling application is available
from model B.
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. 34. The sensor must be
installed as close as possible to the consumer
(radiator, heat exchanger, etc.).
Fig. 34 Pump with external sensor
TM05 8798 5113
TM05 2451 5111
H
Q
Δt
TM05 8235 2113TM05 2451 5111 TM05 2615 0312
t
F
t
t
R
H
Q
t
F
t
R