MAGNA3 Pumps Product Guide

Functions
MAGNA3
8
23
Solar heating systems
Fig. 22 Functional drawing of a solar heating system
Main pumps
Solar heating systems operate with very low flows
compared to other heating systems, however, with
relatively large pressure losses. With a conventional
circulator pump, the flow must be minimized with a
valve resulting in a significantly higher power
consumption. To achieve major reductions in power
consumption, the MAGNA3 is optimized with the
FLOW
ADAPT
/ FLOW
LIMIT
control mode for operation
specifically under these conditions.
Ground source heat pump systems (GSHP)
Fig. 23 Ground source heat pump system in a commercial
building
Main pump
The MAGNA3 is optimized for operation as circulator
pump in a closed-loop pipe system which is buried in
the ground and filled with a mixture of water and
antifreeze. The MAGNA3 is therefore ideal for large
ground source heat pump systems for commercial
buildings.
The MAGNA3 is designed for pumping liquids down to
+14 °F (-10 °C). It can cope with all known antifreeze
compositions.
It is very important that all components are highly
energy-efficient. No other circulator pump performs
better in GSHP systems than the MAGNA3 with the
FLOW
ADAPT
/ FLOW
LIMIT
control mode.
Use the benefit of the inputs/outputs of the MAGNA3 to
control the pump together with the heat pump.
Installation and commissioning
When installing MAGNA3, no external pressure sensor
or motor protection is required. Installation is simple
thanks to the built-in differential pressure and
temperature sensor, which enables proportional
pressure control without the installation of a sensor in
the system.
In systems where a differential pressure is desired at a
certain point of the system, an external pressure
sensor must be installed.
Pump selection is based on required flow and
calculated pressure losses. We recommend not to
oversize the pump as it will lead to unnecessarily high
energy consumption.
The MAGNA3 features the FLOW
LIMIT
function. In
circuits where the MAGNA3 has full authority, the need
for external pump throttling valves is reduced. The
FLOW
LIMIT
ensures that the rated flow is never
exceeded.
TM05 3421 1312
M
M
TM05 3422 1312
Pos. Description
Heat pump
1
1