Submittal Sheet

Product description
MAGNA3
1
3
1. Product description
The Grundfos MAGNA3 model D circulator pumps are
designed for circulating liquids in systems with variable
flow requirements where you want to optimize the
setting of the pump duty point, thus reducing energy
costs.
Applications
• Heating systems
– main pump
– mixing loops
– heating surfaces
• air-conditioning and cooling systems
• domestic hot-water systems
• ground source heat-pump systems
• solar-heating systems.
The MAGNA3 circulator pump is perfect for both new
systems as well as for replacement. The pump is ideal
when operating in systems requiring an automated
adjustment of pressure. This pump range is the best
choice as it eliminates the need for expensive bypass
valves and similar components.
Furthermore, the pump is appropriate for systems with
hot-water priority as an external signal can
immediately force the pump to operate according to
the maximum curve, for example in solar-heating
systems. When using the pumps in domestic hot-water
systems, please observe local legislation regarding
pump house material. Grundfos strongly recommends
that you use stainless-steel pumps in domestic
hot-water applications to avoid corrosion.
Application wizard
MAGNA3 features a built-in application wizard, which
is accessed via the pump's operating panel. By
specifying your system step by step, the application
wizard identifies the best suited control mode for your
application.
See Application wizard, page 42.
Duty range
To ensure correct operation, it is important that the
duty points in the system match the duty range of the
pump.
Characteristic features
•AUTO
ADAPT
.
•FLOW
LIMIT
.
•FLOW
ADAPT
- a combination of the AUTO
ADAPT
control mode and FLOW
LIMIT
function.
• Built-in Grundfos differential-pressure and
temperature sensor.
• Proportional-pressure control.
• Constant-pressure control.
• Constant-temperature control.
• Constant-curve duty.
• Maximum or minimum curve duty.
• Automatic night setback.
• Self-explanatory user interface with TFT display and
high quality silicone push-buttons.
• Heat energy monitor.
• Wireless multipump function.
The complete range is available for a maximum
system pressure of 175 psi (12 bar, 1.2 MPa), PN 12.
Benefits
• Low energy consumption due to the AUTO
ADAPT
function, allowing the pump to adjust automatically
to external factors, such as outside temperatures
and consumption patterns.
• Simple installation.
• No maintenance and long life.
• Operating log history.
• Easy and simple system optimization.
• External control and monitoring enabled via add-on
modules.
• No external motor protection required.
• Insulating shells for heating systems supplied with
single-head pumps.
• Wide temperature range due to thermal separation
of the control box and pump media.
TM05 8894 2813
Data
MAGNA3 (N)
Single-head
pumps
MAGNA3 D
Twin-head
pumps
Maximum flow rate
345 gpm
(78.5 m
3
/h)
484 gpm
(110 m
3
/h)
Maximum head 60 ft (18 m)
Maximum system pressure 175 psi (1.2 MPa) (12 bar)
Liquid temperature 14 to 230 °F (-10 to +110 °C)