Product Description - Grundfos MAGNA3 Manual

MAGNA3

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.
Duty range
MAGNA3 (N)
Data Single-head
345 gpm
Maximum flow rate
(78.5 m
Maximum head
Maximum system pressure
Liquid temperature 14 to 230 °F (-10 to +110 °C)
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 - a combination of the AUTO
ADAPT
control mode and FLOW
LIMIT
• 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
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.
MAGNA3 D
Twin-head
pumps pumps
484 gpm
3 3
/h) (110 m /h)
60 ft (18 m)
175 psi (1.2 MPa) (12 bar)
ADAPT
function.
ADAPT
1
3