Grundfos MAGNA3 25-100 (N) User manual

GRUNDFOS INSTRUCTIONS
MAGNA3
AUTOADAPT 6.5 m
Control mode
Home Status Settings Assist
Setpoint
Estimated flow rate Head
4.0 m
8 m3/h
MAGNA3
DISPLAY MENU
OVERVIEW
Valid from
model D
GB / DE
APPLICATION
WIZARD
INCLUDING

HOME
The home screen is
congured with the most
relevant settings (as shortcut)
and status parameters.
This screen can be customised
under general settings.
STATUS SETTINGS ASSIST
Operating status
»Operating mode, from
»Control mode
Pump performance
»Max. curve and duty point
»Resulting setpoint
»Liquid temperature
»Speed
»Operating hours
Power and energy consumption
»Power consumption
»Energy consumption
Warning and alarm
Heat energy monitor
Operating log
»Operating hours
»Trend data
Fitted modules
Date and time
Pump identication
Multipump system
»Operating status
»System performance
»Power and energy consumption
»Other pump 1, multipump sys.
Setpoint
Operating mode
»Normal
»Stop
»Min.
»Max.
Control mode
»AUTOADAPT
»FLOWADAPT
»Prop. pressure
»Const. pressure
»Const. temp.
»Di. temp.
»Constant ow rate
»Constant curve
Controller settings
FLOWLIMIT
Automatic Night Setback
Analog input
»Di. pressure control
»Constant temperature control
»Di. temperature control
»Heat energy monitor
»External setpoint inuence
Relay outputs
»Relay output 1
»Relay output 2
Bus communication
»Pump number
»Forced local mode
General settings
»Enable/disable settings
»Alarm and warning settings
»Delete history
»Dene Home display
»Display brightness
»Return to factory settings
»Run start-up guide
Application wizard
»Boiler pump
»Radiator
»Fan coil unit
»Air handling unit
»Underoor/ceiling
»Hot water
»Ground source
»Chiller pump
Setting of date and time
Multipump setup
Setup, analog input
Description, control mode
»AUTOADAPT
»FLOWADAPT
»Prop. press.
»Const. press.
»Const. temp.
»Dierential temp.
»Constant curve
Assisted fault advice
»Blocked pump
»Pump communication fault
»Internal fault
»Internal sensor fault
»Dry running
»Forced pumping
»Undervoltage
»Overvoltage
»High motor temperature
»External sensor fault
»High liquid temperature
»Comm. fault, twin-head pump
»This overview only includes
operation-relevant submenus.
Wizard
*
*
Alarms and warnings
1
3
5
4
2
6

SETTINGS
Status icons in display footer
1
Operating mode
= Automatic night setback
= Change of settings - locked
= Connected to eldbus
= Multipump system
= Master pump (multipump system)
= Slave pump (multipump system)
= Forced local mode (eldbus is overridden)
Normal
Stop
Min.
Max.
The pump runs according to the selected control
mode. Operating mode overrules control mode.
See next page
The pump stops.
Minimum curve mode is used in periods
in which a minimum ow is required.
Maximum curve mode is used in periods
in which a maximum ow is required.
Control mode 2
AUTOADAPT
Prop. press.
Const. press.
FLOWADAPT
Const. temp.
Di. temp.
Constant ow
Constant curve
Δt
Δt
Δt
Δt
Operating mode can be externally controlled by digital input. 1
Δt
Δt
Δt

Proportional pressure
Constant pressure
FLOWADAPT
Constant temperature
Dierential temperature
SETTINGS
Control mode 2
Recommended for most heating systems. During operation, the pump automatically
makes the necessary adjustment to the actual system characteristic.
The FLOWADAPT control mode combines a control mode and a function:
• The pump is running in AUTOADAPT.
• The delivered ow from the pump will never exceed a selected FLOWLIMIT.
The FLOWLIMIT function can
be activated in combination
with all of the below
control modes.
Used in systems with relatively large pressure losses in the distribution pipes.
The head of the pump will increase proportionally to the ow in the system to
compensate for the large pressure losses in the distribution pipes.
We recommend this control mode in systems with relatively small pressure losses.
The pump head is kept constant, independent of the ow in the system.
In heating systems with a xed system characteristic, for example domestic hot-water
systems, the control of the pump according to a constant return-pipe temperature is relevant.
Ensures a constant dierential temperature drop across heating and cooling systems.
The pump will maintain a constant dierential temperature between the pump and the external sensor.
Δt
Δt
Δt
Δt
Two-pipe
Make sure that the operating mode is set to ”Normal” in order for the pump to run according
to the available control modes. The table shows the dierent control modes along with
a recommended application type.
2
Δt
Δt
Constant curve The pump can be set to operate according to a constant curve, like an uncontrolled pump.
Set the desired speed in % of the maximum speed in the range from minimum to 100 %.
Δt
Constant ow The pump maintains a constant ow in the system, independently of the head.
No external sensor is required.
Two-pipe
One-pipe
Underoor
Hot water
Hot water
Hot water
Two-pipe
AUTOADAPT

3
Analog input
Building
Management
System/PLC
p
Building
Management
System/PLC
Function of analog input
Dierential pressure
Constant temperature
Constant curve
Constant pressure
Proportional pressure
External setpoint inuence
External sensor feedback
Example: Linear with min.
If the local setpoint is set at 4 m (100 % reference) and
the external signal input has a maximum value (10
V or 20 mA), the resulting setpoint will be 4 m. If the
signal input is reduced by 50 %, the resulting setpoint
changes accordingly in a linear manner.
From factory, the internal temperature
sensor is used for feedback.
Heat energy monitor
Di. temperature
Is automatically activated if an external
temperature sensor is installed.
This function can be used in the following control modes:
Controller settings (Kp and Ti)
From factory, the analog input function is tailored to a generic heating
system with a predened pipe length and sensor position in the system.
We recommend to use the wizard under “Assist" ”Setup, analog input”
if these predened settings are not applicable.
These operating modes are designed for the
connection of an external sensor:
Monitor the resulting setpoint under ”Status” ”Pump
performance”.
3
5
SETTINGS
The most commonly used
control mode for external
setpoint function.
5
Min.
Max.
V
1020
H
Signal input
Resulting setpoint
”Linear with min.” and ”Linear with stop”
The input signal range is between 0 and 100 % and is inuenced linearly. In ”Linear with stop”,
the pump stops if the input signal is below 10 %. If the input signal increases above 15 %, the
pump starts operating again. In ”Linear with min.”, the pump runs on the minimum curve
when the signal input is below 20 %.
The pump’s resulting setpoint will be a combination of two factors:
• The locally given setpoint, which is 100 % reference to the signal input.
• The external signal input (0-10 V or 4-20 mA).

MMMMM
T
T
M
»Boiler pump
»Shunt/buer
»’Primary only’ system
»Hot water»Hot water
»Charging pump
»Recirculation
»Recirculation
»Fan coil unit »Radiator two-pipe
system »Radiator one-pipe system »Underoor/ceiling
»Air handling unit
Assist
The application wizard in the Assist menu helps
you set the correct control mode.
Firstly, identify your pump in the application
overview below. Secondly, in the pump’s display,
choose the system that applies to the position of
your pump.
Example: Boiler pump
Choose “Boiler pump” in the application wizard
and press “OK”. Then select either “’Primary only’
system” or “Shunt/buer” depending on the posi-
tion of the pump. Press “OK”. Keep choosing the
characteristics corresponding to your system until
the setup is complete.
4
Application wizard
Heating and hot water systems
4

T
Assist
»Ground source
The application wizard in the Assist menu helps
you set the correct control mode.
Example: Ground source
Firstly, identify your pump in the application
overview to the left. Secondly, choose “Ground
source” in the application wizard and press “OK”.
Then select either “Ground loop” or ”Distribution
side” depending on the position of the pump.
Press “OK”. Keep choosing the characteristics
corresponding to your system until the setup is
complete.
Tip!
By using the pump’s internal sensor and installing
another temperature sensor on the return pipe,
you are able to measure the dierence between
the inlet and outlet temperatures; the Delta-T (ΔT).
Knowing Delta-T is especially useful in ground
source applications, as the pump performance can
be regulated to ensure a specic Delta-T value.
4
Ground source heat pump system
Application wizard
»Charging pump »Distribution side
»Ground loop
4

MM
M
T
T
Cooling tower
Cooling source
»Fan coil unit
»Air handling unit
»Underoor/ceiling
»Primary/secondary system
»Primary pump
»Primary pump
»Secondary pump
»’Primary only’ system
Assist
The application wizard in the Assist menu
helps you set the correct control mode.
Firstly, identify your pump in the application
overview below. Secondly, in the pump’s
display, choose the system that applies to the
position of your pump.
See examples on the previous pages.
4
Application wizard
Cooling systems
»Chiller pump
4

ASSIST
5
One pump is operating continuously.
The backup pump is operated at
intervals to prevent seizing up.
If the duty pump stops due to
a fault, the backup pump
will start automatically.
Congure on the master pump.
From model D: A sensor can also be installed on
the slave, but as long as the master is powered
up, the input on the slave will be ignored. If the
master loses power, the input of the slave will
take over.
* As a general rule, pumps older than model C must have a CIM mounted in both the
slave and master pump. However, pumps from model C supports newer versions of
CIMs, making it possible only to mount the CIM on the master pump. See installation
and operating instructions for MAGNA3 model D for a list of supported CIM versions.
Congure on both
master and slave pump.
Check the display to identify
the master pump.
Check the nameplate
or display to identify
the master pump. All pumps in operation will run at equal speed
and will cut in and out depending on system
load. Cascade operation can be used in constant
curve and constant pressure control modes.
Pumps will run as
single pumps.
Only one pump is operating at a time.
The change from one pump to the other
depends on time or energy. If one pump fails,
the other pump will take over automatically.
Multipump modes
How to congure input and output
How to identify the master pump Alternating
operation
Back-up
operation
Cascade
operation
No
multipump
function
Analog input
Digital input
Fieldbus
module (CIM)*
Relay output
=
=
=
=
Multipump setup
Multipump systems
Twin-head pump
Master
Master
Slave
5
Setpoint
5.00 bar
Operaring mode
Normal
Actual controlled value
4.90 bar
Control mode
Const. pressure
Status Settings Assist
Home
XXXXXXXXXXXXXXXXXXXXXXXX
P/N: XXXXXXXX
S/N: XXXXXXXX
PC: XXXX
Model: X
IPXXX TF XXX
GrundfosHolding A/S, DK - 8850 Bjerringbro, Denmark
EEI ≤ X.XX Part X
Madein Germany
Min.
Max.
X.XX
X.X
XXXX
XXXXX.XX
I1[A] P1[W] MPa
=
=
=
24 h
=
Setpoint
5.00 bar
Operaring mode
Normal
Actual controlled value
4.90 bar
Control mode
Const. pressure
Status Settings Assist
Home

When operating in multipump mode, the operating mode,
control mode and setpoint are active on a system level,
meaning that the settings are the same on both pumps.
Changing settings or reading out multipump parameters is
only done on one of the pumps.
However, Grundfos Eye and relays are local
and show the status of each individual
pump (e.g. running, stopped and warning).
The heat energy parameters (ow, volume and
heat energy) are accumulated on system level.
Both pumps will display the same values.
The temperature sensor must only be installed
on the master pump.
In applications where the twin-head pump is
autonomously controlled by a 3rd party controller,
it is recommended to dissolve the factory enabled
multipump function.
When dissolving the multipump function, the inputs
and output must be congured on both pump heads.
The pump from which the multipump system is congured is
automatically assigned as master. In twin-head pumps, where
the multipump function is enabled from factory, the master is
identied on the nameplate. See ”How to identify the master
pump” in ”4. Multipump setup”.?
To change master, dissolve the multipump function via the Assist
menu on the pump display and reinitialise from the pump you
wish to assign master.
Heat energy monitor
Autonomous twin-head pump control
Selection of master pump
Multipump function
Operation
5