Grundfos MAGNA 32-60 User manual

GRUNDFOS INSTRUCTIONS
MAGNA
Series 2000
MAGNA 32-60, 32-100
Installation and operating instructions
3191277
4002198
Conforms to ANSI/UL Std. 778
Certified to CAN/CSA Std. E60335-2-51

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English (US) Installation and operating instructions
CONTENTS Page 1. Limited warranty
Products manufactured by GRUNDFOS PUMPS
CORPORATION (Grundfos) are warranted to the
original user only to be free of defects in material and
workmanship for a period of 24 months from date of
installation, but not more than 30 months from date
of manufacture. Grundfos' liability under this
warranty shall be limited to repairing or replacing at
Grundfos' option, without charge, F.O.B. Grundfos'
factory or authorized service station, any product of
Grundfos' manufacture. Grundfos will not be liable
for any costs of removal, installation, transportation,
or any other charges which may arise in connection
with a warranty claim. Products which are sold but
not manufactured by Grundfos are subject to the
warranty provided by the manufacturer of said
products and not by Grundfos' warranty. Grundfos
will not be liable for damage or wear to products
caused by abnormal operating conditions, accident,
abuse, misuse, unauthorized alteration or repair, or if
the product was not installed in accordance with
Grundfos' printed installation and operating
nstructions.
To obtain service under this warranty, the defective
product must be returned to the distributor or dealer
of Grundfos' products from which it was purchased
together with proof of purchase and installation date,
failure date, and supporting installation data. Unless
otherwise provided, the distributor or dealer will
contact Grundfos or an authorized service station for
instructions. Any defective product to be returned to
Grundfos or a service station must be sent freight
prepaid; documentation supporting the warranty
claim and/or a Return Material Authorization must be
included if so instructed.
GRUNDFOS WILL NOT BE LIABLE FOR ANY
INCIDENTAL OR CONSEQUENTIAL DAMAGES,
LOSSES, OR EXPENSES ARISING FROM
INSTALLATION, USE, OR ANY OTHER CAUSES.
THERE ARE NO EXPRESS OR IMPLIED
WARRANTIES, INCLUDING MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE,
WHICH EXTEND BEYOND THOSE WARRANTIES
DESCRIBED OR REFERRED TO ABOVE.
Some jurisdictions do not allow the exclusion or
limitation of incidental or consequential damages
and some jurisdictions do not allow limit actions on
how long implied warranties may last. Therefore, the
above limitations or exclusions may not apply to you.
This warranty gives you specific legal rights and you
may also have other rights which vary from
jurisdiction to jurisdiction.
1. Limited warranty 2
2. Symbols used in this document 3
3. General description 3
4. Applications 3
4.1 Pumped liquids 3
5. Installation 4
5.1 Positioning 4
5.2 Changing the control box position 5
5.3 Insulation shells 5
5.4 Non-return valve 5
5.5 Frost protection 5
6. Electrical connection 6
6.1 Supply voltage 6
6.2 Connection to the supply 6
7. Start-up 6
8. Functions 6
8.1 Functions selected via the pump control panel 6
8.2 Functions selected via the R100 remote
control 6
8.3 Functions selected via expansion modules 7
8.4 Control modes 7
8.5 Selection of control mode 8
8.6 Automatic nighttime duty 8
8.7 Constant-curve duty 9
8.8 Max. or min. curve duty 9
8.9 Temperature influence 9
8.10 Expansion modules 10
8.11 Connection to LON network 10
9. Pump setup 10
9.1 Factory setting 10
9.2 Control panel 11
9.3 R100 remote control 12
9.4 R100 display overview 13
9.5 Menu OPERATION 14
9.6 Menu STATUS 14
9.7 Menu INSTALLATION 15
9.8 Priority of settings 16
10. Troubleshooting 17
10.1 Checking the module 18
11. Megging 19
12. Technical data 20
13. Disposal 20
Warning
Prior to installation, read these installa-
tion and operating instructions. Instal-
lation and operation must comply with
local regulations and accepted codes
of good practice.
This booklet should be left with the
owner of the pump for future reference
and information regarding its opera-
tion.

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2. Symbols used in this document
3. General description
The GRUNDFOS MAGNA Series 2000 is a circulator
pump with integrated differential pressure control
enabling adjustment of pump performance to the
actual system requirements. In many systems, this
will reduce the power consumption considerably,
reduce noise from thermostatic valves and similar
fittings, and improve the control of the system.
The desired head can be set on the pump control
panel.
Fig. 1 Grundfos MAGNA Series 2000 circulator
pump
4. Applications
The GRUNDFOS MAGNA is designed for circulating
liquids in heating and air-conditioning systems.
The pump range is primarily used in
• systems with a variable flow.
The pump range can also be used in
• systems with a constant flow where it is
desirable to optimize the setting of the pump duty
point
• systems with variable flow-pipe temperature.
4.1 Pumped liquids
Grundfos MAGNA is intended for pumping clean
water not containing solid particles or fibers.
Warning
If these safety instructions are not
observed, it may result in personal
injury!
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If these safety instructions are not
observed, it may result in malfunc-
tion or damage to the equipment!
1RWH
Notes or instructions that make the
job easier and ensure safe
operation.
Warning
The use of this product requires
experience with and knowledge of
the product.
Persons with reduced physical,
sensory or mental capabilities must
not use this product, unless they
are under supervision or have been
instructed in the use of the product
by a person responsible for their
safety.
Children must not use or play with
this product.
TM04 9389 4010
Warning
The pump must not be used for the
transfer of flammable liquids such
as diesel oil, petrol or similar
liquids.

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5. Installation
Arrows on the pump housing indicate the liquid flow
direction through the pump.
5.1 Positioning
GRUNDFOS MAGNA must be installed with the
pump head in horizontal position; see fig. 2.
Fig. 2 Installation positions

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5.2 Changing the control box position
Procedure:
5.2.1 Control box position
For permissible control box positions, see the Quick
Guide.
5.3 Insulation shells
Insulation shells for pumps in heating systems are
supplied with the pump.
For cold water applications, a silicone RTV sealant
must be liberally applied to the area shown in fig. 3
to prevent condensation between the shell and pump
housing. Follow the sealant manufacturers
instructions for safety and proper usage.
The fitting of insulation shells will increase the pump
dimensions.
Fig. 3 Shaded area indicates silicone RTV
sealant
5.4 Non-return valve
If a non-return valve is fitted in the pipe system, see
fig. 4; ensure that the set minimum discharge
pressure of the pump is always higher than the
closing pressure of the valve. This is especially
important in proportional-pressure control mode
(reduced head at low flow).
Fig. 4 Non-return valve
5.5 Frost protection
If the pump is not used during periods of frost,
necessary steps must be taken to prevent bursting
pipes.
Warning
Before any dismantling of the
pump, the system must be drained
or the isolating valves on both sides
of the pump must be closed as the
pumped liquid may be scalding hot
and under high pressure.
Step Action Illustration
1Remove the two
screws.
TM03 0474 5204
2
Pull the stator
and the pump
head approx.
0.22 inches
(5 mm) out.
TM03 0475 5204
3
Turn the stator
and the pump
head to the
desired position.
TM03 0476 5204
4Push the stator and the pump
head into place.
TM03 0475 5204
5Refit the two screws
(16 + 5 Nm).
TM03 0580 0305
11RWH
It is recommended to fit insulation
shells to the pump.
TM04 9313 3910TM02 0640 0301
11RWH
Additives with a density and/or kin-
ematic viscosity higher than
those/that of water will reduce the
hydraulic performance.

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6. Electrical connection
The electrical connection and protection must be
carried out in accordance with local regulations.
• The pump requires no external motor protection.
• Check that the supply voltage and frequency cor-
respond to the values stated on the pump name-
plate.
6.1 Supply voltage
1 x 208 - 230 V +/- 10 %, 50/60 Hz.
6.2 Connection to the supply
7. Start-up
Do not start the pump until the system has been
filled with liquid and vented. Furthermore, the
required minimum inlet pressure must be available at
the pump inlet, see section 12. Technical data.
The system cannot be vented through the pump.
8. Functions
Most functions can be selected via the pump control
panel. However, some functions can only be
selected with the R100 or via expansion modules.
8.1 Functions selected via the pump
control panel
The following functions are selected via the pump
control panel; see fig. 11.
•AUTOADAPT (factory setting)
Recommended for most heating installations.
During operation, the pump automatically makes
the necessary adjustment to the actual system
characteristic. This setting ensures minimum
energy consumption and noise level which
reduces operating costs and increases comfort.
•Proportional-pressure control
The pump head is changed continuously in
accordance with the water demand in the system.
The desired setpoint can be set on the pump
control panel.
•Constant-pressure control
A constant head is maintained, regardless of
water demand. The desired setpoint can be set
on the pump control panel.
Automatic night-time duty
The pump changes automatically between normal
duty and night-time duty depending on the
flow-pipe temperature. Automatic nighttime duty can
be combined with the above-mentioned control
modes.
8.2 Functions selected via the R100 remote
control
Additional functions can be selected via the R100
remote control:
•Constant-curve duty
The pump runs at a constant speed, on or
between the max. and min. curves.
•Temperature influence
The pump head varies depending on the liquid
temperature.
Warning
Risk of electric shock —
This pump is supplied with a
grounding conductor and
grounding-type attachment plug.
To reduce the risk of electric shock,
be certain that it is connected only
to a properly grounded, ground-
ing-type receptacle.
Warning
The pump must be connected to an
external disconnect switch.
Grounding can be used for
protection against indirect contact.
Megging must be carried out as
described in section 11. Megging.
Warning
If the pump is connected to an elec-
tric installation where a Ground
Fault Circuit Interrupt (GFCI) is
used as additional protection, this
circuit breaker must trip out when
ground fault currents with DC con-
tent (pulsating DC) occur.
TM03 0520 0105

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8.3 Functions selected via expansion
modules
Further functions are available via the GENI module
or the relay module:
8.3.1 GENI module
•External analog control of head or speed via a
signal from an external 0-10 V signal transmitter.
•External forced control via inputs for:
- Max. curve
- Min. curve.
•Bus communication via GENIbus
The pump can be controlled and monitored by a
Grundfos Control MPC Series 2000, a building
management system or another type of external
control system.
•External start/stop
The pump can be started and stopped via the =
digital input.
•Fault, ready and operating indication via signal
relay
The pump controls an external fault, ready and
operating signal relay via a potential-free output.
The function of the signal relay is set with the
R100.
8.3.2 Relay module
•External start/stop
The pump can be started and stopped via the
digital input.
•Fault, ready and operating indication via
signal relay
The pump controls an external fault, ready and
operating signal relay via a potential-free output.
The function of the signal relay is set with the
R100.
8.4 Control modes
A GRUNDFOS MAGNA pump can be set to the
control mode which is most suitable for the individual
system.
Possible control modes:
•AUTO
ADAPT (factory setting)
• Proportional pressure
• Constant pressure.
Each of the control modes can be combined with
automatic night-time duty, see section 8.6 Automatic
nighttime duty.
AUTOADAPT
To be set on the control panel or with the R100, see
section 9. Pump setup.
The control mode AUTOADAPT continuously adapts
the pump performance.
The setpoint of the pump has been factory-set as
follows and cannot be changed manually:
• MAGNA 32-60 to 12 ft (3.6 m)
• MAGNA 32-100 to 18 ft (5.5 m).
When the pump registers a lower pressure on the
max. curve, A2, the AUTOADAPT function automati-
cally selects a correspondingly lower control curve,
Hset2, thus reducing the energy consumption.
Fig. 5 AUTOADAPT
A1: Original duty point.
A2: Lower registered pressure on the max.
curve.
A3: New duty point after AUTOADAPT control.
Hset1: Original setpoint.
Hset2: New setpoint after AUTOADAPT control.
Hfac.: Factory-set setpoint.
The AUTOADAPT function can be reset by pressing
the button for approx. 10 seconds until the control
mode is back to the starting point (AUTOADAPT or
AUTOADAPT with automatic
nighttime duty).
Proportional-pressure control
To be set on the control panel or with the R100, see
section 9. Pump setup.
The pump head is reduced at decreasing water
demand and increased at rising water demand; see
fig. 6.
Constant-pressure control
To be set on the control panel or with the R100, see
section 9. Pump setup.
The pump maintains a constant pressure, regardless
of water demand; see fig. 6.
Fig. 6 Pressure control
TM02 0251 4800
TM00 5546 4596
Hmax.
Hfac. A1
A3A2Hset2
Hset1
Hset
Hset
Hset
Proportional
pressure Constant pressure

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8.5 Selection of control mode
8.5.1 Setpoint setting
The setpoint can be set by pressing or when
the pump is in control mode:
• proportional pressure,
• constant pressure or
• constant-curve duty.
Set the setpoint so that it matches the system.
A too high setting may result in noise in the system
whereas a too low setting may result in insufficient
heating or cooling in the system.
If AUTOADAPT is selected, the setpoint cannot be set.
8.6 Automatic nighttime duty
To be set on the control panel or with the R100, see
section 9. Pump setup.
Once automatic nighttime duty has been activated,
the pump automatically changes between normal
duty and night-time duty (duty at low performance).
Changeover between normal duty and nighttime duty
is dependent on the flow-pipe temperature.
The pump automatically changes over to
nighttime duty when the built-in sensor registers a
flow-pipe temperature drop of more than
18 °F - 27 °F (10 °C - 15 °C) within approx. 2 hours.
The temperature drop must be at least 0.18 °F/min
(0.1 °C/min).
Changeover to normal duty takes place without a
time lag when the temperature has increased by
approx. 18 °F (10 °C).
System type Description Select this
control mode
Typicalheating
systems
Grundfos recommends to let the pump remain in AUTOADAPT mode.
This ensures optimum performance at the lowest possible energy
consumption. AUTOADAPT
Relativelygreat
head losses in
the distribution
pipes and
air-condition-
ing systems
1. Two-pipe
heating
systems with
thermostatic
valves and:
• with a pump head higher than
10 ft (3 m),
Proportional
pressure
• very long distribution pipes,
• strongly throttled pipe balancing valves,
• differential pressure regulators,
• great head losses in those parts of the system
through which the total quantity of water flows
(e.g. boiler, heat exchanger and distribution pipe
up to the first branching).
2. Primary circuit pumps in systems with great head losses in the pri-
mary circuit.
3. Air-condition-
ing systems
with
• heat exchangers (fan coils),
• cooling ceilings,
• cooling surfaces.
Relativelysmall
head losses in
the distribution
pipes
1. Two-pipe
heating sys-
tems with
thermostatic
valves and:
• with a pump head lower than
6.5 ft (2 m),
Constant
pressure
• with small head losses in those parts of the sys-
tem through which the total quantity of water flows
(e.g. boiler, heat exchanger and distribution pipe
up to the first branching) or
• modified to a high differential temperature
between flow pipe and return pipe (e.g. district
heating).
2. Underfloor heating systems with thermostatic valves.
3. One-pipe heating systems with thermostatic valves or pipe balanc-
ing valves.
4. Primary circuit pumps in systems with small head losses in the pri-
mary circuit.
1RWH
Automatic nighttime duty cannot be
used in air-conditioning systems.

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8.7 Constant-curve duty
To be set with the R100, see section 9. Pump setup.
The pump can be set to operate according to a
constant curve, like an uncontrolled pump, see fig. 8.
When the pump has been set to constant-curve
mode with the R100, the setting can be changed on
the control panel or with the R100.
MAGNA 32-60, 32-100
Select one of 9 curves (81 curves with the R100)
between the max. and min. curves, see fig. 7.
Fig. 7 Operating curves
8.8 Max. or min. curve duty
To be set on the control panel, with the R100 or via
GENI module, see section 9. Pump setup.
The pump can be set to operate according to the
max. or min. curve, like an uncontrolled pump, see
fig. 8.
This operating mode is available, regardless of the
control mode.
Fig. 8 Max. and min. curves
The max. curve mode can be selected if an uncon-
trolled pump is required.
The min. curve mode can be used in periods in
which a minimum flow is required. This operating
mode is for instance suitable for manual
nighttime duty if automatic night-time duty is not
desired.
8.9 Temperature influence
To be set with the R100, see section 9. Pump setup.
When this function is activated in proportional- or
constant-pressure control mode, the setpoint for
head will be reduced according to the liquid
temperature.
It is possible to set temperature influence to function
at liquid temperatures below 176 °F (80 °C) or below
122 °F (50 °C). These temperature limits are called
Tmax.. The setpoint is reduced in relation to the head
set (= 100 %) according to the characteristics below.
Fig. 9 Temperature influence
In the above example, Tmax. = 176 °F (80 °C) has
been selected. The actual liquid temperature Tactual
causes the setpoint for head to be reduced from
100 % to Hactual.
The temperature influence function requires:
• Proportional- or constant-pressure control mode.
• The pump must be installed in the flow pipe.
• System with flow-pipe temperature control.
Temperature influence is suitable in:
• systems with variable flows (e.g. two-pipe heating
systems), in which the activation of the
temperature influence function will ensure a
further reduction of the pump performance in
periods with small heating demands and
consequently a reduced flow-pipe temperature.
• systems with almost constant flows (e.g.
one-pipe heating systems and underfloor heating
systems), in which variable heating demands
cannot be registered as changes in the head as is
the case with two-pipe heating systems. In such
systems, the pump performance can only be
adjusted by activating the temperature influence
function.
Selection of Tmax.
In systems with a flow-pipe temperature of:
• up to and including 131 °F (55 °C),
select Tmax. = 122 °F (50 °C),
• above 131 °F (55 °C),
select Tmax. = 176 °F (80 °C).
TM03 0551 0205TM00 5547 4596
Max.
Min.
Max.
Min.
TM01 0626
11RWH
The temperature influence function
cannot be used in air-conditioning
systems.
Hactual
Tactual

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8.10 Expansion modules
The pump can be fitted with an expansion module
enabling communication with external signals
(signal transmitters).
Two types of expansion modules are available:
• Relay module
• GENI module.
8.10.1 Relay module
For mounting and operation, see relay module
installation and operating instructions.
Functions
• External start/stop
• Fault, ready and operating indication via signal
relay.
8.10.2 GENI module
For mounting and operation, see GENI module
installation and operating instructions.
Functions
• External start/stop
• External forced control
• External analog 0-10 V control
• Bus communication via GENIbus
• Duty standby alternating mode
• Fault, ready and operating indication via signal
relay.
8.11 Connection to LON network
The pump can be connected to a LON network via a
GENI module and an external Grundfos G10 LON
interface. Product number: 605726.
Fig. 10 Connection to LON network
9. Pump setup
For the setting of the pump, use:
• control panel.
• R100 remote control.
• bus communication (not described in detail in
these instructions, contact Grundfos).
The table shows the application of the individual
operating units and in which section the function has
been described.
"–" = not available with this operating unit.
9.1 Factory setting
The pump is factory-set to AUTOADAPT without
automatic nighttime duty.
TM03 0378 5004
LON network
24 VAC/VDC
GENI module
Possible settings
Control panel R100
AUTOADAPT 9.2.1 9.7.1
Automatic nighttime duty 9.2.1 9.7.2
Proportional-pressure
control 9.2.1 9.7.1
Constant-pressure con-
trol 9.2.1 9.7.1
Setpoint setting 9.2.2 9.5.1
Max. curve duty 9.2.3 9.5.2
Min. curve duty 9.2.4 9.5.2
Constant-curve duty – 9.5.2
Temperature influence – 9.7.3
Activation/deactivation of
pump buttons – 9.7.4
Allocation of pump num-
ber – 9.7.6
Start/stop 9.2.5 9.5.2
Resetting of fault indi-
cations 9.2.6 9.5.3
Reading of various data –9.6.1 -
9.6.7

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9.2 Control panel
The control panel, fig. 11, incorporates:
For further information, see section
10. Troubleshooting.
Fig. 11 Control panel
9.2.1 Control mode setting
Description of function, see section 8.4 Control
modes.
To change the control mode, press , pos. 3,
according to this cycle:
Fig. 12 Cycle of control modes
Automatic nighttime duty can be activated together
with each of the control modes.
The light symbols in pos. 4 of fig. 11, indicate the
pump settings:
"–" = no light.
Warning
At high liquid temperatures, the
pump may be so hot that only the
buttons should be touched to avoid
burns.
Pos. Description
1 Buttons for setting
2
• Indicator lights for operating and
fault indication and
• symbol for indication of external con-
trol
3 Button for change of control mode
4Light symbols for indication of control
mode and night-time duty
5Light fields for indication of head, flow
and operating mode
TM03 8752 2407
TM03 1288 1505
Light in Control mode Automatic nighttime
duty
AUTOADAPT AUTOADAPT NO
Proportional
pressure NO
Constant
pressure NO
–Constant curve NO
AUTO
ADAPT AUTOADAPT YES
Proportional
pressure YES
Constant
pressure YES
–Constant curve YES

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9.2.2 Setpoint setting
Set the setpoint of the pump by pressing or
when the pump has been set to proportional-
pressure control, constant-pressure control or
constant-curve duty.
The light fields, pos. 5, on the control panel indicate
the setpoint set.
MAGNA 32-60, 32-100
The light fields can indicate a maximum setpoint of
29.5 ft (9 m).
Fig. 13 Light fields MAGNA xx-100
9.2.3 Setting to max. curve duty
Description of function, see section 8.8 Max. or min.
curve duty.
To change over to the max. curve, press
continuously until "MAX" illuminates, see fig. 14. To
change back, press continuously until the desired
setpoint is indicated.
Fig. 14 Max. curve
9.2.4 Setting to min. curve duty
Description of function, see section 8.8 Max. or min.
curve duty.
To change over to the min. curve, press
continuously until "MIN" illuminates, see fig. 15. To
change back, press continuously until the desired
setpoint is indicated.
Fig. 15 Min. curve
9.2.5 Start/stop of pump
To stop the pump, press continuously until
"STOP" illuminates. When the pump is stopped, the
green indicator light will be flashing.
To start the pump, press continuously.
9.2.6 Resetting of fault indications
The fault indications are reset by briefly pressing any
button. The settings remain unchanged. If the fault
has not disappeared, the fault indication will
reappear within 4.5 minutes.
9.3 R100 remote control
The pump is designed for wireless communication
with the Grundfos R100 remote control. The R100
communicates with the pump via infrared light.
During communication, the R100 must be pointed at
the pump control panel. When the R100 is
communicating with the pump, the red indicator light
will flash rapidly.
The R100 offers additional possibilities of setting and
status displays for the pump.
TM03 0380 2507
TM03 0381 2507
TM03 0382 2507
11RWH
If the pump is to be stopped, it is
recommended to use the start/stop
input, the R100 or to switch off the
electricity supply. In this way, the
setpoint will remain unchanged
when the pump is started again.

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9.4 R100 display overview
The R100 displays are divided into four parallel
menus, see fig. 16:
0. GENERAL, see operating instructions for R100
1. OPERATION
2. STATUS
3. INSTALLATION
The number stated at each individual display in
fig. 16 refers to the section in which the display is
described.
Fig. 16 Menu overview
9.5.3
9.6.2
9.6.3
9.6.4
9.6.5 9.7.5
9.7.4
9.7.3
9.6.6
9.6.7
9.5.2
9.7.1
9.6.1
9.5.1
9.5.4
9.7.2
9.7.6
This display appears only once, i.e. when the
R100 gets contact with the pump.
3. INSTALLATION
2. STATUS
0. GENERAL 1. OPERATION

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9.5 Menu OPERATION
When the communication between the R100 and the
pump has been established, "Contact with" appears
in the display. When the "arrow down" on the R100 is
pressed, menu OPERATION appears.
9.5.1 Setpoint
This display depends on the control mode selected
in the display "Control mode" in menu
INSTALLATION.
If the pump is forced-controlled via external signals,
the number of possible settings will be reduced, see
section 9.8 Priority of settings. Attempts to change
the settings will result in an indication in the display
saying that the pump is forced-controlled and
changes therefore cannot be made.
This display will appear when the pump is in
AUTOADAPT mode.
Set the desired setpoint by pressing the buttons "+"
and "–" on the R100 (not possible when the pump is
in AUTOADAPT mode).
Furthermore, it is possible to select one of these
operating modes:
• Stop
•Min. (min. curve)
•Max. (max. curve).
The display is different if proportional pressure, con-
stant pressure or constant curve has been selected.
The actual duty point of the pump is indicated by a
square in the Q/H field. No indication at low flow.
9.5.2 Operating mode
Select an operating mode:
• Stop
•Min. (min. curve)
•Normal (AUTOADAPT , proportional pressure,
constant pressure or constant curve)
•Max. (max. curve).
9.5.3 Fault indications
If the pump is in alarm status, the cause will appear
in this display.
Possible causes:
• Pump blocked
• Internal fault
•Overvoltage
• Undervoltage
• Overtemperature
• Module fault
• Fault in module communication.
The fault indication can be reset in this display.
If the fault has not disappeared when resetting is
attempted, the fault indication will reappear in the
display when communicating with the pump.
9.5.4 Alarm log
The alarm code with text appears in this display. The
display also shows the number of minutes the pump
has been connected to the electricity supply after the
fault occurred.
The last five fault indications will appear in the alarm
log.
9.6 Menu STATUS
The displays appearing in this menu are status
displays only. It is not possible to change or set
values.
The actual values in the display are indicative and
based on estimation.
9.6.1 Actual setpoint
Field "Actual setpoint":
Actual setpoint of pump.
Field "corresponding to":
Actual setpoint in % of the setpoint set if the pump is
connected to an external analog 0-10 V signal
transmitter or if temperature influence or
proportional-pressure control is activated.
1RWH
The display "Contact with" appears
only once, i.e. when the R100 gets
contact with the pump.

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9.6.2 Operating mode
This display shows the actual operating mode (Stop,
Min., Normal or Max.)and where it was selected
(Pump, R100, BUS or External).
9.6.3 Head and flow
The actual head and flow of the pump.
If "<" is indicated in front of the flow, the flow is less
than the displayed value.
If the pump is unable to determine head and flow,
this is indicated by "–".
9.6.4 Speed
The actual pump speed.
9.6.5 Liquid temperature
The actual temperature of the pumped liquid.
9.6.6 Power input and power consumption
Actual power input and power consumption of the
pump.
The value of power consumption is an accumulated
value and cannot be set to zero.
9.6.7 Operating hours
Operating hours of the pump.
The value of operating hours is an accumulated
value and cannot be set to zero.
9.7 Menu INSTALLATION
This menu shows the settings that should be
considered when installing the pump.
9.7.1 Control mode
Description of function, see section 8.4 Control
modes or 8.7 Constant-curve duty.
Select one of the control modes:
•AUTO
ADAPT
•Prop. pressure (proportional pressure)
•Const. pressure (constant pressure)
•Const. curve (constant curve).
Setting of setpoint and curve is carried out in display
9.5.1 Setpoint in menu OPERATION (not possible
when the pump is in AUTOADAPT mode).
9.7.2 Automatic night-time duty
In this display, automatic night-time duty can be acti-
vated or deactivated.
Automatic night-time duty can be set to:
•Active
• Not active,
irrespective of the control mode selected.
9.7.3 Temperature influence
Description of function, see section 8.9 Temperature
influence.

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The temperature influence function can be activated
in this display when the control mode is proportional
pressure or constant pressure; see section
9.7.1 Control mode.
In the case of temperature influence, the pump must
be installed in the flow pipe. It is possible to choose
between maximum temperatures of
122 °F (50 °C) and 176 °F (80 °C).
When the temperature influence is active, a small
thermometer is shown in the display "Setpoint" in
menu OPERATION, see section 9.5.1 Setpoint.
9.7.4 Buttons on pump
To prevent unauthorized persons from operating the
pump, the function of the buttons , and can
be deactivated in this display. The buttons can be
reactivated only with the R100.
The buttons can be set to:
•Active
• Not active.
9.7.5 Signal relay
If an expansion module has been fitted, the signal
relay function can be set in this display.
•Fault (functions as a fault signal relay)
•Ready (functions as a ready signal relay)
•Operation (functions as an operating signal
relay).
9.7.6 Pump number
A number from 1 up to and including 64 can be
allocated to a pump or can be changed so that the
R100, Grundfos Control MPC Series 2000 or other
systems can distinguish between two or more
pumps.
9.8 Priority of settings
The external forced-control signals will influence the
settings available on the pump control panel and with
the R100. However, the pump can always be set to
max. curve duty or to stop on the pump control panel
or with the R100.
If two or more functions are activated at the same
time, the pump will operate according to the setting
with the highest priority.
The priority of the settings is as shown in the table.
Example: If the pump has been forced to stop via an
external signal, the pump control panel or the R100
can only set the pump to max. curve.
With expansion module
As illustrated in the table, the pump does not react to
external signals (max. curve and min. curve) when
the pump is controlled via bus.
If the pump is to react to external signals (max. curve
and min. curve), the system must be configured for
that function.
For further details, please contact Grundfos.
1RWH
If the pump is in control mode
AUTOADAPT or constant curve, the
temperature influence cannot be set
with the R100.
Priority
Possible settings
Pump
control
panel
or R100
External
signals Bus signal
1Stop
2 Max.curve
3Stop
Stop
4Max.curve Max.curve
5Min. curve Min. curve Min. curve
6Setpoint
setting Setpoint setting
Not active when the pump is con-
trolled via bus.
Only active when the pump is con-
trolled via bus.

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10. Troubleshooting
Warning
The pumped liquid may be scalding hot and under high pressure. Before any removal
or dismantling of the pump, the system must therefore be drained or the isolating
valves on either side of the pump must be closed.
Indicator light is off.
Indicator light is on.
Indicator light is flashing.
Indicator
lights Fault Cause Remedy
Green Red
The pump is
not running.
One fuse in the installation is
blown/tripped out.
Replace the fuse.
Check that the electricity supply
falls within the specified range.
The current-operated or volt-
age-operated circuit breaker has
tripped out.
Reset circuit breaker to ON
position.
Check that the electricity supply
falls within the specified range.
The pump may be defective. Replace the pump or call Grund-
fos Service for assistance.
The pump is
not running.
The pump has been stopped in
one of the following ways:
1. With the button .
2. With the R100.
3. External on/off switch in posi-
tion off.
4. Via bus signal.
1. Start the pump by pressing .
2. Start the pump with the R100
or by pressing .
3. Switch on the on/off switch.
4. Start the pump via bus signal.
The pump
has stopped
due to a fault.
Electricity supply failure. Check that the electricity supply
falls within the specified range.
Pump blocked and/or impurities
in the pump. Dismantle and clean the pump.
The pump may be defective.
Use the R100 for fault finding,
see section 9.5.3 Fault indica-
tions.
Replace the pump or call Grund-
fos Service for assistance.
The pump is
running but
has a fault.
The pump has a fault, but is able
to operate.
Try to reset the fault indication by
briefly switching off the electricity
supply or by pressing the button
, or .
Use the R100 for fault finding,
see section 9.5.3 Fault indica-
tions.
In case of repeated faults,
contact Grundfos Service.
The pump
has been set
to stop and
has a fault.
The pump has a fault, but is able
to operate (has been set to
STOP).

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10.1 Checking the module
Noise in the
system.
Air in the system. Vent the system.
The flow is too high. Reduce the setpoint and possibly change over to AUTOADAPT or
constant pressure.
The pressure is too high. Reduce the setpoint and possibly change over to AUTOADAPT or
proportional pressure.
Noise in the
pump.
The inlet pressure is too low. Increase the inlet pressure and/or check air volume in the expan-
sion tank (if installed).
Air in the pump.
Set the pump to "MAX" by contin-
uously pressing the button or
with the R100. After venting, set
the pump back to normal duty by
pressing the buttons , or
with the R100.
Note: The pump must not run
dry.
Indicator
lights Fault Cause Remedy
Green Red
11RWH
The R100 can also be used for fault finding.
Illustration Action
TM03 0892 0705
1. Remove the module cover.
2. Check the LEDs.
When the pump is switched on and the
module is correctly mounted, the left LED
must be flashing and the right LED must
be permanently on.
3. Refit the module cover.
Flashing Permanently on

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11. Megging Megging of an installation incorporating a
GRUNDFOS MAGNA pump is not allowed, as the
built-in electronics may be damaged. If megging of
the pump is necessary, the pump should be
electrically separated from the installation.
Procedure:
Warning
Before removing the cables, the
electricity must be switched off.
Megging of the pump
Step Illustration Action
1
TM03 0908 0705
• Switch off the electricity supply.
• Open the connection box.
2
TM03 0909 0705
• Remove the supply wires L and N and the
earth ground wire (GND).
3
TM03 0910 0705
• Short-circuit the wires L and N using a
wire.
• Test between the wires L/N and earth
ground (GND).
Test voltage: Max. 1000 VAC/1500 VDC.
Maximum permissible leakage current < 35
mA.
Note: Never test between the supply wires
(L and N).
4
TM03 0911 0705
Test the cable to the pump.
• Pull the plug out of the pump and test
again.
• Refit the supply wires L and N and the
earth ground wire (GND).
• Switch on the electricity supply.
LN
GND
GND
L/N
GND
L/N

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12. Technical data
Supply voltage
1 x 208 - 230 V +/- 10 %, 50/60 Hz.
Motor protection
The pump requires no external motor protection.
Enclosure class
IP44.
Insulation class
F.
Relative air humidity
Maximum 95 %.
Ambient temperature
+32 °F (+0 °C) to +95 °F (+35 °C).
Temperature class
TF110 to EN 60335-2-51.
Liquid temperature
+35 °F (+2 °C) to +200 °F (+93 °C).
Maximum flow
• Max. 50 gpm.
Maximum system pressure
• Max. 145 psi.
Inlet pressure
Recommended inlet pressures:
• Min. 0.145 psi (0.10 bar) at 167 °F (+75 °C).
• Min. 5.08 psi (0.35 bar) at 200 °F (+93 °C).
Sound pressure level
The sound pressure level of the pump is lower than
32 dB(A).
Inputs and outputs of a pump with relay module
Inputs and outputs of a pump with GENI module
13. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Signal output
Internal potential-free
change-over contact.
Maximum load:
250 V, 2 A, AC1.
Minimum load: 5 V, 100 mA.
Screened cable depending
on signal level.
Input for exter-
nal start/stop
External potential-free
contact.
Contact load: 5 V, 10 mA.
Screened cable.
Loop resistance:
Maximum 130 :.
Inputs for max.
and min. curves
External potential-free
contact.
Contact load: 5 V, 1 mA.
Screened cable.
Loop resistance:
Maximum 130 :.
Input for analog
0-10 V signal
External signal: 0-10 VDC.
Maximum load: 1 mA.
Screened cable.
Bus input
Grundfos bus protocol,
GENIbus protocol, RS-485.
Screened cable.
Wire cross section:
0.25 - 1 mm2.
Cable length:
Maximum 3937 ft (1200 m).
Signal output
Internal potential-free
change-over contact.
Maximum load:
250 V, 2 A AC1.
Minimum load: 5 V, 100 mA.
Screened cable depending
on signal level.
Input for exter-
nal start/stop
External potential-free
contact.
Contact load: 5 V, 10 mA.
Screened cable.
Loop resistance:
Maximum 130 :.