Grundfos ALPHA SOLAR B User manual

ALPHA SOLAR
Model B
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

ALPHA SOLAR
English (GB)
Installation and operating instructions ..........................................................5
Български (BG)
Упътване за монтаж и експлоатация.........................................................24
Čeština (CZ)
Montážní a provozní návod .................................................................44
Deutsch (DE)
Montage- und Betriebsanleitung .............................................................63
Dansk (DK)
Monterings- og driftsinstruktion ..............................................................83
Eesti (EE)
Paigaldus- ja kasutusjuhend ...............................................................102
Español (ES)
Instrucciones de instalación y funcionamiento ..................................................121
Suomi (FI)
Asennus- ja käyttöohjeet ..................................................................141
Français (FR)
Notice d'installation et de fonctionnement .....................................................160
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας........................................................180
Hrvatski (HR)
Montažne i pogonske upute ................................................................200
Magyar (HU)
Telepítési és üzemeltetési utasítás...........................................................219
Italiano (IT)
Istruzioni di installazione e funzionamento .....................................................238
Lietuviškai (LT)
Įrengimo ir naudojimo instrukcija ............................................................258
Latviešu (LV)
Uzstādīšanas un ekspluatācijas instrukcija ....................................................277
Nederlands (NL)
Installatie- en bedieningsinstructies ..........................................................296
Polski (PL)
Instrukcja montażu i eksploatacji ............................................................316
Português (PT)
Instruções de instalação e funcionamento .....................................................336
Română (RO)
Instrucţiuni de instalare şi utilizare ...........................................................355
Srpski (RS)
Uputstvo za instalaciju i rad ................................................................374
Svenska (SE)
Monterings- och driftsinstruktion.............................................................393
Slovensko (SI)
Navodila za montažo in obratovanje .........................................................412
Slovenčina (SK)
Návod na montáž a prevádzku..............................................................431
Türkçe (TR)
3
Table of contents

Montaj ve kullanım kılavuzu ................................................................450
Українська (UA)
Інструкції з монтажу та експлуатації ........................................................470
Macedonian (MK)
Упатства за монтирање и ракување ........................................................490
Norsk (NO)
Installasjons- og driftsinstruksjoner ..........................................................510
Íslenska
Uppsetningar- og notkunarleiðbeiningar.......................................................529
4ALPHA SOLAR
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ........................5
1.1 Hazard statements..........................5
1.2 Notes ..................................5
2. Product introduction........................6
2.1 Product description .........................6
2.2 Pumped liquids ............................6
2.3 Identification..............................7
3. Receiving the product.......................7
3.1 Inspecting the product........................7
3.2 Scope of delivery...........................7
4. Installation requirements .....................7
5. Mechanical installation ......................8
5.1 Mounting the product ........................8
5.2 Pump positions ............................8
5.3 Control box positions ........................8
5.4 Insulation of the pump housing ..................9
6. Electrical connection ......................10
6.1 Control signal connection.....................10
6.2 Digital signal converter ......................10
7. Starting up the product .....................11
7.1 Before startup............................11
7.2 Starting up the pump .......................11
7.3 Venting the pump..........................11
8. Control functions .........................12
8.1 Operating panel for ALPHA SOLAR ..............12
8.2 Control modes ...........................12
8.3 Control signal ............................12
9. Setting of the product ......................14
9.1 Connection of the PWM input signal ..............14
9.2 Setting the signal connection ..................14
10. Service ...............................15
10.1 Dismantling the product......................15
10.2 Deblocking the shaft ........................15
11. Fault finding ............................16
12. Technical data ...........................17
12.1 Reduced supply voltage .....................17
13. Accessories ............................18
13.1 Unions and valve kits .......................18
13.2 Insulating shells ..........................18
13.3 Cables and plugs..........................19
14. Performance curves .......................20
14.1 Guide to performance curves ..................20
14.2 Curve conditions ..........................20
14.3 ALPHA SOLAR 15-75 130, 25-75 130, 25-75 180 (N) . ..21
14.4 ALPHA SOLAR 25-145 180 (N) .................22
15. Disposing of the product ....................23
1. General information
This appliance can be used by children aged from 8 years
and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction
concerning use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance. Cleaning and
user maintenance shall not be made by children without
supervision.
Read this document before you install the product.
Installation and operation must comply with local
regulations and accepted codes of good practice.
1.1 Hazard statements
The symbols and hazard statements below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
DANGER
Indicates a hazardous situation which, if not avoided, will
result in death or serious personal injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious personal injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate personal injury.
The hazard statements are structured in the following way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.2 Notes
The symbols and notes below may appear in Grundfos installation
and operating instructions, safety instructions and service
instructions.
Observe these instructions for explosion-proof products.
A blue or grey circle with a white graphical symbol
indicates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with a
black graphical symbol, indicates that an action must not
be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
5
English (GB)

2. Product introduction
2.1 Product description
The ALPHA SOLAR is designed to be integrated in all kinds of
thermal solar systems with either variable or constant flow rate.
High-efficiency ECM (Electronically Commutated Motor) pumps,
such as ALPHA SOLAR, must not be speed-controlled by an
external speed controller varying or pulsing the supply voltage. The
speed can be controlled by a low-voltage PWM (Pulse Width
Modulation) signal from a solar controller to optimise the solar
harvesting and temperature of the system. As a result, the power
consumption of the pump will be reduced considerably.
If no PWM signal is available, you can set ALPHA SOLAR to
operate at constant curve, only switched on and off by the
controller.
2.2 Pumped liquids
CAUTION
Flammable material
Minor or moderate personal injury
‐Do not use the pump for flammable liquids, such as
diesel oil and petrol.
CAUTION
Corrosive substance
Minor or moderate personal injury
‐Do not use the pump for aggressive liquids, such as
acids and seawater.
The product is suitable for the following:
• Clean, thin, non-aggressive and non-explosive liquids, not
containing solid particles or fibres.
• In heating systems, the water must meet the requirements of
accepted standards on water quality in heating systems, for
example the German standard VDI 2035.
• The pH must be between 8.2 and 9.5. The minimum value
depends on the water hardness and must not be below 7.4 at 4
°dH (0.712 mmol/l).
• The electrical conductivity at 25 °C must be ≥ 10 microS/cm.
• Mixtures of water with antifreeze media such as glycol with a
kinematic viscosity lower than 10 mm2/s (10 cSt). When
selecting a pump, the viscosity of the pumped liquid must be
taken into consideration. If the pump is used for a liquid with a
higher viscosity, the hydraulic performance of the pump is
reduced.
• Solar media as used in typical solar thermal systems
containing up to 50 vol. % of antifreeze media.
In domestic hot-water systems, the pump must be used only for
water with a degree of temporary hardness of less than 3 mmol/l
CaCO3 (16.8 °dH). To avoid lime problems in hard water, the liquid
temperature must not exceed 65 °C.
Related information
12. Technical data
6
English (GB)

2.3 Identification
2.3.1 Nameplate, ALPHA SOLAR
l1/1(A)
Grundfos Holding A/S
DK-8850 Bjerringbro
P1(W) MPa
Min.
Max. X.XX
X.XX XX
XXX X.X
EEI≤ 0.XX - Part X
XXXV ~ XX/XXHz IPXXX TFXXX
P/N:XXXXXXXX
S/N:XXXXXXXX
Made in XXXXXXX
PL.avg. <XXW
Denmark
2
3
4
5
6
8
7
9
10
23
22
21
20
19
18
17
16
14 1511 12 13
Min.XX°CModel:XXXXXX X GFNXX
PC:P1XXXX
1
TM0769471
Nameplate
Pos. Description
1 Pump name
2 Minimum current [A]
3 Maximum current [A]
4 CE mark and approvals
5 Energy Efficiency Index, EEI
6 Voltage [V]
7 Average power input PL, avg (Ecodesign regulation)
8 Model designation
9 Product number
10 Serial number
11 Country of origin
12 Frequency [Hz]
13 Part, according to EEI
14 Enclosure class
15 Manufacturer’s name and address
16
Production code:
• 1st and 2nd figures: production site code
• 3rd and 4th figures: year
• 5th and 6th figures: week
17 Minimum liquid temperature
18 Product mark (legal product code)
19 TF class
20 Crossed-out wheeled bin according to EN 50419
21 Maximum system pressure [MPa]
22 Maximum input power [W]
23 Minimum input power [W]
2.3.2 Type key, ALPHA SOLAR
Example: ALPHA SOLAR 15 - 75 130
Code Explanation
ALPHA SOLAR Pump type
15 Nominal diameter (DN) of inlet and outlet
ports [mm]
75 Maximum head [MPa]
-[ ]: Cast-iron pump housing
N: Stainless-steel pump housing
130 Port-to-port length [mm]
3. Receiving the product
3.1 Inspecting the product
CAUTION
Crushing of feet
Minor or moderate personal injury
‐Wear safety shoes when opening the box and handling
the product.
On receipt of the product, do the following:
1. Check that the product is as ordered.
If the product is not as ordered, contact the supplier.
2. Make sure that the supply voltage and frequency correspond to
the values stated on the product nameplate.
Related information
2.3.1 Nameplate, ALPHA SOLAR
3.2 Scope of delivery
The box contains the following items:
• ALPHA SOLAR pump
• Superseal power cable
• Mini superseal signal cable
• two gaskets
• quick guide.
4. Installation requirements
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product. Make sure that the power supply
cannot be switched on accidentally.
CAUTION
Crushing of feet
Minor or moderate personal injury
‐Wear safety shoes when opening the box and handling
the product.
Installation must be carried out by trained persons in
accordance with local regulations.
The pump must always be installed with a horizontal
motor shaft within ± 5°.
7
English (GB)

5. Mechanical installation
The mechanical installation must be carried out by trained
persons in accordance with local regulations.
5.1 Mounting the product
1. The arrows on the pump housing indicate the flow direction
through the pump.
TM076967
2. Fit the two gaskets supplied with the pump when you mount
the pump in the pipe. Install the pump with a horizontal motor
shaft.
TM068536
3. Tighten the fittings.
TM076952
Related information
5.3 Control box positions
5.2 Pump positions
Always install the pump with a horizontal motor shaft. Do not install
the pump with a vertical motor shaft.
• Pump installed correctly in a vertical pipe. See the image
below, top row left.
• Pump installed correctly in a horizontal pipe. See the image
below, top row right.
TM076953
Pump positions
5.3 Control box positions
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product. Make sure that the power supply
cannot be switched on accidentally.
CAUTION
Hot surface
Minor or moderate personal injury
‐The pump housing may be hot due to the pumped
liquid being scalding hot. Close the isolating valves on
both sides of the pump and wait for the pump housing
to cool down.
CAUTION
Pressurised system
Minor or moderate personal injury
‐Before dismantling the pump, drain the system or close
the isolating valves on both sides of the pump. The
pumped liquid may be scalding hot and under high
pressure.
Always install the pump with horizontal motor shaft. Position the
control box in position 9 o'clock. The drain hole must point
downwards after installation.
TM065636
Control box positions
You can turn the control box in steps of 90°.
Related information
5.1 Mounting the product
8
English (GB)

5.3.1 Changing the control box position
1. Make sure that the inlet and outlet valves are closed.
TM076959
2. Unscrew the screws on the pump head.
TM076960
3. Turn the pump head to the desired position.
TM076961
4. Refit the screws on the pump head.
TM076962
5.4 Insulation of the pump housing
TM076978
Insulating the pump housing
You can reduce the heat loss from the pump by insulating the pump
housing with insulating shells, which can be ordered as an
accessory.
Do not insulate the control box or cover the operating
panel.
Related information
13.2 Insulating shells
9
English (GB)

6. Electrical connection
DANGER
Electric shock
Death or serious personal injury
‐All electrical connections must be carried out by a
qualified electrician in accordance with local
regulations.
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product. Make sure that the power supply
cannot be switched on accidentally.
DANGER
Electric shock
Death or serious personal injury
‐Connect the pump to protective earth. Connect the
pump to an external main switch with a minimum
contact gap of 3 mm in all poles.
DANGER
Electric shock
Death or serious personal injury
‐In case of an insulation fault, the fault current may be a
pulsating DC. Observe national legislation about
requirements for and selection of Residual Current
Device (RCD) when installing the pump.
The pump is not a safety component and cannot be used
to ensure functional safety in the final appliance.
• The pump requires no external motor protection.
• Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
• Connect the pump to the power supply with the power cable.
TM065819
Control box connections
L
PE
N
IN
REF
OUT
TM069075
Superseal power connector
L
PE
N
IN
REF
OUT
TM069076
Mini superseal plug
6.1 Control signal connection
If you do not need the signal connection, cover it with a blanking
plug.
You can control the pump with a low-voltage PWM (pulse-width
modulation) signal.
The PWM signal is a method for generating an analog signal using
a digital source.
To enable the external control mode (PWM profile C), you need a
signal cable connected to an external system.
Conductor Colour
Signal input Brown
Signal reference Blue
Signal output Black
The cable length must not exceed 3 metres.
The cable must be connected to the control box via a mini
superseal plug.
TM064414
Mini superseal plug
6.2 Digital signal converter
To replace UPS SOLAR with a new ALPHA SOLAR pump which
fulfils the ErP requirements, we offer two solutions:
• Exchange the existing SOLAR controller to a controller suitable
for high-efficiency pumps.
• Keep the old controller, and use the phase control. Use a signal
converter, SIKON HE, which can convert the existing phase
control to a PWM signal for the ALPHA SOLAR.
When you use SIKON HE, you can replace the conventional 230 V
UPS SOLAR pump with a Grundfos ALPHA SOLAR pump without
having to change the controller. The function of the performance
control of the pump is maintained.
TM065809
Digital signal converter (SIKON HE)
For further information about the controller, see www.prozeda.de.
10
English (GB)

7. Starting up the product
7.1 Before startup
• The system must be filled with liquid and vented before starting
up the product.
• Make sure that the required minimum inlet pressure is available
at the pump inlet.
• When using the pump for the first time, the system must be
vented.
Related information
7.3 Venting the pump
12. Technical data
7.2 Starting up the pump
1. Open the inlet and outlet valves.
TM076963
2. Switch on the power supply.
TM076964
3. The lights in the operating panel indicate that the power supply
has been switched on and the pump is running.
TM076965
7.3 Venting the pump
TM077002
Venting the pump
Small air pockets trapped inside the pump may cause noise when
starting up the pump. However, because the pump is self-venting
through the system, the noise ceases over a period of time.
To speed up the venting process, do as follows:
1. Set the pump to speed III using the button on the operating
panel.
2. Let the pump run for minimum 30 minutes. How fast the pump
is vented depends on the system size and design.
When you have vented the pump, that is when the noise has
ceased, set the pump according to the recommendations.
The pump must not run dry.
The pump is from the factory set to constant curve 3.
11
English (GB)

8. Control functions
8.1 Operating panel for ALPHA SOLAR
TM077016
User interface with one button and five LEDs
On the operating panel there is one button and five LEDs which
show the following:
• Control mode
• Alarm status.
8.1.1 Alarm or warning
If the pump has detected one or more alarms or warnings, the first
LED switches from green to red. When the fault has been resolved
the operating panel switches back to operating status.
The LEDs indicate the actual operating status or alarm status. This
pump is either for internal control with constant-curve control or
external PWM-signal control with profile C.
Related information
11. Fault finding
8.2 Control modes
8.2.1 Constant curve or constant speed, I, II or III
At constant-curve operation, the pump runs at a constant curve.
The pump performance follows the selected performance curve, I, II
or III. See the figure below where curve II has been selected.
Q
H
TM068822
Constant-curve/-speed curve
The selection of the constant-curve setting depends on the
characteristics of the solar system in question.
8.3 Control signal
The pump can be controlled via a digital low-voltage pulse-width
modulation (PWM) signal.
The square-wave PWM signal is designed for a 100 to 4,000 Hz
frequency range. The PWM signal is used to select the speed
(speed command) and as feedback signal. The PWM frequency on
the feedback signal is fixed at 75 Hz in the pump.
Duty cycle
d % = 100 x t/T
Example Rating
T = 2 ms (500 Hz) UIH = 4-24 V
t = 0.6 ms UIL ≤ 1 V
d % = 100 x 0.6 / 2 = 30 % IIH ≤ 10 mA (depending on UIH)
Example
T
t
UIH
UIL
TM049911
PWM signal
Abbreviation Description
T Period of time [sec.]
d Duty cycle [t/T]
UIH High-level input voltage
UIL Low-level input voltage
IIH High-level input current
Related information
9.1 Connection of the PWM input signal
12
English (GB)

8.3.1 PWM interface
The PWM interface consists of an electronic part connecting the
external control signal to the pump. The interface translates the
external signal into a signal type that the microprocessor can
understand.
In addition, the interface ensures that the user cannot get into
contact with dangerous voltage if touching the signal wires when
power is connected to the pump.
470R
36V
100p
110R
BC847B
BC847B
TLP2704
TLP383
68k 2k7
+
-
1
2
3
4
TM060787
Schematic drawing, interface
Pos. Description
1 Galvanic isolation
2 PWM output
3 Signal reference (without connection to protective earth)
4 PWM input
8.3.2 PWM input signal profile C (solar)
At low PWM signal percentages (duty cycles), a hysteresis prevents
the pump from starting and stopping if the input signal fluctuates
around the shifting point. Without PWM signal percentages, the
pump will stop for safety reasons. If a signal is missing, for example
due to a cable breakage, the pump will stop to avoid overheating of
the solar thermal system.
Max.
10 20 30 40 50 60 70 80 90 100
TM051575
PWM input profile C (solar)
Axis Value
X PWM input signal [%]
Y Speed
PWM input signal
[%] Pump status
≤ 5 Standby mode: off
> 5 / ≤ 8 Hysteresis area: on/off
> 8 / ≤ 15 Minimum speed
> 15 / ≤ 90 Variable speed from minimum to maximum
speed
> 90 / ≤ 100 Maximum speed
8.3.3 PWM feedback signal
The PWM feedback signal offers pump information like in bus
systems:
• current power consumption (accuracy ± 2 % of PWM signal)
• warning
• alarm.
Alarms
Alarm output signals are available because some PWM output
signals are dedicated to alarm information. If a supply voltage is
measured below the specified supply voltage range, the output
signal is set to 75 %. If the rotor is locked due to deposits in the
hydraulics, the output signal is set to 90 % because this alarm has a
higher priority.
F
E
100
90
80
70
60
50
40
30
20
10
25 50 100 150 200 250 [W]
[%]
A
B
C
D
TM050006
PWM feedback signal, power consumption
Pos. Description
X-axis Output power consumption [W]
Y-axis PWM output signal in percentage [%]
A Standby (stop)
B Alarm stop: fault, blocked pump
C Alarm stop: electrical fault
D Warning
E Slope: 1 W / % PWM
F Saturation at 70 W
13
English (GB)

8.3.4 Control signal data levels
Maximum rating Symbol Value
PWM frequency input with high-
speed optocoupler f 100-4000 Hz
Guaranteed standby power
consumption < 1 W
Rated input voltage - high level UiH 4-24 V
Rated input voltage - low level UiL < 1 V
High-level input current IiH < 10 mA
Input duty cycle PWM 0-100 %
PWM frequency output, open
collector f 75 Hz ± 5 %
Accuracy of output signal
regarding power consumption -± 2 % (of PWM signal)
Output duty cycle PWM 0-100 %
Collector emitter breakdown
voltage on output transistor Uc< 70 V
Collector current on output
transistor Ic< 50 mA
Maximum power dissipation on
output resistor PR125 mW
Zener diode working voltage Uz36 V
Maximum power dissipation in
Zener diode Pz300 mW
9. Setting of the product
To set the product, use the button on the operating panel. Every
time you press the button, the pump setting is changed. The LEDs
will indicate the chosen control mode. See the table below. A cycle
is four button presses.
Display Control mode
Constant curve 1
Constant curve 2
Constant curve 3
PWM profile C
Signal off: 1 green flash per second
Signal on: 12 green flashes per second
The pump has been factory-set to constant curve 3.
9.1 Connection of the PWM input signal
To enable the external control mode (PWM profile C), you need a
signal cable connected to an external system.
Conductor Colour
Signal input Brown
Signal reference Blue
Signal output Black
The cable must be connected to the control box via a mini
superseal plug. See the figure below.
TM064414
Mini superseal plug
Related information
8.3 Control signal
9.2 Setting the signal connection
1. Make sure that the pump is turned off.
2. Locate the PWM signal connection on the pump.
The three pins inside the signal connection are not energised.
3. Connect the signal cable with the mini superseal plug.
4. Switch on the power supply.
5. Select the PWM control mode by pressing the button on the
operating panel.
14
English (GB)

10. Service
DANGER
Electric shock
Death or serious personal injury
‐All electrical connections must be carried out by a
qualified electrician in accordance with local
regulations.
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product. Make sure that the power supply
cannot be switched on accidentally.
CAUTION
Hot surface
Minor or moderate personal injury
‐The pump housing may be hot due to the pumped
liquid being scalding hot. Close the isolating valves on
both sides of the pump and wait for the pump housing
to cool down.
CAUTION
Pressurised system
Minor or moderate personal injury
‐Before dismantling the pump, drain the system or close
the isolating valves on both sides of the pump. The
pumped liquid may be scalding hot and under high
pressure.
10.1 Dismantling the product
1. Switch off the power supply.
2. Pull out the superseal power cable.
3. Close the two isolating valves on both sides of the pump.
4. Loosen the fittings.
5. Remove the pump from the system.
10.2 Deblocking the shaft
If the pump is blocked, it is necessary to deblock the shaft. The
pump deblocking device is accessible from the front of the pump
without having to demount the control box. The force of the device
is high enough to deblock pumps, which are seized by lime, for
example if the pump has been turned off during summer.
Course of action:
1. Switch off the power supply.
2. Close the valves.
3. Locate the deblocking screw in the centre of the control box.
Use a star screwdriver with a size 2 Phillips tip to push the
deblocking screw inwards.
4. When the screw can be turned counterclockwise, the shaft has
been deblocked. Repeat step 3, if necessary.
5. Switch on the power supply.
No.2
5 mm
Deblocking the shaft
Before, during and after the deblocking, the device is tight
and must not release any water.
15
English (GB)

11. Fault finding
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product. Make sure that the power supply
cannot be switched on accidentally.
CAUTION
Hot surface
Minor or moderate personal injury
‐The pump housing may be hot due to the pumped
liquid being scalding hot. Close the isolating valves on
both sides of the pump and wait for the pump housing
to cool down.
CAUTION
Pressurised system
Minor or moderate personal injury
‐Before dismantling the pump, drain the system or close
the isolating valves on both sides of the pump. The
pumped liquid may be scalding hot and under high
pressure.
If the pump has detected one or more alarms, the first LED
switches from green to red. When an alarm is active, the LEDs
indicate the alarm type as defined below.
When there is no active alarm anymore, the operating panel
switches back to operating status and the first LED switches from
red to green.
If multiple alarms are active at the same time, the LEDs
only show the error with the highest priority. The priority is
defined by the sequence of the table.
Display Status Solution
TM076950
The power supply is
switched off.
Make sure that there
is sufficient voltage
supply to the pump
and switch on the
power supply.
TM068566
Alarm
The pump stops.
The pump is
blocked.
Deblock the shaft.
TM068569
Alarm
The pump stops.
The supply voltage is
low.
Make sure that there
is sufficient voltage
supply to the pump.
TM068572
Alarm
The pump stops.
Electrical error.
Replace the pump
and send the pump
to the nearest
Grundfos Service
Center.
Related information
8.1.1 Alarm or warning
10.2 Deblocking the shaft
16
English (GB)

12. Technical data
Operating conditions
Sound pressure level The sound pressure level of the pump is lower
than 32 dB(A).
Relative humidity Max. 95 %
System pressure Max. 1.0 MPa (10 bar)
Inlet pressure
Liquid temperature Pressure
75 °C 0.005 MPa (0.05 bar)
95 °C 0.05 MPa (0.5 bar)
110 °C 0.108 MPa (1.08 bar)
Max. inlet pressure 1 MPa (10 bar)
Liquid temperature
Ambient temperature Max. liquid temperature
60 °C 2-130 °C
70 °C 2-110 °C
Liquid
Max. water/propylene glycol mixture is 50 %
Note: The water/propylene glycol mixture
reduces the performance due to higher
viscosity.
Viscosity Max. 10 mm2/s
Max. altitude of installation 2000 m above sea level
Electrical data
Supply voltage 1 x 230 V - 15 %/+ 10 %, 50/60 Hz, PE
Insulation class F (EN 60335-1)
Standby power consumption < 1 W
Inrush current < 4 A
Minimum switching time power on/off No specific requirements
Miscellaneous data
Motor protection The pump requires no external motor
protection.
Enclosure class IPX4D (with drain holes)
Temperature class (TF) TF110 at 70 °C ambient temperature
Specific EEI values
ALPHA Solar 25-145 180
ALPHA Solar 15-75 130
ALPHA Solar 25-75 130
ALPHA Solar 25-75 180
≤ 0.20 Part 3
ALPHA Solar 25-145 N 180
ALPHA Solar 25-75 N 180 ≤ 0.23 Part 3
Related information
2.2 Pumped liquids
12.1 Reduced supply voltage
The pump operation is ensured above 160 VAC with reduced
performance. If the voltage falls below 190 VAC, a low-voltage
warning is sent via the PWM signal. If the voltage falls below 150
VAC, the pump stops and shows an alarm.
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13. Accessories
13.1 Unions and valve kits
The accessory is used to connect the pump to the pipes.
The union nut must be fitted to the pump while the union tail is
connected to the pipes.
The accessory set includes everything you need for installation.
Product numbers, unions
Rp
Pump type Connection 3/4" 1" 1 1/4"
25-xx G 1 1/2 529921 529922 529821
25-xx N 529971 529972 -
32-xx G 2 - 509921 509922
R
Pump type Connection 1" 1 1/4"
25-xx G 1 1/2 529925 529924
25-xx N - -
32-xx G 2 - -
Rp
Pump type Connection 3/4" 1" 1 1/4"
25-xx G 1 1/2 - - -
25-xx N 519805 519806 519807
32-xx G 2 - - -
mm
Pump type Connection Ø22 Ø28
25-xx G 1 1/2 - -
25-xx N 519808 519809
32-xx G 2 - -
mm
Pump type Connection Ø18 Ø22 Ø28
25-xx G 1 1/2 - - -
25-xx N 529977 529978 529979
32-xx G 2 - - -
G-threads have a cylindrical form in accordance with the EN ISO
228-1 standard and are not sealing the thread. It requires a flat
gasket. You can only screw male G-threads (cylindrical) into female
G-threads. The G-threads are standard thread on the pump
housing.
R-threads are tapered external threads in accordance with the EN
10226-2 standard.
Rc- or Rp-threads are internal threads with either tapered or
cylindrical (parallel) threads. You can screw male R-threads
(conical) into female Rc- or Rp-threads.
R
RRp
G
Rc Rp R
TM077426
Thread types and combinations (examples)
13.2 Insulating shells
The insulating shells, which are tailored to the individual pump type,
can be ordered as accessories. It is easy to fit the insulating shells
around the pump.
Pump type Product number
ALPHA SOLAR 99270706
Related information
5.4 Insulation of the pump housing
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English (GB)

13.3 Cables and plugs
The pump has two electrical connections: the power supply and the
control signal connection.
Power supply connection
The installer plug is both supplied with the pump and available as
an accessory.
Power cable adapters are also available as accessories.
Control signal connection
The control signal cable connection has three conductors: the
signal input, the signal output and the signal reference. Connect the
cable to the control box by a mini superseal plug. The optional
signal cable is available as an accessory. The cable length must not
exceed 3 metres.
TM064414
Mini superseal plug
Conductor Colour
Signal input Brown
Signal reference Blue
Signal output Black
TM067298
Product description Length
[mm] Product number
Installer plug 99439948
TM076722
Product description Length
[mm] Product number
Mini superseal signal cable
(PWM input signal) 2000 99165309
TM076723
Product description Length
[mm] Product number
Superseal power cable 2000 99198990
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English (GB)

14. Performance curves
14.1 Guide to performance curves
Each pump setting has its own performance curve.
A power curve, P1, belongs to each performance curve. The power
curve shows the pump power consumption in watt at a given
performance curve.
14.2 Curve conditions
The guidelines below apply to the performance curves:
• Test liquid: airless water.
• The curves apply to a density of 983.2 kg/m3 and a liquid
temperature of 20 °C.
• All curves show average values and must not be used as
guarantee curves. If a specific minimum performance is
required, individual measurements must be made.
• The curves apply to a kinematic viscosity of 0.474 mm2/s
(0.474 cSt).
• The conversion between head H [m] and pressure p [kPa] has
been made for water with a density of 1000 kg/m3. For liquids
with other densities, for example hot water, the outlet pressure
is proportional to the density.
• Curves are obtained according to EN 16297.
• It is not obligatory to show PL,Avg, but it gives an indication on
the yearly expectable average power consumption.
• Maximum curves are limited by speed and power
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English (GB)