Grundfos ALPHA1 B User manual

ALPHA1
Model B
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

2

Table of contents
3
ALPHA1
English (GB)
Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Deutsch (DE)
Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Français (FR)
Notice d'installation et de fonctionnement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Italiano (IT)
Istruzioni di installazione e funzionamento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

English (GB)
4
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions describe ALPHA1
model B.
Sections 1-5 give the information necessary to be able to unpack,
install and start up the product in a safe way.
Sections 6-12 give important information about the product, as
well as information on service, fault finding and disposal of the
product.
CONTENTS
Page
1. General information
1.1 Target group
1.2 Hazard statements
The symbols and hazard statements below may appear in
Grundfos installation and operating instructions, safety
instructions and service instructions.
The hazard statements are structured in the following way:
1. General information 4
1.1 Target group 4
1.2 Hazard statements 4
1.3 Notes 5
2. Receiving the product 5
2.1 Inspecting the product 5
2.2 Scope of delivery 5
3. Installing the product 5
3.1 Mechanical installation 5
3.2 Control box positions 6
3.3 Insulating the pump housing 7
4. Electrical installation 7
4.1 Assembling the plug 8
4.2 Dismantling the plug 9
5. Starting up the product 9
5.1 Before startup 9
5.2 First startup 9
5.3 Venting the pump 10
5.4 Venting the heating system 10
6. Product introduction 11
6.1 Product description 11
6.2 Applications 11
6.3 Pumped liquids 12
6.4 Identification 12
7. Control functions 13
7.1 Elements on the operating panel 13
7.2 Display 13
7.3 Light fields indicating the pump setting 13
7.4 Button for selection of pump setting 13
7.5 Control modes 14
7.6 Pump performance 16
8. Fault finding the product 17
9. Technical data 18
9.1 Data and operating conditions 18
9.2 Dimensions 19
10. Performance curves 20
10.1 Guide to performance curves 20
10.2 Curve conditions 20
10.3 Performance curves, ALPHA1, XX-40 (N) 21
10.4 Performance curves, ALPHA1, XX-50 (N) 22
10.5 Performance curves, ALPHA1, XX-60 (N) 23
10.6 Performance curves, ALPHA1, XX-80 (N) 24
11. Accessories 25
11.1 Unions 25
11.2 Insulating shells 26
11.3 ALPHA plugs 26
12. Disposing of the product 26
Read this document and the quick guide before
installing the product. Installation and operation must
comply with local regulations and accepted codes of
good practice.
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.
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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.

English (GB)
5
1.3 Notes
The symbols and notes below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
2. Receiving the product
2.1 Inspecting the product
Check that the product received is in accordance with the order.
Check that the voltage and frequency of the product match
voltage and frequency of the installation site. See section
6.4.1 Nameplate.
2.2 Scope of delivery
The box contains the following items:
• ALPHA1 pump
• ALPHA plug
• insulating shells
• two gaskets
• quick guide.
3. Installing the product
3.1 Mechanical installation
3.1.1 Mounting the product
Fig. 1 Mounting the product
The arrows on the pump housing indicate the flow direction
through the pump. See fig. 1, pos. A.
1. Fit the two gaskets when you mount the pump in the pipe. See
fig. 1, pos. B.
2. Install the pump with a horizontal motor shaft. See fig. 1, pos.
C. See also section 3.2 Control box positions.
3. Tighten the fittings.
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.
TM05 3057 0612

English (GB)
6
3.2 Control box positions
Fig. 2 Control box positions
Always install the pump with a horizontal motor shaft.
• Pump installed correctly in a vertical pipe. See fig. 2, pos. A.
• Pump installed correctly in a horizontal pipe. See fig. 2, pos. B.
• Do not install the pump with a vertical motor shaft. See fig. 2,
pos. C and D.
3.2.1 Positioning of the control box in heating and domestic
hot-water systems
You can position the control box in position 3, 6 and 9 o'clock.
See fig. 3.
Fig. 3 Control box positions, heating and domestic hot-water
systems
3.2.2 Positioning the control box in air-conditioning and
cold-water systems
Position the control box with the plug pointing downwards. See
fig. 4.
Fig. 4 Control box position, air-conditioning and cold-water
systems
3.2.3 Changing the control box position
Fig. 5 Changing the control box position
You can turn the control box in steps of 90 °.
1. Remove the four screws.
2. Turn the pump head to the desired position.
3. Insert and cross-tighten the screws.
TM06 9089 4317TM06 9090 4317TM06 9091 4317
AB
CD
CAUTION
Hot surface
Minor or moderate personal injury
- Position the pump so that persons cannot
accidentally come into contact with hot surfaces.
CAUTION
Pressurised system
Minor or moderate personal injury
- Before dismantling the pump, drain the system or
close the isolating valve on either side of the
pump. The pumped liquid may be scalding hot and
under high pressure.
If you change the position of the control box, fill the
system with the liquid to be pumped or open the
isolating valves.
TM06 9092 4317
1
2
3
4

English (GB)
7
3.3 Insulating the pump housing
Fig. 6 Insulating the pump housing
You can reduce the heat loss from the pump by insulating the
pump housing with the insulating shells supplied with the pump.
See fig. 6.
4. Electrical installation
Carry out the electrical connection and protection in accordance
with local regulations.
• The motor requires no external motor protection.
• Check that the supply voltage and frequency correspond to
the values stated on the nameplate. See section
6.4.1 Nameplate.
• Connect the pump to the power supply with the plug supplied
with the pump. See steps 1 to 7.
TM06 9093 4317
Do not insulate the control box or cover the operating
panel.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before starting any
work on the product. Make sure that the power
supply cannot be accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
- Connect the pump to 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
- If national legislation requires a Residual-Current
Device (RCD) or equivalent in the electrical
installation, or if the pump is connected to an
electric installation where an RCD is used as an
additional protection, this must be type A or better,
due to the nature of the pulsating DC leakage
current. The RCD must be marked with the symbol
shown below;

English (GB)
8
4.1 Assembling the plug
Step Action Illustration
1
Fit the cable gland
and plug cover to
the cable. Strip the
cable conductors
as illustrated.
TM05 5538 3812
2
Connect the cable
conductors to the
power supply plug.
TM05 5539 3812
3
Bend the cable
with the cable
conductors
pointing upwards.
TM05 5540 3812
4
Pull out the
conductor guide
plate and throw it
away.
TM05 5541 3812
5
Click the plug
cover onto the
power supply plug.
TM05 5542 3812
0.5 - 1.5 mm2
12 mm
∅5.5 - 10 mm
7 mm
17 mm
L
N
6
Screw the cable
gland onto the
power supply plug.
TM05 5543 3812
7
Insert the power
supply plug into
the male plug in
the pump control
box.
TM05 3059 0912
Step Action Illustration

English (GB)
9
4.2 Dismantling the plug
5. Starting up the product
5.1 Before startup
Do not start the pump until the system has been filled with liquid
and vented. Make sure that the required minimum inlet pressure
is available at the pump inlet. See section 9. Technical data. For
instructions on how to vent the system, see sections 5.3 Venting
the pump and 5.4 Venting the heating system.
5.2 First startup
After installing the product, see section 3. Installing the product,
turn on the power supply. The light in the operating panel shows
that the power supply has been switched on. See fig. 7.
The pump is factory set to intermediate proportional-pressure
curve, PP2.
Fig. 7 Starting the pump
Step Action Illustration
1
Loosen the cable
gland and remove it
from the plug.
TM05 5545 3812
2
Pull off the plug
cover while pressing
on both sides.
TM05 5546 3812
3
Add the conductor
guide plate to loosen
all three cable
conductors at the
same time.
If the guide plate is
missing, then loosen
the cable conductors
one by one by
pressing a
screwdriver gently
into the terminal clip.
TM05 5547 3812
4
The plug has now
been removed from
the power supply
plug.
TM05 5548 3812
TM06 9094 4317
1 x 230 V± 10 %
∽50/60 Hz
0/O
1/On

English (GB)
10
5.3 Venting the pump
Fig. 8 Venting the pump
The pump is self-venting through the system. You do not have to
vent the pump before startup.
Air in the pump may cause noise. This noise ceases when the
pump has run for a few minutes.
You obtain quick venting of the pump by setting the pump to
speed III for a short period. How fast the pump is vented depends
on the system size and design.
When you have vented the pump, i.e. when the noise has
ceased, set the pump according to the recommendations. See
section 7. Control functions.
You cannot vent the system through the pump. See section
5.4 Venting the heating system.
5.4 Venting the heating system
Fig. 9 Venting of the heating system
Vent the heating system via a vent valve installed above the
pump (1).
When the heating system has been filled with liquid, do as
follows:
1. Open the vent valve.
2. Set the pump to speed III.
3. Let the pump run for a short period.
4. Set the pump according to the recommendations. See section
7. Control functions.
Repeat the procedure, if necessary.
TM06 9104 4317
The pump must not run dry.
10 Min.
1
2
POWER
ON
TM06 9105 4317
The pump must not run dry.
10 Min.
2
1
3
POWER
ON

English (GB)
11
6. Product introduction
6.1 Product description
Fig. 10 Pumped liquids, warnings and operating conditions
ALPHA1 pumps are a complete range of circulator pumps.
6.1.1 Model type
These installation and operating instructions cover ALPHA1
model B. The model type is stated on the packaging and
nameplate. See figs 11 and 12.
Fig. 11 Model type on the packaging
Fig. 12 Model type on the nameplate
6.2 Applications
The pump is designed for the circulation of water in heating
systems, domestic hot-water systems as well as air-conditioning
and cold-water systems.
Cold-water systems are defined as systems where the ambient
temperature is higher than the temperature of the pumped liquid.
The pump is the best choice for the following systems:
• underfloor heating systems
• one-pipe systems
• two-pipe systems.
The pump is suitable for the following:
• Systems with constant or variable flow rates where you want
to optimise the setting of the pump duty point.
• Systems with variable flow-pipe temperature.
TM06 9095 4317TM06 9106 4317
< 43 dB(A)
Max. 95 % RH
IPX4D
Min./Max.
+2 °C / +110 °C
Min./Max.
0 °C / +40 °C
Max. 1.0 MPa
(10 bar)
1
2
3
4
5
6
7
TM06 9103 4317

English (GB)
12
6.3 Pumped liquids
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 pump is suitable for the following liquids:
• Thin, clean, non-aggressive and non-explosive liquids, not
containing solid particles or fibres.
• Cooling liquids, not containing mineral oil.
• Domestic hot water
Maximum: 14 °dH
Maximum: 65 °C
Maximum peak: 70 °C.
For water with a higher degree of hardness, we recommend
that you use a direct-coupled TPE pump.
• Softened water.
The kinematic viscosity of water is 1 mm2/s (1 cSt) at 20 °C. If the
pump is used for a liquid with a higher viscosity, the hydraulic
performance of the pump will be reduced.
Example: 50 % glycol at 20 °C means a viscosity of approx. 10
mm2/s (10 cSt) and a reduction of the pump performance by
approx. 15 %.
Do not use additives that can or will disturb the functionality of the
pump.
When selecting a pump, take the viscosity of the pumped liquid
into consideration.
For more information about the pumped liquids, warnings and
operating conditions, see fig. 10.
6.4 Identification
6.4.1 Nameplate
Fig. 13 Nameplate
CAUTION
Flammable material
Minor or moderate personal injury
- Do not use the pump for flammable liquids, such
as diesel oil and petrol.
WARNING
Biological hazard
Death or serious personal injury
- In domestic hot-water systems, the temperature of
the pumped liquid must always be according to
local legislation.
CAUTION
Corrosive substance
Minor or moderate personal injury
- Do not use the pump for aggressive liquids, such
as acids and seawater.
TM06 9096 4317
Pos. Description
1 Pump type, operating panel
2
Rated current [A]:
• Min.: Minimum current [A]
• Max.: Maximum current [A]
3 CE mark and approvals
4EEI: Energy Efficiency Index
Part, according to EEI
5 Voltage [V]
6 Product number
7 Serial number
8 Model
9 Country of origin
10
Input power P1 [W]:
• Min.: Minimum input power P1 [W]
• Max.: Maximum input power P1 [W]
11 Maximum system pressure [MPa]
12 Enclosure class
13 Temperature class
14
Production code:
• 1st and 2nd figures: year
• 3rd and 4th figures: week
15 Frequency [Hz]
16 Data matrix code
1
8
9
7
6
5
4
3
210
15
16
14
13
12
11
ALPHA1 XX-XX XXX
POWER
ON

English (GB)
13
6.4.2 Type key
7. Control functions
7.1 Elements on the operating panel
Fig. 14 Operating panel
7.2 Display
The display (1) is on when you have switched on the power
supply.
The display shows the actual pump power consumption in watt.
If the pump impeller is rotated, for example when filling the pump
with water, sufficient energy can be generated to light up the
display even if the power supply has been switched off.
7.3 Light fields indicating the pump setting
The pump has nine performance settings which you can select
with the button (5). See fig. 14.
The pump setting is indicated by nine light fields in the display.
See fig. 15.
Fig. 15 Nine light fields
For information about the function of the settings, see section
7.5 Control modes.
7.4 Button for selection of pump setting
Every time you press the button , the pump setting is changed.
See fig. 14, pos. 5.
A cycle is nine button presses. See section 7.3 Light fields
indicating the pump setting.
Example ALPHA1 25 -40 N 180
Pump type
[ ]: Standard version
Nominal diameter (DN) of inlet and outlet
ports [mm]
Maximum head [dm]
[ ]: Cast-iron pump housing
N: Stainless-steel pump housing
Port-to-port length [mm]
TM06 9101 4317
Pos. Description
1 Display showing the actual power consumption in watt.
2Light fields indicating the pump setting.
See section 7.3 Light fields indicating the pump setting.
3 Button for selection of pump setting.
1
2
3
POWER
ON
ALPHA1
TM06 9100 4317
Button
presses
Active light
fields Description
0
Factory setting Intermediate
proportional-pressure curve,
PP2
1
Highest
proportional-pressure curve,
PP3
2
Lowest constant-pressure
curve, CP1
3
Intermediate
constant-pressure curve,
CP2
4
Highest constant-pressure
curve, CP3
5
Constant curve/constant
speed III
6
Constant curve/constant
speed II
7
Constant curve/constant
speed I
8Lowest proportional-pressure
curve, PP1
POWER
ON

English (GB)
14
7.5 Control modes
7.5.1 Pump setting for two-pipe heating systems
Fig. 16 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
16:
* See section 10.1 Guide to performance curves.
Proportional-pressure curve, PP1, PP2 or PP3
Proportional-pressure control adjusts the pump performance to
the actual heat demand in the system. The pump performance
follows the selected performance curve, PP1, PP2 or PP3. See
fig. 17 where PP2 has been selected. For further information, see
section 10.1 Guide to performance curves.
Fig. 17 Three proportional-pressure curves and settings
The selection of the proportional-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
7.5.2 Pump setting for one-pipe heating systems
Fig. 18 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
18:
* See section 10.1 Guide to performance curves.
Constant-pressure curve, CP1, CP2 or CP3
The constant-pressure control adjusts the flow rate to the actual
heat demand in the system keeping a constant pressure at the
same time. The pump performance follows the selected
performance curve, CP1, CP2 or CP3. See fig. 21 where CP1 has
been selected. For further information, see section 10.1 Guide to
performance curves.
Fig. 19 Three constant-pressure curves and settings
The selection of the constant-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
TM06 9102 4317
Heating
system
Pump setting
Recommended Alternative
Two-pipe
system
Proportional-pressure
curve PP1, PP2 or
PP3*
Constant-pressure
curve CP1, CP2 or
CP3*
TM07 0086 4117
Q
H
PP3
PP2
PP1
Q
H
TM06 9099 4317
Heating
system
Pump setting
Recommended Alternative
One-pipe
system
Constant-pressure
curve CP1, CP2 or
CP3*
Constant curve/constant
speed, I, II or III*
TM07 0087 4117
Q
H
Q
H
CP3
CP2
CP1

English (GB)
15
7.5.3 Pump setting for underfloor heating systems
Fig. 20 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
20:
* See section 10.1 Guide to performance curves.
Constant-pressure curve, CP1, CP2 or CP3
The constant-pressure control adjusts the flow rate to the actual
heat demand in the system keeping a constant pressure at the
same time. The pump performance follows the selected
performance curve, CP1, CP2 or CP3. See fig. 21 where CP1 has
been selected. For further information, see section 10.1 Guide to
performance curves.
Fig. 21 Three constant-pressure curves and settings
The selection of the constant-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
7.5.4 Pump setting for domestic hot-water systems
Fig. 22 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
22:
* See section 10.1 Guide to performance curves.
Constant curve/constant speed, I, II or III
At constant-curve/constant-speed operation, the pump runs at a
constant speed, independently of the actual flow rate demand in
the system. The pump performance follows the selected
performance curve, I, II or III. See fig. 23 where II has been
selected. For further information, see section 10.1 Guide to
performance curves.
Fig. 23 Three constant curve and constant speed settings
The selection of the constant-curve and constant-speed setting
depends on the characteristics of the heating system and the
number of taps likely to be opened at the same time.
7.5.5 Changing from recommended to alternative pump
setting
Heating systems are relatively slow systems that cannot be set to
the optimum operation within minutes or hours.
If the recommended pump setting does not give the desired
distribution of heat in the rooms of the house, change the pump
setting to the shown alternative.
TM06 9098 4317
System type Pump setting
Recommended Alternative
Underfloor
heating
Constant-pressure
curve, CP1, CP2 or
CP3*
Constant curve/constant
speed, I, II or III
TM07 0087 4117
Q
H
Q
H
CP3
CP2
CP1
TM05 3068 0912
System type Pump setting
Recommended Alternative
Domestic hot
water
Constant curve/constant
speed, I, II or III
Constant-pressure
curve, CP1, CP2 or
CP3*
TM05 3068 0912
Q
H
Q
H

English (GB)
16
7.6 Pump performance
Relation between pump setting and pump performance.
Figure 24 shows the relation between pump setting and pump
performance by means of curves. See also section
10. Performance curves.
Fig. 24 Pump setting in relation to pump performance
TM05 2771 2817
Setting Pump curve Function
PP1
Lowest
proportional-pressure
curve
The duty point of the pump will move up or down on the lowest proportional-pressure curve,
depending on the heat demand. See fig. 24.
The head is reduced at falling heat demand and increased at rising heat demand.
PP2
Intermediate
proportional-pressure
curve
The duty point of the pump will move up or down on the intermediate proportional-pressure curve,
depending on the heat demand. See fig. 24.
The head is reduced at falling heat demand and increased at rising heat demand.
PP3
Highest
proportional-pressure
curve
The duty point of the pump will move up or down on the highest proportional-pressure curve,
depending on the heat demand. See fig. 24.
The head is reduced at falling heat demand and increased at rising heat demand.
CP1
Lowest
constant-pressure
curve
The duty point of the pump will move out or in on the lowest constant-pressure curve, depending
on the heat demand in the system. See fig. 24.
The head is kept constant, irrespective of the heat demand.
CP2
Intermediate
constant-pressure
curve
The duty point of the pump will move out or in on the intermediate constant-pressure curve,
depending on the heat demand in the system. See fig. 24.
The head is kept constant, irrespective of the heat demand.
CP3
Highest
constant-pressure
curve
The duty point of the pump will move out or in on the highest constant-pressure curve, depending
on the heat demand in the system. See fig. 24.
The head is kept constant, irrespective of the heat demand.
III Speed III
The pump runs on a constant curve which means that it runs at a constant speed.
In speed III, the pump is set to run on the maximum curve under all operating conditions. See fig.
24.
You obtain quick venting of the pump by setting the pump to speed III for a short period. See
section 5.3 Venting the pump.
II Speed II
The pump runs on a constant curve which means that it runs at a constant speed.
In speed II, the pump is set to run on the intermediate curve under all operating conditions. See
fig. 24.
I Speed I
The pump runs on a constant curve which means that it runs at a constant speed.
In speed I, the pump is set to run on the minimum curve under all operating conditions. See fig.
24.
III
II
I
H
PP3
CP3
CP2
PP1
CP1
PP2
Q

English (GB)
17
8. Fault finding the product
High-torque start
If the shaft is blocked and you cannot start the pump, the display
indicates the alarm "E 1 - "- -"", with a delay of 20 minutes.
The pump attempts to restart until the pump is powered off.
During the start attempts, the pump vibrates due to the
high-torque load.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before starting any
work on the product. Make sure that the power
supply cannot be accidentally switched on.
CAUTION
Pressurised system
Minor or moderate personal injury
- Before dismantling the pump, drain the system or
close the isolating valves on either side of the
pump. The pumped liquid may be scalding hot
and under high pressure.
Fault Operating panel Cause Remedy
1. The pump does not
run.
Light off. a) A fuse in the installation is blown. Replace the fuse.
b) The current-operated or
voltage-operated circuit breaker has
tripped.
Cut in the circuit breaker.
c) The pump is defective. Replace the pump.
Changes between "- -"
and "E 1".
a) The rotor is blocked. Remove the impurities.
Changes between "- -"
and "E 2".
a) Insufficient supply voltage. Make sure that the supply voltage falls
within the specified range.
Changes between "- -"
and "E 3".
a) Electrical fault. Replace the pump.
2. Noise in the system. No warning is indicated
on the display.
a) Air in the system. Vent the system.
See section 5.4 Venting the heating
system.
b) The flow rate is too high. Reduce the suction head.
3. Noise in the pump. No warning is indicated
on the display.
a) Air in the pump. Let the pump run. The pump vents itself
over time.
See section 5.3 Venting the pump.
b) The inlet pressure is too low. Increase the inlet pressure, or make
sure that the air volume in the expansion
tank is sufficient, if installed.
4. Insufficient heat. No warning is indicated
on the display.
a) The pump performance is too low. Increase the suction head.

English (GB)
18
9. Technical data
9.1 Data and operating conditions
To avoid condensation in the control box and stator, the liquid
temperature must always be higher than the ambient
temperature.
Supply voltage 1 x 230 V ± 10 %, 50 or 60 Hz, PE
Motor protection The pump requires no external motor protection.
Enclosure class IPX4D
Insulation class F
Relative humidity Maximum 95 % RH
System pressure Maximum 1.0 MPa, 10 bar, 102 m head
Inlet pressure
Liquid temperature Minimum inlet pressure
≤75 °C 0.005 MPa, 0.05 bar, 0.5 m head
90 °C 0.028 MPa, 0.28 bar, 2.8 m head
110 °C 0.108 MPa, 1.08 bar, 10.8 m head
EMC (electromagnetic
compatibility)
EMC Directive (2014/30/EU).
Standards used:
EN 55014-1:2006/A1:2009/A2:2011
EN 55014-2:2015
EN 61000-3-2:2014
EN 61000-3-3:2013
Sound pressure level The sound pressure level of the pump is lower than 43 dB(A).
Ambient temperature 0-40 °C
Temperature class TF110 to EN 60335-2-51
Surface temperature The maximum surface temperature will not exceed 125 °C.
Liquid temperature 2-110 °C
Specific EEI values EEI ≤0.20
Ambient
temperature
[°C]
Liquid temperature
Min.
[°C]
Max.
[°C]
02110
10 10 110
20 20 110
30 30 110
35 35 90
40 40 70
If the temperature of the pumped liquid is lower than
the ambient temperature, make sure that the pump is
installed with the pump head and plug in position 6
o'clock.

English (GB)
19
9.2 Dimensions
Dimensional sketches and table of dimensions.
Fig. 25 ALPHA1 model B
* Not available in all countries.
TM07 0102 4217
Pump type Dimensions
L1 B1 B2 B3 B4 H1 H2 H3 G
ALPHA1 15-40 130 54 54 44 44 36 104 47 G1
ALPHA1 15-50* 130 54 54 44 44 36 104 47 G1
ALPHA1 15-60 130 54 54 44 44 36 104 47 G1
ALPHA1 15-80 130 54 54 44 44 36 104 47 G1
ALPHA1 25-40 130 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-40 N 130 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-40 180 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-40 N 180 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-50* 130 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-50 N* 130 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-50* 180 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-50 N* 180 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-60 130 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-60 N 130 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-60 180 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-60 N 180 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-80 130 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-80 N* 130 54 54 44 44 37 104 47 G1 1/2
ALPHA1 25-80 180 54 54 44 44 36 104 47 G1 1/2
ALPHA1 25-80 N* 180 54 54 44 44 37 104 47 G1 1/2
ALPHA1 32-40 180 54 54 44 44 36 104 47 G2
ALPHA1 32-50* 180 54 54 44 44 36 104 47 G2
ALPHA1 32-60 180 54 54 44 44 36 104 47 G2
ALPHA1 32-80 180 54 54 44 44 36 104 47 G2

English (GB)
20
10. Performance curves
10.1 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.
The P1 value corresponds to the value that you can read from the
pump display. See fig. 26.
Fig. 26 Performance curves in relation to pump setting
For further information about pump settings, see this section:
7. Control functions
10.2 Curve conditions
The guidelines below apply to the performance curves on the
following pages:
• Test liquid: airless water.
• The curves apply to a density of 983.2 kg/m3and a liquid
temperature of 60 °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 for speeds I, II and III are marked.
• The curves apply to a kinematic viscosity of 0.474 mm2/s
(0.474 cSt).
• Curves are obtained according to EN 16297.
TM07 0037 3917
III
II
I
Q
P1
H
III
II
I
PP3
CP3
CP2
PP1
CP1
PP2
Q
Setting Pump curve
PP1 Lowest proportional-pressure curve
PP2 Intermediate proportional-pressure curve
PP3 Highest proportional-pressure curve
CP1 Lowest constant-pressure curve
CP2 Intermediate constant-pressure curve
CP3 Highest constant-pressure curve
III Constant curve or constant speed III
II Constant curve or constant speed II
I Constant curve or constant speed I