Grundfos ALPHA1 L Series User manual

ALPHA1 L
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions describe Grundfos
ALPHA1 L.accepted
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 Symbols used in this document
1.1.1 Warnings against hazards involving risk of death or
personal injury
The text accompanying the three hazard symbols DANGER,
WARNING and CAUTION is structured in the following way:
1.1.2 Other important notes
1. General information 2
1.1 Symbols used in this document 2
2. Receiving the product 3
2.1 Inspecting the product 3
2.2 Scope of delivery 3
3. Installing the product 3
3.1 Mechanical installation 3
3.2 Pump positions 3
3.3 Control box positions 4
3.4 Insulating the pump housing 4
4. Electrical installation 4
4.1 Assembling the installer plug 5
5. Starting up the product 6
5.1 Before startup 6
5.2 Starting up the pump 6
5.3 Venting the system 6
5.4 Venting the pump 7
6. Product introduction 7
6.1 Product description 7
6.2 Applications 7
6.3 Pumped liquids 8
6.4 Identification 8
7. Control functions 9
7.1 Elements on the control panel 9
7.2 Control panel 9
7.3 Pump settings 9
7.4 Control modes 10
7.5 Pump performance 12
8. Setting the product 13
9. Fault finding the product 14
9.1 Deblocking the shaft 14
10. Technical data 15
10.1 Dimensions, ALPHA1 L XX-40, XX-60, XX-65 16
10.2 Guide to performance curves 17
10.3 Curve conditions 17
10.4 Performance curves, ALPHA1 L XX-40 (N) 18
10.5 Performance curves, ALPHA1 L XX-60 (N) 19
10.6 Performance curves, ALPHA1 L XX-65 (N) 20
11. Accessories 21
11.1 Unions and valve kits 21
11.2 Insulating shells 21
11.3 Power supply 22
11.4 Control signal connection (PWM profile A) 22
12. Disposing of the product 22
Read this document and the quick guide before you
install 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.
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.

English (GB)
3
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 L pump
• installer plug
• two gaskets
• quick guide.
3. Installing the product
3.1 Mechanical installation
3.1.1 Mounting the product
1. The arrows on the pump housing indicate the flow direction
through the pump. See fig. 1.
2. Fit the two gaskets when you mount the pump in the pipe.
Install the pump with a horizontal motor shaft. See fig. 2. See
also section 3.3 Control box positions.
3. Tighten the fittings. See fig. 3.
Fig. 1 Flow direction
Fig. 2 Pump installation
Fig. 3 Tightening the fittings
3.2 Pump positions
Always install the pump with a horizontal motor shaft. Do not
install the pump with a vertical motor shaft. See fig. 4, bottom row.
• Pump installed correctly in a vertical pipe. See fig. 4, top row,
left.
• Pump installed correctly in a horizontal pipe. See fig. 4, top
row, right.
Fig. 4 Pump positions
TM06 8535 1317TM06 8536 1317
TM06 8537 1317TM06 8538 1317

English (GB)
4
3.3 Control box positions
The control box can be mounted in all positions. See fig. 5.
Fig. 5 Possible control box positions
3.3.1 Changing the control box position
3.4 Insulating the pump housing
Fig. 6 Insulating the pump housing
You can reduce the heat loss from the pump and pipe by
insulating the pump housing and the pipe with insulating shells,
which can be ordered as an accessory. 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 7297 3616
Step Action Illustration
1
Make sure that
the inlet and
outlet valves
are closed.
Unscrew the
screws on the
pump head.
TM06 8539 1317
2
Turn the pump
head to the
desired
position.
TM06 8540 1317
3
Refit the
screws on the
pump head.
TM06 8541 1317
TM06 8564 1317
Do not insulate the control box or cover the control
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.

English (GB)
5
4.1 Assembling the installer plug
Step Action Illustration
1
Loosen the cable
gland and
unscrew the union
nut in the centre
of the terminal
cover.
TM06 8542 1317
2Detach the
terminal cover.
TM06 8543 1317
3
Pull the power
cable through the
cable gland and
terminal cover.
TM06 8544 1317
4
Strip the cable
conductors as
illustrated.
TM06 8545 1317
5
Loosen the
screws on the
power supply plug
and connect the
cable conductors.
TM06 8546 1317 - TM06 8547 1317
6
Tighten the
screws on the
power supply
plug.
TM06 8548 1317
17 mm
12 mm
Ø 5.5 - 10 mm
Max. 1.5 mm2
x 3
x 3
7
Refit the terminal
cover. See A.
Note: It is possible
to turn the power
supply plug on the
side for a 90 °
cable entry. See
B.
TM06 8549 1317 - TM06 8550 1317
8Tighten the union
nut.
TM06 8551 1317
9
Tighten the cable
gland onto the
power supply
plug.
TM06 8552 1317
10
Insert the power
supply plug into
the male plug on
the pump.
TM06 8553 1317
Step Action Illustration
B
A

English (GB)
6
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 10. Technical data.
When using the pump for the first time, the system must be
vented at the highest point. See section 5.3 Venting the system.
The pump is self-venting through the system.
5.2 Starting up the pump
5.3 Venting the system
Fig. 7 Venting the system
When the system has been filled with liquid and the minimum
inlet pressure is available at the pump inlet, do as follows:
1. If turned off, turn on the pump. See section 5.2 Starting up the
pump.
2. If the vent valve is installed in the system, open up the valve
manually. See fig. 7, 1A. If the pump housing has an air
separator installed (ALPHA1 L XX-XX A) and an automatic
vent has been fitted, the air escapes automatically. See fig. 7,
1B.
3. Set the pump to speed III. See fig. 7, 2.
4. Let the pump run for approximately 10 minutes. See fig. 7, 3.
Repeat step 1-3, if necessary.
5. Set the pump according to the recommendations. See section
7. Control functions.
Step Action Illustration
1Open the inlet and
outlet valves.
TM06 8554 1317
2Turn on the power
supply.
TM06 8555 1317
3
The lights in the
control panel
indicates that the
power supply has
been switched on
and the pump is
running.
TM06 8556 1317
0/Off
1/On
TM06 9069 1617
In heating systems that often contain much air, we
recommend that you install pumps with pump
housing with air separator, that is ALPHA1 L XX-XX
A. The pump housing has an Rp 3/8 tapping for fitting
of an automatic air vent. The vent is not supplied with
the pump.
The pump must not run dry.
= 10 min.
2
1A 1B
3

English (GB)
7
5.4 Venting the pump
Fig. 8 Venting the pump
Small airlocks 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 for approximately 10 minutes. How
fast the pump is vented depends on the system size and
design.
2. When you have vented the pump, that is when the noise has
ceased, set the pump according to the recommendations. See
section 7. Control functions.
6. Product introduction
6.1 Product description
ALPHA1 L model C is a complete range of circulator pumps.
See section 10. Technical data for further information.
6.1.1 Model type
These installation and operating instructions cover ALPHA1 L
model C. The model type is stated on the packaging.
6.2 Applications
The ALPHA1 L is designed for circulating liquids in all kinds of
heating applications. The pumps are suitable for the following
systems:
• Systems with constant or variable flows where it is desirable to
optimise the pump duty point.
• Systems with variable flow-pipe temperature.
ALPHA1 L is especially suitable for the following:
• Installation in existing systems where the differential pressure
of the pump is too high during periods of reduced flow
demand.
• Installation in new systems for automatic adjustment of the
performance to flow demands without the use of bypass
valves or similar expensive components.
High-efficiency ECM (Electronically Commutated Motor) pumps,
such as ALPHA1 L, 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.
TM06 8575 1617
The pump must not run dry.
The pump is from factory set to radiator heating
mode.
= 10 min.
1
2
TM06 8557 1317
75 °C 95 °C
0.005 MPa 0.05 MPa
0.05 bar 0.5 bar
Max. 1.0 MPa (10 bar)
Min. 2 °C 0 °C
Max.95 °C 55 °C

English (GB)
8
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 clean, thin, non-aggressive and
non-explosive liquids, not containing solid particles, fibres or
mineral oil. The pump must not be used for the transfer of
flammable liquids, such as diesel oil, petrol and similar liquids.
• Maximum water/propylene glycol mixture is 50 %
• Maximum 10 mm2/s viscosity
Note: The water/propylene glycol mixture reduces the
performance due to higher viscosity.
See section 10. Technical data for further information.
6.4 Identification
6.4.1 Nameplate
Fig. 9 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 above 50 °C
due to the risk of legionella.
WARNING
Biological hazard
Death or serious personal injury
- In domestic hot-water systems, the pump is
permanently connected to the mains water.
Therefore, do not connect the pump by a hose.
CAUTION
Corrosive substance
Minor or moderate personal injury
- Do not use the pump for aggressive liquids, such
as acids and seawater.
TM06 8664 1717
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 Product number
8 Serial number
9 Country of manufacture
10 Frequency [Hz]
11 Part, according to EEI
12 Enclosure class
13 Manufacturer’s name and address
14 Minimum input power [W]
15 Maximum input power [W]
16 Maximum system pressure
17 VDE code
18 Average compensated power input PL, avg [W]
19 TF class
20 Minimum liquid temperature
21
Production code:
• 1st and 2nd figures: year
• 3rd and 4th figures: week
1
l1/1(A)
Grundfos Holding A/S,
DK-8850 Bjerringbro
P1(W) MPa
Min.
Max.
X.XX
X.XX
XX
XXX X.X
((,;;3DUW;
;;;9a;;;;+],3;;;7);;;
31;;;;;;;;3&;;;;;;;;
61;;;;;;;;
Made in XXXXXXX
*)1;;
3
L.avg. <XXW
Denmark
2
3
4
5
6
7
8
9
14
15
16
17
18
19
20
21
1310 11 12
0LQ;;&

English (GB)
9
6.4.2 Type key
7. Control functions
7.1 Elements on the control panel
Fig. 10 Control panel
7.2 Control panel
The control panel shows the following:
• the settings, after pressing the button
• operating status
• alarm status.
7.2.1 Operating status
During operation, the control panel shows the actual operating
status or the alarm status. See section 7.2.2 Alarm status.
7.2.2 Alarm status
If the pump has detected one or more alarms, the first LED
switches from green to red. When the fault has been resolved the
control panel switches back to operating status.
See section 9. Fault finding the product.
7.3 Pump settings
The pump has seven different control modes. The pump can be
set to the following:
Fig. 11 Pump setting table
To learn more about each control mode, see section 7.4 Control
modes.
Example ALPHA1 L 25 -40 180
Pump type
Nominal diameter (DN) of inlet and outlet
ports [mm]
Maximum head [dm]
[ ]: Cast-iron pump housing
A: Pump housing with air separator
N: Stainless-steel pump housing
Port-to-port length [mm]
TM06 7286 4616
Symbol Description
Push-button
I, II, III Constant-speed curve I, II and III
Radiator heating mode (proportional pressure)
Underfloor heating mode (constant pressure)
Setting Description
I Constant curve or constant speed I
II Constant curve or constant speed II
III Constant curve or constant speed III
Factory setting:
Radiator heating mode
Underfloor heating control mode
Fixed proportional curve
Externally controlled:
PWM profile A
3 s.

English (GB)
10
7.4 Control modes
7.4.1 Radiator heating mode
The radiator heating mode adjusts both flow and pressure to the
actual heat demand. The pump performance follows the selected
performance curve.
Fig. 12 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
12:
Factory setting: Radiator heating mode.
7.4.2 Fixed proportional-pressure curve
An option to the radiator heating mode is a fixed
proportional-pressure curve. The pump performance follows the
selected performance curve.
7.4.3 Underfloor heating mode
The underfloor heating mode adjusts the flow to the actual heat
demand in the system while at the same time keeping a constant
pressure. The pump performance follows the selected
performance curve.
Fig. 13 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
13:
Factory setting: Radiator heating mode. See section
7.4.1 Radiator heating mode.
7.4.4 Constant curve or constant speed, I, II or III
At constant-curve or constant-speed operation, the pump runs at
a constant curve. The pump performance follows the selected
performance curve, I, II or III. See fig. 14 where II has been
selected. For further information, see section 10.2 Guide to
performance curves.
Fig. 14 Three constant-curve/constant-speed settings
The selection of the constant-curve or constant-speed setting
depends on the characteristics of the heating system in question.
7.4.5 Pump setting for one-pipe heating systems
Recommended and alternative pump settings:
Factory setting: Radiator heating mode. See section
7.4.1 Radiator heating mode.
TM06 8815 1217
System type
Pump setting
Recommended Alternative
Two-pipe
system
Radiator heating
mode
Constant curve or constant
speed I, II, III, see section
7.4.4 Constant curve or
constant speed, I, II or III,
and fixed control curve.
See section 7.4.2 Fixed
proportional-pressure
curve
See also section 10.2 Guide to performance curves.
TM06 8816 1217
Q
H
Q
H
System type
Pump setting
Recommended Alternative
Underfloor
heating
system
Underfloor heating
mode
Constant curve or constant
speed, I, II or III. See
section 7.4.4 Constant
curve or constant speed, I,
II or III
See also section 10.2 Guide to performance curves.
TM06 8822 1217
System type
Pump setting
Recommended Alternative
One-pipe
heating
system
Constant curve or
constant speed, I, II or III.
See section
7.4.4 Constant curve or
constant speed, I, II or III
Underfloor heating
mode. See section
7.4.3 Underfloor
heating mode
See also section 10.2 Guide to performance curves.
Q
H

English (GB)
11
7.4.6 Pump setting for domestic hot-water systems
Recommended and alternative pump settings:
Factory setting: Radiator heating mode. See section
7.4.1 Radiator heating mode.
7.4.7 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.
7.4.8 Externally controlled signal connection: PWM input
signal profile A (heating)
The ALPHA1 L can be controlled via a digital low-voltage
pulse-width modulation (PWM) signal.
The circulator runs on constant speed curves depending on the
PWM input signal. The speed decreases when the PWM value
increases. If PWM equals 0, the circulator runs at maximum
speed.
Fig. 15 PWM input signal profile A (heating)
At high PWM signal percentages (duty cycles), a hysteresis
prevents the circulator from starting and stopping if the input
signal fluctuates around the shifting point.
At low PWM signal percentages, the circulator speed is high for
safety reasons. In case of a cable breakage in a gas boiler
system, the circulators will continue to run at maximum speed to
transfer heat from the primary heat exchanger. This is also
suitable for heat circulators to ensure that the circulators transfer
heat in case of a cable breakage.
7.4.9 Setting up the PWM input signal
To enable the external control mode (PWM profile A), you need a
signal cable connected to an external system. The cable can be
supplied with the circulator as an accessory. See section
11. Accessories,
The cable connection has three conductors: signal input, signal
output and signal reference.
Fig. 16 Mini superseal plug
To set the signal connection, do as follows:
1. Make sure that the pump is turned off.
2. The PWM signal connection is covered by a blind plug.
Remove the plug.
3. Connect the signal cable with the mini superseal plug.
4. Turn on the power supply.
5. The pump automatically detects the PWM input signal and
enables the control mode on the pump.
See fig. 17.
Fig. 17 Connecting the signal cable to the ALPHA1 L
System type
Pump setting
Recommended Alternative
Domestic
hot-water
system
Constant curve or
constant speed, I, II or
III. See section
7.4.4 Constant curve or
constant speed, I, II or III
No alternatives
See also section 10.2 Guide to performance curves.
TM06 9136 1617
PWM input signal [%] Pump status
≤10 Maximum speed: max.
> 10 / ≤84 Variable speed: min. to max.
> 84 / ≤91 Minimum speed: IN
> 91/95 Hysteresis area: on/off
> 95 / ≤100 Standby mode: off
PWM input signal [%]
Max.
Speed
PWM input signal
Max.
Speed
The cable must be connected to the control box via a
mini superseal plug. See fig. 16.
TM06 5821 0216TM06 7633 1217
1 x 230 V+ 10 / -15%
∽50/60Hz

English (GB)
12
7.5 Pump performance
7.5.1 Relation between pump setting and pump performance
Figure 18 shows the relation between pump setting and pump
performance by means of curves.
Fig. 18 Pump setting in relation to pump performance
TM06 8818 1217
Setting Pump curve Function
IConstant curve or constant
speed I
The pump runs at a constant speed and consequently on a constant curve.
At speed I, the pump is set to run on the minimum curve under all operating conditions. See
fig. 18.
II Constant curve or constant
speed II
The pump runs at a constant speed and consequently on a constant curve.
At speed II, the pump is set to run on the intermediate curve under all operating conditions.
See fig. 18.
III Constant curve or constant
speed III
The pump runs at a constant speed and consequently on a constant curve.
At speed III, the pump is set to run on the maximum curve under all operating conditions.
See fig. 18.
Quick venting of the pump can be obtained by setting the pump to speed III for a short
period.
Proportional-pressure curve
The duty point of the pump will move up or down on the proportional-pressure curve,
depending on the heat demand in the system. See fig. 18.
The head (pressure) is reduced at falling heat demand and increased at rising heat demand.
Constant-pressure curve
The duty point of the pump will move out or in on the constant-pressure curve, depending on
the heat demand in the system. See fig. 18.
The head (pressure) is kept constant, irrespective of the heat demand.
III
II
I
H
Q

English (GB)
13
8. Setting the product
Every time you press the push-button, the pump setting is
changed. A cycle is five button presses.
To select fixed proportional curve, press and hold the push button
for 3 seconds.
The pump automatically enables the PWM input-signal control
mode when the signal cable is plugged in. For details on setting
up the PWM input signal. See section 7.4.9 Setting up the PWM
input signal.
To learn more about each control mode, see section 7.4 Control
modes.
TM06 7296 1717
3 s.
The pump has been factory-set to radiator heating
mode.

English (GB)
14
9. Fault finding the product
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 in fig. 19.
When there is no active alarm anymore, the control panel
switches back to operating status and the first LED switches from
red to green.
Fig. 19 Fault finding table
9.1 Deblocking the shaft
If the pump is blocked it is necessary to deblock the shaft. The
ALPHA1 L deblocking device is accessible from the front of the
circulator without having to demount the control box. The force of
the device is high enough to deblock circulators, which are seized
by lime, e.g. if the pump has been turned off during summer.
Course of action:
1. Turn off the power supply.
2. Locate the deblocking screw in the centre of the control box.
3. 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 2, if necessary.
5. Turn on the power supply.
Fig. 20 Deblocking the shaft
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.
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.
Alarm status Fault Display Solution
The pump is
blocked.
Deblock the
shaft. See
section
9.1 Deblocking
the shaft.
Supply voltage
is low.
Make sure that
there is sufficient
voltage supply to
the pump.
Electrical error.
Replace the
pump and send
the pump to the
nearest
Grundfos
Service Center.
ON
230 V
No.2
5 mm
<160 V
ON
230 V
ON
TM06 8867 1417
Before, during and after the deblocking, the device is
tight and must not release any water.
No.2
5 mm

English (GB)
15
10. Technical data
To avoid condensation in the control box and stator, the liquid
temperature must always be higher than the ambient
temperature.
Operating conditions
Sound pressure level The sound pressure level of the pump is lower than 43 dB(A)
Relative humidity Maximum 95 %, non-condensing environment
System pressure PN 10: Maximum 1.0 MPa (10 bar)
Inlet pressure
Liquid temperature Minimum inlet pressure
75 °C 0.005 MPa, 0.05 bar, 0.5 m head
95 °C 0.05 MPa, 0.5 bar, 5 m head
Ambient temperature 0-55 °C
Liquid temperature 2-95 °C
Liquid Maximum water/propylene glycol mixture is 50 %
Viscosity Maximum 10 mm2/s
Electrical data
Supply voltage 1 x 230 V - 15 %/+ 10 %, 50/60 Hz, PE
Insulation class F
Miscellaneous data
Motor protection The pump requires no external motor protection.
Enclosure class IPX4D
Temperature class (TF) TF95
Specific EEI values
ALPHA1 L XX-40: EEI ≤0.20
ALPHA1 L XX-60: EEI ≤0.20
ALPHA1 L XX-65: EEI ≤0.23
In domestic hot-water systems, we recommend that
you keep the liquid temperature below 65 °C to
eliminate the risk of lime precipitation.

English (GB)
16
10.1 Dimensions, ALPHA1 L XX-40, XX-60, XX-65
Dimensional sketches and table of dimensions.
Fig. 21 ALPHA1 L XX-40, XX-60, XX-65
TM06 8814 1217
G
H3
H2H1B2B1
L1
L4
L3
Pump type
Dimensions [mm]
L1 L3 L4 B1 B2 H1 H2 H3 G
ALPHA1 L 15-40 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1
ALPHA1 L 15-60 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1
ALPHA1 L 15-65 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1
ALPHA1 L 20-40 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1 1/4
ALPHA1 L 20-40 N 150 90 71.6 48.6 48.8 26.8 102.1 128.9 G 1 1/4
ALPHA1 L 20-60 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1 1/4
ALPHA1 L 20-60 N 150 90 71.6 48.6 48.8 26.8 102.1 128.9 G 1 1/4
ALPHA1 L 25-40 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1 1/2
ALPHA1 L 25-40 180 88.3 71.6 46.3 46.4 25.3 102.1 127.4 G 1 1/2
ALPHA1 L 25-40 A 180 88.3 71.6 31.7 64.7 49.7 112 161.7 G 1 1/2
ALPHA1 L 25-40 N 180 90 71.6 48.6 48.8 26.8 102.1 128.9 G 1 1/2
ALPHA1 L 25-60 130 88.3 71.6 45.9 46.6 25.1 102.1 127.2 G 1 1/2
ALPHA1 L 25-60 180 88.3 71.6 46.3 46.4 25.3 102.1 127.4 G 1 1/2
ALPHA1 L 25-40 A 180 88.3 71.6 31.7 64.7 49.7 112 161.7 G 1 1/2
ALPHA1 L 25-60 N 180 90 71.6 48.6 48.8 26.8 102.1 128.9 G 1 1/2
ALPHA1 L 32-40 180 88.3 71.6 46.3 47.7 26.3 102.1 128.4 G 2
ALPHA1 L 32-60 180 88.3 71.6 46.3 47.7 26.3 102.1 128.4 G 2

English (GB)
17
10.2 Guide to performance curves
Each pump setting has its own performance curve. See fig. 22.
Fig. 22 Performance curves in relation to pump setting
For further information about pump settings, see sections
7. Control functions and 8. Setting the product.
10.3 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 ρ= 998.2 kg/m3and 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 for speeds I, II and III are marked.
• The curves apply to a kinematic viscosity of = 1.004 mm2/s
(1.004 cSt).
• The conversion between head H [m] and differential pressure
ρ[kPa] has been made for water with a temperature of 60 °C,
ρ= 983.2 kg/m3.
• Curves obtained according to EN 16297.
TM06 8818 1217
III
II
I
H
Q
Settling Pump curve
I Constant curve or constant speed I
II Constant curve or constant speed II
III Constant curve or constant speed III
Proportional-pressure curve
Constant-pressure curve

English (GB)
18
10.4 Performance curves, ALPHA1 L XX-40 (N)
Fig. 23 ALPHA1 L XX-40
TM06 8819 1717
Setting P1
[W]
I1
[A]
Min. 3.4 0.05
Max. 25 0.26

English (GB)
19
10.5 Performance curves, ALPHA1 L XX-60 (N)
Fig. 24 ALPHA1 L XX-60
TM06 8820 1717
Setting P1
[W]
I1
[A]
Min. 3.4 0.05
Max. 45 0.42

English (GB)
20
10.6 Performance curves, ALPHA1 L XX-65 (N)
Fig. 25 ALPHA1 L XX-65
TM06 8821 1717
Setting P1
[W]
I1
[A]
Min. 40.05
Max. 60 0.52