GRUNDFOS ALPHA2 Instruction Manual

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ALPHA2

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB) Installation and operating instructions

English (GB)

Original installation and operating instructions

These installation and operating instructions describe ALPHA2. Sections 1-4 give the information necessary to be able to unpack,

install and start up the product in a safe way. Sections 5-12 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 Hazard statements

1.2 Notes

2. Receiving the product

2.1 Inspecting the product

2.2 Scope of delivery

3. Installing the product

3.1 Mechanical installation

3.2 Pump positions

3.3 Control box positions

3.4 Insulating the pump housing

3.5 Electrical installation

3.6 Assembling the plug

4. Starting up the product

4.1 Before startup

4.2 First startup

4.3 Venting the pump

5. Product introduction

5.1 Product description

5.2 Intended use

5.3 Pumped liquids

5.4 Identification

5.5 Accessories

5.6 Insulating shells, ALPHA2

5.7 ALPHA plugs

5.8 ALPHA Reader

6. Control modes

6.1 AUTO

6.2 Proportional-pressure mode

6.3 Constant-pressure mode

6.4 Constant curve/constant speed

6.5 Automatic night setback

6.6 Guide to control mode selection

6.7 Pump performance

7. Setting the product

7.1 Elements on the operating panel

7.2 Display

7.3 Light fields indicating the pump setting

7.4 Button for enabling or disabling of automatic night

7.5 Button for selection of pump setting

7.6 Setting automatic night setback

7.7 Setting manual summer mode

7.8 Dry-running protection

7.9 Using ALPHA Reader

8. Servicing the product

8.1 Dismantling the product

8.2 Dismantling the plug

9. Fault finding the product

9.1 High-torque start

9.2 Fault finding table

10. Technical data

10.1 Dimensions, ALPHA2 XX-40, XX-50, XX-60, XX-80

11. Performance curves

11.1 Guide to performance curves

11.2 Curve conditions

11.3 Performance curves, ALPHA2 XX-40 (N)

11.4 Performance curves, ALPHA2 XX-50 (N)

11.5 Performance curves, ALPHA2 XX-60 (N)

ADAPT

setback

10 11 11 11

12 12 12 12 12 12 13

14 14 14

15 15 15 15 15 16

17 17

18 18

21 21 22 23 24

11.6 Performance curves, ALPHA2 XX-80 (N)

12. Disposing of the product

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,

2 3

3 3

1. General information

1.1 Hazard statements

4 5

The symbols and hazard statements below may appear in

Grundfos installation and operating instructions, safety

instructions and service instructions.

7 7 7

8 8 8 9

The hazard statements are structured in the following way:

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.

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.

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

5.4.2 Nameplate.

2.2 Scope of delivery

The box contains the following items:

• ALPHA2 pump

• ALPHA plug

• insulating shells

•two gaskets

• quick guide.

3. Installing the product

WARNING

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

Crushing of feet

Minor or moderate personal injury

- Wear safety shoes when opening the box and handling the product.

English (GB)

The pump must always be installed with a horizontal motor shaft within ± 5 °.

3.1 Mechanical installation

English (GB)

3.1.1 Mounting the product

The arrows on the pump housing indicate the flow direction through the pump. See fig.

1. Fit the two gaskets supplied with the pump when you mount the pump in the pipe. See fig.

2. Install the pump with a horizontal motor shaft within ± 5 °. See

1 (C). See also section 3.2 Pump positions.

fig.

3. Tighten the fittings.

1 (A).

1 (B).

3.2 Pump positions

Fig. 2 Control box positions

Always install the pump with a horizontal motor shaft.

• Pump installed correctly in a vertical pipe. See fig.

• Pump installed correctly in a horizontal pipe. See fig. 2 (B).

• Do not install the pump with a vertical motor shaft. See fig. 2 (C and D).

2 (A).

3.3 Control box positions

3.3.1 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.

TM07 4605 2119TM07 4606 2119

Fig. 1 Mounting ALPHA2

Fig. 3 Control box positions, heating and domestic hot-water

systems

TM07 1193 2119

3.3.2 Positioning the control box in air-conditioning and

cold-water systems

Position the control box with the plug pointing downwards. See fig.

Fig. 4 Control box position, air-conditioning and cold-water

systems

3.3.3 Changing the control box position

WARNING

Pressurised system

Death or serious personal injury

- Tighten the bolts before opening the isolating valves. The pumped liquid may be scalding hot and under high pressure.

3.4 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.

TM07 4607 2119

Do not insulate the control box or cover the operating panel.

English (GB)

TM07 4604 2119

If you change the position of the control box, fill the system with the liquid to be pumped or open the isolating valves.

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.

Fig. 5 Changing the control box position

TM07 4608 2119

3.5 Electrical installation

12 mm 17 mm

7 mm

Ø 5.5 - 10 mm

0.5 - 1.5 mm

English (GB)

WARNING

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.

WARNING

Electric shock

Death or serious personal injury

- Connect the pump to earth.

WARNING

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;

WARNING

Electric shock

Death or serious personal injury

- All electrical connections must be carried out by a qualified electrician in accordance with local regulations.

• The pump requires no external motor protection.

• Check that the supply voltage and frequency correspond to the values stated on the nameplate. See section

5.4.2 Nameplate.

• Connect the pump to the power supply with the plug supplied with the pump. See steps 1 to 7.

Step Action Illustration

Bend the cable with the cable

conductors pointing upwards.

Pull out the conductor guide

plate and throw it away.

Click the plug

cover onto the power supply plug.

Screw the cable

gland onto the power supply plug.

TM05 5540 3812

TM05 5541 3812

TM05 5542 3812

TM05 5543 3812

3.6 Assembling the plug

Step Action Illustration

Fit the cable gland and plug cover to the cable. Strip the

cable conductors as illustrated.

Connect the cable

conductors to the power supply plug.

Insert the power supply plug into the male plug in

the pump control box.

TM05 5538 3812

TM07 1194 1118

TM05 5539 3812

4. Starting up the product

1 x 230 V ± 10 % ~ 50/60 Hz

0/O

1/On

30 min

WARNING

Pressurised system

Death or serious personal injury

- Tighten the bolts before opening the isolating valves. The pumped liquid may be scalding hot and under high pressure.

4.1 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 instructions on how to vent the system, see section

the pump

4.2 First startup

After 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.

The pump is factory set to AUTO

ADAPT

10. Technical data. For

4.3 Venting

4.3 Venting the pump

English (GB)

Fig. 7 Starting up 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.

TM07 4603 2119

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. 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. See

6. Control modes.

section

The pump must not run dry.

You cannot vent the system through the pump. See section

5. Product introduction.

TM07 462 21191

5. Product introduction

English (GB)

5.1 Product description

The pump is designed for circulating liquids in systems with variable flow rates where it is desirable to optimise the setting of the pump duty point to reduce energy costs.

The table below shows the ALPHA2 models with built-in functions and features.

Comparison of ALPHA2 models according to built-in functions and features

Functions/features ALPHA2 model B ALPHA2 model C ALPHA2 model D ALPHA2 model E

Starts from PC 12xx* PC 14xx* PC 15xx* PC 17xx* AUTO

ADAPT

Proportional pressure ● ● ● ● Constant pressure ● ● ● ● Constant curve ● ● ● ● Automatic night setback ● ● ● ● Manual summer mode ● ● ● Dry-running protection ●● ALPHA Reader compatible ● High-torque start ●● ALPHA2XX-40 ● ● ● ● ALPHA2XX-50 ● ● ● ● ALPHA2XX-60 ● ● ● ● ALPHA2XX-80 ● ● ●

* Production code (Year-Week).

●●● ●

5.2 Intended use

The pump is designed for circulating liquids in heating and air-conditioning systems with temperatures equal to or higher than 2 °C. You can also use pumps with stainless-steel pump housing in domestic hot-water systems.

5.3 Pumped liquids

The pump is suitable for the following liquids:

• clean, thin, non-aggressive and non-explosive liquids, not containing solid particles or fibres

• cooling liquids, not containing mineral oil

• softened water.

The kinematic viscosity of water is 1 mm 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 section

models according to built-in functions and features

/s (1 cSt) at 20 °C. If the

Comparison of ALPHA2

5.4 Identification

P1 (W) MPaI1/1 (A)

Min. Max.

((,;;3DUW;

;;;9a;;+],3;;;7);;;

61;;;;;;;;

0RGHO;;;;;;;

MADE IN DENMARK

;;;

;;;;;;;;

31;;;;;;;;

3&;;;;

*UXQGIRV+ROGLQJ$6

'.%MHUULQJEUR'HQPDUN

5.4.1 Model type

These installation and operating instructions cover ALPHA2 model B, C, D and E. The model type is stated on the packaging and nameplate. See figs

Fig. 9 Model type on the packaging

9 and 10.

5.4.2 Nameplate

TM06 45820 2515TM06 1716 2614

Fig. 11 Nameplate

Pos. Description

1 Minimum rated current [A] 2 Maximum rated current [A] 3 CE mark and approvals 4 EEI: Energy Efficiency Index 5 Voltage [V] 6 Product number 7 Serial number 8 Pump model

9 Country of origin 10 Data matrix code 11 Frequency [Hz]

Production code:

• 1st and 2nd figures: year

• 3rd and 4th figures: week 13 Temperature class 14 Enclosure class 15 Crossed-out wheeled bin according to EN 50419 16 Maximum system pressure [MPa] 17 Minimum input power P1 [W] 18 Maximum input power P1 [W]

English (GB)

TM05 3079 0912

5.4.3 Type key

Example ALPHA2 25 -40 N 180

Pump type [ ]: Standard version

Nominal diameter (DN) of inlet and outlet ports [mm]

Maximum head [dm]

Fig. 10 Model type on the nameplate

[ ]: Cast-iron pump housing A: Pump housing with air separator N: Stainless-steel pump housing

Port-to-port length [mm]

5.5 Accessories

Rc Rp R

English (GB)

5.5.1 Unions and valve kits

Union nut with internal

threads

Union nut with

external threads

Product numbers, unions

Ball valve with internal

threads

Ball valve with

compression fitting

Union nut with soldering fitting

ALPHA2

15-xx*

15-xx N*

25-xx

25-xx N 529971 529972 519805 519806 519807 519808 519809 529977 529978 529979

32-xx N 509971 529995

G 1 1/2

32-xx

3/4 1 1 1/4 1 1 1/4 3/4 1 1 1/4 ∅22 ∅28 ∅18 ∅22 ∅28 ∅42

Connection

G 1

529921 529922 529821 529925 529924

G 2

509921 509922

Note: The product numbers are always for one complete set, including gaskets. 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 10226-1 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. See fig.

12.

Fig. 12 G-threads and R-threads

TM06 9235 2017

5.6 Insulating shells, ALPHA2

123

213, 4

The pump is supplied with two insulating shells. Type A pumps with air-separating chamber are not supplied with insulating shells. However, you can order insulating shells as an accessory. See table below.

The insulation thickness of the insulating shells corresponds to the nominal diameter of the pump.

The insulating shells, which are tailored to the individual pump type, enclose the entire pump housing. The insulating shells are easy to fit around the pump. See fig.

Pump type Product number

ALPHA2 XX-XX 130 98091786 ALPHA2 XX-XX 180 98091787

Fig. 13 Insulating shells

13.

5.8 ALPHA Reader

The ALPHA Reader is the receiver and transmitter of pump real time performance data.

The unit uses a CR2032 lithium battery. The unit is together with the Grundfos GO Balance app used for

balancing heating systems primarily in one- and two-family houses. The app is available for both Android and iOS devices, and you can download it free of charge from Google Play and App Store.

Description Product number

ALPHA Reader MI401 98916967

For further information, see section

TM07 4604 2119

7.9 Using ALPHA Reader.

English (GB)

TM06 8574 1517

5.7 ALPHA plugs

Fig. 14 ALPHA plugs

Pos. Description

ALPHA straight plug, standard plug

connector, complete ALPHA angle plug, standard angle plug

connection, complete ALPHA plug, 90 ° bend to the left,

including 4 m cable ALPHA plug, 90 ° bend to the left,

including 1 m cable and integrated NTC protection resistor*

* This special cable with an active built-in NTC protection circuit

reduces possible inrush currents. To be used in case of for instance poor quality of relay components that are sensitive to inrush current.

Product number

98284561

98610291

96884669

97844632

TM06 5823 0216

6. Control modes

PP3

PP2

PP1

CP3

CP2

CP1

English (GB)

6.1 AUTO

In AUTO control. AUTO systems. See section

AUTO operating conditions, meaning that the pump performance is

ADAPT

mode, the pump is set to proportional-pressure

ADAPT

is recommended for two-pipe heating

ADAPT

6.6 Guide to control mode selection.

selects the best control curve under the given

automatically adjusted to the actual heat demand, that is the size of the system and the changing heat demand over time, by continuously selecting a proportional-pressure curve.

You cannot expect an optimum pump setting from day one. If the power supply fails or is disconnected, the pump stores the AUTO automatic adjustment when the power supply has been restored.

setting in an internal memory and resumes the

ADAPT

The pump is factory set to AUTO

ADAPT

6.2 Proportional-pressure mode

Proportional-pressure control adjusts the pump performance to the actual heat demand in the system, but the pump performance follows the selected performance curve, PP1, PP2 or PP3. See fig.

15 where PP2 has been selected. The selection of the

proportional-pressure setting depends on the characteristics of the heating system and the actual heat demand.

Fig. 15 Three proportional-pressure curves

6.3 Constant-pressure mode

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. been selected. The selection of the constant-pressure setting depends on the characteristics of the heating system and the actual heat demand.

Fig. 16 Three constant-pressure curves

16 where CP1 has

6.4 Constant curve/constant speed

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.

17 where II has been

selected. The selection of the constant-curve/constant-speed setting depends on the characteristics of the heating system and the number of taps likely to be opened at the same time.

TM05 3068 0912

Fig. 17 Three constant curve/constant speed settings

6.5 Automatic night setback

With automatic night setback enabled the pump automatically changes between normal operation and the automatic night setback curve.

The pump changes to automatic night setback when a flow-pipe temperature drop of more than 10 to 15 °C within approximately two hours is registered. The temperature drop must be at least

0.1 °C/min. Changeover to normal operation takes place without a time lag

when the flow-pipe temperature has increased by approximately 10 °C. You do not have to re-enable automatic night setback if the power supply has been switched off.

If the power supply is switched off when the pump is running on the curve for automatic night setback, the pump starts in normal operation. The pump changes back to the curve for automatic night setback when the condition for automatic night setback is fulfilled again.

TM05 3064 0912TM05 3066 0912

If there is insufficient heat in the heating system, check whether automatic night setback has been enabled. If yes, disable the function.

6.6 Guide to control mode selection

ADAPT

Pump setting

Proportional-pressure

curve, PP1, PP2 or PP3

Constant-pressure curve

CP1, CP2 or CP3

Constant curve/constant

speed, I, II or III

Constant-pressure curve,

CP1, CP2 or CP3

System type

Recommended Alternative

Two-pipe

heating

AUTO

system

One-pipe

heating system

Underfloor

heating system

Domestic hot water system

Constant

curve/constant

speed, I, II or III

Constant-pressure

curve, CP1, CP2 or

CP3

Constant

curve/constant

speed, I, II or III

6.6.1 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.

6.7 Pump performance

III

PP3

CP3

CP2

PP1

CP1

PP2

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.

Relation between pump setting and pump performance. Figure

18 shows the relation between pump setting and pump performance by means of curves. See also section 11. Performance

curves

English (GB)

Fig. 18 Pump setting in relation to pump performance

Setting Pump curve Function

AUTO factory setting

PP1

PP2

PP3

CP1

CP2

CP3

ADAPT

Highest to lowest proportional-pressure curve

Lowest proportional-pressure curve

Intermediate proportional-pressure curve

Highest proportional-pressure curve

Lowest constant-pressure curve

Intermediate constant-pressure curve

Highest constant-pressure curve

The AUTO within a defined performance range. See fig.

• Adjusting the pump performance to the size of the system.

• Adjusting the pump performance to the variations in load over time. In AUTO

The duty point of the pump will move up or down on the lowest proportional-pressure curve, depending on the heat demand. See fig. The head is reduced at falling heat demand and increased at rising heat demand.

The duty point of the pump will move up or down on the intermediate proportional-pressure curve, depending on the heat demand. See fig. The head is reduced at falling heat demand and increased at rising heat demand.

The duty point of the pump will move up or down on the highest proportional-pressure curve, depending on the heat demand. See fig. The head is reduced at falling heat demand and increased at rising heat demand.

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. The head is kept constant, irrespective of the heat demand.

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. The head is kept constant, irrespective of the heat demand.

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. The head is kept constant, irrespective of the heat demand.

ADAPT

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

18.

III Speed III

fig. You obtain quick venting of the pump by setting the pump to speed III for a short period. See section

II Speed II

4.3 Venting the pump.

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. 18.

The pump runs on a constant curve which means that it runs at a constant speed.

I Speed I

Automatic night setback or manual

In speed I, the pump is set to run on the minimum curve under all operating conditions. See

18.

fig. The pump changes to the curve for automatic night setback, provided that certain conditions are

met.

summer mode

function enables the pump to control the pump performance automatically

18.

, the pump is set to proportional-pressure control.

18.

TM05 2771 2817

7. Setting the product

English (GB)

WARNING

Hot surface

Death or serious personal injury

- The pump housing may be hot due to the pumped liquid being scalding hot. Touch only the operating panel.

7.1 Elements on the operating panel

7.3 Light fields indicating the pump setting

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.

The pump has ten performance settings which you can select with the button (5). See fig.

The pump setting is indicated by nine light fields in the display. See fig.

20.

Fig. 20 Nine light fields

19.

TM05 3061 0912

Fig. 19 Operating panel

Pos. Description

Display showing the actual power consumption in

watt or the actual flow rate in m3/h. Light fields indicating the pump setting.

See section

setting

Light field indicating the status of automatic night

setback and manual summer mode. Button for enabling or disabling of automatic night

setback and manual summer mode.

7.3 Light fields indicating the pump

5 Button for selection of pump setting.

Button for selection of parameter to be shown in the display, i.e. actual power consumption in watt or actual flow rate in m3/h. The button is also used to activate the ALPHA

Reader mode on the pump. See section

7.9.1 Activating and deactivating the ALPHA Reader

mode on the pump

7 Connectivity symbol.

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 or the actual flow rate in m3/h in steps of 0.1 m3/h during operation.

Faults preventing the pump from operating properly, for example a blocked rotor, are indicated in the display by fault codes. See

9. Fault finding the product.

section If a fault is indicated, correct the fault and reset the pump by

switching the power supply off and on.

Button

presses

TM07 4600 2119

Active light fields Description

Factory setting

AUTO

Lowest proportional-pressure

ADAPT

curve, PP1

Intermediate proportional-pressure curve, PP2

Highest proportional-pressure curve, PP3

Lowest constant-pressure curve, CP1

Intermediate constant-pressure curve, CP2

Highest constant-pressure curve, CP3

Constant curve

For information about the function of the settings, see section

6. Control modes.

7.4 Button for enabling or disabling of automatic night setback

The button enables and disables automatic night setback. See fig.

19 (4).

Automatic night setback is only relevant for heating systems prepared for this function. See section

product

9. Fault finding the

The light field is on when automatic night setback is active. See fig.

19 (3).

Factory setting: automatic night setback is not active. If you have set the pump to speed I, II or III, you cannot select

automatic night setback.

7.5 Button for selection of pump setting

Every time you press the button , the pump setting is changed. See fig.

A cycle is ten button presses. See section 7.3 Light fields

indicating the pump setting

19 (5).

7.6 Setting automatic night setback

If you select speed I, II or III, automatic night setback is disabled. You do not have to re-enable automatic night setback if the power

supply has been switched off. If the power supply is switched off when the pump is running on

the curve for automatic night setback, the pump starts in normal operation. See section

The pump changes back to the curve for automatic night setback when the condition for automatic night setback is fulfilled again. See section

7.7 Setting manual summer mode.

If there is insufficient heat in the heating system, check whether automatic night setback has been enabled. If yes, disable the function.

To ensure the optimum function of automatic night setback, the following conditions must be fulfilled:

• The pump must be installed in the flow pipe. See fig.

• The boiler must incorporate automatic control of the liquid

temperature.

Do not use automatic night setback when the pump is installed in the return pipe of the heating system.

9. Fault finding the product.

21.

7.7 Setting manual summer mode

Manual summer mode is available as from ALPHA2 model C. In manual summer mode, the pump is stopped to save energy. To

avoid lime precipitation and blocking of the pump, the pump is started frequently in a short period. This is an alternative to shutting down the pump if there is a risk of lime deposit.

There is a risk of lime deposit in case of a long standstill period.

In manual summer mode, the pump starts frequently at low speed to avoid blocking the rotor. The display is turned off.

If any alarms occur during manual summer mode, no alarms will be shown. When manual summer mode is deactivated again, only the actual alarms will be displayed.

If the automatic night setback mode is enabled before setting the manual summer mode, the pump will return to automatic night setback mode after manual summer mode.

7.7.1 Activating manual summer mode

Activate the manual summer mode by pressing the automatic night setback button 3 to 10 seconds. See fig.

23. The green light

field flashes quickly. After a short while the display turns off and the green light field flashes slowly.

Fig. 22 Automatic night setback button

7.7.2 Deactivating manual summer mode

Deactivate the manual summer mode by pressing any of the buttons. Then the pump returns to the previous mode and setting.

7.8 Dry-running protection

The dry-running protection protects the pump against dry running during start and normal operation. See section

product

During first startup and in case of dry running, the pump will operate for 30 minutes before stopping. During this period the pump displays the error code "E4 - "- -"".

Dry-running protection is available as from ALPHA2 model D.

9. Fault finding the

English (GB)

TM05 3149 1112

Fig. 21 Automatic night setback conditions

Enable automatic night setback by pressing . See section

7.4 Button for enabling or disabling of automatic night setback.

Light in means that automatic night setback is active.

TM06 1251 2014

7.9 Using ALPHA Reader

English (GB)

Fig. 23 ALPHA Reader

The ALPHA Reader is compatible as from ALPHA2 model E. A connectivity symbol on the pump indicates compatibility with the ALPHA Reader. See

23.

fig.

The ALPHA Reader provides safe readout of internal data from the pump to an Android or iOS-based device via Bluetooth.

The unit is together with the Grundfos GO Balance app used for balancing heating systems primarily in one- and two-family houses. The app guides you through a number of steps where information on installation and measurements from the pump is being collected. In a two-pipe radiator heating system or an underfloor heating system, the app calculates the balancing values for each of the valves. On the basis of these values, the app guides you through the adjustment of each presetting valve in the system.

For further information on how to set the ALPHA Reader and perform hydronic balancing, see the ALPHA Reader documentation in Grundfos Product Center on www.grundfos.com.

7.9.1 Activating and deactivating the ALPHA Reader mode on the pump

1. Press [W/m

/h] and hold it for 3 seconds.

2. ALPHA Reader is either activated or deactivated, depending

on the previous state. When ALPHA Reader is active, the unit indicator in the display [W/m

/h] flashes rapidly.

TM06 4452 2315

You can activate and deactivate the ALPHA Reader mode in all pump modes.

See separate installation and operating instructions for further information on how to use the ALPHA Reader.

8. Servicing the product

8.2 Dismantling the plug

WARNING

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

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. Slowly loosen the screws and unpressurise the system. The pumped liquid may be scalding hot and under high pressure.

WARNING

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.

WARNING

Hot liquid

Death or serious personal injury

CAUTION

Crushing of feet

Minor or moderate personal injury

- Wear safety shoes when handling the product.

CAUTION

Sharp element

Minor or moderate personal injury

- Use protective gloves when servicing the product.

Step Action Illustration

Loosen the cable

gland and remove it from the plug.

Pull off the plug cover

while pressing on both sides.

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.

English (GB)

TM05 5545 3812

TM05 5546 3812

TM05 5547 3812

8.1 Dismantling the product

1. Switch off the power supply.

2. Pull out the plug. For instructions on how to dismantle the plug, see section

3. Close the two isolating valves on both sides of the pump.

4. Loosen the fittings.

5. Remove the pump from the system.

8.2 Dismantling the plug.

The plug has now

been removed from the power supply plug.

TM05 5548 3812

9. Fault finding the product

English (GB)

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.

WARNING

Electric shock

Death or serious personal injury

- A damaged product must be repaired by Grundfos or a service workshop authorised by Grundfos.

9.1 High-torque start

If the shaft is blocked and you cannot start the pump, the display indicates the alarm "E1 - "- -"", with a delay of 30 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. High-torque start is available as from ALPHA2 model D.

WARNING

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.

9.2 Fault finding table

Fault Operating panel Cause Remedy

1. The pump does not run.

2. Noise in the system. No warning is indicated

3. Noise in the pump. No warning is indicated

4. Insufficient heat. No warning is indicated

Light off. a) A fuse in the installation is blown. Replace the fuse.

b) The current-operated or

voltage-operated circuit breaker has tripped.

c) The pump is defective. Replace the pump.

Changes between "- -" and "E 1".

Changes between "- -" and "E 2".

Changes between "- -" and "E 3".

Changes between "- -" and "E 4".

on the display.

a) The rotor is blocked.

a) Insufficient supply voltage. Make sure that the supply voltage falls

a) Electrical fault.

a) Dry-running protection. Make sure that there is sufficient liquid in

a) Air in the system. Vent the system.

b) The flow rate is too high. Reduce the suction head. a) Air in the pump. Let the pump run. The pump vents itself

b) The inlet pressure is too low. Increase the inlet pressure, or make

a) The pump performance is too low. Change the pump setting to increase the

Cut in the circuit breaker.

Remove the impurities.

within the specified range.

Replace the pump.

the pipe system. Reset the warning by pressing any button or switch off the power supply.

See section

over time.

sure that the air volume in the expansion tank is sufficient, if installed.

pump performance. See section

6.6.1 Changing from recommended to alternative pump setting

4.3 Venting the pump.

10. Technical data

Operating conditions

Relative humidity Maximum 95 % RH System pressure Maximum 1.0 MPa, 10 bar, 102 m head

Liquid temperature Minimum inlet pressure

Inlet pressure

Sound pressure level The sound pressure level of the pump is lower than 43 dB(A). Ambient temperature 0-40 °C Surface temperature The maximum surface temperature will not exceed 125 °C. Liquid temperature 2-110 °C

Electrical data

Supply voltage 1 x 230 V ± 10 %, 50/60 Hz, PE Insulation class F Power consumption in

manual summer mode

Miscellaneous data

Motor protection The pump requires no external motor protection. Temperature class TF110 to EN 60335-2-51 Enclosure class IPX4D

Specific EEI values

To avoid condensation in the control box and stator, the liquid temperature must always be higher than the ambient temperature.

≤ 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

< 0.8 watt

ALPHA2 XX-40: EEI ≤ 0.15 ALPHA2 XX-50: EEI ≤ 0.16 ALPHA2 XX-60: EEI ≤ 0.17 ALPHA2 XX-80: EEI ≤ 0.18

English (GB)

Ambient temperature

[°C]

02 10 10 20 20 30 30 35 35 40 40

The pump can run at ambient temperatures slightly higher than the liquid temperature if the plug connection in the pump head is pointing downwards.

Minimum liquid temperature

[°C]

10.1 Dimensions, ALPHA2 XX-40, XX-50, XX-60, XX-80

English (GB)

Dimensional sketches and table of dimensions.

TM05 2364 5011

Pump type

L1 B1 B2 B3 B4 H1 H2 H3 G

ALPHA2 15-40 130 130 54 54 44 44 36 104 47 G 1 ALPHA2 15-50 130 130 54 54 44 44 36 104 47 G 1* ALPHA2 15-60 130 130 54 54 44 44 36 104 47 G 1* ALPHA2 15-80 130 130 54 54 44 44 36 104 47 G 1 ALPHA2 25-40 130 130 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-40 N 130 130 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 25-50 130 130 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-50 N 130 130 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 25-60 130 130 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-60 N 130 130 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 25-80 130 130 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-80 N 130 130 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 25-40 180 180 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-40 N 180 180 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 25-50 180 180 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-50 N 180 180 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 25-60 180 180 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-60 N 180 180 54 54 44 44 3 104 47 G 1 1/2 ALPHA2 25-80 180 180 54 54 44 44 36 104 47 G 1 1/2 ALPHA2 25-80 N 180 180 54 54 44 44 37 104 47 G 1 1/2 ALPHA2 32-40 180 180 54 54 44 44 36 104 47 G 2 ALPHA2 32-40 N 180 180 54 54 44 44 37 104 47 G 2 ALPHA2 32-50 180 180 54 54 44 44 36 104 47 G 2 ALPHA2 32-50 N 180 180 54 54 44 44 37 104 47 G 2 ALPHA2 32-60 180 180 54 54 44 44 36 104 47 G 2 ALPHA2 32-60 N 180 180 54 54 44 44 37 104 47 G 2 ALPHA2 32-80 180 180 54 54 44 44 36 104 47 G 2 ALPHA2 32-80 N 180 180 54 54 44 44 37 104 47 G 2

Dimensions

11. Performance curves

11.1 Guide to performance curves

Each pump setting has its own performance curve. However, AUTO

A power curve, P1, belongs to each performance curve. The power curve shows the pump power consumption in watt at a given performance curve.

11.2 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 ρ = 983.2 kg/m3 and 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).

• 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 16297-2.

covers a performance range.

ADAPT

English (GB)

11.3 Performance curves, ALPHA2 XX-40 (N)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

Q [m³/h]

[m]

III

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

Q [m³/h]

[W]

III

PP1

CP1

PP2

CP2

PP3

CP3

English (GB)

Setting

AUTO

ADAPT

Min. 30.04

Max. 18 0.18

[W]

3-18 0.04 - 0.18

1/1

[A]

TM05 1672 4111

11.4 Performance curves, ALPHA2 XX-50 (N)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8

Q [m³/h]

[m]

III

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8

Q [m³/h]

[W]

III

PP1

CP1

PP3

CP3

CP2

PP2

English (GB)

Setting

AUTO

ADAPT

Min. 30.04

Max. 26 0.24

[W]

3-26 0.04 - 0.24

1/1

[A]

TM05 1673 4111

11.5 Performance curves, ALPHA2 XX-60 (N)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0

Q [m³/h]

III

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0

Q [m³/h]

[W]

III

[m]

PP1

CP1

CP3

CP2

PP2

PP3

English (GB)

Setting

AUTO

ADAPT

Min. 30.04

Max. 34 0.32

[W]

3-34 0.04 - 0.32

1/1

[A]

TM05 1674 4111

11.6 Performance curves, ALPHA2 XX-80 (N)

PP1

CP1

PP2

CP2

PP3

CP3

[m]

[W]

Q [m³/h]

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6

English (GB)

Setting

AUTO

ADAPT

Min. 30.04

Max. 50 0.44

[W]

3-50 0.04 - 0.44

1/1

[A]

12. Disposing of the product

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.

The crossed-out wheelie bin symbol on a product means that it must be disposed of separately from household waste. When a product marked with this symbol reaches its end of life, take it to a collection

point designated by the local waste disposal authorities. The separate collection and recycling of such products will help protect the environment and human health.

See also end-of-life information at www.grundfos.com/product-recycling.

TM06 1285 2114

Argentina

Bombas GRUNDFOS de Argentina S.A. Ruta Panamericana km. 37.500 Centro Industrial Garin 1619 Garín Pcia. de B.A. Phone: +54-3327 414 444 Telefax: +54-3327 45 3190

Australia

GRUNDFOS Pumps Pty. Ltd. P.O. Box 2040 Regency Park South Australia 5942 Phone: +61-8-8461-4611 Telefax: +61-8-8340 0155

Austria

GRUNDFOS Pumpen Vertrieb Ges.m.b.H. Grundfosstraße 2 A-5082 Grödig/Salzburg Tel.: +43-6246-883-0 Telefax: +43-6246-883-30

Belgium

N.V. GRUNDFOS Bellux S.A. Boomsesteenweg 81-83 B-2630 Aartselaar Tél.: +32-3-870 7300 Télécopie: +32-3-870 7301

Belarus

Представительство ГРУНДФОС в Минске 220125, Минск ул. Шафарнянская, 11, оф. 56, БЦ «Порт» Тел.: +7 (375 17) 286 39 72/73 Факс: +7 (375 17) 286 39 71 E-mail: minsk@grundfos.com

Bosnia and Herzegovina

GRUNDFOS Sarajevo Zmaja od Bosne 7-7A, BH-71000 Sarajevo Phone: +387 33 592 480 Telefax: +387 33 590 465 www.ba.grundfos.com e-mail: grundfos@bih.net.ba

Brazil

BOMBAS GRUNDFOS DO BRASIL Av. Humberto de Alencar Castelo Branco, 630 CEP 09850 - 300 São Bernardo do Campo - SP Phone: +55-11 4393 5533 Telefax: +55-11 4343 5015

Bulgaria

Grundfos Bulgaria EOOD Slatina District Iztochna Tangenta street no. 100 BG - 1592 Sofia Tel. +359 2 49 22 200 Fax. +359 2 49 22 201 email: bulgaria@grundfos.bg

Canada

GRUNDFOS Canada Inc. 2941 Brighton Road Oakville, Ontario L6H 6C9 Phone: +1-905 829 9533 Telefax: +1-905 829 9512

China

GRUNDFOS Pumps (Shanghai) Co. Ltd. 10F The Hub, No. 33 Suhong Road Minhang District Shanghai 201106 PRC Phone: +86 21 612 252 22 Telefax: +86 21 612 253 33

COLOMBIA

GRUNDFOS Colombia S.A.S. Km 1.5 vía Siberia-Cota Conj. Potrero Chico, Parque Empresarial Arcos de Cota Bod. 1A. Cota, Cundinamarca Phone: +57(1)-2913444 Telefax: +57(1)-8764586

Croatia

GRUNDFOS CROATIA d.o.o. Buzinski prilaz 38, Buzin HR-10010 Zagreb Phone: +385 1 6595 400 Telefax: +385 1 6595 499 www.hr.grundfos.com

GRUNDFOS Sales Czechia and Slovakia s.r.o.

Čajkovského 21 779 00 Olomouc Phone: +420-585-716 111

Denmark

GRUNDFOS DK A/S Martin Bachs Vej 3 DK-8850 Bjerringbro Tlf.: +45-87 50 50 50 Telefax: +45-87 50 51 51 E-mail: info_GDK@grundfos.com www.grundfos.com/DK

Estonia

GRUNDFOS Pumps Eesti OÜ Peterburi tee 92G 11415 Tallinn Tel: + 372 606 1690 Fax: + 372 606 1691

Finland

OY GRUNDFOS Pumput AB Trukkikuja 1 FI-01360 Vantaa Phone: +358-(0) 207 889 500

France

Pompes GRUNDFOS Distribution S.A. Parc d’Activités de Chesnes 57, rue de Malacombe F-38290 St. Quentin Fallavier (Lyon) Tél.: +33-4 74 82 15 15 Télécopie: +33-4 74 94 10 51

Germany

GRUNDFOS GMBH Schlüterstr. 33 40699 Erkrath Tel.: +49-(0) 211 929 69-0 Telefax: +49-(0) 211 929 69-3799 e-mail: infoservice@grundfos.de Service in Deutschland: e-mail: kundendienst@grundfos.de

Greece

GRUNDFOS Hellas A.E.B.E. 20th km. Athinon-Markopoulou Av. P.O. Box 71 GR-19002 Peania Phone: +0030-210-66 83 400 Telefax: +0030-210-66 46 273

Hong Kong

GRUNDFOS Pumps (Hong Kong) Ltd. Unit 1, Ground floor Siu Wai Industrial Centre 29-33 Wing Hong Street & 68 King Lam Street, Cheung Sha Wan Kowloon Phone: +852-27861706 / 27861741 Telefax: +852-27858664

Hungary

GRUNDFOS Hungária Kft. Tópark u. 8 H-2045 Törökbálint, Phone: +36-23 511 110 Telefax: +36-23 511 111

India

GRUNDFOS Pumps India Private Limited 118 Old Mahabalipuram Road Thoraipakkam Chennai 600 096 Phone: +91-44 2496 6800

Indonesia

PT. GRUNDFOS POMPA Graha Intirub Lt. 2 & 3 Jln. Cililitan Besar No.454. Makasar, Jakarta Timur ID-Jakarta 13650 Phone: +62 21-469-51900 Telefax: +62 21-460 6910 / 460 6901

Ireland

GRUNDFOS (Ireland) Ltd. Unit A, Merrywell Business Park Ballymount Road Lower Dublin 12 Phone: +353-1-4089 800 Telefax: +353-1-4089 830

Italy

GRUNDFOS Pompe Italia S.r.l. Via Gran Sasso 4 I-20060 Truccazzano (Milano) Tel.: +39-02-95838112 Telefax: +39-02-95309290 / 95838461

Japan

GRUNDFOS Pumps K.K. 1-2-3, Shin-Miyakoda, Kita-ku, Hamamatsu 431-2103 Japan Phone: +81 53 428 4760 Telefax: +81 53 428 5005

Korea

GRUNDFOS Pumps Korea Ltd. 6th Floor, Aju Building 679-5 Yeoksam-dong, Kangnam-ku, 135-916 Seoul, Korea Phone: +82-2-5317 600 Telefax: +82-2-5633 725

Latvia

SIA GRUNDFOS Pumps Latvia Deglava biznesa centrs Augusta Deglava ielā 60, LV-1035, Rīga, Tālr.: + 371 714 9640, 7 149 641 Fakss: + 371 914 9646

Lithuania

GRUNDFOS Pumps UAB Smolensko g. 6 LT-03201 Vilnius Tel: + 370 52 395 430 Fax: + 370 52 395 431

Malaysia

GRUNDFOS Pumps Sdn. Bhd. 7 Jalan Peguam U1/25 Glenmarie Industrial Park 40150 Shah Alam Selangor Phone: +60-3-5569 2922 Telefax: +60-3-5569 2866

Mexico

Bombas GRUNDFOS de México S.A. de C.V. Boulevard TLC No. 15 Parque Industrial Stiva Aeropuerto Apodaca, N.L. 66600 Phone: +52-81-8144 4000 Telefax: +52-81-8144 4010

Netherlands

GRUNDFOS Netherlands Velu wezo om 35 1326 AE Almere Postbus 22015 1302 CA ALMERE Tel.: +31-88-478 6336 Telefax: +31-88-478 6332 E-mail: info_gnl@grundfos.com

New Zealand

GRUNDFOS Pumps NZ Ltd. 17 Beatrice Tinsley Crescent North Harbour Industrial Estate Albany, Auckland Phone: +64-9-415 3240 Telefax: +64-9-415 3250

Norway

GRUNDFOS Pumper A/S Strømsveien 344 Postboks 235, Leirdal N-1011 Oslo Tlf.: +47-22 90 47 00 Telefax: +47-22 32 21 50

Poland

GRUNDFOS Pompy Sp. z o.o. ul. Klonowa 23 Baranowo k. Poznania PL-62-081 Przeźmierowo Tel: (+48-61) 650 13 00 Fax: (+48-61) 650 13 50

Portugal

Bombas GRUNDFOS Portugal, S.A. Rua Calvet de Magalhães, 241 Apartado 1079 P-2770-153 Paço de Arcos Tel.: +351-21-440 76 00 Telefax: +351-21-440 76 90

Romania

GRUNDFOS Pompe România SRL Bd. Biruintei, nr 103 Pantelimon county Ilfov Phone: +40 21 200 4100 Telefax: +40 21 200 4101 E-mail: romania@grundfos.ro

Russia

ООО Грундфос Россия ул. Школьная, 39-41 Москва, RU-109544, Russia Тел. (+7) 495 564-88-00 (495) 737-30-00 Факс (+7) 495 564 8811 E-mail grundfos.moscow@grundfos.com

Serbia

Grundfos Srbija d.o.o. Omladinskih brigada 90b 11070 Novi Beograd Phone: +381 11 2258 740 Telefax: +381 11 2281 769 www.rs.grundfos.com

Singapore

GRUNDFOS (Singapore) Pte. Ltd. 25 Jalan Tukang Singapore 619264 Phone: +65-6681 9688 Telefax: +65-6681 9689

Slovakia

GRUNDFOS s.r.o. Prievozská 4D 821 09 BRATISLAVA Phona: +421 2 5020 1426 sk.grundfos.com

Slovenia

GRUNDFOS LJUBLJANA, d.o.o. Leskoškova 9e, 1122 Ljubljana Phone: +386 (0) 1 568 06 10 Telefax: +386 (0)1 568 06 19 E-mail: tehnika-si@grundfos.com

South Africa

Grundfos (PTY) Ltd. 16 Lascelles Drive, Meadowbrook Estate 1609 Germiston, Johannesburg Tel.: (+27) 10 248 6000 Fax: (+27) 10 248 6002 E-mail: lgradidge@grundfos.com

Spain

Bombas GRUNDFOS España S.A. Camino de la Fuentecilla, s/n E-28110 Algete (Madrid) Tel.: +34-91-848 8800 Telefax: +34-91-628 0465

Sweden

GRUNDFOS AB Box 333 (Lunnagårdsgatan 6) 431 24 Mölndal Tel.: +46 31 332 23 000 Telefax: +46 31 331 94 60

Switzerland

GRUNDFOS Pumpen AG Bruggacherstrasse 10 CH-8117 Fällanden/ZH Tel.: +41-44-806 8111 Telefax: +41-44-806 8115

Taiwan

GRUNDFOS Pumps (Taiwan) Ltd. 7 Floor, 219 Min-Chuan Road Taichung, Taiwan, R.O.C. Phone: +886-4-2305 0868 Telefax: +886-4-2305 0878

Thailand

GRUNDFOS (Thailand) Ltd. 92 Chaloem Phrakiat Rama 9 Road, Dokmai, Pravej, Bangkok 10250 Phone: +66-2-725 8999 Telefax: +66-2-725 8998

Turkey

GRUNDFOS POMPA San. ve Tic. Ltd. Sti. Gebze Organize Sanayi Bölgesi Ihsan dede Caddesi,

2. yol 200. Sokak No. 204 41490 Gebze/ Kocaeli Phone: +90 - 262-679 7979 Telefax: +90 - 262-679 7905 E-mail: satis@grundfos.com

Ukraine

Бізнес Центр Європа Столичне шосе, 103 м. Київ, 03131, Україна Телефон: (+38 044) 237 04 00 Факс.: (+38 044) 237 04 01 E-mail: ukraine@grundfos.com

United Arab Emirates

GRUNDFOS Gulf Distribution P.O. Box 16768 Jebel Ali Free Zone Dubai Phone: +971 4 8815 166 Telefax: +971 4 8815 136

United Kingdom

GRUNDFOS Pumps Ltd. Grovebury Road Leighton Buzzard/Beds. LU7 4TL Phone: +44-1525-850000 Telefax: +44-1525-850011

U.S.A.

GRUNDFOS Pumps Corporation 9300 Loiret Blvd. Lenexa, Kansas 66219 Phone: +1-913-227-3400 Telefax: +1-913-227-3500

Uzbekistan

Grundfos Tashkent, Uzbekistan The Representative Office of Grundfos Kazakhstan in Uzbekistan 38a, Oybek street, Tashkent Телефон: (+998) 71 150 3290 / 71 150 3291 Факс: (+998) 71 150 3292

Addresses Revised 15.01.2019

Grundfos companies

99462941 1119

ECM: 1275702

www.grundfos.com

Trademarks displayed in this material, including but not limited to Grundfos, the Grundfos logo and “be think innovate” are registered trademarks owned by The Grundfos Group. All rights reserved. © 2019 Grundfos Holding A/S, all rights reserved.

GRUNDFOS ALPHA2 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. General information

1.1 Hazard statements

1.2 Notes

2. Receiving the product

2.1 Inspecting the product

2.2 Scope of delivery

3. Installing the product

3.1 Mechanical installation

3.1.1 Mounting the product

3.2 Pump positions

3.3 Control box positions

3.3.3 Changing the control box position

3.4 Insulating the pump housing

3.5 Electrical installation

3.6 Assembling the plug

4. Starting up the product

4.1 Before startup

4.2 First startup

4.3 Venting the pump

5. Product introduction

5.1 Product description

5.2 Intended use

5.3 Pumped liquids

5.4 Identification

5.4.1 Model type

5.4.2 Nameplate

5.4.3 Type key

5.5 Accessories

5.5.1 Unions and valve kits

5.6 Insulating shells, ALPHA2

5.8 ALPHA Reader

5.7 ALPHA plugs

6. Control modes

6.2 Proportional-pressure mode

6.3 Constant-pressure mode

6.4 Constant curve/constant speed

6.5 Automatic night setback

6.6 Guide to control mode selection

6.7 Pump performance

7. Setting the product

7.1 Elements on the operating panel

7.3 Light fields indicating the pump setting

7.2 Display

7.4 Button for enabling or disabling of automatic night setback

7.5 Button for selection of pump setting

7.6 Setting automatic night setback

7.7 Setting manual summer mode

7.7.1 Activating manual summer mode

7.7.2 Deactivating manual summer mode

7.8 Dry-running protection

7.9 Using ALPHA Reader

7.9.1 Activating and deactivating the ALPHA Reader mode on the pump

8. Servicing the product

8.2 Dismantling the plug

8.1 Dismantling the product

9. Fault finding the product

9.1 High-torque start

9.2 Fault finding table

10. Technical data

10.1 Dimensions, ALPHA2 XX-40, XX-50, XX-60, XX-80

11. Performance curves

11.1 Guide to performance curves

11.2 Curve conditions

11.3 Performance curves, ALPHA2 XX-40 (N)

11.4 Performance curves, ALPHA2 XX-50 (N)

11.5 Performance curves, ALPHA2 XX-60 (N)

11.6 Performance curves, ALPHA2 XX-80 (N)

12. Disposing of the product