Grundfos alpha2 l User manual

GRUNDFOS ALPHA2 L
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

Declaration of conformity
2
Declaration of conformity
GB: EC declaration of conformity
We, Grundfos, declare under our sole responsibility that the product
GRUNDFOS ALPHA2 L, to which this declaration relates, is in conformity
with these Council directives on the approximation of the laws of the EC
member states:
— Low Voltage Directive (2006/95/EC).
Standard used: EN 60335-2-51:2003.
— EMC Directive (2004/108/EC).
Standards used: EN 55014-1:2006 and EN 55014-2:1997.
— Ecodesign Directive (2009/125/EC).
Circulators:
Commission Regulation Nos 641/2009 and 622/2012.
Applies only to circulators marked with the energy efficiency index
EEI. See the pump nameplate.
Standards used: EN 16297-1:2012 and EN 16297-2:2012.
This EC declaration of conformity is only valid when published as part of
the Grundfos installation and operating instructions (publication number
95047490 0813).
RU: Декларация осоответствии ЕС
Мы, компания Grundfos, со всей ответственностью заявляем,
что изделия GRUNDFOS ALPHA2 L, ккоторым относится настоящая
декларация, соответствуют следующим Директивам Совета
Евросоюза об унификации законодательных предписаний
стран-членов ЕС:
—Низковольтное оборудование (2006/95/EC).
Применявшийся стандарт: EN 60335-2-51:2003.
—Электромагнитная совместимость (2004/108/EC).
Применявшиеся стандарты: EN 55014-1:2006 иEN 55014-2:1997.
—Директива по экологическому проектированию
энергопотребляющей продукции (2009/125/EC).
Циркуляционные насосы:
Постановление Комиссии №641/2009 и622/2012.
Применяется только по отношению кциркуляционным насосам,
промаркированным иимеющим индекс энергоэффективности
EEI. См. фирменную табличку насоса.
Применявшиеся стандарты: EN 16297-1:2012 и
EN 16297-2:2012.
Данная декларация осоответствии ЕС имеет силу только вслучае
публикации всоставе инструкции по монтажу иэксплуатации на
продукцию производства компании Grundfos (номер публикации
95047490 0813).
Bjerringbro, 1st August 2013
Svend Aage Kaae
Technical Director
Grundfos Holding A/S
Poul Due Jensens Vej 7
8850 Bjerringbro, Denmark
Person authorised to compile technical file and
empowered to sign the EC declaration of conformity.
Декларация осоответствии на территории РФ
Насосы серии GRUNDFOS ALPHA2 L сертифицированы всистеме
ГОСТ Р.
Сертификат соответствия:
№РОСС DK.АЯ56.B43661, срок действия до 24.04.2014г.
1 августа 2013г.
Касаткина В. В.
Руководитель отдела качества,
экологии иохраны труда
ООО Грундфос Истра, Россия
143581, Московская область,
Истринский район,
дер. Лешково, д.188
Àß56

English (GB)
3
English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
1. Symbols used in this document 3
2. General description 4
2.1 Advantages of installing a GRUNDFOS ALPHA2 L 4
3. Identification 5
3.1 Nameplate 5
3.2 Type key 5
4. Applications 6
4.1 System types 6
4.2 Pumped liquids 6
4.3 System pressure 6
4.4 Relative air humidity (RH) 6
4.5 Enclosure class 6
4.6 Inlet pressure 6
5. Mechanical installation 7
5.1 Mounting 7
5.2 Control box positions 8
5.3 Changing the control box position 8
5.4 Insulation of pump housing 9
6. Electrical installation 10
7. Control panel 11
7.1 Elements on the control panel 11
7.2 "POWER ON" light field 11
7.3 Light fields indicating the pump setting 11
7.4 Push-button for selection of pump setting 11
8. Setting the pump 12
8.1 Pump setting for system type 12
8.2 Pump control 12
9. Systems with bypass valve between flow and return
pipes 13
9.1 Purpose of bypass valve 13
9.2 Manually operated bypass valve 13
9.3 Automatic bypass valve (thermostatically controlled) 13
10. Startup 14
10.1 Before start-up 14
10.2 Venting the pump 14
10.3 Venting of heating systems 14
11. Pump settings and pump performance 15
11.1 Relation between pump setting and pump performance 15
12. Fault finding 16
13. Technical data and installation dimensions 17
13.1 Technical data 17
13.2 Installation dimensions, GRUNDFOS ALPHA2 L XX-
40, XX-50, XX-60 18
14. Performance curves 19
14.1 Guide to performance curves 19
14.2 Curve conditions 19
14.3 Performance curves, ALPHA2 L XX-40 20
14.4 Performance curves, ALPHA2 L XX-50 21
14.5 Performance curves, ALPHA2 L XX-60 22
15. Accessories 23
16. Disposal 23
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
The use of this product requires experience with
and knowledge of the product.
Persons with reduced physical, sensory or
mental capabilities must not use this product,
unless they are under supervision or have been
instructed in the use of the product by a person
responsible for their safety.
Children must not use or play with this product.
Warning
If these safety instructions are not observed,
it may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Note
Notes or instructions that make the job easier
and ensure safe operation.

English (GB)
4
2. General description
The GRUNDFOS ALPHA2 L circulator pump is designed for the
circulation of water in heating systems.
The pump is suitable for the following systems:
• underfloor heating systems
• one-pipe systems
• two-pipe systems.
The pump incorporates a permanent-magnet motor and
differential-pressure control enabling continuous adjustment of
the pump performance to the actual system requirements.
The pump has a user-friendly front-mounted control panel.
See sections 3. Identification and 7. Control panel.
2.1 Advantages of installing a GRUNDFOS ALPHA2 L
The installation of a GRUNDFOS ALPHA2 L means
easy installation and start-up
• The pump is easy to install.
With the factory setting, the pump can, in most cases, be
started without making any settings.
high degree of comfort
• Minimum noise from valves, etc.
low energy consumption
• Low energy consumption compared to conventional circulator
pumps.
Energy efficiency index (EEI)
• The Ecodesign directive for energy-using (EuP) and energy-
related (ErP) products is EU legislation requiring
manufacturers to reduce the overall environmental impact of
their products.
• Circulator pumps will be EuP-ready and comply with the
requirements as from 2015.
Fig. 1 EuP-ready label
TM05 7745 1613

English (GB)
5
3. Identification
3.1 Nameplate
Fig. 2 Example of nameplate
3.2 Type key
TM05 5925 2013
Pos. Description Pos. Description
1 Pump type 8 Energy efficiency index (EEI)
2 Product number 9
Rated current [A]:
• Min.: Minimum current [A]
• Max.: Maximum current [A]
3 Serial number 10
Input power P1 [W]:
• Min.: Minimum input power P1 [W]
• Max.: Maximum input power P1 [W]
4
Production code:
• 1st and 2nd digits = year
• 3rd and 4th digits = week
11 Maximum system pressure [MPa]
5 Enclosure class 12 CE mark and approvals
6 Voltage [V] 13 Country of manufacture
7 Frequency [Hz] 14 Temperature class
Prod. No. 95047562
00000001
Serial No.
PC 0833 TF110
IP 42 230V ~ 50Hz Max.
Min. 0.05
I1/1(A) P1(W) MPa
5
22 1.0
0.19
KM07183
2
3
4
5
6
7
9
10
11
12
13
14
8MADE IN DENMARK
0.23 - Part 2
1
ALPHA2 25-40 180
AUTO
ADAPT
W
A
ALPHA2L 25-40 180
ON
POWER
ALPHA2 L 25-40 180
Example ALPHA2 L 25 -40 180
Pump type
Nominal diameter (DN) of suction and discharge ports [mm]
Maximum head [dm]
: Cast-iron pump housing
N: Stainless-steel pump housing
A: Pump housing with air separator
Port-to-port length [mm]

English (GB)
6
4. Applications
4.1 System types
Fig. 3 Pumped liquids and operating conditions
GRUNDFOS ALPHA2 L is suitable for
• systems with constant or variable flows where it is desirable to
optimise the setting of the pump duty point.
• systems with variable flow-pipe temperature.
4.2 Pumped liquids
Clean, thin, non-aggressive and non-explosive liquids, not
containing solid particles, fibres or mineral oil. See fig. 3.
In heating systems, the water should meet the requirements of
accepted standards on water quality in heating systems, for
example the German standard VDI 2035.
4.3 System pressure
Maximum 1.0 MPa (10 bar). See fig. 3.
4.4 Relative air humidity (RH)
Maximum 95 %. See fig. 3.
4.5 Enclosure class
IP42. See fig. 3.
4.6 Inlet pressure
Minimum inlet pressure in relation to liquid temperature.
See fig. 3.
TM05 8562 2413
Warning
The pump must not be used for the transfer of
flammable liquids such as diesel oil, petrol and
similar liquids.
Liquid
temperature
Minimum inlet pressure
[MPa] [bar]
≤75 °C 0.005 0.05
90 °C 0.028 0.28
110 °C 0.108 1.08

English (GB)
7
5. Mechanical installation
5.1 Mounting
Fig. 4 Mounting the GRUNDFOS ALPHA2 L
Arrows on the pump housing indicate the liquid flow direction
through the pump.
See section 13.2 Installation dimensions, GRUNDFOS ALPHA2 L
XX-40, XX-50, XX-60.
• Fit the two gaskets supplied when the pump is mounted in the
pipe.
• Install the pump with horizontal motor shaft. See fig. 4.
TM05 8563 2413

English (GB)
8
5.2 Control box positions
Fig. 5 Control box positions
5.3 Changing the control box position
The control box position can be changed in steps of 90 °.
Possible/permissible positions and the procedure of changing the
position of the control box are illustrated in fig. 5.
Procedure:
1. Slacken and remove the four hexagon-socket head screws
holding the pump head with a tee key (M4).
2. Turn the pump head to the desired position.
3. Insert and cross-tighten the screws.
TM05 8564 2413
Warning
The pumped liquid may be scalding hot and
under high pressure.
Drain the system or close the isolating valves on
either side of the pump before the screws are
removed.
Caution
Fill the system with the liquid to be pumped or
open the isolating valves when the position of the
control box has been changed.

English (GB)
9
5.4 Insulation of pump housing
Fig. 6 Insulation of pump housing
The heat loss from the pump and pipework can be reduced by
insulating the pump housing and the pipe. See fig. 6.
As an alternative, polystyrene insulating shells can be fitted to the
pump. See section 15. Accessories.
TM05 8561 2413
Note
Limit the heat loss from the pump housing and
pipework.
Caution
Do not insulate the control box or cover the
control panel.

English (GB)
10
6. Electrical installation
Fig. 7 Electrical connection
Carry out the electrical connection and protection according to
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
3.1 Nameplate.
• Connect the pump to the power supply with the plug supplied
with the pump as shown in fig. 7.
• Light in the control panel shows that the power supply has
been switched on.
TM05 8565 2413
Warning
The pump must be connected to earth .
The pump must be connected to an external
mains switch with a minimum contact gap of
3 mm in all poles.