Grundfos ALPHA2 25-60 N 130 User manual

GRUNDFOS ALPHA2
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, 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
95047457 0813).
PL: Deklaracja zgodności WE
My, Grundfos, oświadczamy z pełnąodpowiedzialnością, że nasze
wyroby GRUNDFOS ALPHA2, których deklaracja niniejsza dotyczy, są
zgodne z następującymi wytycznymi Rady d/s ujednolicenia przepisów
prawnych krajów członkowskich WE:
— Dyrektywa Niskonapięciowa (LVD) (2006/95/WE).
Zastosowana norma: EN 60335-2-51:2003.
— Dyrektywa EMC (2004/108/WE).
Zastosowana norma: EN 55014-1:2006 oraz EN 55014-2:1997.
— Dyrektywa Ekoprojektowa (2009/125/WE).
Pompy obiegowe:
Rozporządzenie Komisji (WE) Nr 641/2009 oraz 622/2012.
Dotyczy tylko pomp obiegowych oznaczonych sprawnością
energetycznąEEI. Patrz tabliczka znamionowa na pompie.
Zastosowane normy: EN 16297-1:2012 oraz EN 16297-2:2012.
Deklaracja zgodności WE jest ważna tylko i wyłącznie wtedy kiedy jest
opublikowana przez firmęGrundfos i umieszczona w instrukcji montażu
i eksploatacji (numer publikacji 95047457 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.

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 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 Display 11
7.3 Light fields indicating the pump setting 11
7.4 Light field indicating the status of Automatic Night
SetBack 11
7.5 Push-button for activation of Automatic Night SetBack 11
7.6 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. Automatic Night SetBack 13
9.1 Basis for Automatic Night SetBack 13
9.2 Function of Automatic Night SetBack 13
10. Systems with bypass valve between flow and return
pipes 14
10.1 Purpose of bypass valve 14
10.2 Manually operated bypass valve 14
10.3 Automatic bypass valve (thermostatically controlled) 14
11. Startup 15
11.1 Before start-up 15
11.2 Venting the pump 15
11.3 Venting of heating systems 15
12. Pump settings and pump performance 16
12.1 Relation between pump setting and pump performance 16
13. Fault finding 17
14. Technical data and installation dimensions 18
14.1 Technical data 18
14.2 Installation dimensions, GRUNDFOS ALPHA2 XX-50,
XX-60 19
15. Performance curves 20
15.1 Guide to performance curves 20
15.2 Curve conditions 21
15.3 Performance curves, ALPHA2 XX-50 22
15.4 Performance curves, ALPHA2 XX-60 23
16. Accessories 24
17. Disposal 24
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 circulator pump is designed for the
circulation of water in heating systems and domestic hot-water
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
The installation of a GRUNDFOS ALPHA2 means
easy installation and start-up
• The pump is easy to install.
Thanks to the AUTOADAPT function (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 6005 4512
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
Example ALPHA2 15 -50 - 130
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]
1
ALPHA2 15-50 130
AUTO
ADAPT
W
Prod. No. 95047500
00000001
Serial No.
PC 0740 TF110
IP 42 230V ~ 50Hz
MADE IN DENMARK
Max.
Min. 0.05
11/1(A) P1(W) MPa
5
22 1.0
0.19
2
3
4
5
6
7
9
10
11
12
13
14
0.23 - Part 2
8
KM07183

English (GB)
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4. Applications
4.1 System types
Fig. 3 Pumped liquids and operating conditions
GRUNDFOS ALPHA2 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
• systems where night setback is desired.
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.
In domestic hot-water systems, it is advisable to use GRUNDFOS
ALPHA2 pumps only for water with a degree of hardness lower
than approx. 14 °dH. For water with a higher degree of hardness,
we recommend a direct-coupled TPE pump.
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 8568 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)
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5. Mechanical installation
5.1 Mounting
Fig. 4 Mounting the GRUNDFOS ALPHA2
Arrows on the pump housing indicate the liquid flow direction
through the pump.
See section 14.2 Installation dimensions, GRUNDFOS ALPHA2
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 8569 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 8570 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 16. Accessories.
TM05 8567 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 8571 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.