Grundfos alpha2 l User manual

GRUNDFOS
ALPHA2 L
GRUNDFOS INSTRUCTIONS
www.grundfos.com/ALPHA2L

We
       
declare under our sole responsibility that the products
              
, to which this declaration relates, are in conformity
with the Council Directives on the approximation of the laws of the EC
Member States relating to
— Machinery (98/37/EC).
— Electrical equipment designed for use within certain voltage limits
(2006/95/EC).
Standards used: EN 60335-1: 2002 and EN 60335-2-51: 2003.
— Electromagnetic compatibility (2004/108/EC).
Standards used: EN 61000-6-2 and EN 61000-6-3.
Bjerringbro, 15th May 2008
Svend Aage Kaae
Technical Director
2

3
   
                                                                !
              "                                                     #
$   " "                                                               %
!  &   '
#  (                                                                
%  )       "                                                           
*           "   "                                                    !
'         +      "    ,   ,     +       +          "  "                    %
- ."  '
 /     "            "   " "                                            /
                                                                     
   0                                                                  $
 $              ,                                                    #
!     $
#      $$
%   "   $!

4
1 2 3 4 5 4 6
7 3 5 8 3 9 8 5 4 : 9 2 ; ; 2 9 5 8 4 < 3 = 2 > 9 ? = : = 5 4 : 9 2 ; ; 2 9 5 8 4 2 4 > 8 @ = 3 2 9 5 4 6
5 4 : 9 3 A B 9 5 8 4 : C D 4 : 9 2 ; ; 2 9 5 8 4 2 4 > 8 @ = 3 2 9 5 8 4 E A : 9 B 8 E @ ; F G 5 9 ? ; 8 B 2 ;
3 = 6 A ; 2 9 5 8 4 : 2 4 > 2 B B = @ 9 = > B 8 > = : 8 H 6 8 8 > @ 3 2 B 9 5 B = C
1 2 3 4 5 4 6
D H 9 ? = : = : 2 H = 9 F 5 4 : 9 3 A B 9 5 8 4 : 2 3 = 4 8 9 8 I : = 3 J = > < 5 9 E 2 F 3 = : A ; 9 5 4
@ = 3 : 8 4 2 ; 5 4 K A 3 F L
M N O P Q R S
D H 9 ? = : = : 2 H = 9 F 5 4 : 9 3 A B 9 5 8 4 : 2 3 = 4 8 9 8 I : = 3 J = > < 5 9 E 2 F 3 = : A ; 9 5 4
E 2 ; H A 4 B 9 5 8 4 8 3 > 2 E 2 6 = 9 8 9 ? = = T A 5 @ E = 4 9 L
U R P V W
8 9 = : 8 3 5 4 : 9 3 A B 9 5 8 4 : 9 ? 2 9 E 2 X = 9 ? = K 8 I = 2 : 5 = 3 2 4 > = 4 : A 3 = : 2 H =
8 @ = 3 2 9 5 8 4 C

5
Contents:
Y Z [ \ ] ^ _ ` a b c d e f g h i j g Y h k l m k n o p q r m s n t s
Y Z Y g u v p w q p x ^ y r z l w y q p o o l w x p _ ` a b c d e f g h i j g Y h
.
The GRUNDFOS ALPHA2 L circulator pump is designed for the
circulation of water in heating systems.
Install the GRUNDFOS ALPHA2 L in
• underfloor heating systems
• one-pipe systems
• two-pipe systems.
GRUNDFOS ALPHA2 L incorporates a permanent-magnet motor and
differential-pressure control enabling continuous adjustment of the pump
performance to the actual system requirements.
GRUNDFOS ALPHA2 L has a user-friendly front-mounted control panel.
See
{
Z | r w q m r o s p w ^ o
and
[ } Z d ^ p q n m ^ y
.
The installation of a GRUNDFOS ALPHA2 L means
                        .  "
• GRUNDFOS ALPHA2 L is easy to install.
With the factory setting, the pump can, in most cases, be started
without making any settings.
                 
• Minimum noise from valves, etc.
  +            "    
• Low energy consumption compared to conventional circulator pumps.
The GRUNDFOS ALPHA2 L is A-labelled.
    
Energy label, A-labelled
TM03 0868 0705

6
Contents:
~ Z [ f  y q ^ t q  s ^ y
~ Z Y i n t s ^ u o l  n l u y
~ Z ~ f  y q ^ t s m ^ y y n m ^
~ Z } ` ^ o p q l v ^ p l m ] n t l u l q   ` j 
~ Z   w k o r y n m ^ k o p y y
~ Z
{ 
w o ^ q s m ^ y y n m ^
.
    
Pumped liquids and operating conditions
GRUNDFOS ALPHA2 L is suitable for
• systems with
      
or
,           + 
where it is desirable to
optimise the setting of the pump duty point
• systems with
,           + . "  "     "       
.
Clean, thin, non-aggressive and non-explosive liquids, not containing
solid particles, fibres or mineral oil. See fig. 2.
In
             
, the water should meet the requirements of accepted
standards on water quality in heating systems, e.g. the German standard
VDI 2035.
TM04 2521 2608
1 2 3 4 5 4 6
 ? = @ A E @ E A : 9 4 8 9 I = A : = > H 8 3 9 ? = 9 3 2 4 : H = 3 8 H H ; 2 E E 2 I ; = ; 5 T A 5 > :
: A B ? 2 : > 5 = : = ; 8 5 ; < @ = 9 3 8 ; 2 4 > : 5 E 5 ; 2 3 ; 5 T A 5 > : C

7
Maximum 1.0 MPa (10 bar). See fig. 2.
Maximum 95 %. See fig. 2.
IP 42. See fig. 2.
Minimum inlet pressure in relation to liquid temperature. See fig. 2.
         "        
           "       


      
≤75 °C 0.005 0.05
90 °C 0.028 0.28
110 °C 0.108 1.08

8
Contents:
} Z [  r n w q l w x
} Z Y | r w q m r o  r  s r y l q l r w y
} Z ~ | ] p w x l w x q ] ^ k r w q m r o  r  s r y l q l r w
} Z }

w y n o p q l r w r z s n t s ] r n y l w x
.
    $
Mounting the GRUNDFOS ALPHA2 L
Arrows on the pump housing indicate the liquid flow direction through the
pump.
See
[ Y Z Y

w y q p o o p q l r w u l t ^ w y l r w y  _ ` a b c d e f g h i j g Y h    }        

{

.
1. Fit the two gaskets supplied when the pump is mounted in the pipe.
See fig. 3, pos. A.
2. Install the pump with the motor shaft horizontal. See fig. 3, pos. B.
TM04 2522 2608

9
    !
Control box positions
The control box can be rotated in steps of 90 °.
Possible/permissible positions and the procedure of changing the position
of the control box are illustrated in fig. 4, pos. A.
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.
TM04 2523 2608
A
1 2 3 4 5 4 6
 ? = @ A E @ = > ; 5 T A 5 > E 2 F I = : B 2 ; > 5 4 6 ? 8 9 2 4 > A 4 > = 3 ? 5 6 ? @ 3 = : : A 3 = L
 3 2 5 4 9 ? = : F : 9 = E 8 3 B ; 8 : = 9 ? = 5 : 8 ; 2 9 5 4 6 J 2 ; J = : 8 4 = 5 9 ? = 3 : 5 > = 8 H 9 ? =
@ A E @ I = H 8 3 = 9 ? = : B 3 = G : 2 3 = 3 = E 8 J = > C
M N O P Q R S
1 ? = 4 9 ? = @ 8 : 5 9 5 8 4 8 H 9 ? = B 8 4 9 3 8 ; I 8  ? 2 : I = = 4 B ? 2 4 6 = > < H 5 ; ; 9 ? =
: F : 9 = E G 5 9 ? 9 ? = ; 5 T A 5 > 9 8 I = @ A E @ = > 8 3 8 @ = 4 9 ? = 5 : 8 ; 2 9 5 4 6 J 2 ; J = : C

10
    #
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. 5.
As an alternative, polystyrene insulation shells can be ordered from
Grundfos. See
[  Z g k k ^ y y r m l ^ y
.
TM04 2524 2608
U R P V 
5 E 5 9 9 ? = ? = 2 9 ; 8 : : H 3 8 E 9 ? = @ A E @ ? 8 A : 5 4 6 2 4 > @ 5 @ = G 8 3 X C
M N O P Q R S
 8 4 8 9 5 4 : A ; 2 9 = 9 ? = B 8 4 9 3 8 ; I 8  8 3 B 8 J = 3 9 ? = B 8 4 9 3 8 ; @ 2 4 = ; C