Circulation pumps class A - Grundfos Alpha 2 and Alpha 2L
Purpose: Circulating pumps new generation of floor heating, radiant heating , pipe and two-pipe systems.
Application: Systems with constant or variable flows where it is desirable to optimise the setting of the pump duty point. Systems with variable flow temperature in the pipes.
Construction: GRUNDFOS ALPHA2/2L combines engine rotor with permanent magnets and differential-pressure control, allowing continuous adjustment of the pump according to the actual needs of the system.
Control Panel: GRUNDFOS ALPHA2/2L has an easy to use control panel, front-mounted pump. The control panel can be rotated in steps of 90 degrees. Additional equipment (ALPHA2): Thanks to the AUTOADAPT (factory setting), the pump can, in most cases, be released without any settings. A brief description of the panel (ALPHA2): Display showing the actual power consumption of the pump in W. Eight light fields indicating the pump setting. Light field indicating the status of an "automatic night work". (ALPHA2L): LED "POWER ON". Seven LEDs for pump settings. Button to select the setting of the pump.
Energy class: Low power consumption compared to conventional circulator pumps. GRUNDFOS ALPHA2/2L is energy class A.
Features and Benefits: Minimum noise from valves, etc. Mode "Night work" (ALPHA2): If the water temperature drops by more than 10-15° C within 2 hours. Changeover to "normal operation" is performed when registering an increase of temperature by 10 °C. The pump must be installed in the flow pipe.
- Temperature range of the liquid : 2 .. 110 ° C
- Work flow : 0,2 - 3,2 m3 / h
- Working pressure : 1,0 - 6,0 m
- Maximum head : 6,1 m
- Maximum Power Consumption : 5 .. 22 W (XX- 40 ), 5 .. 45 W (XX- 60 )
- Class of protection against external influences (IEC 34-5): IP 42
- Insulation class (IEC 85 ): F Protections: E. No additional protections.
- Pump housing : Cast iron EN-JL 1020
- Impeller : Composite, PP
- Connection of the pump : G 1 1/2 "(XX- 40 ), G 2 " (XX- 60 )
- Installation length 180 mm ( on request 130 mm)
- Connection of junctions : 1 "or 1 ¼" ( not included)
- Maximum system pressure : Up to 1,0 MPa ( 10 bar)
- Power and speed: 1 x 230 V, 50 Hz
- Number of speeds: Automatic speed (AutoADAPT) or 3 speeds
- Weight : about 2,1 kg
- Approval plate : VDE, GS, CE
- Manufacturer : GRUNDFOS - Denmark
Alpha 2 L:
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