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Grundfos alpha2l User Manual

Grundfos alpha2l
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GRUNDFOS INSTRUCTIONS
ALPHA2 L
ALPHA2
2
2
L
PHA
2
LPHA2
L
L
AL
AL
ALPHA2 L
www.grundfos.com
GRUNDFOS ALPHA2 L
Installation and operating instructions
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Grundfos alpha2l Specifications

General IconGeneral
Voltage230 V
Protection ClassIP42
Maximum Operating Pressure10 bar
Enclosure ClassIP42
Insulation ClassF
Pump HousingCast iron
TypeCirculator pump
Frequency50 Hz
ApprovalsCE
ConnectionG 1"
Ambient TemperatureUp to 40°C

Summary

Installation and Operating Instructions

Applications of the GRUNDFOS ALPHA2 L

Installation and Mounting Procedures

Mounting the GRUNDFOS ALPHA2 L Pump

Provides instructions and figures for correctly mounting the pump in the pipework, ensuring correct flow direction.

Electrical Connection Procedure

Control Panel Elements and Functions

Control Panel Components Identification

Identifies and describes the key components of the control panel: indicator light, light fields, and push-button.

Pump Setting Selection Methods

Light Fields for Pump Setting Indication

Details the seven different light fields used to indicate the selected pump setting and their corresponding curves.

Using the Push-Button for Setting Selection

Describes how to use the push-button to cycle through and select the desired pump setting.

Setting the Pump

Pump Setting for System Type

Recommends specific pump settings for different heating system types, illustrating recommended and alternative settings.

Pump Control Modes Explained

Explains the two main control modes: proportional-pressure control (PP) and constant-pressure control (CP), and their effect on pump performance.

Bypass Valve Systems Operation

Purpose of the Bypass Valve

Explains the function of a bypass valve in ensuring heat distribution when radiator valves are closed.

Start-up and Venting Procedures

Pre-Start-up Checks

Emphasizes filling the system with liquid and ensuring minimum inlet pressure before starting the pump.

Pump Settings and Performance Relation

Relation Between Pump Setting and Performance

Explains how different pump settings affect the pump's Q/H performance curves and power consumption.

Fault Finding Chart and Remedies

Technical Data and Installation Dimensions

Performance Curves

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