Table of Contents
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Table of Contents
Related Manuals for Grundfos ALPHA1 26-99
Summarization of Contents
General information
Hazard statements
Symbols and hazard statements used in instructions, with danger, warning, caution levels.
Notes
Symbols for explosion-proof products, required actions, prohibited actions, and tips.
Installation
Pressurized system safety
Warning about high pressure and hot liquid when working on the pump.
Electric shock safety
Warning about electric shock hazards during installation.
3.1 Changing the pump head position
Procedure to safely rotate the pump head to a desired position, with safety warnings.
Hot surface precautions
Warning about hot surfaces and how to position the pump to avoid contact.
3.2 Insulating the pump housing
Instructions on insulating the pump housing, avoiding control box and drain holes.
3.3 Electrical installation
Covers electrical safety, power supply, inrush current, and leakage current for installation.
Ground fault circuit interrupter (GFCI)
Information on using GFCI protection for electric shock prevention.
3.3.1 Power supply connection
Details on connecting the pump to the power supply, including safety precautions.
3.3.2 Signal-cable connection
Instructions for connecting signal cables for external control, with safety warnings.
Starting up the product
Hot liquid and pressurized system warnings
Cautions regarding hot liquid and pressurized systems during startup.
Product introduction
5.1 Product description
Describes the canned-rotor type of ALPHA1 and ALPHA2 circulator pumps.
5.1.1 ALPHA2 26-99 - internally controlled
Details the ALPHA2 26-99 pump's internal control via a user interface.
5.1.2 ALPHA1 26-99 - externally controlled
Explains the ALPHA1 26-99 pump's external control via a 0-10 VDC signal.
5.2 Applications
Specifies applications for ALPHA1/ALPHA2 pumps in heating, AC, and cold-water systems.
5.3 Pumped liquids
Details on suitable and unsuitable liquids for the pump, including safety warnings.
Identification
5.4.1 Nameplate
Explanation of the nameplate details and their meaning.
Approvals
5.5.1 cULus approval
Information on UL approvals for ALPHA1/ALPHA2 pumps in North America.
Approval hazard caution
Caution regarding cULus listed pumps being tested with water only.
Control functions
6.1 Internal control principles
Explains how ALPHA2 pumps control differential pressure internally.
Proportional Pressure AUTOADAPT
AUTOADAPT setting for proportional pressure control.
Constant Pressure AUTOADAPT
AUTOADAPT setting for constant pressure control.
6.2 External control principles
Explains external control for ALPHA1 pumps using 0-10 VDC signals.
6.2.1 0-10 VDC
Details the 0-10 VDC signal input for controlling ALPHA1 pump speed.
Alarm output signal
Information on the alarm output signal and its conditions.
Technical data
8.1 Approval codes
Lists approval codes for different pump models and their specifications.
8.2 Operating conditions
Details supply voltage, motor protection, enclosure class, and pressure limits.
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