Danfoss ABNM A5 Proportional Thermal Actuator Operating Guide

Quick guide from the manual

This document provides essential instructions for the Danfoss ABNM A5 proportional thermal actuator, designed for use with AB-QM valves (DN 10-32). Key procedures include physical mounting, electrical wiring, the first-time unlocking process for NC (Normally Closed) versions, and understanding the auto-calibration cycle.

Mounting and demounting

The actuator is designed for easy installation on the Danfoss AB-QM VA41 valve. Ensure the device is installed correctly to maintain its IP54 rating.

• Place the actuator onto the valve adapter.
• Press down until you hear a click, confirming it is securely locked.
• To demount, press the release mechanism and pull the actuator upwards.
• The device maintains an IP54 rating in any position, provided the cable is properly plugged in.

Electrical connection

The actuator operates on 24V (AC or DC, depending on the specific type). Wiring requirements are as follows:

• 0-10 V (DC) +: Red wire
• 0: Blue wire
• Common/Ground: Black wire

Unlock NC version (First Open Function)

For NC versions, the actuator must be unlocked before initial use:

• Power on the device for more than 6 minutes to allow the internal mechanism to retract approximately 8.3 mm.
• After the initial power-on, the actuator will operate within a range of approximately 0.5 mm to 3 mm.

Auto calibration

The ABNM A5 performs an automatic calibration to detect open and close points. The process follows this timeline:

• 0-6 minutes: Unlocking phase (for NC versions).
• 6-30 minutes: Auto-calibration phase to detect valve end positions.
• After 8 hours: The device stores the calibration values.

The actuator is suitable for ambient temperatures between 0°C (32°F) and 60°C (140°F).