Honeywell Home Electric Linear Valve Actuators
ML6420A30xx / ML7420A60xx
Installation Instructions
Product Overview
This document provides installation instructions for the Honeywell Home ML6420A30xx and ML7420A60xx series of Electric Linear Valve Actuators. These actuators are designed for precise control of linear motion in HVAC systems.
Applicable models include:
- ML6420A3007
- ML6420A3015
- ML6420A3023
- ML6420A3031
- ML7420A6009
- ML7420A6017
Installation
The following steps detail the installation process for the valve actuators.
Step A1: Mounting to Valve Body
Description: Shows the actuator being mounted onto a valve body. Ensure a minimum clearance of 80 mm above the actuator and 100 mm clearance around the valve assembly for proper installation and access.
Step A2: Connecting Actuator to Valve Stem
Description: Illustrates connecting the actuator to the valve stem. The connection requires approximately 108 mm of stem travel. A 10 mm gap is indicated between the actuator and the valve bonnet. Connection points are labeled 'a', 'b', 'c', with internal sub-points 'a1', 'a2', 'a3' for precise alignment.
Step A3: Electrical Connections
Description: Depicts electrical wiring. The actuator requires either 24 Vac or 230 Vac power. Connection points are labeled 'a', 'b', 'c'. A gap of 4 to 5 mm is shown for wiring access and secure connections.
Step A4a: Wiring Diagram (24 V Models)
Description: Wiring diagram for ML6420A3007 and ML6420A3023 (24 V models). Connections are shown for 24 Vac power (terminals 1 and 2), and control signals (terminals 4 and 5).
- Terminal 1: 24 Vac Power Input
- Terminal 2: 24 Vac Power Input
- Terminal 4: Control Signal Input
- Terminal 5: Control Signal Input
Step A4b: Wiring Diagram (230 V Models)
Description: Wiring diagram for ML6420A3015 and ML6420A3031 (230 V models). Connections are shown for 230 Vac power (terminals L and N), and control signals (terminals 4 and 5).
- Terminal L: 230 Vac Power Input (Live)
- Terminal N: 230 Vac Power Input (Neutral)
- Terminal 4: Control Signal Input
- Terminal 5: Control Signal Input
Step A4c: Wiring Diagram (0/2...10 V Control)
Description: Wiring diagram for ML7420A6009 and ML7420A6017 (0/2...10 V control signal models). Shows connections for W1, W2, W3 (for signal selection and configuration), Y (position feedback signal), 24 Vac power (terminals 1 and 2), and control signals (terminals 4 and 5).
- W1, W2, W3: Configuration and signal selection terminals.
- Y: Position feedback signal output.
- Terminal 1: 24 Vac Power Input
- Terminal 2: 24 Vac Power Input
- Terminal 4: Control Signal Input
- Terminal 5: Control Signal Input
Step A5a, A5b, A5c: Setting Actuator Stroke/Position
Description: Diagrams illustrating how to set the actuator's stroke or position based on control signal inputs (e.g., 0/2...10 V or 2...10 V). These steps involve adjusting settings related to W1, W2, W3 and observing the output position (Y). Percentage indicators (0%, 50%, 100%) are used to show stroke positions.
Step A6: Manual Operation Activation
Description: Shows how to manually operate the actuator stem, typically by engaging a manual mode. This can be done with 24 Vac or 230 Vac power applied. The manual override allows setting the position to 0%, 50%, or 100% (corresponding to 2 V or 10 V signal equivalents).
Manual Operation
Description: Illustrates the manual override mechanism for the actuator. The diagrams show how to engage the manual mode and adjust the actuator stem position using a dial or lever, typically indicated by arrows and position indicators.
Dismounting
The following steps detail the dismounting process.
Step C1: Dismounting Actuator from Valve
Description: Shows the process of removing the actuator from the valve. It involves disengaging the manual override and then detaching the actuator. Percentage indicators (0%, 50%, 100%) are shown, likely related to the actuator's position during removal.
Step C2: Dismounting Sequence
Description: Depicts the sequence for dismounting, referencing previous installation steps in reverse order: A3, A4, A2, A1.
