Honeywell ML7999A User Manual

PRODUCT DATA
65-0239-2
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved
ML7999A
Universal Parallel-Positioning Actuator
APPLICATION
ML7999A Universal Parallel-Positioning Actuator provides
100 lb-in. torque, pulse-width-modulating (PWM) control of
combustion air dampers, butterfly gas valves, oil modulation
valves, and flue gas recirculation systems. The actuator
includes a precision feedback potentiometer and integral
power supply capable of direct line voltage connection. The
ML7999A Actuator is part of the ControLinks™ Control
System, and must be used with the R7999 ControLinks™
Controller.
FEATURES
• Universal power supply input.
• Password protected with an eight-digit hexadecimal
identification signal.
• 100 lb-in. (11.3 Nm) torque.
• Includes integral position feedback potentiometer.
• Separate wiring compartment between line voltage
power wiring and low voltage control.
• Direct coupling shaft interface mounting.
• Couples directly to a 1/2 in. (13 mm) shaft with no
additional parts required.
• Couples directly to 5/16 in. (8 mm) and 3/8 in. (9 mm)
shafts using available self-centering shaft reduction
accessories.
• Shaft coupler assembly available for shafts larger than
1/2 in.
• Bracket Accessory Kit available for mounting to
Honeywell V51 Butterfly Gas Valves.
• Visual indication of actuator position.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Wiring ............................................................................... 4
Operation .......................................................................... 5
Checkout And Troubleshooting ........................................ 5

Honeywell ML7999A Specifications

General

Brand	Honeywell
Model	ML7999A
Category	Controller
Language	English

Summary

Product Data

Application Overview

Details the actuator's use for combustion air dampers, gas valves, and flue gas recirculation systems.

Key Features

Highlights universal power supply, password protection, torque, feedback potentiometer, and wiring compartment.

Specifications

Model and Electrical Ratings

Defines the ML7999A model and its power input, consumption, and hardwiring requirement.

Environmental and Performance Specs

Covers temperature, humidity, vibration, control signal, stroke, accuracy, torque, design life, timing, and noise.

Mounting and Approvals

Details mounting options, position indicator, certifications, and enclosure type.

Accessories

Lists available shaft adapters and mounting brackets for various valve types.

Installation

Installation Precautions and Location

Advises careful reading, checking ratings, and installing in areas free of fumes.

Actuator Mounting Procedures

Guides on placing, seating, and securing the actuator on a shaft, with torque specifications.

Wiring

Wiring Safety and Requirements

Warns about electrical shock and specifies compliance with codes and low voltage requirements.

Grounding and Preparation

Details earth ground, shield ground connections, and wiring preparation for low/line voltage.

Wiring Procedures

Outlines steps for removing the cover, wiring low-voltage and line-voltage circuits.

Operation and Troubleshooting

On-Board LED Indications

Explains the meaning of LED states: Fast Blink, Slow Blink, and Steady On.

Actuator Setup

Describes the auto seek open/closed function for determining actuator stroke.

Troubleshooting Steps

Provides guidance on checking power, signals, stroke, and mechanical binding.