Honeywell Modutrol IV M7285 User Manual

1 63-2202—3
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Installation ..................................................... 4
Settings and Adjustments..............................10
Operation and Checkout ..............................11
G. R. • Rev. 8-93 • ©Honeywell Inc. 1993 • Form Number 63-2202—3
The M72XX series Modutrol IV Motors are
used to control dampers and valves. The mo-
tors accept a current or voltage signal from an
electronic controller to position a damper or
valve at any point between open and closed.
■ Replaces M744S,T,Y and M745S,T,Y Motors.
■ M7261, M7274, M7281, M7284, and M7294 are
non-spring return motors; M7272, M7282, M7285,
and M7286 are spring return motors.
■ Oil immersed motor and gear train for reliable per-
formance and long life.
■ Wiring box provides NEMA 3 weather protection.
■ Actuator motor and circuitry operate from 24 Vac.
Models available with factory installed transformer
or an internal transformer can be field added.
■ Quick connect terminals standard—screw termi-
nal adapter available.
■ Adapter bracket for matching shaft height of older
motors is standard with replacement motors.
■ Nominal timing of 30 seconds for 90° stroke and
60 seconds for 160° stroke.
■ Valve and damper linkages, explosion proof hous-
ing, and auxiliary switches available as accessories.
■ Spring return motors are rated for 25 lb.-in. and
60 lb.-in torque.
■ Non-spring return motors are rated for 35 lb.-in.,
75 lb.-in., 150 lb.-in., and 300 lb.-in. torque.
■ Models available with adjustable start (zero) and
span.
■ Models available with 4 to 20 mA input signal.
■ Models available with 2 to 10 Vdc input signal.
■ Die-cast magnesium housing.
M7261, M7272, M7274, M7281,
M7282, M7284, M7285, M7286,
M7294 Modutrol IV Motors

Honeywell Modutrol IV M7285 Specifications

General

Brand	Honeywell
Model	Modutrol IV M7285
Category	Engine
Language	English

Summary

Specifications

Controller Compatibility

Details compatibility with electronic controllers providing proportional current output.

Motor Rotation Explained

Defines motor rotation limits and states like mechanically/electrically normally closed/open.

Stroke Options

Describes fixed 90°/160° strokes and field adjustable strokes.

Stroke Timing

Specifies nominal timing for 90° (30 sec) and 160° (60 sec) strokes.

Shaft Load Limits

Provides dead weight load limits for the motor shaft.

Ambient Temperature Ratings

Specifies the acceptable operating ambient temperature range for the motors.

Shaft Dimensions

Details the dimensions of the motor shaft.

Overall Dimensions

Refers to Figure 1 for detailed physical dimensions of the motors.

Ordering Information

Installation Guide

Location Selection

Provides guidance on selecting an appropriate installation location for the motor.

Motor Mounting Procedures

Details the correct procedure for mounting the motor in a horizontal position.

Adapter Bracket Usage

Explains the purpose and mounting procedure for the adapter bracket.

Linkage Connections

Describes how to use the adapter bracket with various valve and damper linkages.

Wiring the Motor

Covers electrical connections, wiring box, and terminals for motor setup.

Auxiliary Switch Installation

Explains the function and connection of auxiliary switches.

Settings and Adjustments

Zero and Span Adjustment

Procedure for setting zero and span on specific motor models.

Auxiliary Switch Setting

Step-by-step guide for adjusting auxiliary switch cams and settings.

Operation and Checkout

Motor Operation Principles

Explains how the motor feedback and control circuits function.

Installation Checkout

Key checks to perform after installation and linkage adjustment.

Motor Operation Verification

Specific steps to confirm the motor operates correctly as per input.