Honeywell Modutrol IV M72 Series 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 M72 Series Specifications

General

Brand	Honeywell
Model	Modutrol IV M72 Series
Category	Engine
Language	English

Summary

Specifications

CONTROLLER

Describes the type of electronic controller compatible with the motors.

MOTOR ROTATION

Defines motor rotation for closed and open positions, and spring return behavior.

STROKE

Details available stroke lengths and adjustment options.

TIMING

Specifies the nominal timing for 90° and 160° strokes.

DEAD WEIGHT LOAD ON SHAFT

Indicates maximum load capacities for the motor shaft.

AMBIENT TEMPERATURE RATINGS

Provides the acceptable operating temperature range for the motors.

SHAFT

Specifies the dimensions and type of the motor shaft.

DIMENSIONS

Refers to the diagrams showing motor physical measurements.

Ordering Information

Installation

LOCATION

Guidance on selecting an appropriate installation site and environmental considerations.

MOUNTING

Instructions on how to physically mount the motor.

ADAPTER BRACKET

Details on using the adapter bracket for shaft height adjustment.

LINKAGES

Information on connecting motors to dampers or valves using linkages.

Settings and Adjustments

AUXILIARY SWITCH SETTING PROCEDURE

Steps to adjust and set auxiliary switches for specific motor positions.

ZERO AND SPAN ADJUSTMENT FOR M7284Q AND M7285Q MOTORS

Procedure for setting zero and span for specific motor models.

Operation and Checkout

OPERATION

Explains how the motor operates using feedback and control current.

CHECKOUT

Steps to verify proper installation and motor response.

Motor Operation Checkout

Specific procedure for checking the motor's operational functions.