Honeywell Modutrol IV M72 Series Manual

M7261, M7272, M7274, M7281,

M7282, M7284, M7285, M7286,

M7294 Modutrol IV Motors

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.

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

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63-2202-3