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Honeywell Modutrol IV M72 Series Manual

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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
1
63-2202-3

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  Summary of Contents for Honeywell Modutrol IV M72 Series

  • Page 1: Table Of Contents

    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 63-2202—3...
  • Page 2: Specifications

    If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Home and Building Control Sales Office (check white pages of your phone directory). 2. Home and Building Control Customer Satisfaction Honeywell Inc., 1885 Douglas Drive North...
  • Page 3 M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 SPECIFICATIONS Fig. 1—Dimensions of M7261, M7272, N7274, M7281, M7282, M7284, M7285, M7286, M7294 Modutrol IV Motors in in. [mm]. TOP VIEW OF BRACKET ONLY 4.88 4.22 [124] [107] 3.93 5.82 [100] [148] 5.37 [136] [140] [58] [11] [17] POWER END .50 [13] [20] .27 [7]...
  • Page 4: Installation

    M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 SPECIFICATIONS • INSTALLATION ELECTRICAL RATINGS: from Nelson Electric Co. Requires Honeywell Voltage and Frequency: 120 Vac, 50/60 Hz. 7616DM Coupling. M7261: 19W, 0.20A M7282: 28W, 0.28A Q607 External Auxiliary Switch; controls auxiliary equip- M7272: 26W, 0.26A M7284: 23W, 0.24A ment as a function of motor position.
  • Page 5 M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 INSTALLATION MOUNTING ADAPTER BRACKET Always mount the motor with the shaft in a horizontal The 220738A Adapter Bracket, positioned between the position. Mounting flanges extending from the bottom of motor and the equipment, raises the motor shaft height by the motor housing are drilled for 1/4 in.
  • Page 6 M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 INSTALLATION Fig. 3—Mounting the motor with an adapter bracket. BOLTS STANDARD PROVIDED (4) BOLTS (4) WIRING MOTOR POWER POWER ADAPTER BRACKET EQUIPMENT BASE 1 #12 OR 1/4" ZINC PLATED MACHINE SCREWS OR BOLTS SPRING RETURN NON-SPRING RETURN M452D...
  • Page 7 M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 INSTALLATION Fig. 4—Mounting Modutrol IV Motor on Q618 Valve Linkage. BOLTS PROVIDED (4) POWER END OF MOTOR WIRING BOX STANDARD VALVE BOLTS LINKAGE MOTOR ADAPTER BRACKET NON-SPRING RETURN VALVE BOLTS PROVIDED (4) POWER END OF MOTOR WIRING BOX MOTOR SPRING RETURN 1 #12 OR 1/4'' ZINC PLATED MACHINE SCREWS OR BOLTS.
  • Page 8 M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 INSTALLATION WIRING supply 24 Vac power to the motor. Make sure that the Disconnect power supply before beginning wiring to power requirements stamped on the motor correspond to prevent electrical shock or equipment damage. All wir- the characteristics of the power supply. ing must comply with applicable local codes, ordi- The motor terminals are quick-connects located on top nances, and regulations.
  • Page 9 M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 INSTALLATION Fig. 6—Internal schematic of Series 72 Motors. Fig. 8—Driving up to six motors from one 4 to 20 mA controller. – (HOT) 4-20 mA CONTROLLER MOTOR BRAKE CIRCUITRY ELECTRONIC CIRCUIT (HOT) TRIAC TRIAC SWITCHING SWITCHING MOTOR FEEDBACK POTENTIOMETER OPEN CLOSE LIMIT...
  • Page 10: Settings And Adjustments

    M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 SETTINGS AND ADJUSTMENTS Settings and Adjustments ZERO AND SPAN ADJUSTMENT FOR M7284Q AUXILIARY SWITCH SETTING PROCEDURE AND M7285Q MOTORS (See Fig. 5.) (See Fig. 10) 1. Adjust the start potentiometer fully clockwise CAUTION (maximum zero) and the span potentiometer fully counterclockwise (minimum span).
  • Page 11: Operation And Checkout

    M7261,M7272,M7274,M7281,M7282,M7284,M7285,M7286,M7294 SETTINGS AND ADJUSTMENTS • OPERATION AND CHECKOUT Fig. 10—Auxiliary switch and adjustable cams. MOVE SCREWDRIVER AT TOP ONLY TO ADJUST CAM 1/8 IN. STRAIGHT-BLADE SCREWDRIVER RIGHT/INNER AUXILIARY SLOW RISE SWITCH PORTION (APPROX. 10° DIFF.) FAST RISE INNER PORTION AUXILIARY (APPROX.
  • Page 12 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 QUALITY IS Printed in U.S.A.