Honeywell Modutrol IV M7284 Operation manual

Series 72
Modutrol IV™ Motors
FEATURES
PRODUCT DATA
APPLICATION
The Series 72 Modutrol IV Motors are spring return and non-
spring return motors used to control dampers and valves. The
motors accept a current or voltage signal from an electronic
controller to position a damper or valve at any point between
open and closed.
• Replaces M734H,J,; M744S,T,Y; and M745L,S,T,Y
Motors.
• M7284, and M7294 are non-spring return motors;
M7285 are spring return motors.
• Integral spring return returns motor to normal position
when power is interrupted.
• Integral junction box provides NEMA 3 weather
protection.
• Motor and circuitry operate from 24 Vac. Models
available with factory installed transformer, or a field
added internal transformer.
• Quick-connect terminals are standard—screw terminal
adapter is available.
• Adapter bracket for matching shaft height of older
motors is available.
• Most motors have field adjustable stroke (90° to 160°).
• Die-cast aluminum housing.
• Integral auxiliary switches are available factory
mounted, or can be field added.
• Nominal timing standard of 30 seconds (90° stroke),
and 60 seconds (160° stroke). Other timings available.
• Spring return motors can operate valve linkages from
power end or auxiliary end shafts for normally closed
or normally open valve applications.
• All models have dual shafts (slotted and tapped on
both ends).
• All models have auxiliary switch cams.
• Fixed torque throughout the entire voltage range.
• Motors are designed for either normally open or
normally closed valves and dampers.
• 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.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 5
Settings and Adjustments ................................................. 8
Operation and Checkout ................................................... 11
Based on 63-2640—08

SERIES 72 MODUTROL IV™ MOTORS
Lead Color Primary Voltage
Brown 24 VAC
White 120 VAC
Blue 230 VAC
Black Common
SPECIFICATIONS
Models: TRADELINE models are selected and packaged to
provide ease of stocking, ease of handling and maximum
replacement value. TRADELINE model specifications are the
same as those of standard models unless specified otherwise.
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
an individual unit may not exactly match the listed
specifications. Also, this product is tested and
calibrated under closely controlled conditions and
some minor differences in performance can be
expected if those conditions are changed.
Modutrol IV Order Number Guide: See Table 4.
Dimensions: See Fig. 2.
Lifetime
60,000 Full Stroke Cycles
Repositions: 1.5 Million
Controller: These motors can be used with any electronic
controller that provides a stable noise-free proportional
current output as specified in Electrical Ratings, Input
Range below.
Electrical Ratings:
Power Consumption: See Table 1.
Input Range:
Current, Nonadjustable: 4 to 20 mA nominal, 25 mA
maximum.
Current, Adjustable: 4 to 20 mA adjustable, 50 mA
maximum.
Zero/Null (Motor Closed): 0.0 to 18 mA.
Span: 1.8 to 20 mA.
Voltage, Nonadjustable: 2 to 10 Vdc.
Input Impedance:
4 to 20 mA Input: 100 ohms.
2 to 10 Vdc Input: 400K ohms.
Auxiliary Switch Ratings (in Amps): See Table 2.
Stroke: Most models available with field adjustable strokes
from 90° to 160°. Stroke adjusted by means of
potentiometers located in the wiring compartment.
Timing: Nominal 30 seconds for 90° stroke and 60 seconds
for 160° stroke.
Dead Weight Load On Shaft: 200 lb (91 kg) on motor power
or auxiliary end; maximum combined load of 300 lb (136 kg).
Ambient Temperature Ratings: -40 to 150°F (-40 to 66°C).
Shaft: 3/8 in. (9.5 mm) square.
Motor Rotation:
Closed: Counterclockwise rotation limit as viewed from motor
power end.
Mechanically Normally Closed: Spring return. Normally closed
motors rotate to closed position on power loss.
Electrically Normally Closed: Both spring return and non-
spring motors return to closed position on minimum signal.
Table 1. Series 72 Modutrol IV Motor Power
Consumption Ratings (at 120 Vac, 50/60 Hz).
Model
Power Consumption
VA Watts
M7284 15 13
M7285 20 18
M7294 15 13
Table 2. Auxiliary Switch Ratings (in Amps).
One Contact
Rating
a
120V 240V
Full Load 7.2 3.6
Locked Rotor 43.2 21.6
a 40 VA pilot duty, 120/240 Vac on opposite contact.
Approvals:
Underwriters Laboratories Inc. Listed: File No. E4436; Guide
No. XAPX for USA and Canada.
U.S. Patents: pending
Europe: EMCD 2004/108/EC and LVD: 2006/95/EC
Table 3. Primary 50017460-001 Color Code
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number. 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 Environmental and Combustion Controls Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech
Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.
Based on 63-2640—08 2

SERIES 72 MODUTROL IV™ MOTORS
3 Based on 63-2640—08
Fig. 1. Stroke
ASYMMETRICAL MOTORS SYMMETRICAL MOTORS
VERTICAL
REFERENCE
FULLY CLOSED
10
90
VERTICAL
REFERENCE
FULLY CLOSED
10
160
VERTICAL
REFERENCE
45
FULLY
CLOSED
VERTICAL
REFERENCE
10 FULLY CLOSED
160
FULLY OPEN
90
FULLY
OPEN
FULLY OPEN
90 DEGREE STROKE 160 DEGREE STROKE
SPRING RETURN MOTORS AND NON-SPRING RETURN MOTORS
FULLY OPEN
90 DEGREE STROKE 160 DEGREE STROKE
NON-SPRING RETURN MOTORS
M31079
Table 4. Modutrol IV Motors Series 2 and 3 Model Number Guide.
MMoto
r
72 4-20 mA or 2-10 Vdc Control
860 lb-in. Sp
r
ing Return 150 lb-in. Non-Sp
r
ing Return
9— 300 lb-in. Non-Sp
r
ing Return
4Dual-ended shaft Non-Sp
r
ing Return
5Normally Closed Sp
r
ing Return
Q
a
2 Auxiliary Switches Adjustable Stro
k
e * Normally Closed
M72 84F
X
XXX See Catalogs fo
r
Complete Model Numbe
r
a Adjustable zero and span.
* Fixed stroke on M7284Q1082, and M7284Q1090

SERIES 72 MODUTROL IV™ MOTORS
Based on 63-2640—08 4
TOP VIEW TOP VIEW OF BRA CKET
4-7/8
(124) 4-1/4
(107)
5-1/2
(140)
4-5/8
(116)
2-5/16
(58)
5-13/16
(148)
11/16
(17)
1/4
(7)
13/16
(20)
13/16
2 (20)
POWER END
4-7/8 (124)
1/4 (7)
3
5-1/2 (140)
1-1/2 (37)
4-1/16 (103) 1-1/2 (37) 5-9/16 (141)
JUNCTION
BOX
3/4
(19)
A UXILIAR Y POWER
MOTOR
6-7/16
(164)
5-3/8
SPRING RETURN MODEL SHOWN
END END (137)
2-9/16
(66)
1 FOR 60 LB-IN. SPRING RETURN MODELS 8-3/4 (222).
FOR NON-SPRING RETURN MODELS 7-5/16 (185).
2 FOR 60 LB-IN. SPRING RETURN MODELS (SHOWN).
3 FOR NON-SPRING RETURN MODELS.
9/16 (15)
1
ADAPTER
BRACKET
3/4
(19)
M18998D
Fig. 2. Series 72 Modutrol IV Motor dimensions in inches (mm).

SERIES 72 MODUTROL IV™ MOTORS
5 Based on 63-2640—08
Accessories:
220736B Internal Auxiliary Switch Kit; two switches, can be
field-installed on TRADELINE models.
220738A Adapter Bracket raises motor shaft height by 3/4 in
(19 mm) to match that of previous Modutrol Motor models.
220741A Screw Terminal Adapter converts the standard quick-
connect terminals to screw terminals.
221455A Infinitely Adjustable Crank Arm, can rotate through
downward position and clear motor base without requiring
an adapter bracket.
4074ERU Weatherproofing Kit provides NEMA 3 rating for
Modutrol IV Motors mounted in position other than upright.
50017460-001 Internal Transformer; 24/120/230 Vac 50/60 Hz
primary, 24 Vac secondary, quick connect terminals.
7617ADW Crank Arm, can rotate through downward position
and clear motor base without requiring an adapter bracket.
Q100 Linkage connects Modutrol Motor to V51 Butterfly Valve.
Requires the 220738A Adapter Bracket.
Q181 Auxiliary Potentiometer for sequence or unison control of
1 to 4 additional modulating (Series 90) motors.
Q209E,F Manual Potentiometer for Modutrol Motors
Q5001 Bracket and Linkage Assembly connects Modutrol IV
Motor to water or steam valve.
Q605 Damper Linkage connects motor to damper. Includes
motor crank arm.
Q607 External Auxiliary Switch controls auxiliary equipment as
a function of motor position.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect all power supplies before installation.
Motors with auxiliary switches can have more than one
disconnect.
CAUTION
Equipment Damage Hazard.
Can damage the motor beyond repair.
Never turn the motor shaft by hand or with a wrench.
Forcibly turning the motor shaft damages the gear train
and stroke limit contacts.
IMPORTANT
Always conduct a thorough checkout when
installation is complete.
Location
Allow enough clearance for accessory installation and motor
servicing when selecting a location (see Fig. 2). If located
outdoors, use liquid-tight conduit connectors with the junction
box to provide NEMA 3 weather protection. If mounted
outdoors in a position other than upright, install a 4074ERU
Weatherproofing Kit and liquid-tight connectors to provide
NEMA 3 protection.
CAUTION
Motor Damage Hazard.
Deteriorating vapors and acid fumes can damage
metal parts.
Install motor in areas free of acid fumes and other
deteriorating vapors.
In excessive salt environments, mounting base and screws
should be zinc or cadmium plated, not stainless steel or brass.
Use the 220738A Adapter Bracket for mounting on these
surfaces.
Mounting
Use the following guidelines for proper motor mounting:
• Always install motors with the crankshaft horizontal.
• Mounting flanges extending from motor housing base are
drilled for 1/4 inch (6.4 mm) machine screws or bolts.
• Non-Spring Return Motors are shipped from the factory in
the closed position (at the counterclockwise rotation limit, as
viewed from the motor power end).
• Spring Return Motors are shipped from the factory in their
normal position.
• Normally closed models are shipped at the counterclockwise
rotation limit, as viewed from the motor power end.
Adapter Bracket
The 220738A Adapter Bracket, positioned between the motor
and the equipment, raises motor shaft height by 0.75 in.
(19 mm) to match that of previous Modutrol Motor models.
The following applications require this bracket:
• Q607 External Auxiliary Switch.
• Damper linkage applications requiring added clearance to
allow:
— Crank arm rotation through the downward position.
— Sufficient damper linkage to reach the motor shaft.
• All valve linkages except the Q5001.
NOTE: When the bracket is not used in a replacement
application, the damper linkage requires adjust-
ment for the new shaft position.
To mount the motor with the bracket:
1. Mount the bracket to the equipment with existing or stan-
dard bolts.
2. Using the provided bolts, mount the motor to the bracket
threaded holes. See Fig. 3.
For valve linkage applications (other than the Q5001):
1. Mount the bracket to the linkage.
2. Position the motor on the bracket to align the motor shaft
with the linkage.

SERIES 72 MODUTROL IV™ MOTORS
Based on 63-2640—08 6
3. Attach the motor to the bracket with the four bolts
provided. See Fig. 4.
STANDARD
BOLTS (4)
1
BOLTS
PROVIDED (4)
WIRING
BOX
MOTOR
ADAPTER
BRACKET
EQUIPMENT
BASE
1 #12 OR 1/4" ZINC PLATED
MACHINE SCREWS OR BOLTS
NON-SPRING RETURN SPRING RETURN
M18999
Damper Linkages
Fig. 3. Mounting the motor with an adapter bracket.
For detailed instructions on specific linkage assemblies, refer
to the instruction sheet packed with the linkage. In general,
The motor does not include a crank arm. Order the crank arm
separately (see Accessories in the Specifications section). For
detailed instructions on the assembly of specific linkages, refer
to the Installation Instructions packed with the linkage.
CAUTION
Equipment Damage Hazard.
Stalling a motor can damage the drive shaft.
Ensure installation of motors and linkages allows the
motor to drive through full stroke without obstruction.
Valve Linkages
The Q100 Linkage requires a 220738A Adapter Bracket for all
valve applications. Applications with the Q5001 Valve Linkage
do not require the 220738A Adapter Bracket (see Fig. 4).
check the following points when installing a motor and linkage:
• Adjust valve and louver-type damper linkages so the damper
or valve moves through only the maximum required distance
while the motor moves through its full stroke.
• With modulating control, maximum damper opening should
be no more than 60 degrees. Little additional airflow is
provided beyond this point.
• Do not exceed load and torque ratings in any application.
Junction Box
When used with liquid-tight conduit connectors, the junction
box provides NEMA 3 weather protection for the motor. The
junction box, standard with replacement motors, encloses the
terminals and provides knockouts for wiring conduits. Housing
an internal transformer or internal auxiliary switches requires
using a junction box.

SERIES 72 MODUTROL IV™ MOTORS
7 Based on 63-2640—08
3. Replace wiring box cover.
POWER
END OF
JUNCTION
BOX
MOTOR
CONTROLLER
MOTOR
T1
T2
24V
1
L1
(HOT)
L2
Q5001
VALVE
LINKAGE
MOTOR - -
+ +
F 2
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQURED.
2 CONNECTING F TO – WILL DRIVE MOTOR TO FULLY OPEN.
VALV E
1/4-20 UNC
1 in. LONG
MOUNTING
BOLTS
Fig. 5. Typical system wiring.
M5778
M18994
Fig. 4. Mounting the motor on a Q5001 Valve Linkage.
Wiring
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment circuitry.
Disconnect all power supplies before installation.
Motors with auxiliary switches can have more than one
disconnect.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
1. Ensure that the voltage and frequency stamped on the
motor correspond with the power supply characteristics.
2. When connecting several motors in parallel, ensure that
the power supply VA rating is large enough to provide
EXTERNAL POTENTIOMETER
power to all motors used without overloading.
3. Fig. 10 shows that motor terminals are quick-connects
located on top of the printed circuit board.
4. To access the wiring compartment:
a. Remove the four screws from the junction box top.
b. Lift off the cover.
5. Refer to Fig. 5 through 8 for wiring.
Wire the motor as follows:
1. Remove the wiring box cover by removing the four
screws holding the cover to the motor.
2. Wire motor to system using quick-connect terminals in
wiring box.

SERIES 72 MODUTROL IV™ MOTORS
Based on 63-2640—08 8
4-20 mA
CONTROLLER
-
MOTOR
- T1
L1 L2
(HOT) 1
SETTINGS AND ADJUSTMENTS
Before Setting Stroke
1. Remove the top cover from the motor.
+ + T2
F 2
MOTOR
- T1
+ T2
F 2
MOTOR
- T1
+ T2
F 2
2. Disconnect the controller from the motor.
3. For models with an internal transformer (line voltage
motors), ensure that power (and nothing else) remains
connected to the motor.
IMPORTANT
Detach linkage from motor before adjusting stroke.
CAUTION
Careless Installation Hazard.
Use of excessive force while adjusting cams
damages the motor.
To avoid damaging motor end switches, set cams by
moving only the screwdriver top.
CAUTION
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQURED.
2 CONNECTING F TO – WILL DRIVE MOTOR TO FULLY OPEN.
MOTORS FUNCTION INDEPENDENTLY.
M31109
Fig. 8. Driving up to six motors from
one 4 to 20 mA controller.
Equipment Damage Hazard.
Can damage the motor beyond repair.
Never turn the motor shaft by hand or with a wrench.
Forcibly turning the motor shaft damages the gear train
and stroke limit contacts.
Adjustable Stroke
All models except for M7284Q1082
and M7284Q1090.
When viewing from the power end of the motor, the stroke
potentiometer is to the far left. To set the stroke to 160°
(maximum position) turn the potentiometer fully clockwise
, using a 1/8 in. straight-blade screwdriver. To set the
stroke at 90° (minimum position) turn the potentiometer fully
counter-clockwise . Setting the potentiometer anywhere
between fully clockwise and fully counter-clockwise will set the
stroke between 160° and 90°.
ADJUSTABLE
STROKE
POTENTIOMETER
POWER END
OF MOTOR
AUXILIARY
SWITCH CAMS
M13699
Fig. 9. Stroke adjustment setup

SERIES 72 MODUTROL IV™ MOTORS
9 Based on 63-2640—08
START ADJUST MIN MAX
SPAN ADJUST MIN MAX
Zero and Span Adjustment for
M7284Q, M7285Q, and M7294Q
M7284Q, M7285Q, and M7294Q actuators have the capability
of adjustable zero and span. Fig. 10 shows the module with the
zero and span potentiometers.
Zero: Sets input voltage to define the 0% angle of rotation. It is
factory set to minimum position and can be adjusted to the
maximum position of 20mA or 10V.
Span: Adjusts motor response to travel a full stroke through
the selected input span. It is factory set to maximum position,
and is adjustable from 4-20mA or 2-10Vdc.
1. Adjust the start potentiometer fully clockwise (maximum
zero) and the span potentiometer fully counterclockwise
(minimum span). See Fig. 10.
2. Set the controller current to the value required to drive
the motor to the closed position.
3. Turn the start potentiometer slowly counterclockwise
until the motor begins to open. This is defined as the
start or zero setting.
4. Set the controller current to the value required to drive
the motor to the fully open position. The motor will open.
5. Turn the span potentiometer clockwise until the motor
starts to close. The difference between the fully open
span position current and the zero position current is
defined as the operating span.
6. Recheck the start and readjust the span potentiometer if
necessary. Turn the start potentiometer clockwise to
increase the zero position.
7. Recheck the span and readjust the span potentiometer if
necessary. Turn it clockwise to increase the full span
position.
8. For sequential operation, as shown in Fig. 11, repeat the
above steps for each motor.
A
B
RIGHT/INNER
AUXILIARY SWITCH
(+)
RIGHT/INNER
AUXILIARY SWITCH
F (TEST)
V(-)
INNER AUXILIARY
SWITCH CAM (BLUE)
INNER AUXILIARY
F SWITCH CAM (BLUE)
Y(+)
T2
T1
POWER
END
OUTER AUXILIARY
SWITCH CAM (RED)
LEFT/OUTER
AUXILIARY SWITCH
1
(-)
T2
T1
POWER
END
OUTER AUXILIARY
SWITCH CAM (RED)
LEFT/OUTER
AUXILIARY SWITCH
NOTE: FEATURES AVAILABLE ON SOME MODELS ONLY. NOTE: FEATURES AVAILABLE ON SOME MODELS ONLY.
2 TO 10 VDC INPUT MOTORS 4 TO 20 mA NONADJUSTABLE INPUT MOTORS
1 RESOLUTION POTENTIOMETER, 160 ON M7284Q1082,
AND M7284Q1090
C
SPAN ADJUST POTENTIOMETER
RIGHT/INNER
AUXILIARY SWITCH
(+)
F
(–)
T2
T1
INNER AUXILIARY
SWITCH CAM (BLUE)
POWER
END
OUTER AUXILIARY
SWITCH CAM (RED)
LEFT/OUTER
AUXILIARY SWITCH
START ADJUST POTENTIOMETER
NOTE: FEATURES AVAILABLE ON SOME MODELS ONLY.
4 TO 20 mA ADJUSTABLE INPUT MOTORS
M13648A
Fig. 10. Terminals and adjustments.

SERIES 72 MODUTROL IV™ MOTORS
Based on 63-2640—08 10
CONTROL OUTPUT
mA CURRENT (OR VOLTS DC)
SEQUENTIAL OPERATION
FOR ADJUSTABLE ZERO AND SPAN
MODELS
20
(10)
16
(8)
12
(6)
8
(4)
Motors with factory added auxiliary switches are shipped in the
closed position (fully counterclockwise, as viewed from the
motor power end) with auxiliary cams set to actuate switches
30° from the closed position and to provide 1° degree
differential. With the motor in the closed (fully counter-
clockwise) position, the auxiliary switch breaks contacts R-B.
See Fig. 12 for auxiliary switch wiring.
Series 2 Motors are shipped with auxiliary switch cams that
permit acceptance of 220736A,B Internal Auxiliary Switch Kits.
Refer to 220736A,B Installation Instructions.
Auxiliary Switch Adjustment
4
(2)
0
CLOSED OPEN CLOSED OPEN CLOSED OPEN
MOTOR 1 MOTOR 2 MOTOR 3
IMPORTANT
When adjusting the auxiliary switch cams use the
following procedure:
1. Insert 1/8 in. screwdriver blade into a slot on cam and
move the screwdriver top as far as possible in the
required direction. See Fig. 12.
1 3 3 3 2
1 MOTOR 1 PROPORTIONS BETWEEN 4 AND 12 mA; FULLY
CLOSED AT 4 mA, FULLY OPENED AT 12 mA.
MOTOR 2 PROPORTIONS BETWEEN 8 AND 16 mA; FULLY
CLOSED AT 8 mA, FULLY OPENED AT 16 mA.
MOTOR 3 PROPORTIONS BETWEEN 12 AND 20 mA SIGNAL;
FULLY CLOSED AT 12 mA, FULLY OPENED AT 20 mA.
2 UP TO 6 MOTORS CAN BE DRIVEN SEQUENTIALY OR IN
UNISON FROM ONE CONTROLLER.
3 ADJUST ZERO ADJUST AND SPAN ADJUST POTENTIOMETERS
2. Repeat step 1 in successive cam slots until the cam is
in the required position.
NOTE: Series 2 Motors are shipped with auxiliary switch
cams that permit acceptance of 220736A,B Inter-
nal Auxiliary Switch Kits. Refer to
220736A,B Installation Instructions.
Use the following procedure to obtain the desired auxiliary
switch settings:
1. Remove the top cover from the motor to gain access
TO ACHIEVE DESIRED SEQUENCE. M2893A to the motor terminals and auxiliary cams.
2. Disconnect the controller from the motor.
Fig. 11. Sequential operation of motors.
Enhanced Resolution
M7284Q1082, and M7284Q1090
These four motors have enhanced resolution with 160
repositions (steps) from 90 degrees to 160 degrees stroke.
Auxiliary Switches
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect all power supplies before installation.
Motors with auxiliary switches can have more than one
disconnect.
CAUTION
Equipment Damage Hazard.
Can damage the motor beyond repair.
Never turn the motor shaft by hand or with a wrench.
Forcibly turning the motor shaft damages the gear train
and stroke limit contacts.
Adjustable cams actuate the auxiliary switches. These cams
can be set to actuate the switches at any angle within the
motor stroke. Select switch differential of 1° or 10°.
3. Connect a current source to the positive and negative
terminals.
4. Drive the motor to the position where the auxiliary equip-
ment is to be switched by increasing or decreasing the
current.
5. For a switch differential of 1°, check continuity of auxiliary
switch contacts R-B and rotate the cam as follows:
a. If the contacts are open, rotate the cam clockwise
until the R-B contacts close.
b. If the contacts are closed, rotate the cam
counterclockwise until the R-B contacts open.
6. For a switch differential of 10° rotate the cam
approximately 180° so the slow-rise portion of the
cam actuates the switch.
7. Check continuity of the auxiliary switch contacts R-B.
8. Rotate the cam as follows:
a. If the contacts are open, rotate the cam
counterclockwise until the R-B contacts close.
b. If the contacts are closed, rotate the cam clockwise
until the R-B contacts open.
c. Make final adjustment in the proper direction to
obtain contact make or break at the desired position.
9. Check for the proper differential and switching of the aux-
iliary equipment by driving the motor though the full
stroke in both directions.
10. Disconnect power, remove current source, reconnect the
controller, and replace the top cover on the motor.
NOTE: Changing the differential from 1° to 10° reverses
the switching action. For example, with a 10° dif-
ferential, switch contacts R-B make and R-W
break on a
counterclockwise (closed) rotation. With a 1°
differential, switch contacts R-W make and R-B
break on a counterclockwise (closed) rotation.

SERIES 72 MODUTROL IV™ MOTORS
11 Based on 63-2640—08
F
F
.)
1/8 INCH
MOVE SCREWDRIVER AT
TOP ONLY TO ADJUST CAM. NOTE: CAMS ARE OFFSET
VERTICALLY TO PROVIDE
BETTER VIEW OF BACK CAM.
STRAIGHT-BLADE
SCREWDRIVER
SLOW RISE
PORTION
(APPROX.
10 DIFF.)
INNER
AUXILIARY
CAM
(BLUE)
RIGHT/INNER
AUXILIARY
SWITCH
FAST RISE
PORTION
(APPROX.
1 DIFF.)
LEFT/OUTER
AUXILIARY
SWITCH
FAST RISE
PORTION
(APPROX.
1 DI
MOTOR
OPEN
OUTER
AUXILIARY
CAM
(RED)
POWER
END
SLOW RISE
PORTION
(APPROX.
10 DIFF.)
MOTOR
CLOSE
LEFT/OUTER
AUXILIARY
SWITCH
POWER END
OF MOTOR
RIGHT/INNER
AUXILIARY SWITCH
INNER AUXILIARY
CAM (BLUE)
OUTER AUXILIARY
CAM (RED)
M17101
Fig. 12. Auxiliary switch adjustment.
OPERATION AND CHECKOUT
Operation
The internal shaft position feedback potentiometer in
conjunction with the actuator microprocessor and modulating
input circuit form a control loop. When the external controller’s
output remains at a fixed amplitude the actuator’s shaft position
is held at a position proportional to that input amplitude. When
the value of the external controllers output changes the
actuator responds by initiating movement of the motor to
proportionately compensate for the change in input amplitude.
When the motor reaches the control loop balance point the
system is again in a static state and the actuator holds position
until the next change of input from the external controller.
Checkout
After installation and linkage adjustment, operate the motor
through the controller. Make sure that:
• The motor properly operates the damper or valve.
• The motor responds properly as the input is varied.
• The auxiliary switch, if used, operates at the desired point of
motor rotation.
Inspect the motor, linkage, and valve or damper to see that all
mechanical connections are correct and secure.
In damper installations, the pushrod should not extend more
than a few inches past the ball joints. Check to see that there is
adequate clearance for the linkage to move through its stroke
without binding or striking other objects.
See controller or system instructions for additional checkout
procedures.
Motor Operation Checkout
For motors with F, + and - terminals:
To close the motor, open terminals +, -, and F.
To open the motor connect terminal F to positive (+) or
negative (-).
NOTE: DO NOT SHORT + to -

SERIES 72 MODUTROL IV™ MOTORS
Automation and Control Solutions
Honeywell Industrial Combustion
Luchthavenlaan 16
1800 Vilvoorde
Belgium
hic.emea.honeywell.com
® U.S. Registered Trademark
© 2012 Honeywell International Inc.
Based on 63-2640—08 M.S. Rev. 10-12
Printed in Europe