### 63-2623 - Direct Coupled Actuators

```Direct Coupled Actuators
ENGINEERING GUIDE
Actuator Selection
Deciding what actuator will best fit your damper needs can
seem like a difficult task. However, these quick steps will help
you find the actuator you need quickly and effectively.
Use the procedure detailed below to find the total torque
requirements in pound-inches (lb-in.) and then proceed to the
following pages for simple questions to help select the proper
model to best suit your application.
STANDARD ACTUATOR SIZING
1.
2.
3.
known, enter that in Table 2.
unknown, use Table 1.
Enter this value in Table 2.
2
Determine Damper Area (sq ft):
π×r
a. For round dampers, use the equation: -------------144
b. For rectangular dampers
( length × width )
use the equation: --------------------------------------144
NOTE: 144 sq in. = 1 sq ft
4.
Enter the damper area value in Table 2.
Rated Torque (lb-in. per sq ft)
Air Velocity
feet per minute With Without With
Without Damper
(fpm)a
Seals Seals Seals Seals
up to 1000
7
4
5
3
10
1000-2500
10.5
6
7.5
4.5
14
2500-3500
14
8
10
6
20
a Assumes
x
pressure differential of less than or equal to
2 in. w.c. For larger differentials, consult the damper
manufacturer.
/ 144 =
Table 2. Torque Requirements Calculation.
Rated Torque
lb-in. per sq ft
x
Damper
Area
sq ft =
NOTE: Honeywell recommends adding 20 percent safety factors
Total Required Torque (lb-in.)
x 1.20
=
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ACTUATOR SELECTION
Table 3 provides questions to address before selecting your
actuator.
Table 3. Actuator Selection Checklist.
1.
Is Fail Safe Required?
Yes
! Spring Return
2.
3.
No
! Non-spring Return
What torque rating is needed for this application? (See Table 2.)
! 44 lb-in.
! 35 lb-in.
! 88 lb-in.
! 70 lb-in.
! 175 lb-in.
! 175 lb-in.
! 350 lb-in.
! 300 lb-in.
What control signal is needed for this application?
! 24 Vac, 2 Position
! 24 Vac, 2 Position and Floating
! 24 Vac, 2 Position with Auxiliary Switches
! 24 Vac, Proportional
! 24 Vac, Floating and Proportional
! 24 Vac, 2 Position and Floating with Auxiliary Switches
! 24 Vac, Floating and Proportional with Auxiliary Switches
! 24 Vac, Proportional with Auxiliary Switches
! 24 Vac, Floating and Proportional with Auxiliary Switches
! 120 Vac, 2 Position
! 120 Vac, 2 Position with Auxiliary Switches
Table 4. Fire and Smoke Actuator Selection Checklist.
IMPORTANT
— Always use a torque rating equal to or greater than
the calculated need.
— For Example: With a Total Required Torque
(calculated from Table 2) of 158 lb-in., select an
actuator rated for 175 lb-in.
— Selecting a Fast-Acting Two-Position Actuator
requires selecting a spring return direction (clockwise or counterclockwise).
Fast-Acting Two-Position Actuators
1.
Required torque rating (see Table 2).
! 30 lb-in. (3.4 N•m)
! 80 lb-in. (9 N•m)
! 175 lb-in. (20 N•m)
2.
Required voltage
! 24 Vac
3.
! 120 Vac
! 230 Vac
Required control signal for the application.
! Two-Position (NOTE: All Fast-Acting Two-Position
Actuators are Two-Position)
4.
Required actuator spring direction
! Clockwise Rotation
! Counterclockwise Rotation
! Rotation By Orientation
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2
ACTUATOR SELECTION
FIRE AND SMOKE APPLICATIONS
Table 5. Fire and Smoke Application Two-Position Actuators (Spring Return Fail-safe Mode).
Torque Rating
in lb-in. (N•m)
30 (3.4)
80 (9)
Voltage
(in Vac)
175 (20) 24 120 230
X
X
X
X
X
X
X
X
X
X
X
X
b
ML4115D1006
b
ML8115A1005
X
b
ML8115B1004
X
b
MS4209F1007
b
MS4309F1005
b
MS4709F1014
b
MS4809F1012
b
MS8209F1003
b
MS8309F1001
—
MS4120F1006
X
X
X
X
X
X
ML4115C1007
X
X
X
ML4115B1008
b
X
X
X
b
X
X
Model Number
ML4115A1009
X
X
Internal
Switches
b
X
X
X
CW or
CCWa
X
X
X
CCW
X
X
X
a Depends
CW
X
X
X
Rotation to Open
X
X
X
MS4120F1204
X
X
—
MS4620F1005
X
X
X
MS4620F1203
X
X
X
—
MS8120F1002
X
X
X
X
MS8120F1200
on type of installation.
External Auxiliary Switch Package.
b 32003532-005
3
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ACTUATOR SELECTION
ACTUATOR FEATURES
Use Table 6 to determine what features best fit your actuator
Data or Specification Data literature for the corresponding
actuator.
Table 6. Actuator Features.
X
X
X
X
X
X
Switches
Special
Features
Proportional
Two Position
100-200 Vac
24 Vac
X
Floating
Control
Signal
Voltage
300 lb-in. (34 N•m)
175 lb-in. (20 N•m)
88 lb-in. (10 N•m)
70 lb-in. (8 N•m)
44 lb-in. (5 N•m)
Torque Rating
35 lb-in. (4 N•m)
Spring Return
Non-Spring Return
Fail Safe
Mode
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
MS7505A2008 S05010
MS8110A1008 S1024-2POS
X
MS8110A1206 S1024-2POS-SW2
MS4110A1002 S10120-2POS
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Catalog Number
MS4105A1002 S05120-2POS
X
X
Model Number
MS8105A1008 S0524-2POS
MS4110A1200 S10120-2POS-SW2
MS7510A2008 S10010
X
MS7510A2206 S10010-SW2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
MS7520A2205 S20010-SW2
X
X
X
X
X
X
MS7520H2208 S20010-SER-SW2
X
X
X
X
X
X
X
X
X
X
X
X
X
MS7510H2209 S10010-SER-SW2
X
MS8120A1007 S2024-2POS
X
X
X
X
X
X
X
X
X
ML6161B2024 ML6161B2024
ML6174B2019 ML6174B2019
X
X
X
X
X
X
X
X
X
X
MN6120A1002 N2024
X
X
X
X
X
X
X
X
X
X
X
X
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X
ML7174A2001 ML7174A2201
X
X
X
ML7161A2008 ML7161A2008
X
X
MS4120A1209 S20120-2POS-SW2
MS7520A2007 S20010
X
X
MS8120A1205 S2024-2POS-SW2
MS4120A1001 S20120-2POS
X
MN6120A1200 N2024-SW2
MN7220A2007 N20010
X
MN7220A2205 N20010-SW2
MN6134A1003 N3424
X
4
MN7234A2008 N344010
APPLICATION
EXTERNAL VS. INTERNAL MOUNTING
Some installations physically prohibit direct coupling the
actuator to the damper shaft. Direct-coupled mounting is
preferable. Remote mounting of Honeywell Direct Coupled
Actuators (DCA) can be done using a damper linkage.
Installation can require the actuator mounting to be either
external or internal to the damper frame. In most cases, this
corresponds to external or internal to the ductwork.
This section discusses damper linkage installations, how to
install a damper linkage and explanations of special
applications, including:
• Modification of damper linkages to achieve faster response
times at the damper.
• Modification of damper linkages so that the angle of
rotation can be limited.
Damper Crankarms
External
External mounting requires fitting the damper shaft with a
crankarm and a ball joint. One crankarm is Honeywell’s part
number 26026G.
Installation examples that can prohibit direct-coupled
mounting:
• Dampers installed in a wall section.
• Dampers installed inside a roof-top unit with no room left
outside the damper frame.
• Replacing foot-mounted motor(s).
• Dampers without provision for external damper shaft.
Fig. 1. 26026G Crankarm.
A basic damper linkage includes a damper shaft crankarm, an
actuator crankarm, a pushrod, and ball joints. In addition, a
DCA can require a remote mounting kit such as Honeywell’s
part number 50001194-001. This kit allows the actuator to be
mounted to either the duct or the damper frame.
IMPORTANT
— The actuator crankarm must be able to complete its
full stroke unobstructed.
— The actuator travel limits must correspond to the
damper full open or full closed position.
— Short pushrods can be difficult to adjust.
— Lengthy pushrods often lack rigidity, resulting in poor
damper response.
5
Internal
Internal mounting requires fitting the damper blade with a
damper blade lever. It is typical to order the damper with a
If the damper is not already fitted with a blade lever, use
Honeywell part number 32007205-002 (for dampers less than
24 in. high) or 32007205-003 (for dampers greater than 24 in.
high). See Fig. 2.
63-2623
32007205-003 shown
32007205-002 shown
M20861
M20860
Actuator Crankarms
Depending upon the installation, the actuator crankarm might
be part of a remote mounting kit, such as the 50001194-001. It
can also be an independent part, such as the 205830A. In
either case, fit the actuator with a crankarm and balljoint.
Fig. 3. 27518 Balljoint.
Ball Joints
Pushrods
Each crankarm requires a balljoint to facilitate connection
between the damper and actuator. Honeywell part number
27518 is sized for 5/16 in. diameter pushrods and 103598 is
sized for 1/4 in. diameter pushrods.
Connecting the damper shaft crankarm and the actuator
crankarm requires a pushrod. The pushrod connects to the
balljoint of each crankarm. Pushrods, such as Honeywell part
number 25720, can be ordered in various lengths or cut to
length by the installer. 25720 is a 5/16 in. diameter rod.
Table 7. Suggested Parts List
Mounting Type
External
Internal
Damper Crankarm 26026G
32007205-002 or -003
Ball Joints
27518 (5/16 in. diameter)
27518 (5/16 in. diameter)
Pushrod
25720x (5/16 in. diameter)
25720x (5/16 in. diameter)
Actuator Crankarm 50001194-001 Foot/Frame Mounting Kit, or see
actuator accessories for appropriate crankarm
63-2623
6
50001194-001 Foot/Frame Mounting Kit, or see
actuator accessories for appropriate crankarm
TYPICAL INSTALLATIONS
damper remote operation through a 90 degree stroke using a
DCA with a 90 degree stroke (nominal).
DUCT
B
B
A
C
C
A
DAMPER
REMOTE
MOUNTED
ACTUATOR
M22568
Fig. 4. Externally mounted actuator and linkage to a damper.
DUCT
A
B
B
A
DAMPER
REMOTE
MOUNTED
ACTUATOR
M22569
Fig. 5. Internally mounted actuator and linkage to a damper.
7
63-2623
Standard Applications
(90° actuator travel and 90° damper travel)
NOTE: The crankarms will be parallel to each other.
In order to achieve the same 90° of travel, special care should
be taken in deciding the position of the two crankarms:
1. Position the damper blade at mid-position. See Fig. 6.
2. Position the actuator at mid-position (see Fig. 7):
a. Non-spring return: Declutch the DCA.
b. Spring return: Manually wind the DCA.
3. With the actuator mounted in place, create an imaginary
line which connects the center of the damper crankarm
and the center of the actuator crankarm. (See Fig. 8.)
4. Position each crankarm perpendicular to the imaginary
line. (See Fig. 9.)
5.
6.
Install a balljoint (finger-tight) on each crankarm.
Adjust the balljoints so that they are equidistant from the
corresponding crankarm centers. (See Fig. 10.)
Install pushrod and tighten retaining screws.
Ensure tight damper closure by exercising the assembly
through the entire travel:
a. If damper closure is not tight, adjust the actuator
crankarm balljoint to lengthen the effective length.
b. If damper closes early, adjust the actuator crankarm
balljoint to shorten the effective length.
Tighten all balljoints.
7.
8.
9.
IMAGINARY LINE
CONNECTING
CENTERS OF
CRANKARMS
M22572
Fig. 8. Line connecting crankarm centers.
M22570
Fig. 6. Damper blade at mid-position.
90°
IMAGINARY LINE
CONNECTING
CENTERS OF
CRANKARMS
90°
M22573
Fig. 9. Crankarm perpendicular positioning.
La = L d
Ld
La
M22571
IMAGINARY LINE
CONNECTING
CENTERS OF
CRANKARMS
Fig. 7. Actuator at mid-position.
M22574
63-2623
8
Non-Standard Applications
With crankarms parallel at mid-position the difference in
effective crankarm lengths is inversely proportional to:
— the difference in full rotation angles.
— the difference in timing.
Faster Response Time
Some applications require faster than normal actuator
response time. It is possible to configure a linkage to cause
faster damper travel than actuator stroke.
EXAMPLE: La is twice the length of Ld. (See Fig. 11.)
—
Travel of the damper is half that of the actuator.
—
Control is more precise.
Limited Damper Travel
Some applications require limiting damper travel (to less than
90 degrees). It is possible to configure a linkage to cause less
damper travel than actuator stroke.
L a < Ld
1
NOTE: With some actuators, travel limitation can be
achieved using mechanical travel limits.
2
PUSHROD
Ld
Non-Standard Application Setup
Setup is the same for both faster response time and limited
damper travel. To accomplish either, the effective crankarm
length must be adjusted. As with all crankarm applications the
two variables, crankarm angle and length are critical.
NOTE: Faster damper timing setup limits DCA travel.
1.
2.
Follow standard application steps 1 through 5.
Adjust the crankarm effective lengths to achieve faster
timing or limited travel.
NOTES:
—
—
Many variations are possible using this basic
guideline.
Experimentation is typically necessary to achieve
the required travel/timing.
La
IMAGINARY LINE
CONNECTING
CENTERS OF
CRANKARMS
1
ACTUATOR TRAVELS 90° IN 90 SECONDS.
2
DAMPER TRAVELS LESS THAN 90° IN 90 SECONDS, DEPENDING
UPON THE LENGTH OF THE DAMPER CRANKARM RELATIVE TO THE
LENGTH OF THE ACTUATOR CRANKARM.
M22576
Fig. 12. Faster timing. (Shown with both actuator and
damper at mid-position.)
EXAMPLE: La is half the length of Ld. (See Fig. 12.)
—
Damper timing is half that of the actuator.
La > Ld
1
PUSHROD
2
Ld
La
IMAGINARY LINE
CONNECTING
CENTERS OF
CRANKARMS
1
ACTUATOR TRAVELS 90° IN 90 SECONDS.
2
DAMPER TRAVELS LESS THAN 90° IN 90 SECONDS, DEPENDING
UPON THE LENGTH OF THE DAMPER CRANKARM RELATIVE TO THE
LENGTH OF THE ACTUATOR CRANKARM.
M22575
Fig. 11. Limited travel dynamics. (Shown with both
actuator and damper at mid-position.)
9
63-2623
NOTES
63-2623
10
11
63-2623
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
63-2623
B.B. 11-04
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
www.honeywell.com
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