af series spring return direct coupled actuator af series.pdfactuator may also be powered by 24 vdc....

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AF Series Spring Return Direct Coupled Actuator®

Applications

Minimum 133 in-lb torque For damper areas up to 35 sq-ft*

(For lower torque, see NF, LF, or TF series)

ZG106 or ZG 107bracket

Mount directly to 1.05” jackshafts.New standard clamp fits standard 1/2”shafts to 1.05” jackshafts.

Linkage solutions are available when direct coupling is notpossible. (See Mounting Methods Guide and MechanicalAccessories Documentation page 132)

Removefor 3/4” to 1.05”shafts

Torque: 133 in-lb

Power supply : 24 VAC/DC

120 VAC

230 VAC

Control signal: on-off

2 to 10 VDC

Multi-function**

0 to 135Ω

0 to 20 V phasecut

Feedback signal: 2 to 10 VDC

VDC variable**

Running time motor: 150 sec constant

Adj. 75 to 300 sec.***

spring: <20 sec

Brushless DC Motor

External direction of rotation switch

Manual override

Appliance rated cable, 18 GA

Built-in auxiliary switch 2 SPDT

Installation instructions ......(p. 22–27) General wiring ..............(p. 29) Start-up and checkout (p. 30)Electrical operations ..........(p. 28)*Based on 4 in-lb/ft2 damper torque loading. Parallel blade. No edge seals. **Default 2 to 10 VDC. ***Default 150 seconds.

AF Series – at a glance AF2

4 U

S (p

. 10)

AF2

4-S

US

(p. 1

0)A

F120

US

(p. 1

2)A

F120

-S U

S (p

. 12)

AF2

30 U

S (p

. 12)

AF2

30-S

US

(p. 1

2)A

F24-

SR

US

(p. 1

4)A

F24-

PC

US

(p. 1

6)A

F24-

MFT

US

(p. 1

8)AF

24-M

FT-S

US

(p. 1

8)AF

24-M

FT95

US

(p. 2

0)

© All AFActuators have BDCM

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AFA CLOSER LOOK…

AF Series Spring Return Direct Coupled Actuator®

LISTED94D5TEMP. IND &REG. EQUIP.

UL

Cut labor costs with simple direct coupling.

True mechanical spring return – the most reliable failsafe.

Reverse mount for clockwise or counterclockwise fail-safe.

Check damper position easily with clear position indicator.

Overload-proof throughout rotation

Temporary restrictions in damper movement will not changeactuator operation. Actuator returns to normal operation whenrestriction is removed. (modulating actuators)

Easy mechanical stop to adjust angle of rotation (add ZDB-AF2 accessory).

By eliminating internal condensation Golden Point breather membrane optimizes performance in harsh airstream environments.

Built-in auxiliary switch is easy to use, offers feedback or signal for additional device. (-S models)

Manual override crank speeds installation

Need to change control direction? Do it easily with a simple switch. (modulating actuators)

Microprocessor-controlled brushless DC motor increases actuator life span and reliability, provides constant running time. (modulating actuators)

Rugged metal housing withstands rough handling in themechanical room.

3 ft. appliance cable and conduit connectoreases installation.

Double insulated – no need for separate safety ground. A Belimo exclusive. (-S,120V, 230V models)

Automatically compensates for damper seal wear, ensuring tightclose-off.

The Belimo Difference

Customer Commitment.Extensive product range. Application assistance. Same-day shipments. Free technical support. Five year warranty.

Low Installation and Life-Cycle Cost.Easy installation. Accuracy and repeatability. Low power consumption. No maintenance.

Long Service Life.Components tested before assembly. Every product tested before shipment. 30+ years direct coupled actuator design.

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AF24 (-S) USOn-off, spring return failsafe, 24 V

®

Torque min. 133 in-lb, for control of air dampers

ApplicationFor on-off, fail-safe control of dampers in HVAC systems.Actuator sizing should be done in accordance with the dampermanufacturer’s specifications. Control is on-off from an auxil-iary contact, or a manual switch.

The actuator is mounted directly to a damper shaft up to 1.05”in diameter by means of its universal clamp. A crankarm andseveral mounting brackets are available for applications wherethe actuator cannot be direct coupled to the damper shaft.

OperationThe AF series actuators provide true spring return operation forreliable fail-safe application and positive close off on air tightdampers. The spring return system provides consistent torqueto the damper with, and without, power applied to the actuator.

The AF series provide 95° of rotation and are provided with agraduated position indicator showing 0° to 95°. The AF has aunique manual positioning mechanism which allows the set-ting of any damper position within its 95° of rotation. The AFseries actuators are shipped at +5° (5° from full fail-safe) toprovide automatic compression against damper gaskets fortight shut-off. When power is applied to the AF series, themanual mechanism is released. The actuators will now try toclose against the 0° position during its normal control opera-tions. The manual override can also be released physically bythe use of a crank supplied with the actuator.

The AF uses a brushless DC motor which is controlled by anApplication Specific Integrated Circuit (ASIC). The ASIC moni-tors and controls the actuator’s rotation and provides a digitalrotation sensing function to prevent damage to the actuator ina stall condition. The actuator may be stalled anywhere in itsnormal rotation without the need of mechanical end switches.

The AF24-S US version is provided with 2 built in auxiliaryswitches. These SPDT switches are provided for safety inter-facing or signaling, for example, for fan start-up. The switchingfunction at the fail-safe position is fixed at +5°, the other switchfunction is adjustable between +25° to +85°.

Dimensions [All numbers in brackets are in millimeters.]

1.97"

3.15

" [8

0]

3.86

" [9

8]3.

10"

[78]

2.24

" [5

7]

[50]

1.93

"[4

9]

2.64"[67]

0.26" [6.5]5.85" [148.5]

10.59" [269]

0.35" [9]

0.39" [10]

0.65" [16.5]

0.19" [5]

K4-2 US (supplied)

1/2" Centered (Default)

3/4" Centered (Field Selectable)

1.05" Centered (Field Selectable)

K4-1 US (optional)

3/4" to 1.05" Adjustable

K4 US (optional)

3/8" to 3/4" Adjustable


UL

Technical Data AF24 (-S) US

Power supply 24 VAC ± 20% 50/60 Hz24 VDC ± 10%

Power consumption running: 5 W; holding: 1.5 W

Transformer sizing 10 VA (class 2 power source)

Electrical connection 3 ft, 18 GA appliance cable1/2” conduit connector

Electrical protection auxiliary switches are double insulated

Overload protection electronic throughout 0° to 95° rotation

Angle of rotation 95°, adjustable 35 to 95° w/ ZDB-AF2

Torque 133 in-lb [15 Nm] constant

Direction of rotation reversible with CW/CCW mounting

Position indication visual indicator, 0° to 95° (0° is springreturn position)

Manual override 3mm hex crank (shipped w/actuator)

Auxiliary switches 2 x SPDT 7A (2.5A) @ 250 VAC, UL listedone set at +5°, one adjustable 25° to 85°

Running time 150 sec. constant, independent ofload, spring return < 20 sec

Humidity 5 to 95% RH non-condensing

Ambient temperature -22°F to +122°F [-30°C to +50°C]

Storage temperature -40°F to +176°F [-40°C to +80°C]

Housing NEMA type 2 / IP54

Housing material zinc coated steel

Agency listings UL 873 listed, CSA C22.2 No. 24 certified

Noise level max. 45 dB (A)

Servicing maintenance free

Quality standard ISO 9001

Weight 6.0 lbs (2.7 kg.)

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On-off, spring return failsafe, 24 V

®

AccessoriesAV 10-18 Shaft extensionIND-AF2 Damper position indicatorK4 US Universal clamp for 3/8” to 3/4” shaftsK4-1 US Universal clamp for up to 1.05” dia jackshaftsK4-H Universal clamp for hexshafts 3/8” to 5/8”KH-AF Crankarm for up to 3/4” round shaft (Series 2)KH-AF-1 Crankarm for up to 1.05” jackshaft (Series 2)KH-AFV V-bolt kit for KH-AF and KH-AF-1Tool-06 8mm and 10 mm wrenchZG-HTR Thermostat/Heater KitZDB-AF2 Angle of rotation limiterZG-100 Universal mounting bracketZG-101 Universal mounting bracketZG-102 Multiple actuator mounting bracketZG-103 Universal mounting bracketZG-104 Universal mounting bracketZG-106 Mounting bracket for Honeywell® Mod IV

replacement or new crankarm type installationsZG-107 Mounting bracket for Honeywell® Mod III or Johnson®

Series 100 replacement or new crankarm typeinstallations

ZG-108 Mounting bracket for Barber Colman® MA 3../4..,Honeywell® Mod III or IV or Johnson® Series 100replacement or new crankarm type installations

ZG-AF US Crankarm adaptor kit for AF/NF ZG-AF108 Crankarm adaptor kit for AF/NF ZS-100 Weather shield (metal)ZS-150 Weather shield (polycarbonate)ZS-260 Explosion-proof housingZS-300 NEMA 4X housing

Note: When using AF24 US and AF24-S US actuators,only use accessories listed on this page.

Wiring diagrams

AF24 (-S) US Typical SpecificationOn-off spring return damper actuators shall be direct coupledtype which require no crankarm and linkage and be capable ofdirect mounting to a jackshaft up to a 1.05” diameter. The actu-ators must be designed so that they may be used for eitherclockwise or counterclockwise fail-safe operation. Actuatorsshall have a manual positioning mechanism accessible on itscover. Actuators shall use a brushless DC motor and be pro-tected from overload at all angles of rotation. Run time shall beconstant and independent of torque. If required, 2 SPDT auxil-iary switches shall be provided with one switch having thecapability of being adjustable. Actuators with switches must beconstructed to meet the requirement for Double Insulation soan electrical ground connection is not required to meet agencylistings. Actuators shall be UL listed and CSA certified, have a5 year warranty, and be manufactured under ISO 9001International Quality Control Standards. Actuators shall be asmanufactured by Belimo.

2

3

1 Provide overload protection and disconnect as required.

Actuators may be connected in parallel. Power con-sumption must be observed.

Actuator may also be powered by 24 VDC.

2

3

1

4

6

Provide overload protection and disconnect as required.



For end position indication, interlock control, fan start-up, etc., AF24-S US incorporates two built-in auxiliaryswitches: 2 x SPDT, 7A (2.5A) @250 VAC, UL listed,one switch is fixed at +5°, one is adjustable 25° to85°.

Meets UL and CSA requirements without the need of anelectrical ground connection.

On-off wiring for AF24 US On-off wiring for AF24-S US

1 Common

2 + Hot

1

2

24 VAC Transformer

AF24 US

Line Volts 3

1 Common

2 + Hot

1

2

24 VAC Transformer

AF24-S US

Line Volts 3

4

6

S1

S2

S3

S4

S5

S6

NC

NO

NC

NO

5°

25° to 85°

W00

1

W00

2

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ApplicationFor on-off, fail-safe control of dampers in HVAC systems.Actuator sizing should be done in accordance with the dampermanufacturer’s specifications. Control is on-off from an auxil-iary contact, or a manual switch.


OperationThe AF series actuators provide true spring return operation forreliable fail-safe application and positive close off on air tightdampers. The spring return system provides consistent torqueto the damper with, and without, power applied to the actuator.

The AF series provide 95° of rotation and are provided with agraduated position indicator showing 0° to 95°. The AF has aunique manual positioning mechanism which allows the set-ting of any damper position within its 95° of rotation. The AFseries actuators are shipped at +5° (5° from full fail-safe) toprovide automatic compression against damper gaskets fortight shut-off. When power is applied to the AF series, themanual mechanism is released. The actuators will now try toclose against the 0° position during its normal control opera-tions. The manual override can also be released physically bythe use of a crank supplied with the actuator.

The AF uses a brushless DC motor which is controlled by anApplication Specific Integrated Circuit (ASIC). The ASIC monitorsand controls the actuator’s rotation and provides a digital rotationsensing function to prevent damage to the actuator in a stall con-dition. The actuator may be stalled anywhere in its normal rota-tion without the need of mechanical end switches. The actuatorsare Double Insulated so a ground connection is not required.

The AF120/230-S US version is provided with 2 built-in auxil-iary switches. These SPDT switches are provided for safetyinterfacing or signaling, for example, for fan start-up. Theswitching function at the fail-safe position is fixed at +5°, theother switch function is adjustable between +25° to +85°.


AF120 (-S) US, AF230 (-S) US On-off, spring return failsafe, 120 or 230 VAC

1.97"

3.15

" [8

0]

3.86

" [9

8]3.

10"

[78]

2.24

" [5

7]

[50]

1.93

"[4

9]

2.64"[67]

0.26" [6.5]5.85" [148.5]

10.59" [269]

0.35" [9]

0.39" [10]

0.65" [16.5]

0.19" [5]

K4-2 US (supplied)




K4-1 US (optional)


K4 US (optional)



UL

®

Technical Data AF120 (-S) US AF230 (-S) US

Power supply 120 VAC ± 10% 230 VAC ±14%50/60 Hz 50/60 Hz

Power consumption running: 6 W 6.5 Wholding: 2.3 W 2.5 W

Transformer sizing 10 VA 11 VA


Electrical protection actuators are double insulated

Overload protection electronic throughout 0° to 95° rotation

Angle of rotation 95°, adjustable 35 to 95° w/ ZDB-AF2


Direction of rotation reversible with CW/CCW mounting

Position indication visual indicator, 0° to 95° (0° isspring return position)


Auxiliary switches 2 x SPDT 7A (2.5A) @ 250 VAC, UL listed

(AF120/230-S) one set at +5°, one adjustable 25° to 85°

Running time 150 sec. constant, independent ofload, spring return < 20 sec





Housing material zinc coated steel






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c.AF120 (-S) US, AF230 (-S) US

On-off, spring return failsafe, 120 or 230 VAC

AccessoriesAV 10-18 Shaft extensionIND-AF2 Damper position indicatorK4 US Universal clamp for 3/8” to 3/4” shaftsK4-1 US Universal clamp for up to 1.05” dia jackshaftsKH-AF Crankarm for up to 3/4” round shaft (Series 2)KH-AF-1 Crankarm for up to 1.05” jackshaft (Series 2)KH-AFV V-bolt kit for KH-AF and KH-AF-1Tool-06 8mm and 10 mm wrenchZG-HTR Thermostat/Heater KitZDB-AF2 Angle of rotation limiterZG-100 Universal mounting bracketZG-101 Universal mounting bracketZG-102 Multiple actuator mounting bracketZG-103 Universal mounting bracketZG-104 Universal mounting bracketZG-106 Mounting bracket for Honeywell® Mod IV replace-

ment or new crankarm type installationsZG-107 Mounting bracket for Honeywell® Mod III or Johnson®

Series 100 replacement or new crankarm typeinstallations



Note: When using AF120/230 US and AF120/230-S USactuators, only use accessories listed on this page.

AF120 US, AF230 US Typical SpecificationOn-off spring return damper actuators shall be direct coupledtype which require no crankarm and linkage and be capableof direct mounting to a jackshaft up to a 1.05” diameter. Theactuators must be designed so that they may be used foreither clockwise or counterclockwise fail-safe operation.Actuators shall have a manual positioning mechanism acces-sible on its cover. Actuators shall use a brushless DC motorand be protected from overload at all angles of rotation. Runtime shall be constant and independent of torque. If required,2 SPDT auxiliary switches shall be provided with one switchhaving the capability of being adjustable. Actuators must beconstructed to meet the requirement for Double Insulation soan electrical ground connection is not required to meetagency listings. Actuators shall be UL listed and CSA certi-fied, have a 5 year warranty, and be manufactured under ISO9001 International Quality Control Standards. Actuators shallbe as manufactured by Belimo.

Wiring diagrams

2



No ground connection is required.


2

3

1

3



No ground connection is required.

For end position indication, interlock control, fan startup,etc., AF120/230-S US incorporates two built-in auxiliaryswitches: 2 x SPDT, 7A (2.5A) @250 VAC, UL listed,one switch is fixed at +5°, one is adjustable 25° to 85°.


®

4

46

On-off wiring for AF120 US and AF230 US On-off wiring for AF120-S US and AF230-S US

1 Neutral

2 Hot1

2

120 VAC 230 VAC

AF120 US AF230 US

3

4

L1 N

L2 H

120 VAC 230 VAC

1 Neutral

2 Hot1

2AF120 US AF230 US

3

4

6

S1

S2

S3

S4

S5

S6

NC

NO

NC

NO

5°

25° to 85°

L1 N

L2 H

W00

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W00

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ApplicationFor proportional modulation of dampers in HVAC systems.Actuator sizing should be done in accordance with the dampermanufacturer’s specifications.


The actuator operates in response to a 2 to 10 VDC, with theaddition of a 500Ω resistor, a 4 to 20 mA control input from anelectronic controller or positioner. A 2 to 10 VDC feedbacksignal is provided for position indication or master-slave appli-cations.

OperationThe AF series actuators provide true spring return operation forreliable fail-safe application and positive close-off on air tightdampers. The spring return system provides constant torque tothe damper with, and without, power applied to the actuator.

The AF series provides 95° of rotation and is provided with agraduated position indicator showing 0 to 95°. The AF has aunique manual positioning mechanism which allows the set-ting of any damper position within its 95° of rotation. Theactuator is shipped at +5° position (5° from full fail-safe) toprovide automatic compression against damper gaskets fortight shut-off. When power is applied, the manual mechanismis released and the actuator drives toward the full fail-safeposition. The actuator will memorize the angle where it stopsrotating and use this point for its zero position for its normalcontrol operations. The manual override can also be releasedphysically by the use of a crank supplied with the actuator.

The AF uses a brushless DC motor which is controlled by anApplication Specific Integrated Circuit (ASIC) and a micro-processor. The microprocessor provides the intelligence to theASIC to provide a constant rotation rate and to know the actu-ator’s exact zero position. The ASIC monitors and controlsthe brushless DC motor’s rotation and provides a digital rota-tion sensing function to prevent damage to the actuator in astall condition. The actuator may be stalled anywhere in itsnormal rotation without the need of mechanical end switches.


1.97"

3.15

" [8

0]

3.86

" [9

8]3.

10"

[78]

2.24

" [5

7]

[50]

1.93

"[4

9]

2.64"[67]

0.26" [6.5]5.85" [148.5]

10.59" [269]

0.35" [9]

0.39" [10]

0.65" [16.5]

0.19" [5]

K4-2 US (supplied)




K4-1 US (optional)


K4 US (optional)


AF24-SR US Proportional damper actuator, spring return failsafe, 24 V for 2 to 10 VDC and 4 to 20 mA control signal. Output signal of 2 to 10 VDC for position indication

Technical Data AF24-SR US


Power consumption running: 6 W ; holding: 2 W



Overload protection electronic throughout 0 to 95° rotation

Operating range Y 2 to 10 VDC, 4 to 20 mA

Input impedance 100 kΩ (0.1 mA), 500Ω

Feedback output U 2 to 10 VDC (max. 0.5 mA) for 95°

Angle of rotation mechanically limited to 95°


Direction of rotation spring: reversible with cw/ccw mountingmotor: reversible with built-in switch



Running time 150 sec. constant, independent of load,spring return < 20 sec





Housing material zinc coated metal







UL

®

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c.AF24-SR US

Proportional damper actuator, spring return failsafe, 24 V for 2 to 10 VDC and 4 to 20 mA control signal. Output signal of 2 to 10 VDC for position indication

AccessoriesAV 10-18 Shaft extensionIND-AF2 Damper position indicatorK4 US Universal clamp for 3/8” to 3/4” shaftsK4-1 US Universal clamp for up to 1.05” dia jackshaftsK4-H Universal clamp for hexshafts 3/8” to 5/8”KH-AF Crankarm for up to 3/4” round shaft (Series 2)KH-AF-1 Crankarm for up to 1.05” jackshaft (Series 2)KH-AFV V-bolt kit for KH-AF and KH-AF-1Tool-06 8mm and 10 mm wrenchSGA24 Min. and/or man. positioner in NEMA 4 housingSGF24 Min. and/or man. positioner for flush panel mountingZG-R01 500Ω resistor for 4 to 20 mA control signalZG-HTR Thermostat/Heater KitZDB-AF2 Angle of rotation limiterZG-100 Universal mounting bracketZG-101 Universal mounting bracketZG-102 Multiple actuator mounting bracketZG-103 Universal mounting bracketZG-104 Universal mounting bracketZG-106 Mounting bracket for Honeywell® Mod IV replace-


Series 100 replacement or new crankarm type installations



Note: When using AF24-SR US actuators, only useaccessories listed on this page.

Wiring diagrams

2


Actuators may be connected in parallel. Power con-sumption and input impedance must be observed.

Actuator may also be powered by 24 VDC.3

2




The ZG-R01 500Ω resistor converts the 4 to 20 mAcontrol signal to 2 to 10 VDC. Only connect common to neg. (—) leg of control circuits

4

5

3

®

AF24-SR US Typical Specification Spring return control damper actuators shall be direct coupled typewhich require no crankarm and linkage and be capable of directmounting to a jackshaft up to a 1.05” diameter. The actuator mustprovide proportional damper control in response to a 2 to 10 VDC or,with the addition of a 500Ω resistor, a 4 to 20 mA control input froman electronic controller or positioner. The actuators must bedesigned so that they may be used for either clockwise or counter-clockwise fail-safe operation. Actuators shall have control direction ofrotation switch accessible on its cover. Actuators shall use a brushlessDC motor controlled by a microprocessor and be protected from over-load at all angles of rotation. Run time shall be constant, and inde-pendent of torque. A 2 to 10 VDC feedback signal shall be providedfor position feedback or master-slave applications. Actuators shall beUL listed and CSA certified, have a 5 year warranty, and be manufac-tured under ISO 9001 International Quality Control Standards.Actuators shall be as manufactured by Belimo.

Control Signal (+)2 to 10 VDC

(–)

1 Common

2 + Hot

3 Y Input, 0 to 10V

5 U Output 2 to 10V

1

2

3

24 VAC Transformer

AF24-SR US

Line Volts

W01

1

W19

7

1 Common

2 + Hot

3 Y Input, 0 to 10V

5 U Output 2 to 10V

1 24 VAC Transformer

5

3

2

4Control Signal (+)

4 to 20 mA (–)

Feedback Signal (+)2 to 10 VDC (–)

Ω 500Ω

Line Volts

AF24-SR US

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imo

Airc

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ApplicationFor proportional modulation of dampers in HVAC systems.Actuator sizing should be done in accordance with the dampermanufacturer’s specifications.


The actuator operates in response to a 0-10 V phasecut con-trol input from an electronic controller or positioner. A 2 to 10VDC feedback signal is provided for position indication ormaster-slave applications.

OperationThe AF series actuators provide true spring return operation forreliable fail-safe application and positive close-off on air tightdampers. The spring return system provides constant torque tothe damper with, and without, power applied to the actuator.

The AF series provides 95° of rotation and is provided with agraduated position indicator showing 0° to 95°. The AF has aunique manual positioning mechanism which allows the set-ting of any damper position within its 95° of rotation. Whenpower is applied to the AFR series its “one time use” mecha-nism is released. The actuator is shipped at +5° (5° from fullfail-safe) to provide automatic compression against dampergaskets for tight shut-off. When power is applied, the manualmechanism is released and the actuator drives toward the fullfail-safe position. The actuator will memorize the angle whereit stops rotating and use this point for its zero position for itsnormal control operations. The manual override can also bereleased physically by the use of a crank supplied with theactuator.

The AF uses a brushless DC motor which is controlled by anApplication Specific Integrated Circuit (ASIC) and a micro-processor. The microprocessor provides the intelligence to theASIC to provide a constant rotation rate and to know the actu-ator’s exact zero position. The ASIC monitors and controlsthe brushless DC motor’s rotation and provides a digital rota-tion sensing function to prevent damage to the actuator in astall condition. The actuator may be stalled anywhere in itsnormal rotation without the need of mechanical end switches.


1.97"

3.15

" [8

0]

3.86

" [9

8]3.

10"

[78]

2.24

" [5

7]

[50]

1.93

"[4

9]

2.64"[67]

0.26" [6.5]5.85" [148.5]

10.59" [269]

0.35" [9]

0.39" [10]

0.65" [16.5]

0.19" [5]

K4-2 US (supplied)




K4-1 US (optional)


K4 US (optional)


AF24-PC US Proportional damper actuator, spring return failsafe, 24 V for 0 to 20 V phasecut control signal. Output signal of 2 to 10 VDC for position indication


UL

®

D00

1

©

Technical Data AF24-PC US


Power consumption running: 6 W ; holding: 2.5 W




Operating range Y 0 to 10 V phasecut

Input impedance 8 kΩ (0.1 mA), 50mW

Feedback output U 2 to 10 VDC (max. 0.5 mA) for 95°

Angle of rotation mechanically limited to 95°


Direction of rotation spring: reversible with cw/ccw mountingmotor: reversible with built-in switch



Running time 150 sec. constant, independent of load,spring return < 20 sec











16

AF

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rcon

trols

(USA

), In

c.AF24-PC US

Proportional damper actuator, spring return failsafe, 24 V for 0 to 20 V phasecut control signal. Output signal of 2 to 10 VDC for position indication

AccessoriesAV 10-18 Shaft extensionIND-AF2 Damper position indicatorK4 US Universal clamp for 3/8” to 3/4” shaftsK4-1 US Universal clamp for up to 1.05” dia jackshaftsK4-H Universal clamp for hexshafts 3/8” to 5/8”KH-AF Crankarm for up to 3/4” round shaft (Series 2)KH-AF-1 Crankarm for up to 1.05” jackshaft (Series 2)KH-AFV V-bolt kit for KH-AF and KH-AF-1Tool-06 8mm and 10 mm wrenchSGA24 Min. and/or man. positioner in NEMA 4 housingSGF24 Min. and/or man. positioner for flush panel mountingZG-R01 500Ω resistor for 4 to 20 mA control signalZG-HTR Thermostat/Heater KitZDB-AF2 Angle of rotation limiterZG-100 Universal mounting bracketZG-101 Universal mounting bracketZG-102 Multiple actuator mounting bracketZG-103 Universal mounting bracketZG-104 Universal mounting bracketZG-106 Mounting bracket for Honeywell® Mod IV replace-


Series 100 replacement or new crankarm type installations



Note: When using AF24-PC US actuators, only useaccessories listed on this page.

Wiring diagrams

2



Actuator may also be powered by 24 VDC.3

®

AF24-PC US Typical Specification Spring return control damper actuators shall be direct coupled typewhich require no crankarm and linkage and be capable of directmounting to a jackshaft up to a 1.05” diameter. The actuator mustprovide proportional damper control in response to a 0 to 20 Vphasecut control output from an electronic controller or positioner.The actuators must be designed so that they may be used for eitherclockwise or counterclockwise fail-safe operation. Actuators shallhave control direction of rotation switch accessible on its cover.Actuators shall use a brushless DC motor controlled by a micro-processor and be protected from overload at all angles of rotation.Run time shall be constant, and independent of torque. A 2 to 10VDC feedback signal shall be provided for position feedback ormaster-slave applications. Actuators shall be UL listed and CSAcertified, have a 5 year warranty, and be manufactured under ISO9001 International Quality Control Standards. Actuators shall be asmanufactured by Belimo.

Control Signal (+)0 to 20V Phasecut

(–)

1 Common

2 + Hot

3 Y Input, 0 to 10V Phasecut

5 U Output 2 to 10V

1

2

3

24 VAC Transformer

AF24-PC US

Line Volts

W18

4

0 to 20 V phasecut control of AF24-PC US


UL

AF24-MFT US

1.97"

3.15

" [8

0]

3.86

" [9

8]3.

10"

[78]

2.24

" [5

7]

[50]

1.93

"[4

9]

2.64"[67]

0.26" [6.5]5.85" [148.5]

10.59" [269]

0.35" [9]

0.39" [10]

0.65" [16.5]

0.19" [5]

K4-2 US (supplied)




K4-1 US (optional)


K4 US (optional)


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®AF24-MFT (-S) USProportional damper actuator, spring return failsafe, Multi-Function Technology®

Technical Data AF24-MFT (-S) USPower supply 24 VAC, ± 20%, 50/60 Hz

24 VDC, ±10%Power consumption 2.5 W holding

6 W runningTransformer sizing 10 VA (Class 2 power source)

Electrical 3 ft, 18 GA, appliance cable, connection 1/2” conduit connectorOverload protection electronic throughout 0 to 95° rotationOperating range Y* 2 to 10 VDC

4 to 20 mA (w/500 Ω, 1/4 W resistor) ZG-R01Input impedance 100kΩ for 2 to 10 VDC (0.1 mA)

500Ω for 4 to 20 mA 1500Ω for PWM, Floating point and On-Off control

Feedback output U* 2 to 10 VDC, 0.5 mA maxTorque min 133 in-lb (15 Nm)Direction of rotation* spring: reversible with cw/ccw mounting

motor: reversible with built-in switchMech. angle of rotation* 95°, adjustable 35° to 95° w/ZDB-AF2Running time motor* 150 seconds constantRunning time spring <20 sec spring return fail safe positionAngle of Rotation Off (Default)Adaptation*Override control* Min. (Min Position) = 0%

- ZS (Mid. Position) = 50%- Max. (Max. Position) = 100%

Position indication visual indicator, 0° to 95° (0° is spring return position)

Auxiliary switches 2 x SPDT 7A (2.5A) @ 250 VAC, UL listed(AF24-MFT-S US) one set at +5°, one adjustable 25° to 85°Manual override 3 mm hex crank (supplied)

Humidity 5 to 95% RH, non-condensing

Ambient temperature -22 to +122° F (-30 to +50° C)

Storage temperature -40 to +176° F (-40 to +80° C)

Housing NEMA 2, IP54Housing material zinc coated metalNoise level less than 45 dB (A)

Agency listings UL 873 listed, CE, CSA C22.2 No. 24 certifiedQuality standard ISO 9001Servicing maintenance freeWeight 6.0 lbs. (2.7 kg.)* Variable when configured with MFT options


• Torque min. 133 in-lb• Control 2 to 10 VDC (DEFAULT)• Feedback 2 to 10 VDC (DEFAULT)

ApplicationFor proportional modulation of dampers and control valves inHVAC systems. The AF24-MFT US provides mechanical springreturn operation for reliable fail-safe application.

Default/ConfigurationDefault parameters for 2 to 10 VDC applications of the AF24-MFT US actuator are assigned during manufacturing. If required, custom versions of the actuator can be ordered. The parameters noted in the Technical Data table are variable.

These parameters can be changed by three means:• Pre-set configurations from Belimo • Custom configurations from Belimo • Configurations set by the customer using the MFT-Handy®

or the MFT-Actuate™ PC software application.

OperationThe AF24-MFT US actuator provides 95° of rotation and is provid-ed with a graduated position indicator showing 0° to 95°. Theactuator will synchronize the 0° mechanical stop or the physicaldamper or valve mechanical stop and use this point for its zeroposition during normal control operations. A unique manual over-ride allows the setting of any actuator position within its 95° ofrotation with no power applied.This mechanism can be releasedphysically by the use of a crank supplied with the actuator. Whenpower is applied the manual override is released and the actuatordrives toward the fail-safe position.

The actuator uses a brushless DC motor which is controlled by anApplication Specific Integrated Circuit (ASIC) and a microproces-sor. The microprocessor provides the intelligence to the ASIC toprovide a constant rotation rate and to know the actuator’s exactposition. The ASIC monitors and controls the brushless DCmotor’s rotation and provides a Digital Rotation Sensing (DRS)function to prevent damage to the actuator in a stall condition.The position feedback signal is generated without the need formechanical feedback potentiometers using DRS. The actuatormay be stalled anywhere in its normal rotation without the need ofmechanical end switches.

The AF24-MFT US is mounted directly to control shafts up to1.05" diameter by means of its universal clamp and anti-rotationbracket. A crankarm and several mounting brackets are availablefor damper applications where the actuator cannot be direct cou-pled to the damper shaft. The spring return system provides mini-mum specified torque to the application during a power interrup-tion. The AF24-MFT US actuator is shipped at +5° (5° from fullfail-safe) to provide automatic compression against damper gas-kets for tight shut-off.

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500Ω

Ω

2 to 10 VDC Control Signal (–)

(+)

Blk (1) Common

Red (2) + Hot

Wht (3) Y1 Input, 2 to 10V

A Open = 0 V PositionA Closed = Normal Operation

Line Volts

24 VAC Transformer

2

1

3

Override to zero position

A

Blk (1) Common

Red (2) + Hot


Wht (5) U Output, 2 to 10V

2 to 10 VDC

2 to 10 VDC Feedback Signal

Control Signal (–)

Line Volts

24 VAC Transformer

2

1

33

Standard Wiring

CCW(L) CW(R)

(+)

Blk (1) Common

Red (2) + Hot


B Closed = 10 V PositionC Closed = Normal Operation


Line Volts

24 VAC Transformer

2

1

3

Override to 10 V position

B

C

2 to 10 VDC (+)

Blk (1) Common

Red (2) + Hot



Line Volts

24 VAC Transformer1

4

3

Override control to min, mid, max, positions

C

BA

2-10 VDC or 4 to 20 mA

Functions

0%

50%

100%

Control mode acc. to Y

Min*

Mid*

Max*

Normal**

* Default selectable 0-100%. See Configuration Data Sheet.** Customizable. See Configuration Data Sheet.

a b c

(+)

1/4 watt

2 to 10 VDC Control Signal

4

Blk (1) Common

Red (2) + Hot


Wht (5) U Output, 2 to 10V

4 to 20 mAControl Signal

Line Volts

24 VAC Transformer

2

1

33

Standard Wiring

(+) (–)

Ω500Ω 1/4 watt

4 to 20 mA (–)Control Signal(+)

Blk (1) Common

Red (2) + Hot


A Open = 4 mA PositionA Closed = Normal Operation

Line Volts

24 VAC Transformer

2

4

1

3

Override to zero position

A

Ω 500Ω 1/4 watt

4 to 20 mA (–)Control Signal

(+)

Blk (1) Common

Red (2) + Hot


B Closed = 20 mA PositionC Closed = Normal Operation

Line Volts

24 VAC Transformer

2

4

1

3

Override to 20 mA position

BΩ

500Ω 1/4 watt

C

With a 4-20 mA Input, up to 4 actuators may be wired in parallel. A 2% shift in the signal is seen when using a 500Ω resistor. Power consumption must be observed.

CCW(L) CW(R)

4 to 20 mA Control Signal

Notes

2

3


Actuators may be connected in parallel if not mechanically mountedto the same shaft. Power consumption and input impedance mustbe observed.


ZG-R01 may be used.

For end position indication, interlock control, fan startup, etc., AF24-MFT-S US incorporates two built-in auxiliary switches: 2 x SPDT, 7A (2.5A) @250 VAC, UL listed, one switch is fixed at+5°, one is adjustable 25° to 85°.

Meets UL and CSA requirements without the need of an electricalground connection.

5

6

S1

5°

25° to 85°

NC

NO

NC

NO

S2

S3

S4

S5

S6

5

6

Auxiliary Switch AF24-MFT-S US

AF24-MFT (-S) USProportional damper actuator, spring return failsafe, Multi-Function Technology®

4

1

W01

2

W01

4W

013

1.97"

3.15

" [8

0]

3.86

" [9

8]3.

10"

[78]

2.24

" [5

7]

[50]

1.93

"[4

9]

2.64"[67]

0.26" [6.5]5.85" [148.5]

10.59" [269]

0.35" [9]

0.39" [10]

0.65" [16.5]

0.19" [5]

K4-2 US (supplied)




K4-1 US (optional)


K4 US (optional)


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AF24-MFT95 USProportional damper actuator, spring return failsafe, 24 V for use with Honeywell® electronic Series 90, or a 0 to 135Ω input

Technical Data AF24-MFT95 US


Power consumption running: 6 W ; holding: 2 W




Operating range WRB 0 to 135Ω Honeywell electronic series90, or a 0 to 135 Ω input

Feedback output U* 2 to 10 VDC, 0.5 mA maxMech. angle of rotation* 95°, adjustable 35° to 95° w/ZDB-AF2Torque 133 in-lb [15 Nm] constant

Direction of rotation* spring: reversible with cw/ccw mountingmotor: reversible with built-in switch



Running time motor* 150 seconds constantRunning time spring <20 sec spring return fail safe positionAngle of Rotation Off (Default)Adaptation*Override control* Min. (Min Position) = 0%

- ZS (Mid. Position) = 50%- Max. (Max. Position) = 100%






Agency listings UL 873 listed, CE, CSA C22.2 No. 24 certified





* Variable when configured with MFT options

AF24-MFT95 US


• Torque min. 133 in-lb• Control fixed, 0 to 135Ω input, or Honeywell series 90 (fixed)• Feedback 2 to 10 VDC (DEFAULT)

ApplicationFor proportional modulation of dampers and control valves inHVAC systems. The AF24-MFT95 US provides mechanicalspring return operation for reliable fail-safe application.

Default/ConfigurationDefault parameters for 0 to 135Ω Input applications of the AF24-MFT95 US actuator are assigned during manufacturing. If required, custom versions of the actuator can be ordered. However the control input cannot be modified via MFT-Handy toolor PC-software. The parameters noted in the Technical Datatable are variable.

These parameters can be changed by three means:• Pre-set configurations from Belimo • Custom configurations from Belimo • Configurations set by the customer using the MFT-Handy®

or the MFT-Actuate™ PC software application.

OperationThe AF24-MFT95 US actuator provides 95° of rotation and is pro-vided with a graduated position indicator showing 0° to 95°. Theactuator will synchronize the 0° mechanical stop or the physicaldamper or valve mechanical stop and use this point for its zeroposition during normal control operations. A unique manual over-ride allows the setting of any actuator position within its 95° ofrotation with no power applied.This mechanism can be releasedphysically by the use of a crank supplied with the actuator. Whenpower is applied the manual override is released and the actuatordrives toward the fail-safe position.

The actuator uses a brushless DC motor which is controlled by anApplication Specific Integrated Circuit (ASIC) and a microproces-sor. The microprocessor provides the intelligence to the ASIC toprovide a constant rotation rate and to know the actuator’s exactposition. The ASIC monitors and controls the brushless DCmotor’s rotation and provides a Digital Rotation Sensing (DRS)function to prevent damage to the actuator in a stall condition.The position feedback signal is generated without the need formechanical feedback potentiometers using DRS. The actuatormay be stalled anywhere in its normal rotation without the need ofmechanical end switches.

The AF24-MFT95 US is mounted directly to control shafts up to1.05" diameter by means of its universal clamp and anti-rotationbracket. A crankarm and several mounting brackets are availablefor damper applications where the actuator cannot be direct cou-pled to the damper shaft. The spring return system provides mini-mum specified torque to the application during a power interrup-tion. The AF24-MFT95 US actuator is shipped at +5° (5° from fullfail-safe) to provide automatic compression against damper gas-kets for tight shut-off.

(Not selectable via MFT)

®


UL

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c.AF24-MFT95 US

Proportional damper actuator, spring return failsafe, 24 V for use with Honeywell® electronic Series 90, or a 0 to 135Ω input

1

2

3

5

2

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht

6 ‘U5’ Output 2-10 VDC

AF24-MFT95 US

Line Volts

24 VAC Transformer

1

3

3

5

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

W

WR R

Y

B

To other actuatorsResistor Kit No. ZG-R06

Q209A Minimum Position

Potentiometer

H205 Changeover

Controller

W973, W7100 Controller

Occupied Contact

Honeywell T675A Morning Warmup

Shunting Resistor

Line Volts

2

1

3

5

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 USTo other actuators

Line Volts

No. of actuators Resistance 2 1300Ω 3 910Ω 4 768Ω

B R W

W R B

1

3 25

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

Line Volts

24 VAC Transformer

Honeywell Q209A Minimum Position

Potentiometer

Shunting Resistor

R

R

B W

W

W

R

B

Used with the W973 and W7100 controllers.

Honeywell T675A Morning

WarmupW973, W7100

T775

Override of AF24-MFT95 US

1

3

5

4

2

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

Line Volts

24 VAC Transformer

1

1

2

3

3

5

5

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

W

R

B

To other actuators

Resistor Kit No. ZG-R03

Series 90 Controller

Shunting Resistor

Line Volts


Actuators and controller must have separate transformers.

Consult controller instruction data for more detailed installation information.

Resistor value depends on the type of controller and the number of actuators. No resistor is used for one actuator. Honeywell resistor kits may also be used.

To reverse control rotation, use the reversing switch.

No. of actuators Resistance 2 140Ω 3 71.5Ω 4 47.5Ω 5 37.5Ω 6 28Ω

Switch A Switch B Damper Position

Damper Open

Damper Closed

The direction of rotation switch is set so that the fail safe position and the position of the damper is closed with no signal at wire R.

1

3

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

A

B

Line Volts

24 VAC Transformer

135Ω

1

1

2

2

3

3

4

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

AW

R

B

Controller

B

Line Volts

Line Volts

24 VAC Transformer





1

3

2

2

5

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

Line Volts

24 VAC Transformer

1

1

2

3

3

5

5

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 USTo other actuators


S963A Minimum Position

Potentiometer

H205 Change- over Controller

Occupied Contact

Shunting Resistor

Line Volts






R B WB

R

W

WRB

Wiring multiple actuators to a Series 90controller using a minimum positionpotentiometer.

1

2

3

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

Line Volts

24 VAC Transformer

W B RW

B

R

R

Series 90 low limit control 135Ω for 0 to 50% control 280Ω for 0 to 100% control


1

2

3

4





AF24-MFT95 USused with a Series 90 con-troller and a Series 90 low limit control

1

2

3

4

1 Common, Blk

2 + Hot, Red

3 W, Wht

4 R, Wht

5 B, Wht


AF24-MFT95 US

Line Volts

24 VAC Transformer

W B

W

B R

R

Series 90 high limit control - 280Ω


1

2

3

4





AF24-MFT95 US used with a Series 90 con-troller and a Series 90 high limit control

Typical wiring diagrams for multipleactuators used with the W973, W7100and T775 controllers.

Proportional Potentiometric Control

Wiring multiple actuators to a Series 90controller.

W01

5

W01

8

W02

0

W01

6

W01

9

W01

7

1

2

3

5

4






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Installation InstructionsQuick-Mount Visual Instructions for Mechanical Installation

IND-AF2 Position Indicator(optional)

IND-AF2 Position Indicator(optional)

QUICK-MOUNT VISUAL INSTRUCTIONS

1. Rotate the damper to its fail-safe position. If the shaftrotates counterclockwise, mount the “CCW” side of the actu-ator out. If it rotates clockwise, mount the actuator with the“CW” side out.

2. If the universal clamp is not on the correct side of the actua-tor, move it to the correct side.

3. Slide the actuator onto the shaft and tighten the nuts on theV-bolt with a 10mm wrench to 6-8 ft-lb of torque.

4. Slide the anti-rotation strap under the actuator so that itengages the slot at the base of the actuator. Secure thestrap to the duct work with #8 self-tapping screws.

NOTE: Read the “Standard Mounting” instructions, on the nextpage, for more detailed information.

min. 3 1/2"

[90] min. 3/4"

[20]

®

Removefor 3/4” to 1.05”shafts

Dimensions (All numbers in brackets are in millimeters.)

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Mechanical Installation

Standard Mounting

70

60

50

40

30

20

10

02

34 6 8 10

5 7 9

Dam

per A

rea

(sq.

ft.)

Torque Loading (in-lb/ sq. ft.)

Torque LoadingChart

Mechanical Operation

The actuator is mounted directly to a damper shaft up to 1.05” in diameter by means of its universal clamp. A crankarm and sever-al mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. The AF seriesactuators provide true spring return operation for reliable fail-safe application and positive close-off on air tight dampers. The springreturn system provides constant torque to the damper with, and without, power applied to the actuator. The AF…-S versions areprovided with 2 built-in auxiliary switches. These SPDT switches are provided for safety interfacing or signaling, for example, for fanstart-up. The switching function at the fail-safe position is fixed at +5°, the other switch function is adjustable between +25 to +85°.

Automatic Airtight Dampers/Manual Override

The AF series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The AF has a uniquemanual positioning mechanism which allows the setting of any damper position within its 95° of rotation. A pre-tensioned springautomatically tightens damper when power is applied to the actuator, compensating for damper seal deterioration. The actuator isshipped at +5° (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. When power isapplied, the manual mechanism is released and the actuator drives toward the full fail-safe position.

Note:The AF…series actuator is shipped with the manualoverride adjusted for a +5° position at the universal clamp(not at full fail-safe, 0° ). This allows for automatic compres-sion of damper blade seals when the actuator is in use, pro-viding tight shut-off. This assumes that the damper is to havetight shut-off at the fail-safe position. If tight close-off isdesired at the opposite direction from fail-safe, the manualoverride should be released so the actuator can go to the fullfail-safe position. See the manual override instructions.

1. Manually move the damper to the fail-safe position (usuallyclosed). If the shaft rotated counterclockwise ( ), thisis a CCW installation. If the shaft rotated clockwise ( ),this is a CW installation. In a CCW installation, the actuatorside marked “CCW” faces out, while in a CW installation,the side marked “CW” faces out. All other steps are identi-cal.

2. The actuator is usually shipped with the universal clampmounted to the “CCW” side of the actuator. To test for

Determining Torque Loading and Actuator Sizing

Damper torque loadings, used in selecting the correct size actua-tor, should be provided by the damper manufacturer. If thisinformation is not available, the following general selectionguidelines can be used.

Damper Type Torque Loading

Opposed blade, without edge seals, 3 in-lb/sq. ft.for non-tight close-off applications

Parallel blade, without edge seals, 4 in-lb/sq. ft.for non-tight close-off applications

Opposed blade, with edge seals, 5 in-lb/sq. ft.for tight close-off applications

Parallel blade, with edge seals, 7 in-lb/sq. ft.for tight close-off applications

The above torque loadings will work for most applications under2 in. w.g. static pressure or 1000 FPM face velocity. For appli-cations between this criteria and 3 in. w.g. or 2500 FPM, thetorque loading should be increased by a multiplier of 1.5. If theapplication calls for higher criteria up to 4 in. w.g. or 3000 FPM,use a multiplier of 2.0.

General Information

Belimo actuators should be mounted indoors in a dry, relatively clean environment free from corrosive fumes. If the actuator is tobe mounted outdoors, a protective enclosure must be used to shield the actuator. For new construction work, order dampers with extended shafts. Instruct the installing contractor to allow space for mounting and service of the Belimo actuator on the shaft. The damper shaft must extend at least 3 1/2" from the duct. If the shaft extends less than 3-1/2" or if an obstruction blocks access, the shaft can be extended with the AV 10-18 shaft extension accessory or the actuator may bemounted in its short shaft configuration.

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Installation InstructionsMechanical Installation

adequate shaft length, slide the actuator over the shaftwith the side marked “CCW” (or the “CW” side if this is theside with the clamp). If the shaft extends at least 1/8”through the clamp, mount the actuator as follows. If not,go to the Short Shaft Installation section.

Fig. A Universal Clamp and IND-AF2 Pointer (optional)positions indicating fail-safe and pre-load settings

3. If the clamp is not on the correct side as determined in step#1, re-mount the clamp as follows. If it is on the correctside, proceed to step #5. Look at the universal clamp. Ifyou are mounting the actuator with the “CCW” side out,position the clamp so that the pointer section of the tab ispointing to 0° (see Fig. C) and the spline pattern of theclamp mates with spline of the actuator. Slip the clampover the spline. (Use the same procedure if the “CW” side isout.) If your application requires a mechanical minimumposition, read the Rotation Limiting, Mechanical MinimumDamper Position section.

4. Lock the clamp to the actuator using the retaining clip. 5. Verify that the damper is still in its full fail-safe position.6. Slide the actuator over the shaft.7. Position the actuator in the desired location.8. Tighten the two nuts on the clamp using a 10mm wrench

or socket using 6-8 ft-lb of torque.9. Slip the stud of the anti rotation strap into the slot at the

base of the actuator. The stud should be positionedapproximately 1/16 of an inch from the closed end of theslot. Bend the strap as needed to reach the duct. Attachthe strap to the duct with #8 self tapping screws.

Short Shaft InstallationIf the shaft extends at least 3/4” from the duct, follow thesesteps:1. Determine the best orientation for the universal clamp on

the back of the actuator. The best location would be whereyou have the easiest access to the V bolt nuts on theclamp.

2. Engage the clamp to the actuator as close as possible tothe determined location.

3. Lock the clamp in place using the remaining retainer clip.4. Verify that the damper is still in its full fail-safe position.5. Slide the actuator over the shaft.6. Position the actuator in the desired location.7. Tighten the two nuts on the clamp using a 10mm wrench

or socket using 6-8 ft-lb of torque.8. Slip the stud of the anti-rotation strap into the slot at the

base of the actuator. The stud should be positionedapproximately 1/16 of an inch from the closed end of theslot. Bend the strap as needed to reach the duct. Attachthe strap to the duct with #8 self tapping screws.

9. If damper position indication is required, use the optionalIND-AF2 pointer. See Fig. A.

Jackshaft InstallationThe AF… series actuator is designed for use with jackshaftsup to 1.05” in diameter. In most applications, the AF actuatormay be mounted in the same manner as a standard dampershaft application. If more torque is required than one AF actu-ator can provide, a second AF actuator may be mounted tothe jackshaft using the ZG-102 multiple actuator mountingbracket. See wiring guide for wiring details.

Correct pointer mountingposition when actuator isat 5° preload.

-5-5

Correct pointer mountingposition if actuator is atfull fail-safe.

-

Correct clamp mountingposition when actuator isshipped from factory(with 5° preload)

CW

Correct clamp mountingposition if actuator is atfull fail-safe.

-

CCW

CWCCW

CWCCW

CWCCW

30

20

100

30

20

10

0

30

20

100

40

30

20

100

40

30

20

100

30

20

100

30

20

100

30

20

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40

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Mounting:If the actuators are mounted onthe opposed ends of the shaft,the actuator direction must beselected carefully. Usually, thedirection of rotation is reversed.

AF actuators which may beused on one shaft:

MaxQuantity

Model Per Shaft

AF24 (-S) USAF120 (-S) US 4AF230 (-S) US

AF24-SR US 4

AF24-MFT(-S) US 4

30

20

10

0

CCW

30

20

100

-5

Correct clamp mountingposition if actuator is atfull fail-safe.

4030

20

10

0-5

40

30

20

100

-5

Correct pointer mountingposition if actuator is atfull fail-safe.

CW

CCW CW

AF

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Mechanical Installation

Multiple Actuator MountingIf more torque is required than one AF actuator can provide, asecond AF actuator may be mounted to the shaft using theZG-102 multiple mounting bracket. Notes:The manual positioning mechanism cannot be used in

multiple actuator applications.

Special Wiring and Additional Information: See wiring guide

Rotation LimitationThe angle of rotation limiter, ZDB-AF2, is used in conjunctionwith the tab on the universal clamp or IND-AF2 position indicatorwhich comes with the ZDB-AF2. In order to function properly,the clamp or indicator must be mounted correctly. See Fig. A.

The ZDB-AF2 may not work in certain mounting orientationsusing the ZG-106 or ZG-107 mounting brackets. It will not workwith the ZG-108 mounting bracket. Limiting the damper rotationmust be accomplished by adjusting the crankarm linkage.

The ZDB-AF2 may be used in 2 ways to control the rotationaloutput of the AF series actuator. One use is in the applicationwhere a damper has a designed rotation less than 90°. Anexample would be a 45° or 60° rotating damper. The otherapplication would be to set a minimum damper position whichcan be easily set or changed without having to remove theactuator from the damper.

Damper rotation limiting1. Determine the amount of damper rotation required.2. Locate the Angle of Rotation Limiter (ZDB-AF2) on the

actuator so that its edge lines up with the degree grad-uation on the actuator face which corresponds with therequired rotation. See Fig. C.

3. Find the appropriate cross-hair location through theslot of the limiter. This is the screw mounting location.

4. Pierce through the label material to allow easy fasten-ing of the retaining screw.

5. Position the limiter back to the desired position, mak-ing sure the locating “teeth” on the limiter are engagedinto the locating holes on the actuator.

6. Fasten the limiter to the actuator using the self tappingscrew provided.

7. Test the damper rotation either manually with the man-ual crank or apply power and if required, a control sig-nal. Re-adjust if necessary.

Mechanical minimum damper positionIn order to use this procedure, the actuator must be mount-ed for short shaft mounting. See pages 8 & 10.1. Position the damper to its minimum position by using

the manual crank or by providing the appropriate con-trol signal to the AF24… modulating type actuator.

2. Place the indicator on to the actuator spline in theapproximate position shown in Fig. D. Fasten it withthe retaining clip. Note that the mounting orientation isdifferent than the mounting used for Damper RotationLimiting.

3. Place the ZDB-AF2 rotation limiter on the actuator sothat it either makes contact with, or is as close as pos-sible to, the edge of the indicator. See Fig. E. Makesure that the locating teeth are engaged into the locat-ing holes on the actuator. If all of the mounting teethdo not align with the holes, the mounting location ofthe indicator to the spline may have to be moved. Thelimiter would then be remounted to get the best posi-tion match of both parts.

4. Find the cross-hair location through the slot of the lim-iter. This is the screw mounting location.

5. Pierce through the label material to allow easy fasten-ing of the retaining screw.

6. Fasten the limiter to the actuator using the self tappingscrew provided.

7. Test the damper operation either manually with themanual crank or apply power and if required, a controlsignal. Re-adjust if necessary.

®

20

3040

Screw secured atthese cross hairs

20

3040

Secure angle-of-rotation limiter

Screw

Philips screwdriver

20

3040

Angle of rotation is now set at 40°.

Fig. C ZDB-AF2 Securing the Angle of Rotation Limiter

100

90

80

70

60

50

40

30

20

100

100

90

80

70

60

50

40

30

20

10

0

CWCCW

CWCCW

60

50

40

30

20

100

60

50

40

30

20

100

Fig. D

Fig. E

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Installation Instructions ®

This method should not be used for outside air damper appli-cations. The damper will never go to the full close-off position.This may cause coils to freeze or other system problems. TheAF24-SR (-S) US wired to either the SGA24 or SGF24 can beused for minimum position setting and still provide full close-off.

Manual overrideThe AF series actuators can be manually positioned to easeinstallation or for emergency positioning.

1. The manual override will only work if no power is availableto the actuator.

2. Insert the manual crank (shipped with the actuator) intothe hexagon hole located on either side of the actuator. Anillustration, located on the label, shows the location.

3. Turn the crank in the direction shown on the label (clock-wise on the “CW” side, counterclockwise on the “CCW”side). It will take approximately 19 revolutions to rotatethe full 95° of rotation.

4. To lock the actuator in the required position, rotate thecrank quickly in the opposite direction, 1/2 of a revolution. The“lock closed” icon on the label shows the correct direction.

5. The manual override may be disengaged in 2 ways. - Rotate the crank about a 1/4 revolution in the same

direction as the initial winding. The “lock open” iconshows the correct direction.

- Apply power to wire 1 and 2. The actuator will automati-cally disengage the override function and will go to the“on” position in the case of the on-off versions. Or, in thecase of the proportional versions, go to the 0 signal posi-tion and then go to the position corresponding to thecontrol signal. The actuator will now work normally.

Testing the installation without power The actuator/damper installation may be tested without powerat the actuator. Refer to the manual positioning section of theinstructions. Move the damper to its full non-fail-safe positionusing the manual crank. Disengage the manual positionmechanism and have the damper go to full fail-safe position.Correct any mechanical problems and retest.

Auxiliary SwitchesThe AF series actuators may be ordered with 2 built-in SPDTauxiliary switches used for safety interfacing or signalling, forexample, for fan start-up. The switch position near the fail-safeposition is fixed at 5°. The other is adjustable between 25 and85° of rotation. The crank, supplied with the actuator, or a 3mmallen wrench is used to adjust the switching position.

Switch Rating

Voltage Resistive Load Inductive Load

120 VAC 7A 5A

250 VAC 7A 2.5A

Two methods may be used to adjust the switching point of theadjustable switch.

Method 1 - See Fig. F1 The actuator must be in its fail-safe position.2. Insert the crank into the hexagon shaped hole located in

the center of the adjustable switch pointer.3. Rotate the crank until the switch pointer is at the desired

switch point in degrees as shown.

Method 2 - See Fig. G1. Position the damper to the point at which you want the

switch to activate. This may be done by using the manualoverride or by providing the appropriate proportional sig-nal to AF24… modulating type actuator. The position ofthe switch pointer is not important during this step.

2. Insert the crank into the hexagon shaped hole located inthe center of the adjustable switch pointer.

3. Rotate the switch pointer to just past the switch point indi-cating arrow as shown.

30 4050

607080

25…85°

Factory setting 85°

30 4050

607080

25…85°

Rotate withcrank handle

30 4050

607080

25…85°

60° set

Crank Handle

30 4050

607080

25…85°

Actuatorafter locking

30 4050

607080

25…85°

Switch operates

30 4050

607080

25…85°

Switch doesnot operate

Crank Handle

Fig. F

Fig. G

Winding the damper actuator

- insert crank handle- turn handle in direc-

tion of arrow

Locking the damper actuator

- rotate crank handle1/2 turn in the direc-tion shown by the“locked” icon.

Unlocking the damper actuator

(2 options)- rotate crank handle

1/4 turn in the directionshown by the“unlocked” icon.

- remote control by sup-plying power to theunit for > than 3 sec.

AF…series

AF

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Non-direct mounting methods

KH-AF Non-direct mounting with ZG-108 mounting bracket Multiple dampers direct coupled to one actuator withlinkage to operate the other damper.

KH-AF crankarm including retaining ring. Caution: theretaining clip supplied with the clamp is not used to mount theKH-AF crankarm.

The KH-AF (-1) crankarm is used in non-direct coupledmounting applications. The KH-AF (-1) may also be used tosimultaneously direct couple to a damper shaft and provide anadditional crank arm connection to a second damper. TheKH-AFV V-bolt kit must be used for this non-direct application(see illustration below).

Two sizes are available:KH-AF For round shafts up to 3/4” or square shafts up to 5/8”KH-AF-1For jackshafts up to 1.05”

KH-AFV V-bolt kit for KH-AF(-1) crankarm

Note: KH-AF (-1) crankarms cannot be used on AF Series 1 actuators.

KH-AF (-1)crankarmwith KH-AFVV-bolt kit

KH-8crankarm

Dimensions (All numbers in brackets are in millimeters.)

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General The AF series actuators utilize brushless DC motor technolo-gy. The AF uses this motor in conjunction with an ApplicationSpecific Integrated Circuit (ASIC). In the On-Off versions ofthe AF, the ASIC monitors and controls the actuator’s rotationand a digital rotation sensing function to prevent damage tothe actuator. The AF24… modulating type actuators incorpo-rate a built in microprocessor. The microprocessor providesthe intelligence to the ASIC to provide a constant rotation rateand knows the actuator’s exact zero position.

Brushless DC motor operation Belimo’s brushless DC motor spins by reversing the poles ofstationary electromagnets housed inside of a rotating perma-nent magnet. The electromagnetic poles are switched by aspecial ASIC circuit developed by Belimo. Unlike the conven-tional DC motor, there are no brushes to wear or commutatorsto foul.

Overload protection The AF series actuators are protected from overload at allangles of rotation. The ASIC circuit constantly monitors therotation of the DC motor inside the actuator and stops thepulses to the motor when it senses a stall condition. The DCmotor remains energized and produces full rated torque to theload. This helps ensure that dampers are fully closed and thatedge and blade seals are always properly compressed.

Motor position detection Belimo brushless DC motors eliminate the need for poten-tiometers for positioning in modulating type actuators. Insidethe motor are three “Hall Effect” sensors. These sensorsdetect the spinning rotor and send pulses to the microproces-sor which counts the pulses and calculates the position towithin 1/3 of a revolution of the motor.

Electrical Operation

AF24-SR US actuators have built-in brushless DC motors which provide better accuracy and longer service life.

The AF24-SR US actuators are designed with a unique non-symmetrical deadband. The actuator follows an increasing ordecreasing control signal with a 50 mV resolution. If the signal changes in the opposite direction, the actuator will not responduntil the control signal changes by 50 mV. This allows these actuators to track even the slightest deviation very accurately, yetallowing the actuator to “wait” for a much larger change in control signal due to control signal instability.

Control Accuracy and Stability

SatisfiedControl Position

SatisfiedControl Position

MinimumControl Resolution

Minimum ReversedControl Deadband

Prior to Normal Control

50 mV

50 mV

AF Actuator responds to a 50 mV signalwhen not changing direction from stop

AF Actuator responds to a 50 mV signalwhen reversing direction from stop position.

The AF24-MFT US control accuracy and stability can be found in the MFT specifications, page 187.

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General Wiring Instructions

WARNING The wiring technician must be trained and experi-enced with electronic circuits. Disconnect power supplybefore attempting any wiring connections or changes. Makeall connections in accordance with wiring diagrams and followall applicable local and national codes. Provide disconnectand overload protection as required. Use copper, twisted pair,conductors only. If using electrical conduit, the attachment tothe actuator must be made with flexible conduit.

Always read the controller manufacturer's installation lit-erature carefully before making any connections. Followall instructions in this literature. If you have any questions,contact the controller manufacturer and/or Belimo.

Transformer(s)The AF24 . . actuators require a 24 VAC class 2 transformerand draws a maximum of 10 VA per actuator. The actuatorenclosure cannot be opened in the field, there are no parts orcomponents to be replaced or repaired.

– EMC directive: 89/336/EEC– Software class A: Mode of operation type 1– Low voltage directive: 73/23/EEC

CAUTION: It is good practice to power electronic or digitalcontrollers from a separate power transformer than that usedfor actuators or other end devices. The power supply designin our actuators and other end devices use half wave rectifica-tion. Some controllers use full wave rectification. When thesetwo different types of power supplies are connected to thesame power transformer and the DC commons are connectedtogether, a short circuit is created across one of the diodes inthe full wave power supply, damaging the controller. Only usea single power transformer to power the controller and actua-tor if you know the controller power supply uses half wave rec-tification.

Multiple actuators, one transformer Multiple actuators may be powered from one transformer provid-ed the following rules are followed:1. The TOTAL current draw of the actuators (VA rating) is

less than or equal to the rating of the transformer.2. Polarity on the secondary of the transformer is strictly fol-

lowed. This means that all No. 1 wires from all actuatorsare connected to the common leg on the transformer andall No. 2 wires from all actuators are connected to thehotleg. Mixing wire No. 1 & 2 on one leg of the trans-former will result in erratic operation or failure of the actua-tor and/or controls.

Multiple actuators, multiple transformersMultiple actuators positioned by the same control signal maybe powered from multiple transformers provided the followingrules are followed:1. The transformers are properly sized.2. All No. 1 wires from all actuators are tied together and tied

to the negative leg of the control signal. See wiring diagram.

Wire length for AF… actuatorsKeep power wire runs below the lengths listed in the Fig. H. Ifmore than one actuator is powered from the same wire run,divide the allowable wire length by the number of actuators todetermine the maximum run to any single actuator. Example: 3 actuators, 16 Ga wire

350 Ft ÷ 3 Actuators = 117 Ft. Maximum wire run

Maximum wire length:

Wire Size Max. Feet. Wire Size Max. Feet12 Ga 900 Ft. 18 Ga 225 Ft.14 Ga 550 Ft. 20 Ga 125 Ft. 16 Ga 350 Ft. 22 Ga 60 Ft.

Fig. H

Wire Type and Wire Installation TipsFor most installations, 18 or 16 Ga. cable works well with theAF24. . actuators. Use code-approved wire nuts, terminalstrips or solderless connectors where wires are joined. It isgood practice to run control wires unspliced from the actuatorto the controller. If splices are unavoidable, make sure thesplice can be reached for possible maintenance. Tape and/orwire-tie the splice to reduce the possibility of the splice beinginadvertently pulled apart.

The AF24… proportional actuators have a digital circuit that isdesigned to ignore most unwanted input signals (pickup). Insome situations the pickup may be severe enough to causeerratic running of the actuator. For example, a large inductiveload (high voltage AC wires, motors, etc.) running near thepower or control wiring may cause excessive pickup. Tosolve this problem, make one or more of the followingchanges:1. Run the wire in metallic conduit.2. Re-route the wiring away from the source of pickup.3. Use shielded wire (Belden 8760 or equal). Ground the

shield to an earth ground. Do not connect it to the actua-tor common.

Initialization of the AF24-SR US, and AF24-MFT US When power is initially applied, the actuator will first release itsmanual preload position (This assumes a manual position hasbeen set). The actuator will then rotate to the full fail-safe posi-tion. At this point the microprocessor recognizes that the actua-tor is at full fail-safe and uses this position as the base for all ofits position calculations. The microprocessor will retain the ini-tialized zero during short power failures of up to 20 seconds.The AF24-MFT US will also return to its position prior to the20-second-or-less power loss. For power failures greater than20 seconds, the actuator would naturally return to its full fail-safe position prior to the microprocessor losing its memory.The actuator will also re-initialize if the manual position mecha-nism is used.

Installation InstructionsGeneral Wiring

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Startup and CheckoutInstructions For AF24-SR US and AF24-MFT US + P-100…

Procedure

Control signal is applied to actuator.

Check power wiring. Correct anyproblems. See Note 1.

Turn reversing switch to the correctposition. Make sure the switch isturned all the way left or right.

Make sure the control signal positive(+) is connected to Wire No 3 andcontrol signal negative (-) is connect-ed to wire No. 1. Most control prob-lems are caused by reversing thesetwo wires. Verify that the reversingswitch is all the way CCW or CW.

Check input signal with a digital voltmeter (DVM). Make sure the input is within the range of the actuator.For AF24-SR US this is 2 to 10 VDCor 4 to 20 mA.Note: The input signal must be abovethe 2 VDC or 4 mA to have the actu-ator move.

Check damper torque requirement.

Actuator works properly. Test con-troller by following controller manu-facturer's instructions.

Expected Response

Actuator will move to its “ControlSignal” position.

Power supply rating should be ≥the total power requirement ofthe actuator(s). Minimum volt-age of 19.2 VAC or 21.6 VDC.

Actuator will move to its “ControlSignal” position.

Drives to “Control Signal” posi-tion

Input voltage or current shouldbe ±1% of what controller'sadjustment or programming indi-cate.

Torque requirement is ≤ actua-tor’s minimum torque.

Gives ExpectedResponse

Go To Step…

Actuator operatesproperlyStep 7

Power wiring correct-ed, actuator begins

to driveStep 1

Actuator operatesproperly.Step 7

Actuator operatesproperly.Step 7

Controller output(actuator input) is

correct. InputPolarity Correct.

Step 6

Defective Actuator.Replace Actuator -

See Note 2

Does Not GiveExpected Response

Go To Step…

No response at allStep 2

Operation isreversedStep 3

Does not drivetoward "ControlSignal Position"

Step 4

Power wiringcorrected, actuatorstill does not drive

Step 4

Does not drivetoward “ControlSignal Position”

Step 4

Step 5

Reprogram, adjustrepair or replace

controller as needed.Step 1

Recalculate actuatorrequirement and

correct installation.

Step

1.

2.

3.

4.

5.

7.

8.

Note 1 Check that the transformer(s) are sized properly. • If a common transformer is used, make sure that polarity is observed on the secondary. This means connect all No. 1

wires to one leg of the transformer and all No. 2 wires to the other leg of the transformer. • If multiple transformers are used with one control signal, make sure all No. 1 wires are tied together and tied to control

signal negative (-).• Controllers and actuators must have separate 24 VAC/VDC power sources.

Note 2 If failure occurs within 5 years from original installation date, notify Belimo and give details of the application.

AF24-SR US and AF24-MFT US + P-100… Electrical check-out procedure

®

af series spring return direct coupled actuator af series.pdfactuator may also be powered by 24 vdc....

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