Page 1
6
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
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 or LF series)
ZG106 or
ZG 107
bracket
Direct Coupling The Belimo Concept
Mount directly to 1.05” jackshafts.
New standard clamp fits standard 1/2”
shafts to 1.05” jackshafts.
Linkage is available when direct coupling is
not possible. (See Mounting Methods Guide
and Mechanical Accessories Documentation)
Remove
for 3/4”
to 1.05”
shafts
Torque: 133 in-lb ●●●●●●●●●●●●●●
Power supply : 24 VAC/DC ●●●● ●●●●
120 VAC ●●●●
230 VAC ●●
Control signal: ON-OFF ●●●●●●●●●●●●
Floating point ●●
2 to 10 VDC ●●
Feedback signa:l 2 to 10 VDC ●●
Motor: 150 sec constant ● ●●●●●●●●●●●●
Spring: <15 sec ●●●●●●●●●●●●●●
External direction of rotation switch ●●●●
Manual override ●● ●● ●● ●
Appliance rated cable, 18 GA ●●●●●●●●●●●●●●
Built-in auxiliary switch 2 SPDT ●●●
1 SPDT ●●●
Installation instructions......(p. 16–21) General wiring ..............(p. 22) Start-up and checkout (p. 25)
Electrical operations..........(p. 21) Special wiring ................(p. 23–24)
AF Series - at a glance
AF24 US (p. 8)
AF24-S US (p. 8)
AFR24 US (p. 8)
AFR24-S US (p. 8)
AF120 US (p. 10)
AF120-S US (p. 10)
AFR120 US (p. 10)
AFR120-S US (p.10)
AF230 US (p. 10)
AF230-S US (p. 10)
AFR24-3 US (p. 12)
AFR24-3-S US (p. 12)
AF24-SR US (p. 14)
AFR24-SR US (p. 14)
®
Page 2
7
D20230/ 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AF
A CLOSER LOOK…
AF Series Spring Return Direct Coupled Actuator
®
● Cut labor costs with simple direct coupling.
● True mechanical spring return - the most reliable failsafe.
● 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 change
actuator operation. Actuator returns to normal operation when
restriction is removed. (modulating actuators)
● Easy mechanical stop to adjust angle of rotation
(add ZDB-AF2 accessory).
● 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
(Not available with AFR… series)
● Need to change control direction?
Do it easily with a simple switch. (modulating actuators)
● Microprocessor-controlled brushless DC motor increases
actuator lifespan and reliability, provides constant running
time. (modulating actuators)
● Rugged metal housing withstands rough handling in the
mechanical room.
● 3 ft. appliance cable and conduit connector
eases installation.
● Double insulated - no need for separate safety ground
- A Belimo exclusive. (-S,120V, 230V models)
● Automatically compensates for damper seal wear, ensuring tight
close-off.
B
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l
i
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o
’
s
C
o
m
m
i
t
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e
n
t
t
o
Q
u
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t
y
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i
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1
9
9
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9
0
0
1
The Belimo Difference
● Customer Commitment.
Extensive product range. Competitive project pricing. Application assistance.
Same-day shipments. Free technical support. Unconditional 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.
20+ years direct coupled actuator design.
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
Page 3
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AF24 (-S) US, AFR24 (-S) US
On-off, spring return safety, 24 V
Torque min. 133 in-lb, for control of air dampers
Application:
For on-off, fail-safe control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications. Control is on-off from an auxiliary 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 and
several mounting brackets are available for applications where
the actuator cannot be direct coupled to the damper shaft.
Operation
The AF series actuators provide true spring return operation for
reliable fail-safe application and positive close off on air tight
dampers. The spring return system provides consistent torque
to the damper with, and without, power applied to the actuator.
The AF and AFR series provide 95° of rotation and are provided with a graduated position indicator showing -5° to 90°.
The AF has a unique manual positioning mechanism which
allows the setting of any damper position within its 95° of rotation. The AF and AFR series actuators are shipped in the zero
position (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. When power is
applied to the AF series, the manual mechanism is released.
When power is applied to the AFR series its “one time use”
mechanism is released. The actuators will now try to close
against the -5° position during its normal control operations.
The manual override can also be released physically by the
use of a crank supplied with the actuator (AF series).
The AF uses a brushless DC motor which is controlled by an
Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the actuator’s rotation and provides a digital
rotation sensing function to prevent damage to the actuator in
a stall condition. The actuator may be stalled anywhere in its
normal rotation without the need of mechanical end switches.
The AF24-S US version is provided with 2 built in auxiliary
switches. These SPDT switches are provided for safety interfacing or signaling, for example, for fan start-up. The switching
function at the fail-safe position is fixed at +5°, the other switch
function is adjustable between +25° to +85°. The AFR… series
actuators are provided with 1 SPDT switch, adjustable
between 5° to 85°.
Dimensions
(All numbers in brackets are metric.)
Technical Data AF24 (-S) US
Power supply 24 VAC ± 20% 50/60 Hz
24 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 cable
1/2” conduit connector
Electrical protection auxiliary switches are double insulated
Overload protection electronic throughout -5° to 90° rotation
Angle of rotation 95°, adjustable 30 to 90°w/ ZDB-AF2
Torque 133 in-lb [15 Nm] constant
Direction of rotation spring return can be selected by
CW/CCW mounting
Position indication visual indicator, -5° to 90° (-5° is
spring return position)
Manual override 3mm hex crank (shipped w/actuator)
Auxiliary switches 2 x SPDT 7A (2.5A) @ 250 VAC,
UL listed
one set at +5°, one adjustable 25°to 85°
Running time 150 sec. constant, independent of
load, spring return < 20 sec
Humidity 5 to 95% RH noncondensing
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.)
AFR24 (-S) US (same as above)
Position indication -5° to 90° position indication
Manual override Not available
Auxiliary switches 1 x SPDT 7A (2.5A) @ 250 VAC,
UL listed
adjustable 5°to 85°
8
D001
®
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
Standard:
1/2" to 1.05"
Optional*
3/8" to 3/4"
*with K4 US
clamp
0.65" [16.5]
[57]
2.24"
3.10" [78]
0.19" [5]
0.39" [10]
0.35" [9]
3.86" [98]
3.15" [80]
1.97"
[50]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.93"
[49]
Page 4
9
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AF24 (-S) US, AFR24 (-S) US
On-off, spring return safety, 24 V
®
Accessories
AV 10-18 Shaft extension
IND-AF2 Damper position indicator
K4 US Universal clamp for 3/8” to 3/4” shafts
K4-1 US Universal clamp for up to 1.05” dia jackshafts
K4-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-1
Tool-01 10 mm wrench
ZDB-AF2 Angle of rotation limiter
ZG-100 Universal mounting bracket
ZG-101 Universal mounting bracket
ZG-102 Multiple actuator mounting bracket
ZG-103 Universal mounting bracket
ZG-104 Universal mounting bracket
ZG-106 Mounting bracket for Honeywell
®
Mod IV replace-
ment or new crankarm type installations
ZG-107 Mounting bracket for Honeywell®Mod III or Johnson
®
Series 100 replacement or new crankarm type
installations
ZG-108 Mounting bracket for Barber Colman
®
MA 3../4..,
Honeywell®Mod III or IV or Johnson®Series 100
replacement or new crankarm type installations
ZG-AF 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 housing
ZS-300 NEMA 4X housing
For an overview of how to apply the accessories see pages
16 - 19. More detailed specifications can be found in our
Mechanical Accessories Guide. Refer to our Mounting
Methods Guide for application details.
Note: When using AF24 US and AF24-S US actuators,
only use accessories listed on this page.
Wiring diagrams
AF24 (-S) US, AFR24 (-S) US Typical Specification
On-off spring return damper actuators shall be direct coupled
type which require no crankarm and linkage and be capable of
direct mounting to a jackshaft up to a 1.05” diameter. The actuators must be designed so that they may be used for either
clockwise or counterclockwise fail-safe operation. Actuators
shall have a manual positioning mechanism accessible on its
cover. AFR… will not. Actuators shall use a brushless DC
motor and be protected from overload at all angles of rotation.
Run time shall be constant and independent of torque. If
required, 2 SPDT auxiliary switches shall be provided with one
switch having the capability of being adjustable. AFR, 1
SPDT actuators with switches must be constructed to meet the
requirement for Double Insulation so an electrical ground connection is not required to meet agency listings. Actuators shall
be UL listed and CSA certified, have a 5 year warranty, and be
manufactured under ISO 9001 International Quality Control
Standards. Actuators shall be as manufactured 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
5
6
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.
For end position indication, interlock control, fan startup, etc., AF24-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°.
AFR24-S US 1 x SPDT, 7A (2.5A) @ 250 VAC, UL
listed, 5° to 85°
Meets UL and CSA requirements without the need of an
electrical ground connection.
On-off wiring for AF24 US, AFR24 US
On-off wiring for AF24-S US, AFR24-S US
1 Common
2 + Hot
1
2
24 V AC Transf ormer
AF24 US
AFR24 US
Line
Volts
3
1 Common
2 + Hot
1
2
24 V AC Transf ormer
AF24-S US
Line
Volts
3
4
6
S1
S2
S3
S4
S5
S6
NC
NO
NC
NO
5°
25° to 85°
AFR24-S US
5
S1
S2
S3
NC
NO
5° to 85°
W001
W002
Page 5
Torque min. 133 in-lb, for control of air dampers
Application:
For on-off, fail-safe control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications. Control is on-off from an auxiliary 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 and
several mounting brackets are available for applications where
the actuator cannot be direct coupled to the damper shaft.
Operation
The AF series actuators provide true spring return operation for
reliable fail-safe application and positive close off on air tight
dampers. The spring return system provides consistent torque
to the damper with, and without, power applied to the actuator.
The AF and AFR series provide 95° of rotation and are provided with a graduated position indicator showing -5° to 90°. The
AF has a unique manual positioning mechanism which allows
the setting of any damper position within its 95° of rotation.
The AF and AFR series actuators are shipped in the zero
position (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. When power is
applied to the AF series, the manual mechanism is released.
When power is applied to the AFR series its “one time use”
mechanism is released. The actuators will now try to close
against the -5° position during its normal control operations.
The manual override can also be released physically by the
use of a crank supplied with the actuator (AF series).
The AF uses a brushless DC motor which is controlled by an
Application Specific Integrated Circuit (ASIC). The ASIC monitors
and controls the actuator’s rotation and provides a digital rotation
sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. The actuators
are 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 safety
interfacing or signaling, for example, for fan start-up. The
switching function at the fail-safe position is fixed at +5°, the
other switch function is adjustable between +25° to +85°. The
AFR… series actuators are provided with 1 SPDT switch,
adjustable between 5° to 85°.
Dimensions
(All numbers in brackets are metric.)
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AF120 (-S) US, AFR120 (-S) US / AF230 (-S) US
On-off, spring return safety, 120 or 230 VAC
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 W
holding: 2.3 W 2.5 W
Transformer sizing 10 VA 11 VA
Electrical connection 3 ft, 18 GA appliance cable
1/2” conduit connector
Electrical protection actuators are double insulated
Overload protection electronic throughout -5° to 90° rotation
Angle of rotation 95°, adjustable 30 to 90° w/ ZDB-AF2
Torque 133 in-lb [15 Nm] constant
Direction of rotation spring return can be selected by
CW/CCW mounting
Position indication visual indicator, -5° to 90° (-5° is
spring return position)
Manual override 3mm hex crank (shipped w/actuator)
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 of
load, spring return < 20 sec
Humidity 5 to 95% RH noncondensing
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 6.9 lbs (3.1 kg.)
AFR120 US (same as above)
Position indication -5° to 90° position indication
Manual override Not available, when powered the
actuator will drive to -5° for damper
pre-tensioning
AFR120-S US (same as above)
Position indication -5° to 90° position indication
Manual override Not available, when powered the
actuator will drive to -5° for damper
pre-tensioning
Auxiliary switches 1 x SPDT 7A (2.5A) @ 250 VAC,
UL listed
adjustable 5°to 85°
10
D001
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
Standard:
1/2" to 1.05"
Optional*
3/8" to 3/4"
*with K4 US
clamp
0.65" [16.5]
[57]
2.24"
3.10" [78]
0.19" [5]
0.39" [10]
0.35" [9]
3.86" [98]
3.15" [80]
1.97"
[50]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.93"
®
[49]
Page 6
11
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AF120 (-S) US, AFR120 (-S) / AF230 (-S) US
On-off, spring return safety, 120 or 230 VAC
Accessories
AV 10-18 Shaft extension
IND-AF2 Damper position indicator
K4 US Universal clamp for 3/8” to 3/4” shafts
K4-1 US Universal clamp for up to 1.05” dia jackshafts
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-1
Tool-01 10 mm wrench
ZDB-AF2 Angle of rotation limiter
ZG-100 Universal mounting bracket
ZG-101 Universal mounting bracket
ZG-102 Multiple actuator mounting bracket
ZG-103 Universal mounting bracket
ZG-104 Universal mounting bracket
ZG-106 Mounting bracket for Honeywell
®
Mod IV replace-
ment or new crankarm type installations
ZG-107 Mounting bracket for Honeywell
®
Mod III or Johnson
®
Series 100 replacement or new crankarm type
installations
ZG-108 Mounting bracket for Barber Colman
®
MA 3../4..,
Honeywell®Mod III or IV or Johnson®Series 100
replacement or new crankarm type installations
ZG-AF 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 housing
ZS-300 NEMA 4X housing
For an overview of how to apply the accessories see pages
16 - 19. More detailed specifications can be found in our
Mechanical Accessories Guide. Refer to our Mounting
Methods Guide for application details.
Note: When using AF120/230 US and AF120/230-S US
actuators, only use accessories listed on this page.
AF120 US, AFR120 (-S) US/AF230 US Typical Specification
On-off spring return damper actuators shall be direct coupled
type which require no crankarm and linkage and be capable
of direct mounting to a jackshaft up to a 1.05” diameter. The
actuators must be designed so that they may be used for
either clockwise or counterclockwise fail-safe operation.
Actuators shall have a manual positioning mechanism accessible on its cover. AFR… will not. Actuators shall use a
brushless DC motor and be protected from overload at all
angles of rotation. Run time shall be constant and independent of torque. If required, 2 SPDT auxiliary switches shall be
provided with one switch having the capability of being
adjustable. AFR, 1 SPDT actuators must be constructed to
meet the requirement for Double Insulation so an electrical
ground connection is not required to meet agency listings.
Actuators shall be UL listed and CSA certified, have a 5 year
warranty, and be manufactured under ISO 9001 International
Quality Control Standards. Actuators shall be as manufactured by Belimo.
Wiring diagrams
2
1
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power con-
sumption must be observed.
No ground connection is required.
Meets UL and CSA requirements without the need of an
electrical ground connection.
2
3
1
3
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power con-
sumption must be observed.
No ground connection is required.
For end position indication, interlock control, fan startup,
etc., AF120/230-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°.
AFR120-S US 1 x SPDT, 7A (2.5A) @ 250 VAC, UL
listed, 5° to 85°
Meets UL and CSA requirements without the need of an
electrical ground connection.
®
4
4
5
6
On-off wiring for AF120 US/AF230 US
On-off wiring for AF120-S US/AF230-S US
1 Neutral
2 Hot
1
2
120 V AC
AF120 US
AFR120 US
AF230 US
3
4
L1 N
L2 H
120 V AC
(230 VAC for AF230 US)
1 Neutral
2 Hot
1
2
AF120 US
AF230 US
3
4
6
S1
S2
S3
S4
S5
S6
NC
NO
NC
NO
5°
25° to 85°
AFR120-S US
5
S1
S2
S3
NC
NO
5° to 85°
L1 N
L2 H
W003
W004
Page 7
Torque min. 133 in-lb, for control of air dampers
Application
For modulation or on-off control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications.
The actuator is mounted directly to a damper shaft up to 1.05”
in diameter by means of its universal clamp. A crankarm and
several mounting brackets are available for applications where
the actuator cannot be direct coupled to the damper shaft.
Control is 3 wire, floating point from a triac or relay, or on-off
from an auxiliary contact from a fan motor contactor, controller, or manual switch. The AFR24-3-S US is constructed to
meet the requirements for Double Insulated devices. These units
do not require a ground connection to meet electrical code
requirements.
Operation
The AFR series actuators provide true spring return operation
for reliable fail-safe application and positive close-off on air
tight dampers. The spring return system provides consistent
torque to the damper with, and without, power applied to the
actuator.
The AFR series provides 95° of rotation and is provided with a
graduated position indicator showing -5° to 90°. The AFR
series actuators are shipped in the zero position (5° from full
fail-safe) to provide automatic compression against damper
gaskets for tight shut-off. When power is applied to the AFR
series its “one time use” mechanism is released.
The AFR uses a brushless DC motor which is controlled by an
Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the
ASIC to provide a constant rotation rate. The ASIC monitors
and controls the brushless DC motor’s rotation and provides a
digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in
its normal rotation without the need of mechanical end switches.
The AFR24-3-S version is provided with 1 built-in auxiliary
switch. This SPDT switch is provided for safety interfacing or
signaling, for example, for fan start-up. The switching function
is adjustable between 5 to 85°.
The AF24-MFT (-S) US actuator with P-30…series configurations provides for floating point control, manual override and
two auxiliary switches (-S). Please see the Multi-Function
Technology
®
documentation 2.5 for more details
Dimensions
(All numbers in brackets are metric.)
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AFR24-3 (-S) US
On-off, spring return reversible, floating point, 24V
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
Technical Data AFR24-3 (-S) US
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 6 W ; holding: 2 W
Transformer sizing 10 VA (class 2 power source)
Electrical connection 3 ft, 18 GA appliance cable
1/2” conduit connector
Electrical protection auxiliary switches are double insulated
Overload protection electronic throughout -5° to 90° rotation
Input impedance 1000 Ω (0.6w) control inputs
Angle of rotation 95°, adjustable 30 to 90° w/ ZDB-AF2
Torque 133 in-lb [15 Nm] constant
Direction of rotation spring: reversible with CW/CCW
mounting
motor: reversible with built-in switch
Position indication visual indicator, -5° to 90°
Manual override Not available
Auxiliary switches 1 x SPDT 7A (2.5A) @ 250 VAC, UL listed
(AF24-3-S) adjustable 5° to 85°
Running time 150 sec. constant, independent of
load, spring return < 20 sec
Humidity 5 to 95% RH noncondensing
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 metal
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.)
12
D002
®
Standard:
1/2" to 1.05"
Optional*
3/8" to 3/4"
3/8" to 5/8"
*with K4 US
clamp
0.65" [16.5]
[57]
2.24"
3.10" [78]
0.19" [5]
0.39" [10]
0.35" [9]
3.86" [98]
3.15" [80]
1.97"
[50]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.93"
[49]
Page 8
13
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AFR24-3 (-S) US
On-off, spring return reversible, floating point, 24V
Accessories
AV 10-18 Shaft extension
IND-AF2 Damper position indicator
K4 US Universal clamp for 3/8” to 3/4” shafts
K4-1 US Universal clamp for up to 1.05” dia jackshafts
K4-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-1
Tool-01 10 mm wrench
ZDB-AF2 Angle of rotation limiter
ZG-100 Universal mounting bracket
ZG-101 Universal mounting bracket
ZG-102 Multiple actuator mounting bracket
ZG-103 Universal mounting bracket
ZG-104 Universal mounting bracket
ZG-106 Mounting bracket for Honeywell
®
Mod IV replace-
ment or new crankarm type installations
ZG-107 Mounting bracket for Honeywell®Mod III or Johnson
®
Series 100 replacement or new crankarm type installations
ZG-108 Mounting bracket for Barber Colman®MA 3../4..,
Honeywell®Mod III or IV or Johnson®Series 100
replacement or new crankarm type installations
ZG-AF 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 housing
ZS-300 NEMA 4X housing
For an overview of how to apply the accessories see pages
16 - 19. More detailed specifications can be found in our
Mechanical Accessories Guide. Refer to our Mounting
Methods Guide for application details.
Note: When using AFR24-3 (-S) US actuators, only use
accessories listed on this page.
AFR24-3 US, AFR24-3-S US Typical Specification
Floating point, on-off spring return damper actuators shall be direct coupled type
which require no crankarm and linkage and be capable of direct mounting to a jackshaft up to a 1.05” diameter. The actuators must be designed so that they may be
used for either clockwise or counterclockwise fail-safe operation. Actuators shall
have an external direction of rotation switch to reverse control logic. Actuators shall
use a brushless DC motor and be protected from overload at all angles of rotation.
Run time shall be constant and independent of torque. If required, 1 SPDT auxiliary
switch shall be provided with having the capability of being adjustable. Actuators with
auxiliary switches must be constructed to meet the requirements for Double
Insulation so an electrical ground connection is not required to meet agency listings.
Actuators shall be UL listed and CSA certified, have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall
be as manufactured by Belimo.
®
Wiring Diagrams
On-Off control of AFR24-3 (-S) US
Triac sink
Auxiliary switches of AF24-3-S US
Triac sink with separate transformers
Floating point control of AFR24-3 (-S) US
2
3
4
5
6
7
1
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power consumption must be observed.
May also be powered by 24 VDC.
The Common connection from the actuator must be connected to the Hot connection
of the controller.
The actuator Hot must be connected to the control board Common.
For end position indication, interlock control, fan startup, etc., AFR24-3-S
US incorpo-
rates two built-in auxiliary switches: 1 x SPDT, 7A (2.5A) @250 VAC, UL listed,
adjustable 5° to 85°.
Meets UL & CSA requirements without the need of an electrical ground connection.
Notes:
Triac source
W005W006W007
W008
W009W0010
24 VAC Transformer
1
Line
Volts
a open
a closed
The indication of direction
is valid for switch position CW.
3
a
2
Blk (1) Common
Red (2) +
Wht (3) +
Wht (4) +
CCW CW
AFR24-3 (-S) US
Switch
Positions
a
(3)b(4)
Installation Side
x
xx
x
x
x
xx
x
x
x
x
x
x
x
x
x
x
x
x
x
CCW
Direction of Rotation Switch
CW
stop
x
x
CW
CCW
CCW
CW
stop stop stop
xx
x
x
x
x
x
x
xx
x
x
x
x
x
24 VAC Transformer
Line
Volts
The indication of direction
is valid for switch position CW.
Blk (1) Common
Red (2) +
Wht (3) +
Wht (4) +
CCW CW
AFR24-3 (-S) US
24 VAC Transformer
1
Line
Volts
ComHot
Controller
2
Blk (1) Common
Red
(2) + Hot
Wht
(3) +
(4) +
Wht
CCW CW
AFR24-3(-S) US
The indication of direction
is valid for switch position CW.
24 VAC Transformer
1
Line
Volts
ComHot
Controller
2
Blk (1) Common
Red
(2) + Hot
Wht
(3) +
(4) +
Wht
CCW CW
AFR24-3(-S) US
The indication of direction
is valid for switch position CW.
24 VAC Transformer
24 VAC Transformer
1
Line
Volts
Controller
1
Line
Volts
2
ComHot
Blk (1) Common
(2) + Hot
Red
Wht
(3) +
(4) +
Wht
CCW CW
AFR24-3 (-S) US
The indication of direction
is valid for switch position CW.
4
5
5
S1
NC
S2
S3
NO
AFR24-3-S US
6
5° to 85°
7
Page 9
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Torque min. 133 in-lb, for control of air dampers
Application
For proportional modulation of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications.
The actuator is mounted directly to a damper shaft up to 1.05”
in diameter by means of its universal clamp. A crankarm and
several mounting brackets are available for applications where
the actuator cannot be direct coupled to the damper shaft.
The actuator operates in response to a 2 to 10 VDC, with the
addition of a 500Ω resistor, a 4 to 20 mA control input from an
electronic controller or positioner. A 2 to 10 VDC feedback
signal is provided for position indication or master-slave applications.
Operation
The AF series actuators provide true spring return operation for
reliable fail-safe application and positive close-off on air tight
dampers. The spring return system provides constant torque to
the damper with, and without, power applied to the actuator.
The AF series provides 95° of rotation and is provided with a
graduated position indicator showing -5 to 90°. The AF has a
unique manual positioning mechanism which allows the setting of any damper position within its 95° of rotation. When
power is applied to the AFR series its “one time use” mechanism is released. The actuator is shipped in the zero position
(5° from full fail-safe) to provide automatic compression
against damper gaskets for tight shut-off. When power is
applied, the manual mechanism is released and the actuator
drives toward the full fail-safe position. The actuator will
memorize the angle where it stops rotating and use this point
for its zero position for its normal control operations. The
manual override can also be released physically by the use of
a crank supplied with the actuator.
The AF uses a brushless DC motor which is controlled by an
Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the
ASIC to provide a constant rotation rate and to know the actuator’s exact zero position. The ASIC monitors and controls
the brushless DC motor’s rotation and provides a digital rotation sensing function to prevent damage to the actuator in a
stall condition. The actuator may be stalled anywhere in its
normal rotation without the need of mechanical end switches.
Dimensions
(All numbers in brackets are metric.)
AF24-SR US, AFR24-SR US
Proportional damper actuator, spring return safety, 24 V for 2 to 10 VDC, 0 to 20 V phasecut and 4 to 20 mA control signal.
Output signal of 2 to 10 VDC for position indication
Technical Data AF24-SR (-S) US
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 6 W ; holding: 2 W
Transformer sizing 10 VA (class 2 power source)
Electrical connection 3 ft, 18 GA appliance cable
1/2” conduit connector
Overload protection electronic throughout 0 to 95° rotation
Operating range 2 t o 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°
Torque 133 in-lb [15 Nm] constant
Direction of rotation spring return reversible with CW/CCW
mounting. Control direction selected by
switch: CW=CW with decrease in signal
CCW=CCW with a decrease in signal
Position indication visual indicator, -5° to 90° (-5° is spring
return position)
Manual override 3mm hex crank (shipped w/actuator)
Running time 150 sec. constant, independent of load,
spring return < 20 sec
Humidity 5 to 95% RH noncondensing
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 metal
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.)
AFR24-SR US (same as above)
Position indication -5° to 95°
Manual override Not available
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
14
D001
Standard:
1/2" to 1.05"
Optional*
3/8" to 3/4"
*with K4 US
clamp
0.65" [16.5]
[57]
2.24"
3.10" [78]
0.19" [5]
0.39" [10]
0.35" [9]
3.86" [98]
3.15" [80]
1.97"
[50]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.93"
®
[49]
Page 10
15
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
AF24-SR US, AFR24-SR US
Proportional damper actuator, spring return safety, 24 V for 2 to 10 VDC and 4 to 20 mA control signal.
Output signal of 2 to 10 VDC for position indication
Accessories
AV 10-18 Shaft extension
IND-AF2 Damper position indicator
K4 US Universal clamp for 3/8” to 3/4” shafts
K4-1 US Universal clamp for up to 1.05” dia jackshafts
K4-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-1
Tool-01 10 mm wrench
SGA24 Min. and/or man. positioner in NEMA 4 housing
SGF24 Min. and/or man. positioner for flush panel mounting
ZG-R01 500Ω resistor for 0 to 20 mA control signal
ZDB-AF2 Angle of rotation limiter
ZG-100 Universal mounting bracket
ZG-101 Universal mounting bracket
ZG-102 Multiple actuator mounting bracket
ZG-103 Universal mounting bracket
ZG-104 Universal mounting bracket
ZG-106 Mounting bracket for Honeywell
®
Mod IV replace-
ment or new crankarm type installations
ZG-107 Mounting bracket for Honeywell
®
Mod III or Johnson
®
Series 100 replacement or new crankarm type
installations
ZG-108 Mounting bracket for Barber Colman
®
MA 3../4..,
Honeywell
®
Mod III or IV or Johnson®Series 100
replacement or new crankarm type installations
ZG-AF 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 housing
ZS-300 NEMA 4X housing
For an overview of how to apply the accessories see pages
16 - 19. More detailed specifications can be found in our
Mechanical Accessories Guide. Refer to our Mounting
Methods Guide for application details.
Note: When using AFR24-SR US actuators, only use
accessories listed on this page.
Wiring diagrams
2
1
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power con-
sumption and input impedance must be observed.
Actuator may also be powered by 24 VDC.
The ZG-R01 500Ω resistor converts the 4 to 20 mA
control signal to 2 to 10 VDC.
Only connect common to neg. (—) leg of control circuits
4
5
3
®
AFR24-SR US Typical Specification
Spring return control damper actuators shall be direct coupled type
which require no crankarm and linkage and be capable of direct
mounting to a jackshaft up to a 1.05” diameter. The actuator must
provide 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 from
an electronic controller or positioner. The actuators must be
designed so that they may be used for either clockwise or counterclockwise fail-safe operation. Actuators shall have control direction of
rotation switch accessible on its cover. Actuators shall use a brushless
DC motor controlled by a microprocessor and be protected from overload at all angles of rotation. Run time shall be constant, and independent of torque. A 2 to 10 VDC feedback signal shall be provided
for position feedback or master-slave applications. Actuators shall be
UL listed and CSA certified, have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards.
Actuators shall be as manufactured by Belimo.
1 Common
2 + Hot
3 Y Input, 0 to 10V
5 U Output 2 to 10V
1
24 VA C Transf ormer
5
3
2
4
Control Signal
(+)
4 to 20 mA
(–)
Feedback Signal
(+)
2 to 10 VDC
(–)
Ω
500Ω
Line
Volts
1
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 VA C Transf ormer
AFR24-SR US
AF24-SR US
AFR24-SR US
AF24-SR US
Line
Volts
1
W011
Page 11
16
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
Quick-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 shaft
rotates counterclockwise, mount the “CCW” side of the actuator 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 actuator, move it to the correct side.
3. Slide the actuator onto the shaft and tighten the nuts on the
V-bolt with a 10mm wrench to 6-8 ft-lb of torque.
4. Slide the anti-rotation strap under the actuator so that it
engages the slot at the base of the actuator. Secure the
strap to the duct work with #8 self-tapping screws.
NOTE: Read the “Standard Mounting” instructions, on the next
page, for more detailed information.
min. 3 1/2"
[90]
min. 3/4"
[20]
Remove
for 3/4”
to 1.05”
shafts
®
Page 12
17
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
Mechanical Installation
Standard Mounting
Torque Loading
Chart
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 several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. The AF series
actuators provide true spring return operation for reliable fail-safe application and positive close-off on air tight dampers. The spring
return system provides constant torque to the damper with, and without, power applied to the actuator. The AF…-S versions are
provided with 2 built-in auxiliary switches. These SPDT switches are provided for safety interfacing or signaling, for example, for fan
start-up. The switching function at the fail-safe position is fixed at +5°, the other switch function is adjustable between +25 to +85°.
The AFR… series are provided with 1 x SPDT 7A (2.5A) @ 250 VAC, UL listed adjustable switch, 5° to 85°.
Automatic Airtight Dampers/Manual Override
The AF series provides 95° of rotation and is provided with a graduated position indicator showing -5 to 90°. The AF has a unique
manual positioning mechanism which allows the setting of any damper position within its 95° of rotation. A pre-tensioned spring
automatically tightens damper when power is applied to the actuator, compensating for damper seal deterioration. The actuator is
shipped in the 0 position (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. When
power is applied, the manual mechanism is released and the actuator drives toward the full fail-safe position. While the AFR…
series actuators do not have a manual override they do provide the -5° pre-tensioning feature.
Note:The AF…series actuator is shipped with the manual
override adjusted for a 0° position at the universal clamp (not
at full fail-safe, -5° ). This allows for automatic compression of
damper blade seals when the actuator is in use, providing
tight shut-off. This assumes that the damper is to have tight
shut-off at the fail-safe position. If tight close-off is desired at
the opposite direction from fail-safe, the manual override
should be released so the actuator can go to the full fail-safe
position. See the manual override instructions.
1. Manually move the damper to the fail-safe position (usually
closed). If the shaft rotated counterclockwise ( ), this
is a CCW installation. If the shaft rotated clockwise ( ),
this is a CW installation. In a CCW installation, the actuator
side marked “CCW” faces out, while in a CW installation,
the side marked “CW” faces out. All other steps are identical.
2. The actuator is usually shipped with the universal clamp
mounted 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 actuator, should be provided by the damper manufacturer. If this
information is not available, the following general selection
guidelines 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 under
2 in. w.g. static pressure or 1000 FPM face velocity. For applications between this criteria and 3 in. w.g. or 2500 FPM, the
torque loading should be increased by a multiplier of 1.5. If the
application 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 to
be 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 or the actuator may be mounted in its
short shaft configuration.
®
70
60
50
40
30
Damper Area (sq. ft.)
20
10
0
2
Torque Loading (in-lb/ sq. ft.)
46810
3
579
Page 13
18
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
Mechanical Installation
adequate shaft length, slide the actuator over the shaft
with the side marked “CCW” (or the “CW” side if this is the
side 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 correct
side, proceed to step #5. Look at the universal clamp. If
you are mounting the actuator with the “CCW” side out,
position the clamp so that the pointer section of the tab is
pointing to 0° (see Fig. C) and the spline pattern of the
clamp mates with spline of the actuator. Slip the clamp
over the spline. (Use the same procedure if the “CW” side is
out.) If your application requires a mechanical minimum
position, read the Rotation Limiting, Mechanical Minimum
Damper 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 positioned
approximately 1/16 of an inch from the closed end of the
slot. Bend the strap as needed to reach the duct. Attach
the strap to the duct with #8 self tapping screws.
Short Shaft Installation
If the shaft extends at least 3/4” from the duct, follow these
steps:
1. Determine the best orientation for the universal clamp on
the back of the actuator. The best location would be where
you have the easiest access to the V bolt nuts on the
clamp.
2. Engage the clamp to the actuator as close as possible to
the 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 positioned
approximately 1/16 of an inch from the closed end of the
slot. Bend the strap as needed to reach the duct. Attach
the strap to the duct with #8 self tapping screws.
9. If damper position indication is required, use the optional
IND-AF2 pointer. See Fig. A.
Jackshaft Installation
The AF… series actuator is designed for use with jackshafts
up to 1.05” in diameter. In most applications, the AF actuator
may be mounted in the same manner as a standard damper
shaft application. If more torque is required than one AF actuator can provide, a second AF actuator may be mounted to
the jackshaft using the ZG-102 multiple actuator mounting
bracket. See page 23 for wiring details.
Correct pointer mounting
position when actuator is
at 5° preload.
40
30
20
10
0
-5
40
30
20
10
0
-5
Correct pointer mounting
position if actuator is at
full fail-safe.
40
30
20
10
0
-5
40
30
20
10
0
-5
Correct clamp mounting
position when actuator is
shipped from factory
(with 5° preload)
30
20
10
0
-5
30
20
10
0
CW
Correct clamp mounting
position if actuator is at
full fail-safe.
30
20
10
0
-5
30
20
10
0
-5
CCW
CWCCW
CWCCW
CWCCW
®
Fig. B
Page 14
19
D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
Mechanical Installation
Multiple Actuator Mounting
If more torque is required than one AF actuator can provide, a
second AF actuator may be mounted to the shaft using the
ZG-102 multiple mounting bracket.
Notes:The manual positioning mechanism cannot be used in
multiple actuator applications. .
Special Wiring and Additional Information: See page 21
Rotation Limitation
The angle of rotation limiter, ZDB-AF2, is used in conjunction
with the tab on the universal clamp or IND-AF2 position indicator
which 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 orientations
using the ZG-106 or ZG-107 mounting brackets. It will not work
with the ZG-108 mounting bracket. Limiting the damper rotation
must be accomplished by adjusting the crankarm linkage.
The ZDB-AF2 may be used in 2 ways to control the rotational
output of the AF series actuator. One use is in the application
where a damper has a designed rotation less than 90°. An
example would be a 45° or 60° rotating damper. The other
application would be to set a minimum damper position which
can be easily set or changed without having to remove the
actuator from the damper.
Damper rotation limiting
1. 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 graduation on the actuator face which corresponds with the
required rotation. See Fig. C.
3. Find the appropriate cross-hair location through the
slot of the limiter. This is the screw mounting location.
4. Pierce through the label material to allow easy fastening of the retaining screw.
5. Position the limiter back to the desired position, making sure the locating “teeth” on the limiter are engaged
into the locating holes on the actuator.
6. Fasten the limiter to the actuator using the self tapping
screw provided.
7. Test the damper rotation either manually with the manual crank or apply power and if required, a control signal. Re-adjust if necessary.
Mechanical minimum damper position
In order to use this procedure, the actuator must be mounted 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 control signal to the AF24… modulating type actuator.
2. Place the indicator on to the actuator spline in the
approximate position shown in Fig. D. Fasten it with
the retaining clip. Note that the mounting orientation is
different than the mounting used for Damper Rotation
Limiting.
3. Place the ZDB-AF2 rotation limiter on the actuator so
that it either makes contact with, or is as close as possible to, the edge of the indicator. See Fig. E. Make
sure that the locating teeth are engaged into the locating holes on the actuator. If all of the mounting teeth
do not align with the holes, the mounting location of
the indicator to the spline may have to be moved. The
limiter would then be remounted to get the best position match of both parts.
4. Find the cross-hair location through the slot of the limiter. This is the screw mounting location.
5. Pierce through the label material to allow easy fastening of the retaining screw.
6. Fasten the limiter to the actuator using the self tapping
screw provided.
7. Test the damper operation either manually with the
manual crank or apply power and if required, a control
signal. Re-adjust if necessary.
®
Fig. C ZDB-AF2 Securing the Angle of Rotation Limiter
90
80
70
60
50
40
30
2
0
10
0
-5
9
0
80
70
60
50
4
0
30
20
1
0
0
-5
CWCCW
90
80
70
60
50
40
30
2
0
10
0
-
5
9
0
80
70
60
50
40
30
20
1
0
0
-5
9
CWCCW
Fig. D
Fig. E
Secure angle-of-
Screw secured at
these cross hairs
rotation limiter
40
40
30
30
20
20
Philips screwdriver
Angle of rotation
is now set at 40°.
40
30
20
Screw
Page 15
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D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
This method should not be used for outside air damper applications. The damper will never go to the full close-off position.
This may cause coils to freeze or other system problems. The
AF24-SR(-S) US wired to either the SGA24 or SGF24 can be
used for minimum position setting and still provide full close-off.
Manual override
The AF series actuators can be manually positioned to ease
installation or for emergency positioning.
1. The manual override will only work if no power is available
to the actuator.
2. Insert the manual crank (shipped with the actuator) into
the hexagon hole located on either side of the actuator. An
illustration, located on the label, shows the location.
3. Turn the crank in the direction shown on the label (clockwise on the “CW” side, counterclockwise on the “CCW”
side). It will take approximately 19 revolutions to rotate
the full 95° of rotation.
4. To lock the actuator in the required position, rotate the
crank 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” icon
shows the correct direction.
- Apply power to wire 1 and 2. The actuator will automatically disengage the override function and will go to the
“on” position in the case of the on-off versions. Or, in the
case of the proportional versions, go to the 0 signal position and then go to the position corresponding to the
control signal. The actuator will now work normally.
Testing the installation without power
The actuator/damper installation may be tested without power
at the actuator. Refer to the manual positioning section of the
instructions. Move the damper to its full non-fail-safe position
using the manual crank. Disengage the manual position
mechanism and have the damper go to full fail-safe position.
Correct any mechanical problems and retest.
Auxiliary Switches
The AF series actuators may be ordered with 2 built-in SPDT
auxiliary switches used for safety interfacing or signalling, for
example, for fan start-up. The switch position near the fail-safe
position is fixed at 5°. The other is adjustable between 25 and
85° of rotation. The crank, supplied with the actuator, or a 3mm
allen wrench is used to adjust the switching position. AFR…
series 1 x SPDT 7A (2.5A) @ 250 VAC,
UL listed
adjustable 5°to 85°
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 the
adjustable switch.
Method 1 - See Fig. F
1 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. G
1. Position the damper to the point at which you want the
switch to activate. This may be done by using the manual
override or by providing the appropriate proportional signal to AF24… modulating type actuator. The position of
the switch pointer is not important during this step.
2. Insert the crank into the hexagon shaped hole located in
the center of the adjustable switch pointer.
3. Rotate the switch pointer to just past the switch point indicating arrow as shown.
30
40
50
60
70
80
25…85°
Factory setting 85°
30
40
50
60
70
80
25…85°
Rotate with
crank handle
30
40
50
60
70
80
25…85°
60° set
Crank Handle
30
40
50
60
70
80
25…85°
Actuator
after locking
30
40
50
60
70
80
25…85°
Switch operates
30
40
50
60
70
80
25…85°
Switch does
not operate
Crank Handle
Fig. F
Fig. G
Winding the
damper actuator
- insert crank handle
- turn handle in direction of arrow
Locking the
damper actuator
- rotate crank handle
1/2 turn in the direction shown by the
“locked” icon.
Unlocking the
damper actuator
(2 options)
- rotate crank handle
1/4 turn in the direction
shown by the
“unlocked” icon.
- remote control by supplying power to the
unit for > than 3 sec.
(Not provided with AFR…series)
Factory setting 85°
Rotate with
crank handle 45° set
5…85°
10
20
30
40
50
60
70
80
5…85°
10
20
30
40
50
60
70
80
5…85°
10
20
30
40
50
60
70
80
Crank Handle
Fig. D
AF…series
AFR…series
®
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D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
Non-direct mounting methods and electrical operation
®
General
The AF series actuators utilize brushless DC motor technology. The AF uses this motor in conjunction with an Application
Specific Integrated Circuit (ASIC). In the On-Off versions of
the AF, the ASIC monitors and controls the actuator’s rotation
and a digital rotation sensing function to prevent damage to
the actuator. The AF24… modulating type actuators incorporate a built in microprocessor. The microprocessor provides
the intelligence to the ASIC to provide a constant rotation rate
and knows the actuator’s exact zero position.
Brushless DC motor operation
Belimo’s brushless DC motor spins by reversing the poles of
stationary electromagnets housed inside of a rotating permanent magnet. The electromagnetic poles are switched by a
special ASIC circuit developed by Belimo. Unlike the conventional DC motor, there are no brushes to wear or commutators
to foul.
Overload protection
The AF series actuators are protected from overload at all
angles of rotation. The ASIC circuit constantly monitors the
rotation of the DC motor inside the actuator and stops the
pulses to the motor when it senses a stall condition. The DC
motor remains energized and produces full rated torque to the
load. This helps ensure that dampers are fully closed and that
edge and blade seals are always properly compressed.
The AF… actuators are protected against overload by digital
technology located in the ASIC. The ASIC circuitry constantly
monitors the rotation of the brushless DC motor inside the
actuator and stops the pulsing to the motor when it senses a
stall condition. The motor remains energized and produces
full rated torque during stall conditions.
Motor position detection
Belimo brushless DC motors eliminate the need for potentiometers for positioning in modulating type actuators. Inside
the motor are three “Hall Effect” sensors. These sensors
detect the spinning rotor and send pulses to the microprocessor which counts the pulses and calculates the position to
within 1/3 of a revolution of the motor.
Electrical Operation
Crankarm for AF Series Actuators
KH-AF Non-direct mounting with ZG-108 mounting bracket
KH-AF crankarm including retaining ring. Caution: the
retaining clip supplied with the clamp is not used to mount the
KH-AF crankarm.
Multiple dampers direct coupled to one actuator with linkage to operate the other damper.
The KH-AF (-1) crankarm is used in non-direct coupled
mounting applications. The KH-AF (-1) may also be used to
simultaneously direct couple to a damper shaft and provide an
additional crank arm connection to a second damper. The
KH-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)
crankarm
with KH-AFV
V-bolt kit
KH-8
crankarm
Page 17
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D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Installation Instructions
General Wiring
General Wiring Instructions
WARNING The wiring technician must be trained and experienced with electronic circuits. Disconnect power supply
before attempting any wiring connections or changes. Make
all connections in accordance with wiring diagrams and follow
all applicable local and national codes. Provide disconnect
and overload protection as required. Use copper, twisted pair,
conductors only. If using electrical conduit, the attachment to
the actuator must be made with flexible conduit.
Always read the controller manufacturer's installation literature carefully before making any connections. Follow
all 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 transformer and
draws a maximum of 10 VA per actuator.
CAUTION: It is good practice to power electronic or digital
controllers from a separate power transformer than that used
for actuators or other end devices. The power supply design
in our actuators and other end devices use half wave rectification. Some controllers use full wave rectification. When these
two different types of power supplies are connected to the
same power transformer and the DC commons are connected
together, a short circuit is created across one of the diodes in
the full wave power supply, damaging the controller. Only use
a single power transformer to power the controller and actuator if you know the controller power supply uses half wave rectification.
Multiple actuators, one transformer
Multiple actuators may be powered from one transformer provided 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 followed. This means that all No. 1 wires from all actuators
are connected to the common leg on the transformer and
all No. 2 wires from all actuators are connected to the
hotleg. Mixing wire No. 1 & 2 on one leg of the trans-
former will result in erratic operation or failure of the actuator and/or controls.
Multiple actuators, multiple transformers
Multiple actuators positioned by the same control signal may
be powered from multiple transformers provided the following
rules 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… actuators
Keep power wire runs below the lengths listed in the Fig. H. If
more than one actuator is powered from the same wire run,
divide the allowable wire length by the number of actuators to
determine 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. Feet
12 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 Tips
For most installations, 18 or 16 Ga. cable works well with the
AF24. . actuators. Use code-approved wire nuts, terminal
strips or solderless connectors where wires are joined. It is
good practice to run control wires unspliced from the actuator
to the controller. If splices are unavoidable, make sure the
splice can be reached for possible maintenance. Tape and/or
wire-tie the splice to reduce the possibility of the splice being
inadvertently pulled apart.
The AF24… proportional actuators have a digital circuit that is
designed to ignore most unwanted input signals (pickup). In
some situations the pickup may be severe enough to cause
erratic running of the actuator. For example, a large inductive
load (high voltage AC wires, motors, etc.) running near the
power or control wiring may cause excessive pickup. To
solve this problem, make one or more of the following
changes:
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 actuator common.
Initialization of the AF24-SR US, AFR24-SR US
When power is initially applied, the actuator will first release
its preload position (This assumes a manual position has been
set, The AFR… is pre set from the factory). The actuator will
then rotate to the full fail-safe position. At this point the microprocessor recognizes that the actuator is at full fail-safe and
uses this position as the base for all of its position calculations. The microprocessor will retain the initialized zero during
short power failures of up to 20 seconds. For power failures
greater than 20 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 mechanism is used.
®
Page 18
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D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Special Wiring Diagrams
AF24-SR US
4 to 20 mA control with 2 to 10 VDC feedback output. The
feedback circuit can also be used with a 2 to 10 VDC input.
Override open. Both the override closed and the override
open circuit can be combined on one actuator. Wire the relay
contacts in series. Determine which signal has the highest
precedence and connect that relay electrically closest to the
actuator.
Minimum position control from a voltage signal and
through a SGA24/SGF24 positioner.
Override closed.
●
●
●
●
2
1
1
2
3
(–)
(+)
(–)
(+)
24 VAC Transformer
Line
Volts
4 to 20 mA
Control Signal
2 to 10 VDC
Feedback Signal
Provide overload protection and disconnect as required.
Connect actuator common (wire 1) to negative (–) leg
of control circuits only.
Up to 4 actuators may be connected in parallel. With
4 actuators wired to one 500Ω resistor, a +2% shift of
control signal may be required. Power consumption
must be observed.
The 500Ω resistor converts the 4 to 20 mA control signal to 2 to 10 VDC.
Actuator may also be powered by 24 VDC.
1 Common
2 + Hot
3 Y
1
Input, 2 to 10 V
5 U Output 2 to 10V
AF24-SR US
AFR24-SR US
Ω
500Ω
●
2
1
1
2
(–)
(+)
24 VAC Transformer
SPST
Line
Volts
Control Signal
2 to 10 VDC
Overide
“Closed” Circuit
Provide overload protection and disconnect as
required.
Actuator drives to the low signal position when there
is no signal to wire 3 (SPST relay energized). Adjust
reversing switch (L-R) so the low signal positions the
damper in its desired end position.
Actuator may also be powered by 24 VDC.
1 Common
2 + Hot
3
Y
1
Input, 2 to 10 V
5 U Output 2 to 10V
AF24-SR US
AFR24-SR US
c
●●
●
●
●
2
1
1
2
(–)
(+)
24 VAC Transformer
Line
Volts
Control Signal
2 to 10 VDC
Provide overload protection and disconnect as required.
Actuator drives to the high signal position when
24VAC hot is connected to wire 4 (SPST relay energized). Adjust Reversing Switch (L-R) so the high signal positions the damper to its desired position.
CAUTION: Do not short 24 VAC hot to the (+) leg of
the control signal or the controller may be damaged.
Actuator may also be powered by 24 VDC.
1
Common
2 + Hot
3 Y
1
Input, 2 to 10 V
5 U Output 2 to 10V
AF24-SR US
AFR24-SR US
Overide “Open”
Circuit
c
●
●
●
2
2
1
1
(–)
(+)
24 VAC Transformer
Line
Volts
Provide overload protection and disconnect as required.
SGA24 (NEMA 4 enclosure and SGF24 (panel mount)
are identical electrically. Both act as a manual positioner when no signal is present on terminal 4. Both
act as a minimum positioner when there is a signal on
terminal 4 (output on terminal 3 is either the control
signal or the knob setting, whichever is higher).
Actuator may also be powered by 24 VDC.
1
Common
2
+ Hot
3
Y
1
Input, 2 to 10 V
5 U Output 2 to 10V
AF24-SR US
AFR24-SR US
Control Signal
2 to 10 VDC
N.C.
SGA24
SGF24
1 Common
2 + Hot
3 Output
4 Control Input
3
4
4
To other
actuators
●
®
5
5
3
3
3
3
3
3
N.O.
●
Page 19
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D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Wiring multiple AF… and AFR… two position actuators
Wiring multiple AFR24-3 US actuators
Wiring multiple AFR24-SR US actuators
Mounting:
If the actuators are mounted on
the opposed ends of the shaft,
the actuator direction must be
selected carefully. Usually, the
direction of rotation is reversed.
AF actuators which may be
used on one shaft:
Max
Quantity
Model Per Shaft
AF24(-S) US
AFR24(-S) US
AF120(-S) US 4
AFR120(-3) US
AF230(-S) US
AF24-SR US 4
AFR24-SR(-S) US 4
AFR24-3(-S) US 4
1
1
Neutral
2
Hot
AF120 US
AFR120 US
AF230 US
AF120 US
AFR120 US
AF230 US
1 Common, Neutral
2 + Hot
3
3
●
L1 N
L2 H
●
●●
1
24 VAC Transformer
Line
Volts
1 Common
2 + Hot
1 Common, Neutral
2 + Hot
3
3
●
●●●
AF24 US
AFR24 US
AF24 US
AFR24 US
2
1
Provide overload protection and disconnect as required.
Actuator and controller must have separate transformers.
To reverse control rotation, use the reversing switch.
3
3
2
1
24 VAC Transformer
Line
Volts
Blk
(1)
Common
Red (2) +
Wht (3) +
Wht (4) +
AFR24-3 (-S) US
CCW CW
●
●
●
●
Blk (1) Common
Red (2) +
Wht (3) +
Wht (4) +
AFR24-3 (-S) US
CCW CW
●
●
●
●
The indication of direction
is valid for switch position CCW.
2
3
1
Provide overload protection and disconnect as
required.
Actuators may be connected in parallel. Power consumption must be observed.
May also be powered by 24 VDC.
●
24 VAC Transformer
Line
Volts
1 Common
2
+ Hot
3 Y
1
Input, 0 to 10 V
4
Y
2
5 U Output 2 to 10 V
(–)
(+)
Control Signal
2 to 10 VDC
3
2
1
AFR24-SR US
●
1
Common
2
+ Hot
3 Y
1
Input, 0 to 10 V
4
Y
2
5 U
3
AFR24-SR US
CCW CW
CCW CW
●
2
1
Provide overload protection and disconnect as required.
Actuator and controller must have separate transformers.
To reverse control rotation, use the reversing switch.
3
Special Wiring Diagrams
Wiring for multiple actuators on one shaft
Provide overload protection and
disconnect as required.
IMPORTANT Observe polarity on
secondary of transformers. Connect
all actuator Wire 1 and Control Signal
(–) to one leg of the transformer
(bold line) and all actuator Wire 2 to
the other leg of the transformer. Incorrect polarity can damage controller or cause
erratic operation.
Set reversing switch (L-R) as required by control logic.
When individual transformers are used for each actuator, the hot line from the transformer
only goes to one actuator. The common wire 1 of all actuators must be wired together.
Actuator may also be powered by 24 VDC.
2
3
4
4
2
1
To other
actuators
5
Parallel control of two or more actuators from a voltage
signal using either one transformer for all actuators or
individual transformers for each actuator.
●
●
●
●
●
1
24 VAC Transformer
Line
Volts
Control
Signal
1
Common
2 + Hot
3 Y
1
Input, 0 to 10 V
5 U Output 2 to 10V
AF24-SR US
AFR24-SR US
1
Line
Volts
1 Common
2 + Hot
3 Y
1
Input, 0 to 10 V
5 U Output 2 to 10V
AF24-SR US
AFR24-SR US
(–)
(+)
●
●
3
5
5
5
®
Page 20
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D20230 / 5 4 3 2 1 -10/01-20M-IL-Subject to change. © Belimo Aircontrols (USA), Inc.
Startup and Checkout
Instructions For AF24-SR US, AFR24-SR US
®
Procedure
Control signal is applied to actuator.
Check power wiring. Correct any
problems. See Note 1.
Turn reversing switch to the correct
position. Make sure the switch is
turned all the way left or right.
Make sure the control signal positive
(+) is connected to Wire No 3 and
control signal negative (-) is connected to wire No. 1. Most control problems are caused by reversing these
two wires. Verify that the reversing
switch is all the way CCW or CW.
Check input signal with a digital volt
meter (DVM). Make sure the input is
within the range of the actuator. For
AF24-SR
US this is 2 to 10 VDC or
4 to 20 mA.
Note: The input signal must be above
the 2 VDC or 4 mA to have the actuator move.
Check damper torque requirement.
Actuator works properly. Test controller by following controller manufacturer's instructions.
Expected Response
Actuator will move to its “Control
Signal” position.
Power supply rating should be
≥
the total power requirement of
the actuator(s). Minimum voltage of 19.2 VAC or 21.6 VDC.
Actuator will move to its “Control
Signal” position.
Drives to “Control Signal” position
Input voltage or current should
be ±1% of what controller's
adjustment or programming indicate.
Torque requirement is ≤ actuator’s minimum torque.
Gives Expected
Response
Go To Step…
Actuator operates
properly
Step 7
Power wiring correct-
ed, actuator begins
to drive
Step 1
Actuator operates
properly.
Step 7
Actuator operates
properly.
Step 7
Controller output
(actuator input) is
correct. Input
Polarity Correct.
Step 6
Defective Actuator.
Replace Actuator -
See Note 2
Does Not Give
Expected Response
Go To Step…
No response at all
Step 2
Operation is
reversed
Step 3
Does not drive
toward "Control
Signal Position"
Step 4
Power wiring
corrected, actuator
still does not drive
Step 4
Does not drive
toward “Control
Signal Position”
Step 4
Step 5
Reprogram, adjust
repair or replace
controller as needed.
Step 1
Recalculate actuator
requirement 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, AFR24-SR US Electrical check-out procedure
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