®
AF Series Spring Return Direct Coupled Actuator
Minimum 133 in-lb torque
●
For damper areas up to 35 sq-ft*
(For lower torque, see NF, LF, or TF series)
Applications
Remove
for 3/4”
to 1.05”
shafts
ZG106 or
ZG 107
bracket
Power supply :
24 VAC/DC
●
●
120 VAC
on-off
●
●
●
●
●
●
●
●
●
(p. 1
2)
(p. 1
2)
●
(p. 1
2)
AF1
20-S
US
●
230 VAC
Control signal:
AF2
4-SR
US (
p. 14
)
AF2
4-PC
US (
p. 16
)
AF2
4-MF
T US
(p. 1
8)
AF2
4-MF
T-S
US (
p. 18
)
AF24
-MFT
95 U
S (p.
20)
●
AF2
30-S
US
●
(p. 1
2)
(p. 1
0)
133 in-lb
Linkage solutions are available when direct coupling is not
possible. (See Mounting Methods Guide and Mechanical
Accessories Documentation page 132)
AF2
30 U
S
Torque:
AF1
20 U
S
AF Series – at a glance
AF2
4-S
US
(p. 1
0)
All AF
Actuators
have BDCM
AF2
4 US
©
Mount directly to 1.05” jackshafts.
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
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.***
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Manual override
●
●
●
●
●
●
●
●
●
●
●
Appliance rated cable, 18 GA
●
●
●
●
●
●
●
●
●
●
●
spring: <20 sec
Brushless DC Motor
External direction of rotation switch
Built-in auxiliary switch 2 SPDT
Installation instructions ......(p. 22–27)
Electrical operations ..........(p. 28)
●
●
General wiring ..............(p. 29)
●
Start-up and checkout (p. 30)
*Based on 4 in-lb/ft2 damper torque loading. Parallel blade. No edge seals. **Default 2 to 10 VDC. ***Default 150 seconds.
8
●
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
New standard clamp fits standard 1/2”
shafts to 1.05” jackshafts.
AF Series Spring Return Direct Coupled Actuator
A CLOSER LOOK…
LISTED
94D5
TEMP. IND &
REG. EQUIP.
UL

AF
®
● 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 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).
● 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)
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
● Microprocessor-controlled brushless DC motor increases
actuator life span 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.
©
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.
9
®
AF24 (-S) US
On-off, spring return failsafe, 24 V
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.
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 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 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 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
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°.
Dimensions
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.)
10
[All numbers in brackets are in millimeters.]
0.65" [16.5]
K4-2 US (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
0.19" [5]
0.39" [10]
K4-1 US (optional)
Agency listings
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
AF24 (-S) US
Power supply
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
0.35" [9]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.97"
[50]
D001
Technical Data
1.93"
[49]
Torque min. 133 in-lb, for control of air dampers
The AF series provide 95° of rotation and are provided with a
graduated position indicator showing 0° to 95°. The AF has a
unique manual positioning mechanism which allows the setting of any damper position within its 95° of rotation. The AF
series actuators are shipped at +5° (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. The actuators will now try to
close against the 0° position during its normal control operations. The manual override can also be released physically by
the use of a crank supplied with the actuator.
2.24"
[57]

3.10" [78]
UL
3.86" [98]
LISTED
94D5
TEMP. IND &
REG. EQUIP.
3.15" [80]
©
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.
AF24 (-S) US,
®
AF24 (-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. 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. 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.
W002
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-06
8mm and 10 mm wrench
ZG-HTR Thermostat/Heater Kit
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
replacement 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 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 housing
ZS-300
NEMA 4X housing
24 VAC Transformer
1
1 Common
Line
Volts
6
Note: When using AF24 US and AF24-S US actuators,
only use accessories listed on this page.
S1
S2
NC
S3
NO
5°
4
S4
NC
S5
S6
NO
25° to 85°
AF24-S US
2
Wiring diagrams
1
W001
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
3
2 + Hot
24 VAC Transformer
Line
Volts
1 Common
2 + Hot
AF24 US
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption must be observed.
3
Actuator may also be powered by 24 VDC.
3
4
2
1
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption must be observed.
3
Actuator may also be powered by 24 VDC.
On-off wiring for AF24 US
1
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°.
Meets UL and CSA requirements without the need of an
6 electrical ground connection.
On-off wiring for AF24-S US
11
AF
On-off, spring return failsafe, 24 V
®
AF120 (-S) US, AF230 (-S) US
On-off, spring return failsafe, 120 or 230 VAC
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.
UL

The AF series provide 95° of rotation and are provided with a
graduated position indicator showing 0° to 95°. The AF has a
unique manual positioning mechanism which allows the setting of any damper position within its 95° of rotation. The AF
series actuators are shipped at +5° (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. The actuators will now try to
close against the 0° position during its normal control operations. The manual override can also be released physically by
the use of a crank supplied with the actuator.
Technical Data
AF120 (-S) US
AF230 (-S) US
Power supply
120 VAC ± 10%
50/60 Hz
230 VAC ±14%
50/60 Hz
Power consumption
running: 6 W
holding: 2.3 W
6.5 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 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
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 non-condensing
Ambient temperature
-22°F to +122°F [-30°C to +50°C]
1/2" Centered
(Default)
Storage temperature
-40°F to +176°F [-40°C to +80°C]
3/4" Centered
(Field Selectable)
Housing
NEMA type 2 / IP54
1.05" Centered
(Field Selectable)
Housing material
zinc coated steel
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.
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
LISTED
94D5
TEMP. IND &
REG. EQUIP.
The AF120/230-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°.
Dimensions
[All numbers in brackets are in millimeters.]
0.65" [16.5]
Servicing
maintenance free
Quality standard
ISO 9001
Weight
6.9 lbs (3.1 kg.)
12
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
3.10" [78]
2.24"
[57]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.97"
[50]
D001
max. 45 dB (A)
0.35" [9]
1.93"
[49]
Noise level
0.39" [10]
K4-1 US (optional)
3.86" [98]
UL 873 listed, CSA C22.2 No. 24 certified
0.19" [5]
3.15" [80]
Agency listings
K4-2 US (supplied)
AF120 (-S) US, AF230 (-S) US
®
AF120 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. 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. 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.
W004
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-06
8mm and 10 mm wrench
ZG-HTR Thermostat/Heater Kit
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 replacement 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 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 housing
ZS-300
NEMA 4X housing
120 VAC
230 VAC
1
L1 N
1 Neutral
L2 H
2 Hot
3
6
Note: When using AF120/230 US and AF120/230-S US
actuators, only use accessories listed on this page.
S1
NC
S3
5°
NO
4
S4
Wiring diagrams
NC
S5
W003
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
S2
120 VAC
230 VAC
S6
L1 N
1 Neutral
L2 H
2 Hot
1
NO
25° to 85°
AF120 US
AF230 US
3
2
4
AF120 US
AF230 US
2
1
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption must be observed.
3
No ground connection is required.
4
Meets UL and CSA requirements without the need of an
electrical ground connection.
On-off wiring for AF120 US and AF230 US
1
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption must be observed.
3
No ground connection is required.
4
6
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°.
Meets UL and CSA requirements without the need of an
electrical ground connection.
On-off wiring for AF120-S US and AF230-S US
13
AF
On-off, spring return failsafe, 120 or 230 VAC
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
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.
©
UL

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.
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 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°
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, 0° to 95° (0° 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 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 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.)
14
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
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
Transformer sizing
holding: 2 W
[All numbers in brackets are in millimeters.]
0.65" [16.5]
K4-2 US (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
0.19" [5]
0.39" [10]
K4-1 US (optional)
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
0.35" [9]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.97"
[50]
D001
running: 6 W ;
1.93"
[49]
Power consumption
2.24"
[57]
24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
3.10" [78]
AF24-SR US
Power supply
3.86" [98]
Technical Data
The AF series provides 95° of rotation and is provided with a
graduated position indicator showing 0 to 95°. The AF has a
unique manual positioning mechanism which allows the setting of any damper position within its 95° of rotation. The
actuator is shipped at +5° 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.
3.15" [80]
LISTED
94D5
TEMP. IND &
REG. EQUIP.
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.
AF24-SR US
®
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-06
8mm and 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 4 to 20 mA control signal
ZG-HTR Thermostat/Heater Kit
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 replacement 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 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 housing
ZS-300
NEMA 4X housing
AF24-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.
Wiring diagrams
24 VAC Transformer
Line
Volts
W197
1
W011
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
Note: When using AF24-SR US actuators, only use
accessories listed on this page.
1
24 VAC Transformer
1 Common
2 + Hot
3
1 Common
Line
Volts
3 Y Input, 0 to 10V
Control Signal (–)
2 to 10 VDC (+)
(–)
4 to 20 mA
Control Signal (+)
5 U Output 2 to 10V
Ω
500Ω
3
2 + Hot
3 Y Input, 0 to 10V
4
AF24-SR US
2 to 10 VDC
2
(–)
Feedback Signal (+)
1
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption and input impedance must be observed.
3 Actuator may also be powered by 24 VDC.
5
5 U Output 2 to 10V
AF24-SR US
2
1
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption and input impedance must be observed.
3 Actuator may also be powered by 24 VDC.
4
5
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
15
AF
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
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
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.
©
UL

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.
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 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°
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, 0° to 95° (0° 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 non-condensing
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 in millimeters.]
0.65" [16.5]
K4-2 US (supplied)
1/2" Centered
(Default)
Ambient temperature -22°F to +122°F [-30°C to +50°C]
3/4" Centered
(Field Selectable)
Storage temperature -40°F to +176°F [-40°C to +80°C]
1.05" Centered
(Field Selectable)
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.)
16
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
Transformer sizing
holding: 2.5 W
0.19" [5]
0.39" [10]
K4-1 US (optional)
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
0.35" [9]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.97"
[50]
D001
running: 6 W ;
1.93"
[49]
Power consumption
2.24"
[57]
24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
3.10" [78]
AF24-PC US
Power supply
3.86" [98]
Technical Data
The AF series provides 95° of rotation and is provided with a
graduated position indicator showing 0° to 95°. 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 at +5° (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.
3.15" [80]
LISTED
94D5
TEMP. IND &
REG. EQUIP.
The actuator operates in response to a 0-10 V phasecut control input from an electronic controller or positioner. A 2 to 10
VDC feedback signal is provided for position indication or
master-slave applications.
AF24-PC US
®
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-06
8mm and 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 4 to 20 mA control signal
ZG-HTR Thermostat/Heater Kit
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 replacement 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 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 housing
ZS-300
NEMA 4X housing
AF24-PC 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 0 to 20 V
phasecut control output 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.
Wiring diagrams
W184
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
Note: When using AF24-PC US actuators, only use
accessories listed on this page.
1
24 VAC Transformer
Line
Volts
1 Common
2 + Hot
3
3 Y Input, 0 to 10V Phasecut
Control Signal (–)
0 to 20V Phasecut (+)
5 U Output 2 to 10V
AF24-PC US
2
1
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel. Power consumption and input impedance must be observed.
3 Actuator may also be powered by 24 VDC.
0 to 20 V phasecut control of AF24-PC US
17
AF
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
AF24-MFT (-S) US
®
Proportional damper actuator, spring return failsafe, Multi-Function Technology®
• Torque min. 133 in-lb
• Control 2 to 10 VDC (DEFAULT)
• Feedback 2 to 10 VDC (DEFAULT)
Application
For proportional modulation of dampers and control valves in
HVAC systems. The AF24-MFT US provides mechanical spring
return operation for reliable fail-safe application.
less than 45 dB (A)
Agency listings
UL 873 listed, CE, CSA C22.2 No. 24 certified
Quality standard
ISO 9001
Servicing
maintenance free
Weight
6.0 lbs. (2.7 kg.)
* Variable when configured with MFT options
18
The actuator 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
position. The ASIC monitors and controls the brushless DC
motor’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 for
mechanical feedback potentiometers using DRS. The actuator
may be stalled anywhere in its normal rotation without the need of
mechanical end switches.
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
The AF24-MFT US is mounted directly to control shafts up to
1.05" diameter by means of its universal clamp and anti-rotation
bracket. A crankarm and several mounting brackets are available
for damper applications where the actuator cannot be direct coupled to the damper shaft. The spring return system provides minimum specified torque to the application during a power interruption. The AF24-MFT US actuator is shipped at +5° (5° from full
fail-safe) to provide automatic compression against damper gaskets for tight shut-off.
Dimensions [All numbers in brackets are in millimeters.]
0.65" [16.5]
K4-2 US (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
0.19" [5]
0.39" [10]
K4-1 US (optional)
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
0.35" [9]
2.64"
[67]
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.97"
[50]
D001
Noise level
Operation
The AF24-MFT US actuator provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The
actuator will synchronize the 0° mechanical stop or the physical
damper or valve mechanical stop and use this point for its zero
position during normal control operations. A unique manual override allows the setting of any actuator position within its 95° of
rotation with no power applied.This mechanism can be released
physically by the use of a crank supplied with the actuator. When
power is applied the manual override is released and the actuator
drives toward the fail-safe position.
1.93"
[49]
AF24-MFT (-S) US
24 VAC, ± 20%, 50/60 Hz
24 VDC, ±10%
Power consumption
2.5 W holding
6 W running
Transformer sizing
10 VA (Class 2 power source)
Electrical
3 ft, 18 GA, appliance cable,
connection
1/2” conduit connector
Overload protection electronic throughout 0 to 95° rotation
Operating range Y* 2 to 10 VDC
4 to 20 mA (w/500 Ω, 1/4 W resistor) ZG-R01
Input 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 max
Torque
min 133 in-lb (15 Nm)
Direction of rotation* spring: reversible with cw/ccw mounting
motor: reversible with built-in switch
Mech. angle of rotation* 95°, adjustable 35° to 95° w/ZDB-AF2
Running time motor* 150 seconds constant
Running time spring <20 sec spring return fail safe position
Angle 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, IP54
Housing material
zinc coated metal
2.24"
[57]
Technical Data
Power supply
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.
3.10" [78]

3.86" [98]
UL
3.15" [80]
AF24-MFT US
LISTED
94D5
TEMP. IND &
REG. EQUIP.
Default/Configuration
Default 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.
AF24-MFT (-S) US
®
Proportional damper actuator, spring return failsafe, Multi-Function Technology®
1
Line
Volts
Blk (1) Common
Red (2) + Hot
Red (2) + Hot
Ω
Control Signal
4 to 20 mA
3
2
Control Signal (–)
2 to 10 VDC (+)
Blk (1) Common
3
3
AF
24 VAC Transformer
24 VAC Transformer
1
Line
Volts
W013
Standard Wiring
W012
Standard Wiring
500Ω
1/4 watt
3
2
(–)
(+)
Wht (3) Y1 Input, 2 to 10V
Wht (3) Y1 Input, 2 to 10V
4
Wht (5) U Output, 2 to 10V
2 to 10 VDC Feedback Signal
Wht (5) U Output, 2 to 10V
CCW(L) CW(R)
CCW(L) CW(R)
Override to zero position
24 VAC Transformer
Override to zero position
1
Line
Volts
24 VAC Transformer
1
Line
Volts
Blk (1) Common
Red (2) + Hot
500Ω
Ω 1/4
watt
3
Red (2) + Hot
Control Signal (–)
4 to 20 mA (+)
3
A 2
Control Signal (–)
2 to 10 VDC (+)
A Open = 0 V Position
A Closed = Normal Operation
Blk (1) Common
Wht (3) Y1 Input, 2 to 10V
A
4
Wht (3) Y1 Input, 2 to 10V
2
A Open = 4 mA Position
A Closed = Normal Operation
Override to 20 mA position
24 VAC Transformer
Override to 10 V position
1
Line
Volts
24 VAC Transformer
1
Blk (1) Common
Line
Volts
3
B
Ω
B
500Ω
C
Control Signal (–)
4 to 20 mA
(+)
2
Wht (3) Y1 Input, 2 to 10V
4
Wht (3) Y1 Input, 2 to 10V
C
1/4 watt
B Closed = 20 mA Position
C Closed = Normal Operation
B Closed = 10 V Position
C Closed = Normal Operation
2
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.
4 to 20 mA Control Signal
S1
Override control to min, mid, max, positions
NC
S2
24 VAC Transformer
S3
1
Line
Volts
3
Ω
A
B
Control Signal (–)
2-10 VDC or (+)
4 to 20 mA
500Ω
4
Blk (1) Common
S4
Red (2) + Hot
S5
Wht (3) Y1 Input, 2 to 10V
0%
Mid*
50%
Max*
Normal**
25° to 85°
Auxiliary Switch AF24-MFT-S US
Notes
a
b
c
100%
Control mode acc. to Y
* Default selectable 0-100%. See Configuration Data Sheet.
** Customizable. See Configuration Data Sheet.
2 to 10 VDC Control Signal
5
6
NO
C
5°
NC
1
Functions
NO
S6
1/4 watt
Min*
W014
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
3
Red (2) + Hot
Control Signal (–)
2 to 10 VDC
(+)
Blk (1) Common
Red (2) + Hot
Provide overload protection and disconnect as required.
2
Actuators may be connected in parallel if not mechanically mounted
to the same shaft. Power consumption and input impedance must
be observed.
3
Actuator may also be powered by 24 VDC.
4
ZG-R01 may be used.
5
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°.
6
Meets UL and CSA requirements without the need of an electrical
ground connection.
19
AF24-MFT95 US
®
Proportional damper actuator, spring return failsafe, 24 V for use with
Honeywell® electronic Series 90, or a 0 to 135Ω input
• Torque min. 133 in-lb
• Control fixed, 0 to 135Ω input, or Honeywell series 90 (fixed)
• Feedback 2 to 10 VDC (DEFAULT)
Application
For proportional modulation of dampers and control valves in
HVAC systems. The AF24-MFT95 US provides mechanical
spring return operation for reliable fail-safe application.
AF24-MFT95 US
LISTED
94D5
TEMP. IND &
REG. EQUIP.
UL

Default/Configuration
Default 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 tool
or PC-software. 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.
running: 6 W ;
Transformer sizing
10 VA (class 2 power source)
holding: 2 W
Electrical connection 3 ft, 18 GA appliance cable
1/2” conduit connector
Overload protection
electronic throughout 0 to 95° rotation
Operating range WRB 0 to 135Ω Honeywell electronic series
(Not selectable via MFT)
90, or a 0 to 135 Ω input
Feedback output U*
2 to 10 VDC, 0.5 mA max
Mech. angle of rotation* 95°, adjustable 35° to 95° w/ZDB-AF2
Torque
133 in-lb [15 Nm] constant
Direction of rotation*
Position indication
Manual override
Running time motor*
Running time spring
Angle of Rotation
Adaptation*
Override control*
Humidity
spring: reversible with cw/ccw mounting
motor: reversible with built-in switch
visual indicator, 0° to 95° (0° is spring
return position)
3mm hex crank (shipped w/actuator)
150 seconds constant
<20 sec spring return fail safe position
Off (Default)
Min. (Min Position) = 0%
- ZS (Mid. Position) = 50%
- Max. (Max. Position) = 100%
5 to 95% RH non-condensing
Ambient temperature -22°F to +122°F [-30°C to +50°C]
The actuator 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
position. The ASIC monitors and controls the brushless DC
motor’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 for
mechanical feedback potentiometers using DRS. The actuator
may be stalled anywhere in its normal rotation without the need of
mechanical end switches.
The AF24-MFT95 US is mounted directly to control shafts up to
1.05" diameter by means of its universal clamp and anti-rotation
bracket. A crankarm and several mounting brackets are available
for damper applications where the actuator cannot be direct coupled to the damper shaft. The spring return system provides minimum specified torque to the application during a power interruption. The AF24-MFT95 US actuator is shipped at +5° (5° from full
fail-safe) to provide automatic compression against damper gaskets for tight shut-off.
Dimensions [All numbers in brackets are in millimeters.]
0.65" [16.5]
K4-2 US (supplied)
1/2" Centered
(Default)
Storage temperature -40°F to +176°F [-40°C to +80°C]
3/4" Centered
(Field Selectable)
Housing
1.05" Centered
(Field Selectable)
NEMA type 2 / IP54
Housing material
zinc coated metal
Agency listings
UL 873 listed, CE, CSA C22.2
No. 24 certified
0.19" [5]
0.39" [10]
maintenance free
Quality standard
ISO 9001
Weight
6.0 lbs (2.7 kg.)
* Variable when configured with MFT options
20
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
0.35" [9]
3.86" [98]
max. 45 dB (A)
Servicing
K4-1 US (optional)
2.64"
[67]
3.15" [80]
Noise level
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
Power consumption
10.59" [269]
5.85" [148.5]
0.26" [6.5]
1.97"
[50]
D001
24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
1.93"
[49]
Power supply
Operation
The AF24-MFT95 US actuator provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The
actuator will synchronize the 0° mechanical stop or the physical
damper or valve mechanical stop and use this point for its zero
position during normal control operations. A unique manual override allows the setting of any actuator position within its 95° of
rotation with no power applied.This mechanism can be released
physically by the use of a crank supplied with the actuator. When
power is applied the manual override is released and the actuator
drives toward the fail-safe position.
2.24"
[57]
AF24-MFT95 US
3.10" [78]
Technical Data
AF24-MFT95 US
®
Proportional damper actuator, spring return failsafe, 24 V for use with
Honeywell® electronic Series 90, or a 0 to 135Ω input
24 VAC Transformer
1
Damper Open
1 Common, Blk
Line
Volts
Damper Closed
2 + Hot, Red
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
24 VAC Transformer
Shunting
Resistor
1 Common, Blk
Line
Volts
2 + Hot, Red
A
135Ω
W
3 W, Wht
R
4 R, Wht
B
5 B, Wht
4
3
B
1
4 R, Wht
Line
Volts
5 B, Wht
1 Common, Blk
2 + Hot, Red
Line
Volts
B
2
3
4 R, Wht
B
1
5 B, Wht
2
6 ‘U5’ Output 2-10 VDC
Controller
3
AF24-MFT95 US
1
Provide overload protection and disconnect as required.
2
Actuators and controller must have separate transformers.
3
Consult controller instruction data for more detailed
installation information.
4
To reverse control rotation, use the reversing switch.
W
W
R
B
3 W, Wht
4 R, Wht
5 B, Wht
6 ‘U5’ Output 2-10 VDC
AF24-MFT95 US
W
Shunting
Resistor
3
B
Occupied
Contact
3 W, Wht
No. of
actuators Resistance
2
140Ω
3
71.5Ω
4
47.5Ω
5
37.5Ω
6
28Ω
Resistor Kit No. ZG-R03
3 W, Wht
R
R
Y
4
A
W
H205
Changeover
Controller
B
5
1 Common, Blk
Line
Volts
5
2 + Hot, Red
AF24-MFT95 US
24 VAC Transformer
3
2
2
6 ‘U5’ Output 2-10 VDC
1
2 + Hot, Red
AF24-MFT95 US
4
3 W, Wht
1 Common, Blk
Line
Volts
6 ‘U5’ Output 2-10 VDC
Series 90
Controller
Q209A
Minimum Position
Potentiometer
3
5
2
24 VAC
Transformer
1
4
5
4 R, Wht
R
4
5 B, Wht
R
Honeywell T675A
Morning Warmup
W
W973, W7100
Controller
6 ‘U5’ Output 2-10 VDC
To other
actuators
AF24-MFT95 US
1
1 Common, Blk
Line
Volts
Provide overload protection and disconnect as required.
3
2 + Hot, Red
Actuators and controller must have separate transformers.
5
Consult controller instruction data for more detailed
installation information.
3 W, Wht
No. of
actuators
2
3
4
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.
4 R, Wht
Resistance
1300Ω
910Ω
768Ω
5 B, Wht
6 ‘U5’ Output 2-10 VDC
To other
actuators
Resistor Kit No. ZG-R06
AF24-MFT95 US
Used with the W973 and W7100 controllers.
24 VAC Transformer
1 Common, Blk
Line
Volts
2 + Hot, Red
W
Series 90
Controller
1
W
B
R
4 R, Wht
B
5 B, Wht
Series 90 low limit control
135Ω for 0 to 50% control
280Ω for 0 to 100% control
S963A
Minimum Position
Potentiometer
B
Shunting
Resistor
W
3 W, Wht
5 B, Wht
W
Provide overload protection and disconnect as required.
2
Actuators and controller must have separate transformers.
3
Consult controller instruction data for more detailed
installation information.
4
To reverse control rotation, use the reversing switch.
2 + Hot, Red
W
R
R
R
B
W
3 W, Wht
W
4 R, Wht
3
5
5 B, Wht
B
W973, W7100
T775
2
6 ‘U5’ Output 2-10 VDC
Honeywell
T675A Morning
Warmup
AF24-MFT95 US
6 ‘U5’ Output 2-10 VDC
3
1
Shunting
Resistor
4 R, Wht
R
AF24-MFT95 US
B
1 Common, Blk
2
5
R
Honeywell Q209A
Minimum Position
Potentiometer
Line
Volts
4
2 + Hot, Red
Series 90
Controller
6 ‘U5’ Output 2-10 VDC
1
24 VAC
Transformer
3
1 Common, Blk
Line
Volts
3 W, Wht
R
24 VAC
Transformer
3
4
2
4
AF24-MFT95 US
B
R
W
H205 Changeover Controller
Occupied
Contact
1
AF24-MFT95 US used with a Series 90 controller and a Series 90 low limit control
1 Common, Blk
Line
Volts
1 Common, Blk
Line
Volts
1
5
2
5
3 W, Wht
2
1
24 VAC Transformer
2 + Hot, Red
6 ‘U5’ Output 2-10 VDC
To other
actuators
To other
actuators
AF24-MFT95 US
AF24-MFT95 US
4 R, Wht
R
B
5 B, Wht
3 W, Wht
W
Series 90
Controller
4 R, Wht
4 R, Wht
6 ‘U5’ Output 2-10 VDC
3
4
2
3 W, Wht
5 B, Wht
1 Common, Blk
Line
Volts
3
2 + Hot, Red
3
2 + Hot, Red
W017
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
W016
1
W019
Wiring multiple actuators to a Series 90
controller.
Override of AF24-MFT95 US
R
W
B
5 B, Wht
1
6 ‘U5’ Output 2-10 VDC
Series 90 high limit control - 280Ω
2
AF24-MFT95 US
3
1
Provide overload protection and disconnect as required.
2
Actuators and controller must have separate transformers.
3
Consult controller instruction data for more detailed
installation information.
4
To reverse control rotation, use the reversing switch.
AF24-MFT95 US used with a Series 90 controller and a Series 90 high limit control
4
5
Provide overload protection and disconnect as required.
1
Actuators and controller must have separate transformers.
2
Consult controller instruction data for more detailed
installation information.
3
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.
Wiring multiple actuators to a Series 90
controller using a minimum position
potentiometer.
4
5
Provide overload protection and disconnect as required.
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.
Typical wiring diagrams for multiple
actuators used with the W973, W7100
and T775 controllers.
21
AF
Damper Position
W020
Switch B
W018
Switch A
W015
Proportional Potentiometric Control
®
Installation Instructions
Quick-Mount Visual Instructions for Mechanical Installation
1/2"
min. 3
0
[9 ]
/4"
min. 3
[20]
IND-AF2 Position Indicator
(optional)
Remove
for 3/4”
to 1.05”
shafts
Dimensions
(All numbers in brackets are in millimeters.)
QUICK-MOUNT VISUAL INSTRUCTIONS
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.
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.
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.
2. If the universal clamp is not on the correct side of the actuator, move it to the correct side.
NOTE: Read the “Standard Mounting” instructions, on the next
page, for more detailed information.
22
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
IND-AF2 Position Indicator
(optional)
®
Installation Instructions
Mechanical Installation
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.
Torque Loading
Opposed blade, without edge seals,
for non-tight close-off applications
3 in-lb/sq. ft.
Parallel blade, without edge seals,
for non-tight close-off applications
4 in-lb/sq. ft.
Opposed blade, with edge seals,
for tight close-off applications
5 in-lb/sq. ft.
Parallel blade, with edge seals,
for tight close-off applications
7 in-lb/sq. ft.
70
Torque Loading
Chart
60
Damper Area (sq. ft.)
Damper Type
AF
Determining Torque Loading and Actuator Sizing
50
40
30
20
10
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.
0
2
3
4
5
6
7
8
9
10
Torque Loading (in-lb/ sq. ft.)
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 accessory or the actuator may be
mounted in its short shaft configuration.
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
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°.
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 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 at +5° (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.
Standard Mounting
Note:The AF…series actuator is shipped with the manual
override adjusted for a +5° position at the universal clamp
(not at full fail-safe, 0° ). 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
23
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.
30
30
20
10
0
20
20
30
10
0
-5
20
10
10
0
0
CCW
CCW
40
30
30
20
20
10
0
10
0
-5
CW CW
Correct pointer mounting
position
actuator
is at
Correct ifclamp
mounting
full
fail-safe.
position
if actuator is at
full fail-safe.
CCW
CCW
40
40
30
30
20
20
10
-0
-5
10
0
CW
CW
Correct pointer mounting
position when actuator is
at 5° preload.
30
30
20
20
10
Lock the clamp to the actuator using the retaining clip.
Verify that the damper is still in its full fail-safe position.
Slide the actuator over the shaft.
Position the actuator in the desired location.
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.
-5
-5
0
10
0
CCW
CW
40
40
Correct pointer mounting
position if actuator is at
full fail-safe.
30
20
10
30
20
10
-
0
CCW
0
CW
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 wiring guide for wiring details.
AF actuators which may be
used on one shaft:
Fig. A Universal Clamp and IND-AF2 Pointer (optional)
positions indicating fail-safe and pre-load settings
Model
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.
24
Max
Quantity
Per Shaft
AF24 (-S) US
AF120 (-S) US
AF230 (-S) US
4
AF24-SR US
4
AF24-MFT (-S) US
4
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.
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
30
Correct clamp mounting
Correctifclamp
mounting
position
actuator
is at
position
when actuator is
full
fail-safe.
shipped from factory
(with 5° preload)
4.
5.
6.
7.
8.
Installation Instructions
®
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.
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.
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.
0
10
100
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.
Special Wiring and Additional Information: See wiring guide
80
80
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.
90
90
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.
70
70
60
60
50
50
40
40
30
30
20
20
10
10
0
0
CCW
CW
Fig. D
60
60
50
Secure angle-ofrotation limiter
Screw secured at
these cross hairs
30
30
Screw
40
30
20
30
20
40
40
20
20
40
10
10
0
0
CCW
CW
Fig. E
Philips screwdriver
Angle of rotation
is now set at 40°.
40
20
30
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
50
Fig. C ZDB-AF2 Securing the Angle of Rotation Limiter
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.
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.
25
AF
Mechanical Installation
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.
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.
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.
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.
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.
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.
AF…series
Rotate with
crank handle
Factory setting 85°
30 40
50
60
70
80
30 40
50
60
Cra 70
nk
Han
80
d
25…85°
25…85°
le
50
60
70
80
25…85°
Fig. F
Actuator
after locking
Switch operates
30 40
30 40
50
60
Cra 70
nk
Han
80
d
25…85°
le
50
60
70
80
25…85°
Fig. G
26
60° set
30 40
Switch does
not operate
30 40
50
60
70
80
25…85°
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
Winding the
damper actuator
- insert crank handle
- turn handle in direction of arrow
Installation Instructions
®
AF
Non-direct mounting methods
KH-AF crankarm including retaining ring. Caution: the
retaining clip supplied with the clamp is not used to mount the
KH-AF crankarm.
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-1 For jackshafts up to 1.05”
KH-AFV V-bolt kit for KH-AF(-1) crankarm
(All numbers in brackets are in millimeters.)
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
Dimensions
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
KH-AF Non-direct mounting with ZG-108 mounting bracket
Multiple dampers direct coupled to one actuator with
linkage to operate the other damper.
27
Installation Instructions
®
Electrical Operation
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.
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.
Control Accuracy and Stability
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 or
decreasing control signal with a 50 mV resolution. If the signal changes in the opposite direction, the actuator will not respond
until the control signal changes by 50 mV. This allows these actuators to track even the slightest deviation very accurately, yet
allowing the actuator to “wait” for a much larger change in control signal due to control signal instability.
AF Actuator responds to a 50 mV signal
when not changing direction from stop
Satisfied
Control Position
AF Actuator responds to a 50 mV signal
when reversing direction from stop position.
Minimum Reversed
Control Deadband
Prior to Normal Control
50 mV
50 mV
Satisfied
Control Position
Minimum
Control Resolution
The AF24-MFT US control accuracy and stability can be found in the MFT specifications, page 187.
28
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
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.
Installation Instructions
®
General Wiring
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.
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:
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.
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
Transformer(s)
The AF24 . . actuators require a 24 VAC class 2 transformer
and draws a maximum of 10 VA per actuator. The actuator
enclosure cannot be opened in the field, there are no parts or
components 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 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 transformer 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 Size
12 Ga
14 Ga
16 Ga
Max. Feet.
900 Ft.
550 Ft.
350 Ft.
Wire Size
18 Ga
20 Ga
22 Ga
Max. Feet
225 Ft.
125 Ft.
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, and AF24-MFT US
When power is initially applied, the actuator will first release its
manual preload position (This assumes a manual position has
been set). 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.
The AF24-MFT US will also return to its position prior to the
20-second-or-less power loss. For power failures greater than
20 seconds, the actuator would naturally return to its full failsafe position prior to the microprocessor losing its memory.
The actuator will also re-initialize if the manual position mechanism is used.
29
AF
General Wiring Instructions
Startup and Checkout
®
Instructions For AF24-SR US and AF24-MFT US + P-100…
Step
Expected Response
Gives Expected
Response
Go To Step…
Does Not Give
Expected Response
Go To Step…
1.
Control signal is applied to actuator.
Actuator will move to its “Control
Signal” position.
Actuator operates
properly
Step 7
No response at all
Step 2
Operation is
reversed
Step 3
Does not drive
toward "Control
Signal Position"
Step 4
2.
Check power wiring. Correct any
problems. See Note 1.
Power supply rating should be ≥
the total power requirement of
the actuator(s). Minimum voltage of 19.2 VAC or 21.6 VDC.
Power wiring corrected, actuator begins
to drive
Step 1
Power wiring
corrected, actuator
still does not drive
Step 4
3.
Turn reversing switch to the correct
position. Make sure the switch is
turned all the way left or right.
Actuator will move to its “Control
Signal” position.
Actuator operates
properly.
Step 7
Does not drive
toward “Control
Signal Position”
Step 4
4.
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.
Drives to “Control Signal” position
Actuator operates
properly.
Step 7
Step 5
5.
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.
Input voltage or current should
be ±1% of what controller's
adjustment or programming indicate.
Controller output
(actuator input) is
correct. Input
Polarity Correct.
Step 6
Reprogram, adjust
repair or replace
controller as needed.
Step 1
7.
Check damper torque requirement.
Torque requirement is ≤ actuator’s minimum torque.
Defective Actuator.
Replace Actuator See Note 2
Recalculate actuator
requirement and
correct installation.
8.
Actuator works properly. Test controller by following controller manufacturer's instructions.
Note 1
Note 2
30
Procedure
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.
If failure occurs within 5 years from original installation date, notify Belimo and give details of the application.
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
AF24-SR US and AF24-MFT US + P-100… Electrical check-out procedure
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