800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
20
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 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.
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 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 (Inches [mm])
1.97"
3.15" [80]
3.86" [98]
3.25" [82.7]
2.24"
[57]
[50]
1.93"
[49]
2.64"
[67]
0.26" [6.5]
5.85" [148.5]
10.47" [266]
0.35" [9]
0.39" [10]
0.65" [16.5]
0.19" [5]
K4-2 US (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
K4-1 US (optional)
3/4" to 1.05"
Adjustable
K4 US (optional)
3/8" to 3/4"
Adjustable
D001
AF120(-S) US, AF230(-S) US
On/Off, Spring Return Fail-Safe, 120 or 230 VAC
Technical Data AF120... US, AF230... US
Power supply
AF120(-S) US 120 VAC ± 10% 50/60 Hz
AF230(-S) US 230 VAC ±15% 50/60 Hz
Power consumption
AF120(-S) US running 8 W
holding 3 W
AF230(-S) US running 8.5 W
holding 3 W
Transformer sizing
AF120(-S) US 11 VA
AF230(-S) US 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 US
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
(AF120/230-S)
2 x SPDT 7A (2.5A) @ 250 VAC, UL Approved
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
Agency listings cULus acc. to UL 873 and
CAN/CSA C22.2 No. 24-93
Noise level max. 45 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight 6.9 lbs (3.1 kg)
K20901 - 01/09 - Subject to change. © Belimo Aircontrols (USA), Inc.
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