NFB24

$276.30

Each

Damper Actuator, 90 in-lb [10 Nm], Spring return, AC/DC 24 V, On/Off

Fail-safe position
Weight 4.9 lbs
Torque

90 in-lb [10 Nm]
Brand

Belimo
Voltage

AC/DC 24 V
Actuator Type

Spring return
Control type

On/Off
Torque motor
90 in-lb [10 Nm]
Power consumption in operation
6 W
Power consumption in rest position
2.5 W
Transformer sizing
8.5 VA (class 2 power source)
Ambient humidity
5...95% r.H. non-condensing
Housing material
zinc coated metal and plastic casing
Electrical Connection
18 GA appliance cable, 3 ft [1 m], with 1/2" conduit connector
Manual override
5 mm hex crank (3/16" Allen), supplied
Angle of rotation
95°, adjustable with mechanical end stop, 35...95°
Position indication
visual indicator, 0° to 95° (0° is full spring return position)
Ambient temperature
-22...122°F [-30...50°C]
Non-operating temperature
-40...176°F [-40...80°C]
Control
On/Off
direction of rotation motor
reversible with CW/CCW mounting
Overload Protection
electronic throughout 0° to 95° rotation
Degree of Protection
IP54, NEMA 2, UL Enclosure Type 2
Nominal voltage
AC/DC 24 V
Nominal voltage frequency
50/60 Hz
Power Supply
24 VAC, ±20%, 50/60 Hz, 24 VDC, -10% / +20%
Power supply tolerance AC
±20%
Power supply tolerance DC
-10% / +20%
Agency Listing
cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC
Emergency control function
Spring Return
Product family
Damper Actuator
direction of rotation spring-return
reversible with cw/ccw mounting
Noise level, motor
≤50 dB (A) 
Shaft Diameter
1/2" to 1.05" round, centers on 1/2" and 3/4" with insert, 1.05" without insert
Electrical accessories
P475|P475-1|PS-100|TF-CC US|ZG-X40
Family Series
NF Series
Noise Level (Fail-Safe)
<62 dB (A) 
Running time (Fail-Safe)
20 seconds
Running Time (Motor)
<75 sec
Running Time (Fail-Safe)
<20 sec @ -4...122°F [-20...50°C], <60 sec @ -22°F [-30°C]
Fail-Safe function
Spring return
Control type
On/Off
Connection
cable
Degree of protection IEC/EN
IP54
Degree of protection NEMA/UL
NEMA 2
Enclosure
UL Enclosure Type 2
CAD ThomasNetLink
NFB24
Product Features
Torque min. 90 in-lb, for control of air dampers.
Electrical Protection
actuators are double insulated
VA Rating
8.5
Mechanical accessories
AF-P|AV8-25|IND-AFB|K7-2|KG10A|KG8|KH10|KH12|KH8|KH-AFB|SH10|SH8|TOOL-06|Z-AF|ZG-100|ZG-101|ZG-109|ZG-110|ZG-118|ZG-120|ZG-AFB|ZG-AFB118|ZG-DC1|ZG-DC2|ZG-JSA-1|ZG-JSA-2|ZG-JSA-3|ZS-100|ZS-101|ZS-150|ZS-260|ZS-300|ZS-300-5|ZS-300-C1|ZS-300-C2|ZS-300-C3|Z-SF
Operation
The NF..24 series actuators provide true spring return operation for reliable failsafe 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 NF..24 series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. The NF..24 actuator is shipped at 5° (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off.
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 crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft.
Typical Specification
On/Off spring return damper actuators shall be direct coupled type which require no crank arm 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 counter clockwise fail-safe operation. Actuators shall be protected from overload at all angles of rotation. If required, two SPDT auxiliary switch shall be provided having the capability of one being adjustable. Actuators with auxiliary switches must be constructed to meet the requirements for Double Insulation so an electrical ground is not required to meet agency listings. Actuators shall be cULus listed and have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo.
CP65 Warning
⚠ WARNING: For Belimo Products sold in California, these Products do or may contain chemicals which are known to the State of California to cause cancer and or birth defects or other reproductive harms. For more information see www.p65warnings.ca.gov.

Datasheet Download: Datasheet

Installation instructions Download: Installation instructions

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