I20683 - Subject to change.
TLF24-3
On-off, Spring Return Fail-Safe, Reversible, Floating Point, 24V
Torque min. 35 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 from 3/8”
up to 1/2” in diameter by means of its universal clamp, 1/2”
shaft centered at delivery. For shafts up to 3/4” use K6-1
accessory. A crank arm and several mounting brackets are
available for applications where the actuator cannot be direct
coupled to the damper shaft.
Control is floating point from a triac or relay, or on-off from an
auxiliary contact from a fan motor contactor, controller, or
manual switch.
Operation
The TLF 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 TLF series provides 95° of rotation and is provided with a
graduated position indicator showing 0° to 95°.
The TLF24-3 uses a brushless DC motor which is controlled by
an Application Specific Integrated Circuit (ASIC) and a micro-
processor. 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 actua-
tor in a stall condition. The actuator may be stalled anywhere in
its normal rotation without the need of mechanical end switches.
Power consumption is reduced in holding mode.
For all accessories, see pages 110 and 132.
Dimensions
[All numbers in brackets are in millimeters.]
Technical Data TLF24-3
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 2.5 W; holding: 1 W
Transformer sizing 5 VA (class 2 power source)
Electrical connection TLF24-3 3 ft, plenum rated cable
Overload protection electronic throughout 0° to 95° rotation
Input impedance 1000 Ω (0.6w) control inputs
Angle of rotation max. 95°, adjust. with mechanical stop
Torque 35 in-lb [4 Nm]
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)
Running time motor: 150 sec constant,
independent of load
spring: < 25 sec
@-4°F to +122°F [-20°C to +50°C]
< 60 sec
@-22°F [-30°C]
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, CE
Noise level max: running < 30 db (A)
spring return 62 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight TLF24-3 3.1 lbs (1.40 kg.)
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