I20683 - Subject to change.
Torque min. 60 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 crank arm and
several mounting brackets are available for applications where
the actuator cannot be direct coupled to the damper shaft.
Operation
The TNF 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 TNF 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 TNF24-S version is provided with one built in auxiliary
switch. This SPDT switch is provided for safety interfacing or
signaling, for example, for fan start-up. The switching function
is adjustable between 5° and 85°.
For all accessories, see pages 110 and 132.
TNF24 (-S)
On-off, Spring Return Fail-Safe, 24 V
Technical Data TNF24 (-S)
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 5 W; holding: 2.6 W
Transformer sizing 8 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
Electrical protection Auxiliary switches are double insulated
Angle of rotation 95°, adjustable 30 to 95° w/ accessories
Torque 60 in-lb [7 Nm] constant torque
Direction of rotation reversible with CW/CCW mounting.
Position indication visual indicator, 0° to 95° (0° is spring
return position)
Auxiliary switches 1 x SPDT 7A (2.5A) @ 250 VAC,
UL listed
adjustable 5° to 85°
Running time motor: < 75 sec
spring: < 60 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 UL 873 listed, CSA C22.2 No.24 certified
Noise level max. 45 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight 6.6 lbs (3.0 kg.)
(TNF24-S)
(nominal)
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