Technical Data

1403

Power Supply

24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10%

Power consumption in operation 2.5 W

Power consumption in rest

position

1 W

Transformer sizing

5 VA (class 2 power source)

Shaft Diameter

8x8 mm form fit

Electrical Connection

Plenumkabel, 3 ft [1 m], 4 male spade

connectors

Overload Protection

electronic throughout 0...95° rotation

Electrical Protection

actuators are double insulated

Input Impedance

1000 Ω (0.6 W)

Angle of rotation

Max. 95°, adjustable with mechanical stop

Torque motor

35 in-lb [4 Nm]

Direction of motion motor

selectable with switch 0/1

Direction of motion fail-safe

reversible with cw/ccw mounting

Position indication

Mechanical

Running Time (Motor)

90 s

Running time fail-safe

<25 s @ -4...122°F [-20...50°C], <60 s @

-22°F [-30°C]

Ambient humidity

max. 95% r.H., non-condensing

Ambient temperature

-22...122°F [-30...50°C]

Storage temperature

-40...176°F [-40...80°C]

Degree of Protection

IP54, NEMA 2, UL Enclosure Type 2

Housing material

galvanized steel

Agency Listing

cULus acc. To UL 873 and CAN/CSA C22.2

No. 24-93

Noise level, motor

30 dB(A)

Noise level, fail-safe

62 dB(A)

Servicing

maintenance-free

Quality Standard

ISO 9001

Weight

3.2 lb [1.4 kg]

†Rated Impulse Voltage 800V, Type of action 1.AA, Control Pollution Degree 3

Torque min. 35 in-lb, for control of air dampers.

Application

For modulation or On/Off, fail-safe 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 with its 8x8

mm form fit ZG-LFC114 universal mounting kit for retrofit of the economizer

section of the Trane Voyager unit. 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 LF 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 LF series provides 95° of rotation and is provided

with a graduated position indicator showing 0 to 95°. The LFC24-3-R US 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. 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. Power consumption is reduced in holding mode.

Dimensions (Inches[mm])

[

9.974]

LFC24-3-R US Damper Actuator Technical Data Sheet

On/Off, Floating Point, Spring Return, 24 V, Trane Voyager Retrofit

800-543-9038 USA

866-805-7089 CANADA

203-791-8396 LATIN AMERICA / CARIBBEAN