FSAF24-SR(-S) US

Proportional, Spring Return, 24 V, 2 to 10 VDC or 4 to 20 mA control signal Operation at 250°F for limited time per UL555S testing

Technical Data

 

FSAF24-SR(-S) US

Power supply

 

24 VAC ± 20% 50/60 Hz

 

 

24 VDC ± 10%

Power consumption

running

7 W, 11 VA

 

holding

3 W, 5 VA

Transformer sizing

 

15 VA (class 2 power source)

Electrical connection

 

 

FSAF24-SR

3 ft, 18 GA, 4 color coded leads (24V)

 

 

1/2” conduit connector

FSAF24-SR-S

3 ft, 18 GA appliance cable

 

 

1/2” conduit connector

Overload protection

 

electronic throughout 0 to 95° rotation

Operating range

 

2 to 10 VDC, 4 to 20mA

Input impedance

 

100 kΩ (0.1 mA), 500 Ω

Feedback output U

 

2 to 10 VDC (max. 0.5 mA) for 95°

Angle of rotation

 

mechanically limited to 95°

Torque

 

133 in-lb [15 Nm] constant

Direction of rotation

spring

reversible with cw/ccw mounting

 

 

The control direction switch is not present. Direct

 

 

acting only. 2 VDC=Fail-safe position.

Position indication

 

visual indicator, 0° to 95°

 

 

(0° spring return position)

Torque min. 133 in-lb, for control of air dampers

Application

For proportional modulation of UL555S rated dampers in HVAC. Actuator sizing should be done in accordance with the damper manufacturer’s specifications.

The actuator is mounted directly to a damper shaft or jackshaft up to 1.05” in diameter by means of its universal clamp. A crank arm and mounting brackets are available if the actuator cannot be direct coupled to the jackshaft or damper shaft.

The actuator operates in response to a 2 to 10 VDC, or with the addition of a

500 Ω resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to 10 VDC feedback signal is provided for position indication or master-slave applications. See Application Bulletin for details.

Operation

The FSAF series actuators provide spring return operation. There is no reversing switch on the FSAF24-SR. It is direct acting only. A reverse acting signal is required if it must spring open while 2V signal drives it closed. The torque is asymmetrical giving 180 in-lb drive and 133 in-lb spring.

The FSAF resets after being driven or springing closed to the 0 position. There is a possible hysteresis of 1° every 1000 changes in signal. This can cause a position shift. It is recommended that power or signal be reset once a week.

A manual override winder and locking mechanism is provided. If the manual winder is used when the actuator is powered, the actuator will release and drive closed to reset the 0 degree position.

The actuator may not be mechanically parallelled or “piggybacked.” Each damper section should be controlled by a separate actuator.

The wire 5 feedback can be used to parallel up to five additional actuators. If less than

2.1V or greater than 9.9V is given wire 3, actuator drives all the way to the respective end stop.

The FSAF uses a DC motor which is controlled by a microchip The actuator may be stalled anywhere during its rotation without damage. If power is removed, the damper will spring closed. Interlocks must be provided as necessary for life safety functions and to shut down fan if required.

SAFETY NOTE

Screw a conduit fitting into the actuator’s bushing. Jacket the actuator’s input and output wiring with suitable flexible conduit. Properly terminate the conduit in a suitable junction box.

(USA), Inc.

Manual override

 

 

3mm hex crank (shipped w/actuator)

Running time

 

motor

<75 sec. constant, independent of load

 

 

spring

< 20 seconds

Humidity

 

 

5 to 95% RH non-condensing

Ambient temperature

 

 

 

 

normal duty

-22°F to 122°F [-30°C to 50°C]

 

 

safety duty

3 on/off cycles after 30 minutes at ambient

 

 

 

temperature of 250°F [121°C]

Storage temperature

 

 

-40°F to 176°F [-40°C to 80°C]

Housing

 

 

NEMA type 2 / IP40

Housing material

 

 

zinc coated metal

Agency listings†

 

 

cULus to UL873 and CSA C22.2 No. 24-93

Noise level (max)

 

running

45 db (A)

Servicing

 

 

maintenance free

Quality standard

 

 

ISO 9001, 5 year Belimo warranty

Weight

 

 

6.0 lbs (2.7 kg.)

 

 

 

 

FSAF24-SR-S US

 

 

 

Auxiliary switch

 

 

2 x SPDT 7A resistive, 2.5A inductive at

 

 

 

120/250VAC. UL Approved, double-insulated,

 

 

 

one set at =+10°, one adjustable 30° to 90°

Dimensions (Inches [mm])

 

0.65" [16.5]

 

 

 

 

 

 

 

 

 

Standard:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2" to 1.05"

3.10"[78]

2.24"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Optional*

[57]

 

 

 

 

 

 

 

 

 

 

 

 

3/8" to 3/4"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.19" [5]

 

 

 

 

 

 

 

 

 

 

 

0.39" [10]

 

 

2.64"

 

 

 

 

 

 

0.35" [9]

 

 

 

 

 

[67]

 

 

 

 

 

 

[98]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[80]

 

 

 

 

 

 

 

 

 

 

 

 

 

*with K4 US

3.86"

 

3.15"

 

 

 

 

 

 

 

 

 

 

 

 

 

clamp

 

 

 

 

 

 

 

 

1.97"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[50]

 

 

 

 

 

 

 

 

10.59" [269] 5.85" [148.5]

0.26" [6.5]

D001(old)

1.93"

 

[49]

M40024 - 05/10 - Subject to change. © Belimo Aircontrols

800-543-9038 USA

175

866-805-7089 CANADA

203-791-8396 LATIN AMERICA

Page 5
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321 Studios specifications FSAF24-SR-S US, 175, Technical Data

FSAF24 specifications

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