Belimo FSAF24 - Manual (Page 5)

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
175
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
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
2.1 V 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 fi tting into the actuator’s bushing. Jacket the actuator’s input and
output wiring with suitable fl exible conduit. Properly terminate the conduit in a
suitable junction box.
Dimensions (Inches [mm])
1.97"
3.15" [80] 3.86" [98]
3.10" [78]
2.24" [57]
[50]
1.93" [49]
2.64"
[67]
0.26" [6.5]
5.85" [148.5]
10.59" [269]
0.35" [9]
0.39" [10]
0.65" [16.5]
0.19" [5]
Standard:
1/2" to 1.05"
Optional*
3/8" to 3/4"
*with K4 US
clamp
D
001(old)
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 k Ω (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)
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°
M40024 - 05/10 - Subject to change.
© Belimo
Aircontrols (USA),
Inc.