FSAF24-SR (-S) US
70072-00001G
Technical Data
FSAF24-SR (-S) US
Power supply
24 VAC ±20% 50/60 Hz
24 VDC ±10%
Power
consumption
running
7W 11 VA
holding
3W 5 VA
Transformer sizing
15 VA (class 2 power source)
Electrical
connection
motor
3 ft, 18 ga, 4 color coded leads (24V)
½” conduit connectors
auxiliary
switches
3 ft, 18 ga, appliance cable
½” conduit connectors
Overload protection
electronic throughout 0° to 95° rotation
Operating range
2 to 10 VDC, 4 to 20 mA
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]
Direction of rotation
spring return reversible with CW/CCW
mounting. A control direction switch is
not present. Direct acting only.
2 VDC = Fail-safe position.
Position indication
visual indicator, 0° to 95°
(0° is spring return position)
Manual override
3 mm hex crank (shipped w/ actuator)
Running time
<75 seconds constant, independent of
load, spring return <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 1/IP40 (with flex conduit)
Housing material
zinc coated steel
Agency listings
cULus to UL873 and CSAC22.2 No 24-93
Noise level
<45 dB(A)
Servicing
maintenance free
Quality
ISO 9001, 5-year Belimo warranty
Weight
6.0 lbs (2.7 kg.), [-S] 6.5 lbs (3 kg)
Auxiliary switch
2 x SPDT 7A resistive, 2.5A inductive at
120/250VAC. UL listed, double-insulated, one
set at +10°, one adjustable 30° to 90°
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 crankarm 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° position.
The actuator may be mechanically paralleled or “piggybacked.” Up to 4
actuators may be mechanically paralleled on the same shaft. Wiring must
be 3-3-3-3 from the control signal. The signal must change at least .25V
when changing directions and .1V when moving in the same direction.
The wire 5 feedback can be used to parallel up to five additional actuators
on different dampers. 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.
Dimensions
(All numbers in brackets are in millimeters.)
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]
K4-2 (Standard):
½" to 1.05"
Optional:
½"
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]
K4-2 (Standard):
½" to 1.05"
Optional:
½"
Proportional Fire and Smoke Actuator, Spring Return, 24V. 2 to 10 VDC and
4 to 20 mA Control Signal. Output Signal of 2 to 10 VDC for Position Indication.
Operation at 250°F for Limited Time per Ul555S Testing.
