3NM FIRE AND SMOKE 250°F SERIES SPRING RETURN DIRECT COUPLED ACTUATORS
Control
Input /
Output
Model Number
Description
MS8103F1021
MS8103F1023
MS8103F1025
MS8103F1026
MS8103F1221
MS8103F1223
MS8103F1225
MS8103F1226
2-Position
MS4103F1021
MS4103F1023
MS4103F1025
MS4103F1026
MS4103F1221
MS4103F1223
MS4103F1225
MS4103F1226
Humidity Ratings:
5% to 95% R.H., Non-Condensing
Auxiliary Switches (Two SPST):
Fixed switches on 10 and 80 degrees
125 VAC, 1A, res. load
Mounting:
Self-Centering Shaft Adapter (shaft coupling):
Round Damper Shafts: 3/8 to 5/8 in. (9 to 16 mm)
Square Damper Shafts: 1/4 to 1/2 in. (6 to 13 mm)
Nominal tightening torque for self-centering shaft
adapter screw is 106 lb-in (12 Nm)
Environmental Data as per UL 60730:
Purpose of
Control
Action Type
Pollution
Degree
Impulse
330 V for Class 2 (SELV) models MS8103F
Voltage
2500 V for Line voltage models MS4103F
38-00087EFRTA—01
SPST
Aux
Switches
Conduit
Threaded
No End Switches
Clip-In
Threaded
2 End Switches
Clip-In
Threaded
No End Switches
Clip-In
Threaded
2 End Switches
Clip-In
Operating Control
1
3
Table 1. Models.
1/2"
360°
Shaft
Adapter
Torque
SCSA
U-Bolt
SCSA
U-Bolt
3 Nm
SCSA
(27 in-lb)
U-Bolt
SCSA
U-Bolt
SCSA
Non Self-Centering Shaft Adapter:
Round Damper Shafts: 1/4 to 3/4 in. (6 to 19 mm)
Square Damper Shafts: 1/4 to 1/2 in. (6 to 13 mm)
Nominal tightening torque for non self-centering shaft
adapter screws is 62 lb-in (7 Nm)
Minimum Damper Shaft Length for Self-Centering
Shaft Adapter:
3.25 in. (83 mm) recommended
Minimum Damper Shaft Length for Non Self -Centering
Shaft Adapter:
3 in. (75 mm)
Spring Return Timing (at rated load and operating tem-
perature range):
< 25 seconds
Cable Specification:
Low-Voltage Power Cable: Flammability rating UL VW1,
3 ft (0.914 m) length from end of access cover, 18 AWG.
In Plenum spaces use flexible conduit to protect the
wiring.
Line-Voltage Power Cable: Flammability rating UL VW1,
3 ft (0.914 m) length from end of access cover, 18 AWG.
In Plenum spaces use flexible conduit to protect the
wiring.
Switch Cable: Flammability rating UL VW1, 3 ft (0.914 m)
length from end of access cover, 18 AWG. In Plenum
spaces use flexible conduit to protect the wiring.
2
Driving/
Holding
Supply Voltage
(VA)
24VDC +/- 20%
24VAC +/- 20%,
6/3
50/60Hz
120VAC-230VAC
+/-10%,
6/5
50/60Hz
Drive
(sec)
<45s at
operating
temperature
range