APPLICATION
MS4103F, MS8103F Spring Return Direct Coupled
Actuators (DCA) are used within Fire/Smoke damper
control applications. The actuator accepts an on/off signal
from a single-pole, single-throw (spst) controller.
Reversible mounting allows actuator to be used for either
clockwise (cw) or counterclockwise (ccw) spring return
and are designed to operate reliably in smoke control
systems requiring Underwriter's Laboratories Inc. UL555S
ratings up to 250°F.
FEATURES
• 27 lb-in (3 Nm) minimum driving torque
• Spring return timing < 25 s
• Optimized drive time < 45 s. No audible noise during
holding
• Models available for 24V, 120/230 VAC.
• 95° angle of rotation
• Actuator holds rated torque at reduced power level
https://customer.honeywell.com/en-US/Pages/department.aspx?cat=HonECC%20Catalog&category=Commercial&catpath=1.1
3Nm Fire and Smoke 250°F Series
Spring Return Direct Coupled
Actuators
MS4103F, MS8103F
• Operating temperature from 14°F to 131°F (-10°C to
• Housing design allows flush mounting to damper
• Models available with SPST position-indicating
• Quarter-turn rotary valves, such as ball valves
• Available with cable on all models
• 1/2" 360° Conduit connection with thread
SPECIFICATIONS
Models:
See Table 1.
Device Weight:
1.7 lbs (0.78 kg)
Ambient Operating Temperature:
14°F to 131°F (-10°C to 55°C)
Shipping and Storage Temperature:
-40°F to 150°F (-40°C to 65°C)
INSTALLATION INSTRUCTIONS
55°C) at 95% RH
switches (10°, 80° stroke)
mounted directly to the drive shaft
38-00087EFRTA-01