This Honeywell MS4104F1010 Two Position Actuator is used for fire and smoke dampers (on/off control). This actuator obtains an on/off signal from a single-pole, single throw (SPST) controller. Reversible mounting permits actuator to be used for both clockwise (cw) and counterclockwise (ccw) spring rotation.

• Reversible style permits mounting for clockwise or counterclockwise spring return with one model
• Actuator holds rated torque at lower power level
• Round 1/2 inch shaft adapter with 1/4 inch set screws
• Designed to operate reliably in smoke control systems requiring Underwriter's Laboratories Inc. UL555S ratings up to 176 C.
• SPST position-indicating switches (7 degree, 85 degree stroke)
• Integral spring return ensures level of return torque
• Fifteen-second spring return timing
• No special cycling required during long-term holding
• No audible noise during holding
• 30 lb-in. (3.4 Nm) or 80 lb-in. (5.9 Nm) minimum driving torque at 350 F (176 C)
• Housing design allows flush mounting to damper
• Country of origin: Mexico