1. Introducing The Updated Honeywell Low/Medium
Torque Fire and Smoke Actuator
Fort Lauderdale: DtiCorp.com(http://www.DtiCorp.com) is pleased to announce the availability of the
updated Honeywell Low/Medium Torque Fire and Smoke Actuator. The updated actuator is a
universal replacement for the existing Honeywell and competitor models. The primary technical
specifications (Torque, Timing, Form Factor, etc.) remain unchanged, while new features have been
added to enable reversible mounting orientation as well as the option to order with or without internal
auxiliary switches.
The updated Fire and Smoke actuator simplifies the replacement process by offering the new time
saving installation features as well as reducing the number of models needed by providing a universal
replacement.Honeywell is the leading supplier of fire and smoke damper actuators designed for UL555
and UL555S.
Product Information
-Reversible design enables mounting for clockwise or counter-clockwise spring return with one model.
This reduces ordering errors/confusion as well as simplifes the ability to stock inventory of a universal
replacement.
-Optional internal end switches reduce the installation time and eliminates the need for an accessory
auxiliary switch pack that was required in the past for confirming full open or full close of the
actuator/damper. The overall price with switches is reduced when buying an actuator with internal end
switches versus purchasing an actuator without end switches in addition to an accessory switch pack.
-Clip-in conduit connections have been added to the base of the actuator to simplify wiring and
connection of flexible conduit. Installation time is reduced with the new conduit connections that require
no tools or connectors to secure metal flexible conduit.
-Simplified shaft adapter enables fast, tight and secure connection to the damper shaft. The new shaft
adapter is stronger than used previously and only requires two set screws for all models.
Applications

2. The MS4104, MS4109, MS4604, MS4609, MS8104 and MS8109 Fast-Acting, Two-Position Actuators
are spring return direct coupled actuators (DCA) for Fire and Smoke dampers (on/off control). 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 rotation.
The fast drive and spring return time of 15 seconds make them suitable for building codes requiring fast
timing.
Product Availability
Product is available now. Shipments are based on a 3-day service class.
Stocking Models
The following models are the most common for replacement stocking purposes:
-MS4104F1210 – 30 lb-in; 120 V; with switches
- MS4109F1210 – 80 lb-in; 120 V; with switches
-MS4120F1204 – 175 lb-in; 120 V; with switches (Existing high-torque model)
About Us: DtiCorp.Com (http://www.DtiCorp.com) carries more than 35,000 HVAC products,
including industrial, commercial and residential parts and equipment from Honeywell, Johnson Controls,
Robertshaw, Jandy, Armstrong and more. Our online catalog is easy to navigate and search, and all
products have a picture and a description. If a customer has any questions about a product, they can call
800-757-5999 and speak with one of our product experts. Our mission is to offer the best prices
anywhere to our customers.
Keywords:Two-Position Actuators, internal auxiliary switches, Honeywell Low/Medium Torque Fire and
Smoke Actuator, direct coupled actuators (DCA)