Duct High Limit Switches Control Exhaust Fans

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In: Building Automation Systems, HVAC

Many buildings require a high limit switch to prevent spread of fire or smoke. If the building uses an exhaust fan to maintain cooling, many building inspectors will require a limit control to be in place, such as the TC duct high limit switch. A duct high limit switch can sense temperature change up to 200°F. If a fire or smoke is present, to avoid the exhaust fan from spreading the fire and smoke throughout the building, the duct high limit switch senses the air temperature change to shut down the exhaust fan preventing spread of the fire and smoke. Continue reading below for moreRead More →

Duct Fan and Limit Switch

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In: Company News

Our CEMCO TC switch product line currently only provides a limit switch solution (contacts open on temperature rise). Many of our competitors offer a duct fan and limit switch solution that we have began research and product development. The duct fan and limit switches will open and close two sets of contacts when there is a change in temperature. If you have a requirement for a fan and limit switch, click here to contact us. Duct Fan and Limit Switch Product Development Recently, a manufacture reached out to us with a temperature monitoring application where they would like to have a thermostat switch that controlledRead More →

Adjustable Temperature Switch Manufacturer

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In: Helpful Information

Senasys, a leading sensor and switch manufacture, provides a variety of adjustable temperature switches for monitoring and controlling different heating elements. Duct Limit Control Bulb and Capillary Temperature Switches Line Voltage Thermostats Electronic Temperature Control Our adjustable temperature switches are made in the USA, 100% tested before leaving the factory and sold all over the globe. Looking for more information on which adjustable temperature switch fits your application best? Continue reading below for information on each kind of temperature switch Senasys manufactures, or click here to contact our technical support team.  Different Types of Adjustable Temperature Switches Senasys is a leading manufacturer of temperature switchingRead More →

How to Install Firestat in HVAC System

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In: Helpful Information

Firestat units are commonly installed in air duct systems to control the spread of fire and smoke when air temperature exceeds a pre-determined temperature. A simple control that is just as simple to install. Adjust the temperature dial to determined temperature (Click here for more information.) Install into the air duct system downstream of air flow. Wire the Firestat to a fan For more information about installing a Firestat in an air duct system, click the diagram below. To purchase a Firestat unit, click here!  How to Install Firestat in HVAC System The CEMCO TC Series Firestat is a push-button manual reset limit control designedRead More →

TC Duct High Limit

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In: Building Automation Systems

A duct limit control is commonly used in HVAC systems to detect air temperature inside a duct. Although, these temperature controls can also be found in grain dryers. The duct limit control functions the same in the grain dryer, but rather than sensing a building air duct temperature, the limit control senses a change in air temperature inside the dryer. When the grain blocks the air flow temperature, the duct limit control senses the temperature change shutting down the system. The operator must clear the blockage and manually reset the duct limit control to resume operation. Our duct limit control is available in two differentRead More →

Firestat Duct High Limit Cross Reference Part Index, Kele, Johnson Controls, 5D51-35, 5D51-90, 5D51-78, L4064, A25 Johnson Controls

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In: Helpful Information

Duct Limit Switch Product Guide Click here to purchase a Firestat unit today! We decided to upload this table giving our customers the accessibility to a cross reference of our duct limit switches with other models including White Rodgers, Honeywell, and Johnson Controls. Our duct limit switches listed are comparative to a couple of the top competitors if not identical. Pricing listed is Retail, contact us for larger quantity pricing and availability. Duct limit switches are installed in air ducts to shut down heating, air conditioning and ventilation equipment when air temperature in duct exceeds a pre-set limit.  The high limit firestats have a temperature range of 100°F to 250°FRead More →

Duct Limit Switch Common Application

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In: Building Automation Systems, HVAC

Senasys TC duct limit control, or also known as firestat, is required among many states to be installed in large apartment complexes and commercial buildings. The firestat is a sensing device that shuts down airflow in the event of a critical temperature increase within an air duct. Senasys offers two different firestat options, fixed or adjustable; and multiple sensing element lengths are available (5″. 7.5″, 11″ or custom). For more information about the building code regulation and how the firestat functions, continue reading below. If you have a requirement for the firestat within a common shared HVAC systems, click here to send a request forRead More →