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Thermocouple Adapter THERMAL SAFETY SWITCHES

Thermal Safety Switches

Thermal Safety Switches efficiently detect flue gas spillage due to a blocked flue, continuous down drafting or inadequate draft condition.

The Field Controls Thermal Safety Switch detects the increased heat generated by the flue gas spillage and deactivates the furnace or boiler. It will not allow the burner to restart until the switch has been manually reset.

When do use a Thermal Safety Switch?

On Barometric Draft Controls and draft hoods to detect flue gas spillage and deactivate oil and gas burners.

What does a thermal safety switch do?

A thermal safety switch is an electromechanical device which opens and closes contacts to control the flow of electrical current in response to temperature change. The term “Thermal Cutoff Switch” generally refers to how the switch is used.

What is a thermal safety cut off switch?

A thermal safety cutoff is an electrical safety device that interrupts electric current when heated to a specific temperature. These devices may be for one-time use or may be reset manually or automatically.

NOTE: Most of Field Controls thermal safety switches are either SPDT (Single Pole Double Throw) or SPST (Single Pole Single Throw).

Specifications

PART # MODEL LOAD RATING NORMALLY CLOSED SWITCH SWITCH TYPE CONTACT MATERIAL APPLICATION
AMP VOLTS OPENS (° F) CLOSES
46086900 WMO-1 10 120 200 Manual Reset SPST silver Manual reset. Designed for use with power venting and chimney vented systems for oil-fired applications.
01170004 FTS-4 12
6
120
240
140 Manual Reset SPST silver Draft Control or Draft Hood mounting Manual reset. Quicker response time than FTS-6.
01170006 FTS-6 12
6
120
240
180 Manual Reset SPST silver Draft Control or Draft Hood mounting Manual reset. For use on 24/120/240 Volt equipment over 400,000 BTU/hr.
46086400 GSK-3 24 Millivolt 24 AC 180 Manual Reset SPST gold Standard Gold Contact Manual Reset Switch. For gas-fired millivolt or 24 VAC application.
46086402 GSK-4 24 Millivolt 24 AC 200 Manual Reset SPST gold Manual Reset Switch, same as GSK-3. Where slower response time is a requirement.
46086403 GSK-160A 24 120 160 Automatic Reset SPST silver Draft induced furnaces.
46086404 GSK-250M 24 Millivolt 24 AC 250 Manual Reset SPST silver Steam Boilers.
46564100 LS-140A 15 120 140 Automatic Reset SPDT silver Plastic vent applications.
46564200 LS-550A 15 120 550 Automatic Reset SPDT silver B-vent applications.
46111501 SSK-1 24 Millivolt 24 AC 180 Manual Reset SPST gold Kit includes (2) GSK-3 switches (1) 6 ft. length of 12 GA wire and Switch Jumper Wire.
46111503 SSK-3 24 Millivolt 24 AC 200 Manual Reset SPST gold Kit same as SSK-2 Kit, except switches not enclosed in electrical box.
46082700 TCA-1





Required adapter for operation of Gold Contact Thermal Safety Switches with 30 millivolt systems (residential water heaters).
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