fbpx skip to Main Content
WMO-1 Thermal Safety Switches
WMO-1 Thermal Safety Switches
FTS-4 Thermal Safety Switches
FTS-6 Safety Switch
GSK Thermal Safety Switches
SSK Safety Switch
TCA-1 Thermal Safety Switches
WMO-1 Thermal Safety SwitchesFTS-4 Thermal Safety SwitchesFTS-6 Safety SwitchGSK Thermal Safety SwitchesSSK Safety SwitchTCA-1 Thermal Safety Switches

Highlights of the Thermal Safety Switches

  • SAFE: Detects flue gas spillage or leakage due to blocked flue
Features of the Thermal Safety Switches

Thermal Safety Switches 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).

Thermal safety switches should be installed by a licensed contractor. Find a contractor in your area.

Specifications of the Thermal Safety Switches
Model Part Number Load Rating Normally Closed Switch Switch Type Contact Material Application
Amp Volts Opens Closes
WMO-1 46086900 10 120 200°F Manual Reset SPST silver Manual reset. Designed for use with power venting and chimney vented systems for oil-fired applications.
FTS-4 01170004 12
6
120
240
140°F Manual Reset SPST silver Draft Control or Draft Hood mounting Manual reset. Quicker response time than FTS-6.
FTS-6 01170006 12
6
120
240
180°F 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.
GSK-3 46086400 24 Millivolt 24 AC 180 Manual Reset SPST gold Standard Gold Contact Manual Reset Switch. For gas-fired millivolt or 24 VAC application.
GSK-4 46086402 24 Millivolt 24 AC 200 Manual Reset SPST gold Manual Reset Switch, same as GSK-3. Where slower response time is a requirement.
GSK-160A 46086403 24 120 160 Automatic Reset SPST silver Draft induced furnaces.
GSK-250M 46086404 24 Millivolt 24 AC 250 Manual Reset SPST silver Steam Boilers.
LS-550A 46564200 15 120 550 Automatic Reset SPDT silver B-vent applications.
SSK-1 46111501 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.
SSK-3 46111503 24 Millivolt 24 AC 200 Manual Reset SPST gold Kit same as SSK-2 Kit, except switches not enclosed in electrical box.
TCA-1 46082700             Required adapter for operation of Gold Contact Thermal Safety Switches with 30 millivolt systems (residential water heaters).
CONTACT US FOR ADDITIONAL INFORMATION ON SAFETY SWITCHES
Customer Service Rep
Phone
252.522.3031
Address
2630 Airport Road
Kinston, NC 28504
Back To Top