Product Overview

GSK Safety Switches
Introducing two new
• 160˚ activation
• Auto reset
• 250˚ activation
• Manual reset
GSK -160A
for Draft Induced Furnaces
GSK -250M
for Steam Boilers
Models Typical Applications
Our thermal safety switches efficiently detect flue
gas spillage due to a blocked flue, continuous down
drafting or inadequate draft condition. With the safety
switch wired in series with the burner circuit, the switch
will de-energize the system’s burner or burner control
once it senses the spillage of hot flue gases. Available
for gas-fired and oil-fired applications.
•FTS-4 & FTS-6
Designed for use on large gas furnaces and boilers. Can
be mounted on Draft Hood or double-acting Barometric
Draft Control (both brackets included). Manual reset.
•SSK-1 & SSK-3
Kit form of GSK-3 or GSK-4 generally used on millivolt
water heaters. Can also be used with 24 VAC gas
furnaces or boilers. Kit includes (2) GSK style Thermal
Safety Switches, (1) 12-gauge Jumper Wire and (1) 6 ft.
length 12-gauge lead wire. SSK-3 switches not supplied
with switch enclosures. TCA-1 or TCA-2 Thermocouple
Adapter required for 30 millivolt applications.
•WMO-1
Designed for use with power venting and chimney vented
systems for oil-fired applications. Manual reset.
•GSK-160A & GSK-250M
The GSK-160A is designed for use on draft induced
furnaces. Activates at 160˚. Silver Contacts. Auto reset.
The GSK-250M is designed for use on steam boilers.
Activates at 250˚. Silver Contacts. Manual reset.
•GSK-3 & GSK-4
Designed for use on residential and light commercial
millivolt or 24 VAC gas furnaces, boilers and water
heaters. Generally used with sidewall venting applications.
Note: For 30 millivolt applications (residential water
heaters), a thermocouple adapter is required to connect
the GSK. The TCA is used to splice into the thermocouple
circuit. The TCA-1 has standard threads. The TCA-2 has
left handed threads for Flame Guard water heaters.
FTS
GSK
SSK
TCA
WMO
On Barometric Draft Controls and draft hoods
to detect flue gas spillage and deactivate oil and
gas burners.
The 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 to use a Thermal Safety Switch
How Thermal Safety Switches Work
Improved safety for oil
and gas appliances
NEW