Field Controls 1170004 Switch

The Field Controls 1170004 (FTS-4) is a critical manual reset thermal safety switch designed to protect gas-fired furnaces, boilers, and water heaters from hazardous flue gas spillage. This SPST thermal switch monitors temperatures at the draft hood or barometric control, effectively de-energizing the burner circuit if hot gases escape due to a blocked flue or inadequate chimney draft. Engineered for heavy-duty applications, it features a 140°F fixed setpoint and is rated for 120/240V operation, making it a versatile spill switch replacement for commercial and residential heating systems. The manual reset requirement ensures that a technician must inspect the venting system before the appliance can be placed back into service, preventing repeated exposure to combustion byproducts like carbon monoxide. Each unit includes the necessary mounting brackets for installation on a variety of draft controls and hoods.

• Prevents Flue Gas Spillage: Detects blocked venting or backdrafting and shuts down the burner within two minutes of exposure to hot gases.
• Manual Reset Security: Ensures the underlying venting issue is addressed by a professional before the system resumes operation.
• Universal Mounting: Includes brackets for installation on both draft hoods and double-acting barometric controls.
• High Load Capacity: Rated for 12 Amps at 120V AC and 6 Amps at 240V AC, compatible with most HVAC burner control circuits.
• Reliable Construction: Features high-grade silver contacts for long-term switching reliability in high-temperature environments.

How do I wire a 140F manual reset spill switch?
The switch should be wired in series with the gas burner control or the limit control circuit. Always verify local codes and the National Electrical Code (NEC) during installation.

What causes a Field Controls thermal switch to trip?
The switch trips when it detects temperatures exceeding 140°F at the draft control, typically caused by a blocked chimney, downdrafts, or a failed power venter.

Can this replace a self-resetting thermal switch?
Yes, in applications where a manual safety check is preferred or required by code, the 1170004 manual reset provides an added layer of safety over automatic reset models.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.