Field Controls 46086404 Safety Switch
The Field Controls 46086404 (Model GSK-250M) is a high-limit manual reset thermal safety switch engineered for critical spillage detection in steam boilers and high-temperature gas-fired appliances. This SPST normally closed switch provides precise circuit interruption when flue temperatures reach the 250 degree Fahrenheit setpoint, preventing hazardous combustion byproduct leakage into the mechanical room. Designed for versatility in the field, the GSK-250M is compatible with both millivolt (mV) and 24Vac control circuits, utilizing silver contact material to maintain reliable electrical continuity under 24VA load ratings. Ideal for retrofitting or replacing worn sensors on barometric draft controls and draft hoods, this safety device ensures the burner remains deactivated until the underlying draft issue or blocked flue condition is addressed and the 250F manual reset switch is physically engaged by a technician.
Key Benefits:
- Dual-Voltage Compatibility: Operates seamlessly across millivolt (mV) and 24Vac systems, reducing the need for truck-stocking multiple SKUs.
- High-Temperature Protection: calibrated for a 250 degree Fahrenheit trip point, specifically tailored for the higher exhaust profiles of steam boiler applications.
- Failsafe Manual Reset: Ensures the HVAC professional must inspect the venting system before the burner can be restarted, enhancing overall site safety.
- Spillage Detection: Mounts directly to draft hoods to sense flue gas redirection caused by blocked flues or inadequate chimney draft.
- Durable Construction: Features robust silver contacts and a single pole single throw (SPST) configuration for consistent performance in demanding boiler environments.
Common Questions:
Can the Field Controls GSK-250M be used on residential water heaters?
While compatible with 30-millivolt systems, these switches typically require a junction block or thermocouple adapter for proper integration into residential water heater circuits. For standard gas-fired millivolt applications requiring a lower setpoint, the GSK-3 (180°F) is often preferred unless specific thermal profiles dictate the 250°F limit.
Where should this switch be installed on a draft hood?
Technicians should mount the 46086404 safety switch approximately 3/4" below the draft hood opening, ensuring it does not make direct contact with the metal. For larger draft hoods or appliances without factory-installed switches, using two sensors wired in series is recommended for comprehensive coverage.
How do I test the functionality of the manual reset switch?
After ensuring the flue is clear, a combustion analysis and draft test should be performed. If the switch trips during normal operation, it indicates a spillage issue that must be corrected. Once the cause is resolved, pressing the center button restores the circuit for the 24Vac or millivolt pilot system.
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.
Original: $32.84
-65%$32.84
$11.49Field Controls 46086404 Safety Switch
The Field Controls 46086404 (Model GSK-250M) is a high-limit manual reset thermal safety switch engineered for critical spillage detection in steam boilers and high-temperature gas-fired appliances. This SPST normally closed switch provides precise circuit interruption when flue temperatures reach the 250 degree Fahrenheit setpoint, preventing hazardous combustion byproduct leakage into the mechanical room. Designed for versatility in the field, the GSK-250M is compatible with both millivolt (mV) and 24Vac control circuits, utilizing silver contact material to maintain reliable electrical continuity under 24VA load ratings. Ideal for retrofitting or replacing worn sensors on barometric draft controls and draft hoods, this safety device ensures the burner remains deactivated until the underlying draft issue or blocked flue condition is addressed and the 250F manual reset switch is physically engaged by a technician.
Key Benefits:
- Dual-Voltage Compatibility: Operates seamlessly across millivolt (mV) and 24Vac systems, reducing the need for truck-stocking multiple SKUs.
- High-Temperature Protection: calibrated for a 250 degree Fahrenheit trip point, specifically tailored for the higher exhaust profiles of steam boiler applications.
- Failsafe Manual Reset: Ensures the HVAC professional must inspect the venting system before the burner can be restarted, enhancing overall site safety.
- Spillage Detection: Mounts directly to draft hoods to sense flue gas redirection caused by blocked flues or inadequate chimney draft.
- Durable Construction: Features robust silver contacts and a single pole single throw (SPST) configuration for consistent performance in demanding boiler environments.
Common Questions:
Can the Field Controls GSK-250M be used on residential water heaters?
While compatible with 30-millivolt systems, these switches typically require a junction block or thermocouple adapter for proper integration into residential water heater circuits. For standard gas-fired millivolt applications requiring a lower setpoint, the GSK-3 (180°F) is often preferred unless specific thermal profiles dictate the 250°F limit.
Where should this switch be installed on a draft hood?
Technicians should mount the 46086404 safety switch approximately 3/4" below the draft hood opening, ensuring it does not make direct contact with the metal. For larger draft hoods or appliances without factory-installed switches, using two sensors wired in series is recommended for comprehensive coverage.
How do I test the functionality of the manual reset switch?
After ensuring the flue is clear, a combustion analysis and draft test should be performed. If the switch trips during normal operation, it indicates a spillage issue that must be corrected. Once the cause is resolved, pressing the center button restores the circuit for the 24Vac or millivolt pilot system.
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.
Product Information
Product Information
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Description
The Field Controls 46086404 (Model GSK-250M) is a high-limit manual reset thermal safety switch engineered for critical spillage detection in steam boilers and high-temperature gas-fired appliances. This SPST normally closed switch provides precise circuit interruption when flue temperatures reach the 250 degree Fahrenheit setpoint, preventing hazardous combustion byproduct leakage into the mechanical room. Designed for versatility in the field, the GSK-250M is compatible with both millivolt (mV) and 24Vac control circuits, utilizing silver contact material to maintain reliable electrical continuity under 24VA load ratings. Ideal for retrofitting or replacing worn sensors on barometric draft controls and draft hoods, this safety device ensures the burner remains deactivated until the underlying draft issue or blocked flue condition is addressed and the 250F manual reset switch is physically engaged by a technician.
Key Benefits:
- Dual-Voltage Compatibility: Operates seamlessly across millivolt (mV) and 24Vac systems, reducing the need for truck-stocking multiple SKUs.
- High-Temperature Protection: calibrated for a 250 degree Fahrenheit trip point, specifically tailored for the higher exhaust profiles of steam boiler applications.
- Failsafe Manual Reset: Ensures the HVAC professional must inspect the venting system before the burner can be restarted, enhancing overall site safety.
- Spillage Detection: Mounts directly to draft hoods to sense flue gas redirection caused by blocked flues or inadequate chimney draft.
- Durable Construction: Features robust silver contacts and a single pole single throw (SPST) configuration for consistent performance in demanding boiler environments.
Common Questions:
Can the Field Controls GSK-250M be used on residential water heaters?
While compatible with 30-millivolt systems, these switches typically require a junction block or thermocouple adapter for proper integration into residential water heater circuits. For standard gas-fired millivolt applications requiring a lower setpoint, the GSK-3 (180°F) is often preferred unless specific thermal profiles dictate the 250°F limit.
Where should this switch be installed on a draft hood?
Technicians should mount the 46086404 safety switch approximately 3/4" below the draft hood opening, ensuring it does not make direct contact with the metal. For larger draft hoods or appliances without factory-installed switches, using two sensors wired in series is recommended for comprehensive coverage.
How do I test the functionality of the manual reset switch?
After ensuring the flue is clear, a combustion analysis and draft test should be performed. If the switch trips during normal operation, it indicates a spillage issue that must be corrected. Once the cause is resolved, pressing the center button restores the circuit for the 24Vac or millivolt pilot system.
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.
