Lochinvar & A.O. Smith 100112849 Switch
The Lochinvar & A.O. Smith 100112849 Air Pressure Switch is a critical safety and operational component designed for high-efficiency commercial water heaters and boilers, including the GWH 1200 and GWH 1250 Series 600 models. This normally closed (NC) switch is factory-calibrated to a 0.68" water column (w.c.) set point, ensuring the combustion fan is generating sufficient static pressure before allowing the ignition sequence to proceed. As a genuine OEM replacement part, it maintains the precise pressure regulation required to prevent flue gas spillage and ensure optimal air-to-gas ratios within the combustion chamber.
Constructed for the rigors of industrial mechanical rooms, the 100112849 pressure switch features a durable diaphragm housing and high-conductivity electrical terminals to minimize resistance. For contractors performing HVAC diagnostics, this switch is the primary solution for resolving common ignition failure codes or "low air" faults. Its direct-fit design allows for rapid installation into existing Lochinvar boiler or A.O. Smith commercial water heater control loops, restoring system reliability and safety without the need for field modifications or bracket retrofitting.
Key Benefits- Precise Calibration: Factory-set at 0.68" w.c. for exacting safety tolerances in vented combustion systems.
- OEM Compatibility: Seamlessly replaces A.O. Smith 9008566005 and supports multiple industrial GWH series configurations.
- Durability: Engineered to withstand the high-cycle demands of commercial differential pressure monitoring.
- Reliable Switching: Normally closed contact logic ensures fail-safe operation during the pre-purge cycle.
How do I know if the 100112849 switch is failing?
Technicians typically observe the system failing to move past the inducer fan start-up phase. If the fan is running but the ignition doesn't spark, use a manometer to verify if the 0.68" w.c. set point is being reached at the switch port.
Can this switch be used in other Lochinvar models?
While this part is standard for the GWH 1250 Series 600, always verify your specific model and serial number. Pressure switches are safety-critical and must match the specified water column rating of the original equipment.
Is the set point adjustable on this model?
This specific air pressure switch is factory-calibrated for a fixed set point to ensure the unit operates within the manufacturer's safety parameters; field adjustments are not recommended for this OEM part.
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: $31.84
-65%$31.84
$11.14Lochinvar & A.O. Smith 100112849 Switch
The Lochinvar & A.O. Smith 100112849 Air Pressure Switch is a critical safety and operational component designed for high-efficiency commercial water heaters and boilers, including the GWH 1200 and GWH 1250 Series 600 models. This normally closed (NC) switch is factory-calibrated to a 0.68" water column (w.c.) set point, ensuring the combustion fan is generating sufficient static pressure before allowing the ignition sequence to proceed. As a genuine OEM replacement part, it maintains the precise pressure regulation required to prevent flue gas spillage and ensure optimal air-to-gas ratios within the combustion chamber.
Constructed for the rigors of industrial mechanical rooms, the 100112849 pressure switch features a durable diaphragm housing and high-conductivity electrical terminals to minimize resistance. For contractors performing HVAC diagnostics, this switch is the primary solution for resolving common ignition failure codes or "low air" faults. Its direct-fit design allows for rapid installation into existing Lochinvar boiler or A.O. Smith commercial water heater control loops, restoring system reliability and safety without the need for field modifications or bracket retrofitting.
Key Benefits- Precise Calibration: Factory-set at 0.68" w.c. for exacting safety tolerances in vented combustion systems.
- OEM Compatibility: Seamlessly replaces A.O. Smith 9008566005 and supports multiple industrial GWH series configurations.
- Durability: Engineered to withstand the high-cycle demands of commercial differential pressure monitoring.
- Reliable Switching: Normally closed contact logic ensures fail-safe operation during the pre-purge cycle.
How do I know if the 100112849 switch is failing?
Technicians typically observe the system failing to move past the inducer fan start-up phase. If the fan is running but the ignition doesn't spark, use a manometer to verify if the 0.68" w.c. set point is being reached at the switch port.
Can this switch be used in other Lochinvar models?
While this part is standard for the GWH 1250 Series 600, always verify your specific model and serial number. Pressure switches are safety-critical and must match the specified water column rating of the original equipment.
Is the set point adjustable on this model?
This specific air pressure switch is factory-calibrated for a fixed set point to ensure the unit operates within the manufacturer's safety parameters; field adjustments are not recommended for this OEM part.
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 Lochinvar & A.O. Smith 100112849 Air Pressure Switch is a critical safety and operational component designed for high-efficiency commercial water heaters and boilers, including the GWH 1200 and GWH 1250 Series 600 models. This normally closed (NC) switch is factory-calibrated to a 0.68" water column (w.c.) set point, ensuring the combustion fan is generating sufficient static pressure before allowing the ignition sequence to proceed. As a genuine OEM replacement part, it maintains the precise pressure regulation required to prevent flue gas spillage and ensure optimal air-to-gas ratios within the combustion chamber.
Constructed for the rigors of industrial mechanical rooms, the 100112849 pressure switch features a durable diaphragm housing and high-conductivity electrical terminals to minimize resistance. For contractors performing HVAC diagnostics, this switch is the primary solution for resolving common ignition failure codes or "low air" faults. Its direct-fit design allows for rapid installation into existing Lochinvar boiler or A.O. Smith commercial water heater control loops, restoring system reliability and safety without the need for field modifications or bracket retrofitting.
Key Benefits- Precise Calibration: Factory-set at 0.68" w.c. for exacting safety tolerances in vented combustion systems.
- OEM Compatibility: Seamlessly replaces A.O. Smith 9008566005 and supports multiple industrial GWH series configurations.
- Durability: Engineered to withstand the high-cycle demands of commercial differential pressure monitoring.
- Reliable Switching: Normally closed contact logic ensures fail-safe operation during the pre-purge cycle.
How do I know if the 100112849 switch is failing?
Technicians typically observe the system failing to move past the inducer fan start-up phase. If the fan is running but the ignition doesn't spark, use a manometer to verify if the 0.68" w.c. set point is being reached at the switch port.
Can this switch be used in other Lochinvar models?
While this part is standard for the GWH 1250 Series 600, always verify your specific model and serial number. Pressure switches are safety-critical and must match the specified water column rating of the original equipment.
Is the set point adjustable on this model?
This specific air pressure switch is factory-calibrated for a fixed set point to ensure the unit operates within the manufacturer's safety parameters; field adjustments are not recommended for this OEM part.
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.
