Description
The Lochinvar & A.O. Smith 100208392 is an open-on-low pressure switch designed as a direct OEM replacement for Lochinvar and A.O. Smith boiler and water heater applications. With a 1/20″ w.c. (inches water column) set point, this switch opens the control circuit when system pressure drops below the rated threshold, providing reliable low-pressure protection and helping prevent unsafe or inefficient operation.
The manual reset (M/R) design requires a deliberate operator action to restore the circuit after a trip event, ensuring that the underlying cause of the pressure loss is addressed before the system is returned to service. The 1/4″ NPT port allows for straightforward installation into standard gas train or combustion air pressure tapping points.
Key Features
- OEM replacement part for Lochinvar and A.O. Smith boiler and water heater equipment
- Open-on-low pressure action — opens circuit when pressure falls below set point
- 1/20″ w.c. (inches water column) pressure set point
- Manual reset (M/R) — requires operator reset after trip for added safety
- 1/4″ NPT pressure port for standard installation
- Designed for gas train, combustion air, or draft pressure monitoring applications
Specifications
- SKU: 100208392
- Brand: Lochinvar & A.O. Smith
- Switch Action: Open on Low Pressure
- Set Point: 1/20″ w.c.
- Reset Type: Manual Reset (M/R)
- Port Connection: 1/4″ NPT
Application
This pressure switch is intended for use in Lochinvar and A.O. Smith commercial and residential boiler or water heater systems where low-pressure detection is required. Always verify compatibility with your specific equipment model before installation. Consult the original equipment documentation or a qualified technician for proper set point and wiring requirements.
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