Lochinvar & A.O. Smith 100109951 Pressure Switch 321894-706 this module utilizes the LON

this module utilizes the LON TP78 communication protocol to bridge up to nine I/O expansion units with a system manager like the AK-SM 800 series

without a timed delay for combustion air flow

the 30 PSI relief valve should be manually tested by lifting the lever every 30 days during the heating season to ensure the seat is not seized and the discharge path is clear

The wheel is commonly found in specialized units such as the 48HDT006-510 model

Is this sensor compatible with my existing BAS controller

Lochinvar & A.O. Smith 100109951 Pressure Switch 321894-706 this module utilizes the LONWhen you are troubleshooting a pressure switch failure on a high efficiency hydronic system, the Lochinvar & A. O. Smith 100109951 is the specific OEM replacement part required to restore precise combustion air pressure monitoring. This air pressure switch is factory calibrated for the BTN 200 366 series water heaters and boilers, ensuring that the blower is moving sufficient air for safe ignition. As a normally open (NO) switch with a set point of 2.