Lochinvar & A.O. Smith 100110901 Window Observation 319847-401 This model is technically identical

This model is technically identical to the MA51-7100 and features a critical manual override for manual valve positioning and preload adjustment during startup

195-180V Pickup

5-digit LCD cycles through high-side

) contact setup that triggers an alarm loop the moment incoming voltage drops

Flexible SPDT Logic: Dual SPDT contacts allow for simultaneous alarm signaling and system shutdown

Lochinvar & A.O. Smith 100110901 Window Observation 319847-401 This model is technically identicalUpgrade your system monitoring with the Lochinvar & A. O. Smith 100110901 Window Observation assembly. This genuine OEM sight glass replacement is a critical component for service technicians performing routine combustion analysis or checking burner flame quality in high efficiency Lochinvar boilers and A. O. Smith water heaters. Designed to withstand the thermal stress of sealed combustion chambers, this durable observation port ensures an airtight