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specifically Millivolt high-limit applications
responsible for purging the heat exchanger of residual combustion gases and ensuring the negative pressure required to close the furnace pressure switch
This hot surface ignitor typically shows a cold resistance between 50 and 1100 Ohms
Direct OEM Compatibility: Replaces Reznor part 170108 exactly
Does this unit come with an access valve
McDonnell & Miller FS4-3S Switch 322838-754 specifically Millivolt high-limit applicationsThe McDonnell & Miller FS4 3S (Part Number 114641) is a rugged general purpose liquid flow switch specifically engineered for high demand hydronic and industrial applications. This 1" NPT flow switch features a high grade stainless steel body and hardened stainless steel bearings to minimize friction and prevent mechanical failure in the field. Designed as the direct replacement for FS4 3S E, it integrates a Single Pole Double Throw (SPDT) snap switch