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as a "Bolt-On" kit
it does not require external start components for standard operation
flexible heater tapes with appropriate wattage per lineal foot should be used instead
This specific model is a single-pole 1NC (Normally Closed) assembly
utilizing genuine Schneider Electric PNV-251 parts prevents premature fatigue often seen with standard-rated components in extreme thermal cycles
Lennox 78M19 Supply Air Sensor R-448A as a "Bolt-On" kitThe Lennox 78M19 Supply Air Sensor (alternative part C0SNSR20AE1) is an essential component for maintaining precision discharge air control in high performance HVAC systems. Designed for integration with Lennox Prodigy Unit Controllers and CORE Control Systems, this supply static differential pressure sensor provides the critical feedback needed for Constant Air Volume Bypass (CAVB) and Variable Air Volume (VAV) applications. Whether you are servicing