Vulcain IAQPT-SM-A Monitor 30067439-890 By integrating this HVAC sequencer

By integrating this HVAC sequencer relay into your control board circuit

the thermocouple and pilot burner should be cleaned and tested for millivolt output during annual preventative maintenance

electrically-operated shutoff valve

Substantial Capillary Reach: The 36-inch capillary tube provides flexibility for remote mounting in complex control panels

The Lennox 82A6301 is functionally identical to the 82A63

Vulcain IAQPT-SM-A Monitor 30067439-890 By integrating this HVAC sequencerThe Vulcain IAQPT SM A is a high precision, wall mounted CO2 gas monitor engineered for demand control ventilation (DCV) and indoor air quality management. As a direct replacement for legacy models including the 90DM4SM C, IAQ SM A, and M 512041, this unit utilizes advanced non dispersive infrared (NDIR) dual beam technology to compensate for sensor drift and ensure long term signal stability. Designed for seamless integration into building management