this direct spark ignition (DSI) and resistance-based glow bar ensures precise fuel ignition across a broad range of Carrier

OEM Precision: Direct fit replacement for part number 025-18452-000

Operating at dual speeds of 2700/2880 RPM

Ensure you are using 24V power and verify terminal assignments against the technical datasheet to ensure the humidity voltage signal matches your controller input

Lochinvar & A.O. Smith 100108882 Pressure Switch 318172-701 this direct spark ignition (DSI)The Lochinvar 100108882 (also indexed under A. O. Smith 100108882) is a critical safety differential air pressure switch designed for commercial boilers and water heaters. Calibrated for a fixed setpoint of 1. 10" W. C., this SPNO (Single Pole Normally Open) switch ensures the combustion blower is generating sufficient airflow before allowing the ignition sequence to proceed. As an OEM replacement part, it is engineered to maintain high limit accuracy