Optimized Airflow Sequencing: Designed to bring the blower fan on in coordination with the first heating stage to prevent limit switch tripping

this board is frequently used in AVY24B3XH21A and 2HE04505458 models

Can the DM24-70 handle 4-20mA signals without an external resistor

Simplified Installation: Standard footprint and clear schematics allow for fast swaps during service calls

Durable Construction: Fabricated from heavy-gauge galvanized steel to resist corrosion and withstand high-heat exhaust environments

Lochinvar & A.O. Smith 100233667 Gasket 328140-751 Optimized Airflow Sequencing: Designed toThe Lochinvar & A. O. Smith 100233667 Gasket is a critical OEM component specifically engineered for sight glass assemblies in high efficiency commercial boilers and water heaters. As a veteran technician knows, maintaining a gastight seal at the observation port is non negotiable for safe combustion monitoring. This replacement gasket is the direct successor to the obsolete GKT20057, designed to withstand the high thermal stresses found in Lochinvar