Marvair 50023 Heat Coil 324846-701 Common causes include restricted return

Common causes include restricted return airflow

Technical Durability: Rated for a maximum water temperature of 170°F (77°C) and water supply pressures up to 150 PSIG

It operates via 20-30Vac hardwire or battery power for millivolt systems

a upgrade for standard S3 series coils

The included gasket ensures a gas-tight seal at the collector box

Marvair 50023 Heat Coil 324846-701 Common causes include restricted returnThe Marvair 50023 Heat Coil is a 24V resistive heating component engineered for climate control in demanding environments such as telecom shelters, modular buildings, and educational facilities. Directly interchangeable with the HCR 12AQ1AA, this coil serves as a critical 24V auxiliary heat source, converting electrical energy into precise thermal output to maintain stable operating temperatures during low ambient conditions. Its DPDT switching relay