Common Questions: How do I troubleshoot a pressure switch error on a Reznor heater

The bi-directional fail-safe spring return mechanism ensures dampers move to a "0" position during power loss

" ensuring accurate valve positioning and flow control

The Allanson 421-655-G is typically supplied with the standard mounting plate integrated for rapid field replacement on compatible burner housings

Will this fit models from Allied or Armstrong Air

Tjernlund Products 950-0471 Fan Prover Kit 319848-301 Common Questions: How do IThe Tjernlund Products 950 0471 Fan Prover Kit is a critical safety interlock designed for commercial PAI series intake hoods and induction systems. As a veteran grade pressure switch kit, it serves as the primary mechanism to verify proper airflow before allowing the burner circuit to energize. This OEM Tjernlund 950 0471 assembly features a high precision diaphragm calibrated to 1. 35" WC PF, ensuring that the draft inducer or vent fan is moving