Common Questions Can I use a single dry contact to trigger multiple RIB21CDC relays

allowing the HVAC high limit switch to re-engage once the system cools to 110°F

ensuring it can handle significant thermal expansion without compromising equipment integrity

For systems exceeding 2 PSI

Industrial-Grade Shielding: Protects against electromagnetic interference (EMI) common in mechanical rooms

Utica-Dunkirk 240009793 Pressure Switch 320720-756 Common Questions Can I useThe Utica Dunkirk 240009793 Pressure Switch is a critical OEM furnace replacement part designed for specific ECR International heating systems, including Dunkirk, Pennco, and Utica Boiler models. This 0. 50" WC pressure switch acts as a primary safety mechanism, monitoring the draft inducer motor to verify adequate negative pressure and airflow before allowing the ignition sequence to proceed. As a veteran grade HVAC safety control, it replaces worn