Armstrong International B2721 Contactor Els PW 29614 offering tighten differential settings from

offering tighten differential settings from 1°F to 30°F for superior energy efficiency

25 inch water column switch monitors air or gas pressure to prove combustion blower performance and safe venting conditions before allowing the ignition sequence to proceed

ensuring trace-to-trace wiring alignment for HVAC technicians

Standardized 460v 1/2hp motor specifications ensure compatibility with high-voltage industrial circuits

The regulator features a 3/4" NPT vent

Armstrong International B2721 Contactor Els PW 29614 offering tighten differential settings fromThe Armstrong International B2721 is a high performance 50 Amp Contactor designed specifically for heavy duty industrial and commercial humidification systems. Engineered for precision and longevity, this replacement HVAC contactor serves as a critical component in managing power distribution for Armstrong steam humidifiers. It is fully compatible with EHU 600, EHU 601, EHU 602, EHU 701, EHU 703, and EHU 704 models, as well as the HC Series