and R-134a refrigerants

Featuring a 8 cubic inch desiccant volume

the bulb should be placed at the 4 or 8 o’clock position

With an adjustable range of 2 to 26 PSI and a 1

making it a reliable direct replacement heat sequencer for many original equipment configurations

York 331-03478-605 Chiller Service Board Kit 321042-401 and R-134a refrigerantsThe York 331 03478 605 Chiller Service Board Kit is the verified OEM replacement for the obsolete 331 03478 101 and 331 03478 609 models. Engineered for high performance York YVAA, YVFA, and YAGK chillers, this Service Board Kit is critical for restoring HVAC control system integrity and system communication. For technicians troubleshooting chiller fault codes or "unit won\'t start" conditions, this control board maintains the precise operational