Is my Pre-heater working? Zehnder Status accessing the P-90 Menu

CA-350, CA-550 ComfoFond-L, PreHeater, Summer Bi-Pass and Open Fire Program. Accessing the Status menu for the super dependable Zehnder CA series.

[@Williams-wd7cn]

Hello I'm an HVAC tech over in Virginia and we are working on the exact same unit and I had some questions about the unit like when we wired it up we went to the comfo sense and tried changing the language but nothing happend

[@PassiveHouseCody]

Try and reference this manual on the language change. www.zehnderamerica.com/wp-content/uploads/2014/11/ComfoSense-Controller.pdf