u/DonutGaurdian

I cant seem to figure out how to add water to my boiler. Every video I've seen online makes it look easy and simple but I can't find anything about doing it on this boiler. Looking through the manual hasn't seemed to be much help to me either. Any ideas would help. My HVAC guy was working in another town the last week and the house has been very cold. I was just hoping I could take care of this without making him run all the way out to me.