Hi,
I have a Navien NCB-180 boiler and it is not reaching the set point temperature. I am currently getting a supply temperature of 169F and a return of 154F while the set point is at 180F. This is the third heating season we are using it, and I hadn't noticed if this was happening before, but we are having a cold snap now and it is having problems keeping the house warm. I checked to see if it was being limited by the exhaust temperature limit dip switch but the dip switch is set to ignore the exhaust temperature. I have a 1600 sq ft. house in CT, where the temperature has been getting down to 0F at night. Is the boiler simply undersized for this kind of demand or should I look for other problems?
Thanks
Luke
I have a Navien NCB-180 boiler and it is not reaching the set point temperature. I am currently getting a supply temperature of 169F and a return of 154F while the set point is at 180F. This is the third heating season we are using it, and I hadn't noticed if this was happening before, but we are having a cold snap now and it is having problems keeping the house warm. I checked to see if it was being limited by the exhaust temperature limit dip switch but the dip switch is set to ignore the exhaust temperature. I have a 1600 sq ft. house in CT, where the temperature has been getting down to 0F at night. Is the boiler simply undersized for this kind of demand or should I look for other problems?
Thanks
Luke