Philthechill
New Member
Hi guys, we are in our new house. 2400 sqft two story with 4 bedrooms upstairs and one in the basement. 3.5 bath. We have a Lochinvar Epic Fire Tube Boiler – 80,000 BTU model. It supplies a 40 gallon tiger tank for dhw. And also heats infloor in the basement. About 867sqft in the basement is being heated. Our problem is that sometimes when we have showers if we have more than one shower running or my wife has a bath and a shower is running, the boiler doesn’t seem to keep up. The tiger tank drops to 40 Celsius when the set point is 60 Celsius. It then sits at that point until the hot water has been shut off and the boiler then heats up the tank to 60 Celsius. It seems like the boiler can keep up if it starts heating to 100% right away. But it almost seems like it if there is a call for space heat, that the boiler doesn’t cancel it when it calls for dhw. I’ve went through the settings as well as my plumber did and we can not find a setting for prioritizing dhw even if there is a call for space heat. All I could find was the switching times. Which were set at 30 mins from dhw>sh and 30 mins from sh>dhw. I since switched them to 4 mins for dhw>sh and 2 mins for sh>dhw. Do I need to drop the time for sh>dhw or do I need to change another setting that we can’t find.
