Hello,
I was hoping someone could help me out with a problem I'm having with my boiler. I just had a Navien tankless combination unit installed, and I'm having trouble getting sufficient heat to all parts of the house. I have three zones in my house, one for the kitchen and four season room (zone 1), one for the main floor (zone 2), and one for the newly added second floor (zone 3). We've just finished renovating a previously unfinished attic and installed baseboard heat up there. Everything was working fine in the other two zones, but as soon as we added zone 3 into the mix the other two zones couldn't hit their target temperatures. I've attached a picture of the plumbing as well as a schematic, as it's a bit hard to see all the piping in the pic. The supply line hits zone 3 first (upstairs), then zone 2 (main floor) and finally zone 1 (kitchen/four season). In terms of performance, the upstairs gets heat fine, the main floor is about 3 degrees below target and finally the kitchen/four season is about 6 degrees below target. There seems to be a relationship between the order of the zones and the heating capability. When I isolate the upstairs (zone 3), everything works fine again in zones 1 and 2. Based on the picture and schematic, is there a problem with how this is plumbed? Would that be the reason I can't make the target temps? Any help/advice would be appreciated.
Thanks.
I was hoping someone could help me out with a problem I'm having with my boiler. I just had a Navien tankless combination unit installed, and I'm having trouble getting sufficient heat to all parts of the house. I have three zones in my house, one for the kitchen and four season room (zone 1), one for the main floor (zone 2), and one for the newly added second floor (zone 3). We've just finished renovating a previously unfinished attic and installed baseboard heat up there. Everything was working fine in the other two zones, but as soon as we added zone 3 into the mix the other two zones couldn't hit their target temperatures. I've attached a picture of the plumbing as well as a schematic, as it's a bit hard to see all the piping in the pic. The supply line hits zone 3 first (upstairs), then zone 2 (main floor) and finally zone 1 (kitchen/four season). In terms of performance, the upstairs gets heat fine, the main floor is about 3 degrees below target and finally the kitchen/four season is about 6 degrees below target. There seems to be a relationship between the order of the zones and the heating capability. When I isolate the upstairs (zone 3), everything works fine again in zones 1 and 2. Based on the picture and schematic, is there a problem with how this is plumbed? Would that be the reason I can't make the target temps? Any help/advice would be appreciated.
Thanks.