Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Outdoor Reset on a Buffer Tank?
Apologies as this is my first post here, so please excuse any cultural snafu's.
I've recently had a Navien mod/con combi-boiler plumbed in series with a 30G buffer tank to smooth the hydronic load for our relatively small zones in a new renovation.
We've had the outdoor reset module added to the Navien which modulates the temp according to the weather, but the buffer tank is controlled is a fixed aquastat with a manual temp. setpoint.
1. Does this negate all the savings from using ODR as the the buffer tank is getting heated to the same temp regardless of what's going on outside?
2. Couldn't it also lead to a situation during warmer weather where the boiler can't bring the buffer tank up to temp because it's output temp is below the buffer tank setpoint?
I'm still learning about all this stuff, but I haven't seen this type of topic covered anywhere before.
If these are problems, how can I get around them to ensure I get the efficiencies of ODR, realizing that the buffer tank is not all that quick to change to changes in outdoor temp?