Heating-beta2019

heating-beta-2019

https://www.builditsolar.com/Projects/SpaceHeating/Manual_of_Modern_Hydronics_Appendix.pdf

questions

narrative

• The idea here is that for both the radiant and the baseboard sections operate similarly and independently. Whenever anywhere else calls for heat that(those) zonevalve(s) open(s) and the bypass zonevalve closes. Threeway valves don't seem to be a good idea in cases where there are more than one alternative path.
• Balancing for radiant and baseboard sections would be accomplished statically using ball valves. For these sections balancing only matters when more than one alternative paths are activated at the same time. Lets say the front door section(fr) and first floor bath(ba1) are both calling for heat. Balancing to favor ba1 would leave ba1's ball valve open and fr's zone valve would be closed a bit to send more heat to ba1. Then you would redo the exercise with all three (fr, ba1 and ba2) calling for heat.

questions

• important to have 2 way zones instead of 3 (tob)
• Still has to be balanced (tob)
• re narrative: Is that the balancing you mean?

• The idea is based on not having to have a manifold balanced or additional back pressure from balancing zone valves when only one zone is open, at lest for the baseboard rooms. This drawing includes azone for the living room which I think should be included so as to not need modifications in the future. I think I will keep the lines going to/form the FP-exchanger in Pex so that it is more flexible or that can be an upgrade once I have more soldering experience. I am going add drain valves for flushing the heater as well.

Considerations

• Thinking of using shark-bite fittings (https://www.homedepot.com/p/SharkBite-3-4-in-Push-to-Connect-x-FIP-Brass-Adapter-Fitting-U088LFA/202270501) to make the connections to pex so that I can take it apart easier if i need to.
• Still trying to understand what is necessary on this system with regard to expansion tank/backflowpreventer/dirttrap/airseparator
• I'm going to work on a shopping list based on this drawing. Send feedback.

• I realized that the mixing valve wont work unless there is a pump on the other side of it. May have to control for temperature another way.
• I may have to rearrange the valve layout if the normally closed outlet is not always on the same side.
• I moved the solar input to be in front of the first loads.
• All valves are included except the elbows and reducing Tees/Sharkbite pieces. If I order tomorrow I can get almost everything on the day after Christmas.