A short story for you!
I built my house 5 years ago and payed a hvac contractor good money to design/layout and install my radiant heat system.
I have many issue with it in this short time. No air vent installed resulting in cold zones. Undersized pumps. Undersized piping (my opion). Ghost flow overheating due to no check valves. Cheap mixing valve to trying to control 1200sqft of 6" slab and 1200sqft of thin slab.
I have now installed solar panels and would like to integrate it with my current system. I am looking at completly redesigning the mechanical room plumbing to achieve this. I would like to try and use as many of the existing componets as possible.
I have 1 baseboard loop, 1 thin slab with 5 loops 280' 1/2 pex, 1 6" slab with 5 loops 280' 1/2 pex
1 propane DHWT with internal HE
2 dual coil solar storage tanks
3 taco 005 pumps
1 taco 008
1 taco 010
2 motorised ccv mixing valves (7.4cv)
I have on order a spirovent mirco bubble air eliminator and etx-30 expansion tank.
CV1 will be outdoor reset valve
CV2 will be a divert valve that will divert solar injected heat around heat tank if the temp is higher then requested by the floors.
Solar pump will only run if (1) store temp is greater then floor return (2) one of the 2 slab pumps must be running.
Will this work or can someone please sketch out how it should be done?
I have lots of control equipment and can manage that as long as I understand the theory behind the design.
I do not want to inject hot water with a circ pump
Solar is closed loop
Radiant is closed loop
I have 2 ways I have drawn it but not sure if they are the "best" way.
What would you charge for mechanical room layout?