crater
New Member
- Messages
- 49
- Reaction score
- 0
- Points
- 0
yes, I will have a electric heat pump (Geo Thermal) for forced air, the electric rates here are on a 3 tier level, can't remember at what usage the rates drop, but HVAC man said that because of the rate drop electric would be the way to go for the Geo system. Hence the electric boiler, it just made sence that if the Geo was going to get me into the lowest rate alone, then the boiler draw on electric would be at the lowest rate also. And the only gas bill would be for running a cooktop, and gas water heater that is tied to the geo unit. The Geo unit will produce around 90-100degree water then all the gas water heater has to do is raise that temp to 120degrees, not to far of a raise so it shouldn't cost very much to run. Plus I also have a electric water heater that is the "storage tank" for the geo unit, one element will be shut off in it so it will raise the temp from 90/100 to say 110 then into the gas to finish it off. And before you ask, YES this system was professionally designed by my HVAC guy, in hindsight I should have asked him about a design for the in-floor system.
Anyway I have installed a couple more temp gauges in the system that work this time (there as close to the flow as possible) I now know that I have a supply of fluid @ 95degrees and a return @65 degrees, so there's a 30 degree Delta-T, but I had to choke down the return line by 1/2 to get the temp up that far. I choked it down by shutting the return ball valve half way on the return manifold.
BTY the 1/2" line that is on the left in that pic is the bypass, i now know that by just doing that (linking the supply to the return) won't really work without a pump, however it does help get the temp up so some hot water must be getting through.Anyway in this round of testing I have it shut off so that I can really tell whats kind of temp I can return through the 6 loops.
Now I'll wait for morning and check the delta-t again hopefully it's higher along with the supply temp. I'll check in approx 10hrs this would have given it 12 full hrs at full bore, I know it will take longer, but I would think I should see some change in 12hrs.
Anyway I have installed a couple more temp gauges in the system that work this time (there as close to the flow as possible) I now know that I have a supply of fluid @ 95degrees and a return @65 degrees, so there's a 30 degree Delta-T, but I had to choke down the return line by 1/2 to get the temp up that far. I choked it down by shutting the return ball valve half way on the return manifold.
BTY the 1/2" line that is on the left in that pic is the bypass, i now know that by just doing that (linking the supply to the return) won't really work without a pump, however it does help get the temp up so some hot water must be getting through.Anyway in this round of testing I have it shut off so that I can really tell whats kind of temp I can return through the 6 loops.
Now I'll wait for morning and check the delta-t again hopefully it's higher along with the supply temp. I'll check in approx 10hrs this would have given it 12 full hrs at full bore, I know it will take longer, but I would think I should see some change in 12hrs.
Last edited: