Recent content by bn friend

Can you send my a schematic diagram of the correct set up?

yes

NO controller for domestic water no water tank or heat exchanger. When hot water is used it goes to the house first never lacks water flow.

Pic 5 to the left runs to a mixing vale from the hot side for house water

If i understand hot water out run pump then first tee to the manifolds, Second tee get any return from manifold. The straight pipe goes back to cold water to heater. Do i need any check valves? What size pipe should be used for primary loop? i attached a plan where would domestic hot water and...

Thanks for the info when running one zone and one pump heat works fine. When running two pumps heat works but flow slows down. The fitter on the water heater is not clogged i have checked that last week. How to set up a primary loop? What is the best way to set up?

I understand its piped wrong. I don't know for sure if the heater has a pump but believe it does not. Attached are more pics. The check valves are going with the flow of water, are you referring to the lower check valve that feeds hot water? There is allso 2 check valves that return cold water...

The heater is Takagi T-H3 S-DV-P each manifold uses 2- Grundros 15-55 SF pump 3 speed The first manifold has has 5 loops 1/2 pex about 250' runs. The second manifold has 3 loops 1/2 pex with 250' runs. The heater is an open system sharing house hot water with floor heating. The temp is 120...

I just bought a house with radiant heat in New York the system runs off a Takagi propane open hot water heater. There are 2 manifolds with 2 pumps running with 1/2 pex piping. The system works fine if one pump runs, but if two pumps run the flow rate is very slow. I feel the pumps are not the...