S
Solid Fuel
Hi
Question on how best to design/solve back flow in a Solid Fuel Primary circuit. This is happening when the fire is not lighting and the oil fired boiler is operating into the common dual coil copper cylinder causing the idle stove coil to heat and thus starting back-flow in its circuit drawing out the heat generated eventually cooling down the cylinders hot water.
Pls see attached for basic current layout.
System is operating in bungalow house.
Thanks for any feedback
View attachment Primary Circuit.zip