whistlenut wrote:Was this system working well when fired on oil? It is baffling that a simple boiler addition causes this kind of a problem. That K6 will blow you out of the house with capacity, so something is just plain NOT RIGHT! Can you scratch a flow diagram for us, please. Also is this a primary, secondary setup? Somehow something simple is being overlooked. I didn't read all the early posts, but if we go back to the KISS principal, we WILL find the answer, quickly. I assume this must be a 007 or similar circ, so why is there any consideration of flow being reduced? Are you sure something stupid, like a washer, piece of solder, a piece that plugs up something did not get inside the piping? I HAVE seem this, and no amount of formula crunching will resolve that one!!!! Understand that Einstein probably did not do the sweating, fitting or checking before this was installed. We ALWAYS check pipe just in case some idiot stuffed a piece of stryfoam in the end of the pipe at the warehouse....candy wrappers, ciggy packs......it happens every day....and these idiots reproduce...and vote. Ever stuff a potato into an exhaust pipe of 'a friend' back in the day? You get the idea. Those problems are much harder to resolve.
Reminds me of one of my jobs where a pipefitter left a rag in a 8" pipe. Even the pros make mistakes.