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Story of Chief Big Boiler and Cousin Little Pipe
Details of the system (and previous attempts at fixing things) can be found in the attached thread.
That said, after performing all of the following:
-capping the return lines which were piped incorrectly,
-skimming the boiler,
-installing main vents,
-replacing & putting multiple vents on some of the radiators,
-adjusting radiator pitch,
-changing some supply valves,
-setting the thermostat's Heat Rate Cycle to 1,
-adding a vaporstat with a low pressure gauge, and (running between .5 - 1.5 for now)
- adding insulation to the near-boiler piping
I have the system to the point where the noise level doesn't startle the neighborhood too much anymore. That said, its not without sacrifices:
- the kitchen radiator still clanks viciously. No effort was able to overcome the mis-sized (3/4") runout to it (... and possibly badly pitched as well). Good thing its furthest room from the bedrooms
- I have to keep the supply valve shut for a bathroom radiator due to the same reason, adding to the oversized boiler issue i have to begin with. (55,410.14 needed vs. 145,000 that the Weil-Mclain EG-50 provides)
- short cycling still occurs, especially during recovery mode since I keep it cold at night.
While i try to find alternate solutions to the short cycling, in regard to the clanking, i read somewhere that, given the narrow size of the pipe, venting the radiator vvvvery slowly theoretically might help a bit. The give & take there is that is a radiator that is further away so if things were ideal, preference would be to vent it a bit quicker.
any thoughts? Given the flaws with the system anything i do is essentially a patch/workaround until i'm prepared to break open the walls and re-pipe.