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Surging, boiler just washed down
Water wanded the boiler, used the arm & hammer super soda, performed the skim. Not much at all but milky water came out then clear. Basically the water wand had knocked most of the stuff loose.
The sight glass is all over the place. While the boiler cycles, the water can climb over the sight glass, and drop to the fill level. While it's not doing that, it wanders up and down about 1" through the entire cycle.
I had lowered the pressures as low as they could go on the pressuretrol. Boiler cuts out at 2.6psig, cuts in at 1.1 psig. Now, it has a completely oversized vacuum condensate pump on the return. This is what I originally had attributed the flooding to. Now I'm not sure thats the only reason this puppy has a wandering water line.
I will due a litmus test next visit to check the ph, any other ideas to find out whats going on here?
I also have another kinda concern. every radiator on the loop has a control valve, 4 zones are multiple radiators on zone valves (like 2 to 4 radiators who's supply is closed when stat satisfies). I need to figure out an effective way to see of I'm getting severe vacuum on the supply side, or induced vacuum when a large zone opens when it holds a vacuum from being closed/off. Any thoughts here?