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Steam Leaving Supply Valves?
I am suspecting that I have steam escaping from my Mouat radiator supply valves. Here's the evidence:
1) I am using several gallons of water a day
2) Prior to the weather getting very cold I serviced all of my radiator valves by taking the handle off and then making sure they were able to be opened all the way. Previously an installer or servicer of the system used the Mouat valves external rotatable disk to only allow the home owner a small amount of movement of the valve handle. In an attempt to get steam to fill radiators more quickly I made it so all the valves could be wide open.
3) Since that time I have been trying to balance the system using the Mouat orifice valves. Since none of the traps are working I am hoping to get the orifices open just enough to let the radiator fill about 90% with steam on the longest burner cycle (about 25 minutes).
4) Since this winter has been much colder than others, and I am keeping the house warmer than other years too, I can't say for certain that my servicing of the valves caused any problems - but it seems too coincidental to not be the case
5) Last night I used the valve handles to restrict the orifices of two radiators in my bedroom. The room stayed at the correct temperature, but the traps did not feel like they were seeing steam as they were not as hot as they had been in previous runs.
6) The sound of the steam entering those two bedroom radiators was significantly different. This could be because the orifice was smaller.
7) I used about twice as much water last night as I had previous nights. Yes it was very cold, but I do not believe the boiler could have run too much longer than any other previous night with the CPH set to 1 and cycles being very consistent at 25 minutes before cut out from vaporstat.
Q1) How likely is it that moving the handles on the valves to allow more or less steam into the radiator is causing more or less steam to find an avenue out of the valve and into the open air of the house?
Q2) Is there any test that I can run to see if steam is in fact leaving the system through holes in the radiator valve? (cold metal pot held over the valve for a few minutes and see if there is condensate inside?)
Q3) If we assume that there is no crack in the boiler are the valves the next logical place to look for leaks? Where else should I be looking?