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Help! I have no main vents! + problem radiator
Great site!! I've learned a lot about my steam system from reading on this site, so much that I've discovered some issues that I would like some help addressing from all the kind folks here on the Wall that have much more experience than I do.
Question/problem #1: My steam system is single pipe, and I just realized that I have no Main Vents on it!!! So the rads in the house are effectively venting not just the air in them but the air in the Mains as well (which I know from this site is not very good). I've attached a diagram of the Main Vents + pictures of the end of each Main ("left & "right") with proposed Main Vent install placements. Since the left main is a fairly short one - would I be okay with just a Gordon #1 there and then a Gordon #2 on the "right" main since that pipe is about 32 feet in total? Main Steam line piping is 2" I think if that helps.
Question/problem #2: I have a fairly big radiator placed pretty far from the boiler that doesn't get "hot" unless I bring up the house temp about 10 degrees (so working the boiler for more than a few minutes). I usually have the thermostat set at 67 - and when it gets to 66 and the boiler starts firing the radiator in the family room doesn't even get warm (the supply line to it is only hot for about 1-2 feet). The family room radiator has a vari-valve (heat timer) on it in the full open position so i know venting capacity is not an issue - but I am suspecting that since the other radiators on the first floor also have vari-valve vents (in various "mid" to "closed") positions that they may be part of the problem as they hog all the steam and the thermostat reaches the shut-off point before the boiler has been on long enough to create enough steam that can get to the family room radiator. I was thinking about getting some Gordon #4 and #5's on the radiators on the same floor as the family room radiator....but should I DO ANYTHING before I install Main Vents? Any suggestions here would be appreciated.
Question #3: The boiler is currently connected to a White Rogers 1F80-361 in our eat in kitchen - We would actually like to use that wall space and since we got a Honeywell PRO 4000 thermostat in the hallway between our "old" part of the house and the new family room which has that troublesome radiator in the back (we expanded our house last year and now have zoned AC - so the PRO 4000 is only used for cooling the first floor today). Would there be any issue to connect the boiler to the PRO 4000 thermostat (as it is actually much better placed with no radiators right by it)?
Thanks for any insight/help!