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1 pipe radiators wont heat

Grega
Grega Member Posts: 20
in Strictly Steam
I have a 1 pipe sytstem that ony one apartment seems to have trouble heating. The thermostat was recently moved to another apartment. The vents are non vacum and are all new and set to vent fast. The valves on the radiators are opened all the way (pulled and checked). The rest of the apartments upper and lower are all fine. The main vent has been replaced with no change. If i leave the system running long enough (stat turned up very high) the radiators will get hot but it takes quite awhile. Boiler pressure set 4psi. Utica Boiler 406BI, 175,000in, Natural gas fired.  Any thoughts?

Comments

  • Steve_175
    Steve_175 Member Posts: 238
    More info

    How many floors and how many units in this building? You say the main vent was replaced. That does not mean that it is enough venting. What diameter and lengths are your mains? Show some pics of your near boiler piping and if possible a drawing of the lay out of the building and pipes.

    BTW the pressure should be turned down below 2psi.

    You should vent the mains fats and the rads slow.



    http://www.gwgillplumbingandheating.com/webapp/GetPage?pid=415
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