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Posted by jtown on December 16, 2003 at 15:19:22:
In Reply to: Cold radiators, pressure question posted by George Walsh on December 16, 2003 at 08:55:09:
Possibly. Partly as it will let the pressure be high longer with longer firing. But it would be to overcome some other shortcoming. Check vents on the ends of the mains in the cellar. While there look for anything common to the two radiators. Check pitch of runouts to the radiators for water blockage. Removing the vent on the cool radiator would eliminate that vent. Keep the vent in your hand until you are steaming and replace it so you don't wreck that room. The disc may have come loose in the radiator valve to cause it to need more time. Compare the installed radiation EDR with the boiler rating. If the boiler is way too big it may be cutting out too soon to allow steam to distribute. But, steam moves fast, air doesn't get out fast enough usually. Steam vents must be mounted into the lower boss on the radiator. The top one is for water usage. The air vent may be sticking now and then. Put a new one from a working radiator on the bad ones.
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