Posted by Debra C on November 19, 2001 at 10:02:22:
CONFIGURATION OF SYSTEM: We have a three story split level house. We have several zones off our furnance: The highest is to the Master Bedroom, half a story lower is to the remaining bedrooms, half a story below that (1 story below the Master bedroom) are the kitchen and living room zones, half a story lower is the garage zone (1 story below the other bedrooms) and finally half a story lower (1 story below the kitchen and living room, 2 stories below the Master bedroom) is the basement zone.
This basement zone has been temporarily capped while we frame the basement and split the existing baseboard in two for two rooms instead of one.
There is a bleeder value after the feeds to the kitchen, basement, other bedroom, Master bedroom zone cutoffs. This bleeder value is before the feed to the garage zone cutoff.
On the return side, the garage feed is about two inches higher than the rest of the feeds. As a result, I am able to catch air in the garage zone when desired.
All other zones extend from the ceiling, return at the same height and flow into the furance. There is also an input line and a small pressure tank (about the size of a basketball) connected to the pipe that feeds into the furnace. Within the furnace, there is a bleeder where air will bubble out. The furnance is located in the basement.
Currently, most of the air is in the Master bedroom and Living room zones (but I'm sure by now there is air in all the zones).
PROBLEM: When we took the basement baseboard off the circuit, we introduced a lot of air. As a result, the Master bedroom zone is cold when the other zones are open. It is warm when it is the only zone open. Also there is a great deal of banging of the pipes, which indicates air in the line to me.
QUESTION: How do I bleed the air out of this baseboard system? Please note that the bleeder on the furnace is not enough when all zones are open. I would appreciate any help.