Posted by jtown on July 19, 2001 at 10:37:20:
In Reply to: Re: Bleeding the system posted by Dominic on July 19, 2001 at 09:24:42:
The PRV should be the first fitting in the line bringing water to the heating system. It will have a little adjusting screw at the end of a tubular chamber for the spring that comes out of the saucer shaped chamber for the diaphragm. There may be a "rapid-fill lever" on it or a by-pass around it, to enable filling the system. The normal fill hole is quite small to keep from adding too much in normal operation. It can take hours to fill it with the normal orifice and you might not hear noise, as in yours may be ok. You have to go back and forth and bleed air at all the bleeders and adding water until you've chased all the air out. Then run the boiler for an hr or two to get oxygen out of the water.