Forgive me for any confusion. I'm having trouble formulating a comprehensive, clear question. This Steam Boiler is more than 25 years old.
It is a Peerless 120K Boiler model G-560-w-s.
The water level in the sight glass keeps rising. I find myself draining water
rather than filling it. To my knowledge, water is fed to the system manually.
When the system is off, the water level is above the marker. I use the spigot valve at the base of the furnace to lower the water level to about 2/3 full. The next day or so, the cold water level increases and I have to release more water. When the furnace is running, the water level goes above the marker and bounces near the top of the site glass. A couple of events took place that may be relevant. First, I drained alot of water 2 weeks ago and re-filled the boiler. Shortly thereafter the system flooded with water spilled on the floors upstairs. One radiator stopped working so I removed it, blew air down, removed the dry return pipes and cleared the sediment. Second, out of the 9 radiators in the system, there are about 3 turned completely off.
In addition, there is a big gray thing on the side of the furnace with a big yellow lever and an open pipe coming down, I would assume that this is for "blowing down". This lever does nothing, I have to use the spigot on the very bottom of the furnace to release water. Is this system screwed up?
If I fill the site glass 2/3 of the way up, why does it keep increasing it's level when cold? Is it bad that the operating water level raises all the way to the top of the site glass? Thanks, Jerome