2 pipe steam system

nick z.

I have asked about this before but now I have more info. System is a 2 pipe staem with only 1 main vent in the cellar.(vapor/vacuum?)The boiler is a EFM coal/oil combo. Custmer complained of house not heating properly when they use oil,and very high oil cunsomption.House did heat well on coal, but not all rads in the 2nd floor would get hot.
I went ther today to find the water level was VERY high. I drained for a about 5-10 mins before I could even see water in sight glass.Water was also very dirty. I skimmed the boiler until the water was clear. and replaced the fill valve. The t-stat wire runs into a RA89 which calls for .2 on the t-stat setting. T-stat was actually set on .6 I changed to .2. I fired it up on oil and the water turned a little dirty again(not as bad as before I skimmed it.)and the water bounced a lil in the glass.(about 1/4 inch)In no time the house went from 62 to 68 and all the rads were warm.Is ther anything eles I should do? I did measure all the radiators and am thinking I should calculat the load of them and size the oil nozzle to match. What do you think? Thanks Nick

Unknown

Right

and add to that nozzle size for the pick-up losses of the system, about 1/3.

It might become dirty again in a few days, they sometimes do.

Here's a picture of a boiler with clean water followed by one with a couple spoonfuls of cooking oil in it.

Noel

Unknown

and the oily water

Same boiler. No kidding.

Noel