Let me make sure I understand properly and have the correct procedure down for when I need to do this.
Right now, the red light on my low water cut off is off, so I don't need to do anything.
every 30 - 60 days, I should open the knobs a quarter turn, drain a little water to see if the level in the glass goes down. I'd imagine that I should turn off the heat and let the boiler cool before doing this.
Otherwise, when the light goes on, after letting the boiler cool (I know that cold water+hot boiler = bad ), I should turn both knobs about a 1/4 turn open. that will show me the water level. Then, use the water feed into the boiler to fill it and when the sight glass is at an acceptable level, stop the water, close the knobs on the sight glass and turn the heat back on.
Is that correct, or am I missing a step.
Thank you for your patients, I just don't want to do something to mess up a very expensive part of my home.