I have a gas powered steam radiator heating system with 8 radiators in the entire house. I replaced my old heating boiler with Crown Bsi138enpzzpsu 138K BTU which is way too powerful for my house.
My boiler short cycles for these 2 reasons.
- The boiler gets too low on water if I start with water level slightly more than half on the sight glass tube. Boiler runs fine for a while until it gets low on water - I think boiler is powerful enough to push water up into the pipe. After low water cutoff is hit, it shuts down for a few seconds until water level reaches back up. Also, some time this doesn't happen fast enough and boiler gets over filled because the auto feeder kicks in before all the water gets back into the boiler. Eventually, boiler gets overfilled after a few days of operation.
- I noticed that once my boiler gets overfilled with water, it kind of masks the issue with low water cut-off being hit. However, now it short cycles because of pressuretrol being hit after certain pressure is reached in system.
Here are my questions (Info on any of these would help me):
- I do not like the option 2 - i.e. using overfilled boiler - but I am not sure if there is any risk associated with using overfilled boiler. Could it cause boiler to explode?
- I have good air vent (Hoffman 1A, 1/8" Adjustable Angle Steam Radiator Air Valve) installed with fastest vent setting on the radiator in the room with the thermostat. I think this vent opens up after a certain pressure builds in the system. Would it help if I install similar vent in other radiators as well to reduce the pressure in system?
- What is my option to solve the issue with overly powerful boiler.