excessive air leaks in boiler or furnace; wrong fuel-air ratio; Stack Temperature. The "net stack temperature" is the difference between the flue gas inside the chimney and the room temperature outside the burner. Net stack temperatures above 700 o F (370 o C) are in general to high. Typical values are between 330 - 500 o F (160 - 260 o C). High stack temperatures may be caused by. undersized furnace
Ideally, when the boiler is on, the pressure should be between 1,5 to 2 bars, and when it's not working – 1 to 1.5 bars. Usually, safe levels of the pressure are marked in green, and too low or too high-pressure is marked in red. We consider high boiler pressure when …
Apr 28, 2021 · If you hear lots of air bubbling into the boiler and pipework, the diaphragm has almost certainly failed. You'll know for sure if you can't get the expansion vessel air chamber up to 0.75 bar. Remember, to test this properly you must leave the water drain cock open while you do this.
Apr 05, 2021 · Boiler pressure stays too high. If your boiler pressure stays too high despite water being drained out of the system via a drain cock, there is a fault. In this case you should check where the safety pipe from the 3 bar pressure relief valve dumps its water. This is usually directly outside through a wall or into an internal tun dish.
Boiler Pressure Too High? Here's How to Reduce it | My Plumber
Mar 12, 2014 · Once a boiler starts to go over 212°F, you can face serious problems. Watch out for overheating. If you notice that your boiler's temperature is going higher than the above settings, you have a major problem. If a boiler has reached 220°F, a sudden drop in pressure could cause the tank to burst. Overheating also is the main cause of leaking.
The combustion efficiency increases with increased excess air - until the heat loss in the excess air is larger than the heat provided by more efficient combustion. Typical excess air to achieve the highest possible efficiency for some common fuels: 5 - 10% for natural gas 5 - 20% for fuel oil
The Temperature in Your Boiler and the Dangers of