What pressure should a Worcester boiler expansion vessel be?
between 1 and 1.5 bar
When the heating system is cool, the pressure should be between 1 and 1.5 bar on the pressure gauge (the indicator needle would usually be in the green section). If pressure is below 0.5 bar (down in the red section), water has been lost from the system and must be replaced.
How do I know if my expansion vessel is bad?
If water comes out of the valve you have a definite expansion vessel fault. In this case the vessel has definitely failed and must be replaced. If no water comes out but no air either, you have an expansion vessel fault but the diaphragm may still be intact and it may be possible to re-pressurise.
What should boiler pressure be when off?
between 1 and 1.5 bars
What pressure should my boiler be when the heating is off? Boiler pressure should generally be between 1 and 1.5 bars when central heating is turned off. The needle of the pressure gauge should remain above the lower limit set by your boiler manufacturer at all times.
Why does expansion vessel lose pressure?
If your boiler keeps losing pressure it could be from a failure in the expansion vessel. The expansion vessel is also known as an expansion tank. The expansion vessel prevents the boiler pressure relief valve, releasing water to reduce pressure, simply from the expansion caused by the hot water.
What happens when boiler pressure is too high?
If the boiler pressure is too high, there’s an increased chance of leaks developing in the system. But if boiler pressure is too low, the system won’t work as well. So keeping the correct boiler pressure is important to make sure that your system heats your home efficiently.
How do I check my boiler expansion tank pressure?
Once you completely open the valve, you can measure and note the pressure. You can also check your expansion tank’s pre-charge pressure by knocking on the side of the tank with your knuckles to determine if it’s full of air or water. Pre-charge pressure that’s too low may be indicated when the tank is full of water.
What is the function of a Worcester Bosch expansion vessel?
Worcester Bosch Expansion Vessels also sometimes called expansion tanks or pressure vessels are a component fitted internally to Worcester Bosch Combi type and sealed system boilers and it’s function is to compensate for the expansion of hot water, as water will expand when heated producing a rise in pressure within…
When was Worcester Bosch 35cdi II boiler installed?
We have a Worcester Bosch 35CDi II installed in September 2006 by the previous owner. It is a 2 storey house with the boiler located downstairs. We have Scottish Gas HomeCare 400.
When did Scottish Gas recommission the Worcester Bosch boiler?
The system was recommissioned with Hep2O barrier pipe upstairs, 4 new radiators (because the builders lost the old radiator brackets), new lockshields and new TRVs on 13th November 2010. The boiler was given an initial inspection by Scottish Gas on 19th November 2010. He checked the expansion vessel, electrical safety, gas emmision at the flue etc.