boilers are the most preferred boiler in the UK because they come with high
efficiency, energy, compact size and premium performance.
Combi boilers provide energy efficient hot water due
to two main reasons. Firstly the boiler has very high operating efficiency and
secondly they have the low internal power. In simple words, this means that in
summers when you don’t need the space heating, you will only be paying for the
heat required for hot water as per your domestic demands.
is a combi boiler?
Mainly there are three types of boilers: regular
boiler, system boiler and combination boiler. Combination boilers also known as
combi boilers are very popular in homes because with saving space they provide
the pleasure of saving money as well to their customers. A combi boiler is a
compact, efficient boiler that provides heat and hot water to small homes
mainly. They work with both hot water cylinders and central heating boilers and
are so compact that it could be hung on the wall. Thus saves the space.
is expansion vessel?
need an expansion vessel with them. Also known as the expansion tank, this element
helps for the proper pressure in the system. The expansion vessel handles the
expansion and contraction of the water of the boiler as it heats and cools
down. If this elements stop functioning properly than it can lead your system
fluctuate a lot. Your system will not work properly after that. Resulting of no
heating and hot water until the problem doesn’t get sorted.
So it is very important to maintain the expansion
vessel and to recharge it timely.
Now the question arises how to recharge expansion
vessel on combi boiler? But first we should know what pressure an expansion
level should be set to? Let’s find it out
The compressed air in the expansion tank should be
at a suitable pressure. Usually the pressure is one bar, but for more knowledge
you can take the help of your boiler manual.
However you need to push down the Schrader Valve to
check the pressure in the vessel. Remember you need to hear the air escaping.
If you don’t then there is no pressure. Also draining and recharging the vessel
is the important function of the boiler process.
to recharge expansion vessel on combi boiler?
Recharge expansion level is also known as
re-pressurizes the expansion tank. If you think you need to recharge your
expansion level, you need to follow the following steps:
switch off your boiler and remove the fuse.
off the extra pressure
the pressure of the compressed air in the vessel. You can check it with any
pressure gauge. If the pressure turns out to be low then recharge it with any
air pump and attachment.
sure that Schrader valve is not losing the air.
can check it with putting some washing liquid over it. If the bubbles get
formed in the liquid, then you need a replacement valve.
you need to check and re-pressurize the central heating system and may also
have to bleed the radiators and recharge the pressure on the central heating
the expansion tank works?
tank can contain the water and air together. As the water heats up it expands
the tank. On the other hand the air compresses it. In this way it maintains the
system stable by absorbing the extra pressure. Mostly the expansion tank is
situated within the casing of the boilers making it invisible for the users.
you find you have other problem with the expansion vessel, do not try to work
and repair it by yourself. This can cause a severe damage to your boiler