Where is the expansion vessel on a combi boiler?

Expansion vessels, also known as expansion tanks, keep the pressure in a combi boiler stable while water heats and cools. They are typically located inside the boiler casing. The typical pressure a boiler system should be set to is 1 bar.

What pressure should a expansion vessel be set at?

Some important things to consider is the air pressure inside the expansion vessel. It rarely needs to be anything more than 1.5 bar in most domestic properties. Anything more and the water may not expand into the air at the required time and could risk the high pressure relief valve opening or worse.

How do I reset my main Combi 24?

Turn the selector switch fully anti-clockwise against the spring pressure to the ‘Reset’ position and hold for at least 2 seconds. If this occurs repeatedly contact your Installer or Service Engineer. If the boiler does not relight after resetting it is possible that the flue has overheated.

What is a 24 he combi boiler?

The Main Combi 24 HE is a fully automatic gas fired wall mounted condensing combination boiler. It is room sealed and fan assisted, and will serve central heating and mains fed domestic hot water. 2. The boiler is set to give a maximum output of 25.2 kW (condensing).

What is an expansion vessel on a combi boiler?

If you have a closed-water heating system in your home, such as a combi boiler, you will have an expansion vessel. Put simply, it acts as a kind of shock absorber, handling the expansion and contraction of water in your central heating system as it heats and cools.

Where is the Schrader valve on a combi boiler?

The vessel has a Schrader valve on the air side that allows for more air to be pumped in when necessary to maintain a suitable resistance to the expansion of the water. Where is the expansion vessel on a combi boiler? The location of your expansion vessel will depend on the type and model of boiler you have.

What type of flue can be used with combi 24 he?

Only a flue approved with the Main Combi 24 HE can be used. Flue Elbow Fig. 39 Inner Flue Support Bracket Fig. 38 Y Flue Waste Fig. 37 10.0 Installation