Unvented Heating System Diagram

As unvented cylinders work from the power of the mains water supply the mains pressure and flow rate must be adequate.

Unvented heating system diagram.

The arrangement shown here is most likely for an existing y plan system where the cylinder is being changed to an unvented one. With unvented systems there is no need for a cold storage tank which helps free up space and requires much less pipework. Supply pressure should be around 2 bars and able to supply the required flow rates. A guide to the different ways of heating domestic hot water so you can identify problems and faults with the hot water tank or central heating system and carry out any maintenance needed.

For an entirely new installation s plan would be a far better choice as that does not have the default open problem and also allows the use of multiple zones for the central heating. This first is a combi boiler system where the boiler directly heats the water on demand. Visit the unvented cylinder page on our interactive house for comprehensive information on unvented hot water systems. The s plan is popular because it is versatile you can add an unlimited number of zones simple to wire and easy to fault find on.

S plan heating systems are now the most common type of system installed in the uk after combination boiler systems which do not have any external motorised valves. 668f megaflo piping diagram wiring resources doent 36 00 5690 issue 4 installation manual ing and using cl250 fh 9133 y plan heating with unvented cylinder 2 port valve s central system heatrae sadia systemfit mk6 diagrams 668f megaflo piping diagram wiring resources doent 36 00 5690 issue 4 megaflo installation manual ing and using megaflo cl250 manual read more.