Unvented Heating System Diagram

Visit the unvented cylinder page on our interactive house for comprehensive information on unvented hot water systems.

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. 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. Supply pressure should be around 2 bars and able to supply the required flow rates. This first is a combi boiler system where the boiler directly heats the water on demand.

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. The arrangement shown here is most likely for an existing y plan system where the cylinder is being changed to an unvented one. 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. There are three types of domestic hot water system.

With unvented systems there is no need for a cold storage tank which helps free up space and requires much less pipework. Unvented hot water systems.