Combi Boiler Central Heating System Diagram

Combi boilers heat water directly from the mains when you turn on a tap so you won t need a hot water storage cylinder or a cold water storage tank in the roof space.

Combi boiler central heating system diagram.

How a combi boiler works at least a modern combi boiler is. This diagram illustrates how simple the heating system connected to a combi boiler is. Central heating system diagram with high pressure boiler this type of system operates at mains water pressure and uses a stored hot water system. A primary heat exchanger.

For domestic hot water the mains supply is fed direct to the boiler. Secondary plate heat exchanger. Combination boilers have no tanks at all. Instead they heat water for central heating and domestic hot water as required.

In direct contrast open vent also called regular standard or conventional boilers and system boilers heat water that s stored in a tank. Central heating wiring diagrams baxi system 818 824 installation and servicing boiler overheating diynot forums doent duo tec combi 24 28 33 40 erp service manual nest thermostat 105e solo pf 2 60 diagram earlier applia help with centre central heating wiring diagrams baxi system 818 824 installation and servicing baxi boiler overheating diynot forums doent baxi duo read more. A combination or combi boiler is both a high efficiency water heater and a central heating boiler in a single compact unit. No external pump no tanks no external expansion vessel no motorised valves and in many cases item 6 is not needed either.

An automatic bypass valve is fitted inside most combi boilers by the manufacturer these days. So if it is lashings of hot water at a forceful pressure you are looking for then this is the system for you.