Combination boilers are becoming more and more popular as they do away with any water storage, less pipe work, constant instant hot water and very economical to run.
The installation consists of draining down the system, removal and disposal of old boiler, header, cold storage tanks, usually in the loft area, hot water cylinder, all unwanted pipe work, pump and relevant controls along with any unwanted electrical parts.
The incoming mains cold water supply will be connected to all cold water taps in the house giving full mains pressure throughout and also directly to the boiler to give your hot water increased pressure disposing of the need for booster pumps to showers and domestic hot water taps. Any booster pumps connected to your old system will have to be removed. New connections include gas pipe, central heating flow and return, new condense water drain and pressure release discharge pipe. A heating programmer can either be inserted in the front panel of the boiler or a combined room thermostat and programmer can be fitted on the wall using existing wiring from previous system, or if this is not possible a wireless model can be fitted.
STORAGE COMBINATION BOILER
These boilers have a built in storage of energy in the form of either domestic hot water or primary water (this is the water that the boiler heats up, which indirectly heats the domestic hot water giving the boiler more control over the temperature of the hot water) this enables the boiler to produce more hot water per minute which will be enough to supply two taps running at the same time, just as long as there is a good cold incoming supply. These units are larger than the standard boilers which could limit their location.
LEGEND
A: Central heating flow
B: Domestic hot water outlet
C: Gas inlet
D: Domestic hot water inlet
E: Central heating return