Paula Woodward
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newlec nlprtn
No idea how to programme my central heating control
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NEWLEC Nearly always used to,be Hörstman
West Sussex Heating
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For Combination boilers the heating controls are very modest. The hot water is not programed - it is immediately generated as soon as a tap is released. Typically there is only a programmer and a room thermostat, or a room thermostat with a programmer built into it.
For conventional and system boilers there are 3 forms of heating controls, gravity fed, 'Y' plan and 'S' plan.
Gravity fed systems is normally a pump that only pushes heat from the boiler around the radiator circuit when the room thermostat is demanding heat. The boiler must be 'on' for hot water on the programmer for this to occur. The cylinder is heated up by the gravity rise & fall of the boiler output, without the pump. New installations are not allowable to have this method and must be 'fully pumped' for both hot water and central heating.
'Y' plan systems consist of a 3 port valve (often referred to as a diverter valve) which switches hot water created in the boiler to either the indirect loop of the cylinder or the radiators, or when in 'mid position' it supplies both.
'S' plan systems consist of 2 or more 2 port valves (often called 'zone' valves) that let water to pass through them when the thermostat controlling them is requesting heat as well as the progammer being in the 'on' position.
Current part L building guidelines needs thermostatic radiator valves to be installed in the bedroom areas as a minimum necessity, and the system must have an auto bypass valve.
For conventional and system boilers there are 3 forms of heating controls, gravity fed, 'Y' plan and 'S' plan.
Gravity fed systems is normally a pump that only pushes heat from the boiler around the radiator circuit when the room thermostat is demanding heat. The boiler must be 'on' for hot water on the programmer for this to occur. The cylinder is heated up by the gravity rise & fall of the boiler output, without the pump. New installations are not allowable to have this method and must be 'fully pumped' for both hot water and central heating.
'Y' plan systems consist of a 3 port valve (often referred to as a diverter valve) which switches hot water created in the boiler to either the indirect loop of the cylinder or the radiators, or when in 'mid position' it supplies both.
'S' plan systems consist of 2 or more 2 port valves (often called 'zone' valves) that let water to pass through them when the thermostat controlling them is requesting heat as well as the progammer being in the 'on' position.
Current part L building guidelines needs thermostatic radiator valves to be installed in the bedroom areas as a minimum necessity, and the system must have an auto bypass valve.
Good to have a Heating Eng on the Forum .
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