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Tuesday, 13-Aug-2013 15:41 Email | Share | Bookmark
Central Heating Balancing Radiators

In order to guarantee an even circulation of hot water to the radiators in a system, you'll have to "balance the system". Frequently, the radiators near the boiler/pump would tend to be warmer than the radiators further away, balancing the system will even out the flow of the hot water.

To do this we use the lockshield valve which is normally concealed under a push on cover at one end of the radiator. Adjusting these valves will regulate the flow of water to the radiator. By partially closing the valves, flow to the radiators nearest the boiler can be more restricted than to those further away. To lower the water temperature at the outlet pipe, the lock shield is closed to increase the temperature when the valve is opened up.

The idea is to get the temperature drop across each radiator to be about 12 C (20 F). The simplest way to determine the temperature drop across the radiators is to use a set of radiator thermometers. These clamp-on thermometers have springs which hook around the inlet and outlet pipes of a radiator. They can be discovered at any DIY store.

Before you begin, make sure the system is shut off and let the water cool down.

Open the lock shield valve and the control valve making use of an adjustable spanner. This is the valve you make use of to turn the radiator on and off.

Fit the radiator thermometers to the inlet and outlet pipes of the radiator which is nearest to the boiler, and switch the heating back on.

Close the lockshield valve on the first radiator to almost closed, as the temperature level of the systems comes up, gradually open the valve until the temperature difference between the 2 radiator thermometers is about 12 degrees C (20 F).

Relocate the thermometers to the next radiator away from the boiler. Shut the lockshield valve and adjust it until the temperature difference rises to about 12 degrees C (the temperature difference will probably begin at less than 12 degrees as both valves are totally open).

If you repeat this for all of them in order, you ought to have a well balanced system so that all radiators heat up successfully.

Once the radiators in a system have been balanced, the valves should not have to be adjusted again, unless the radiators or the pipes are changed.Phoenix Arizona Heating Repair\nPhoenix AZ Heating Repair


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