Jargon Buster - T
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A device, as in a home heating system, that automatically responds to temperature changes and activates switches controlling the equipment.
Temperature pressure relief valve (TPV)
A component that discharges water from a cylinder at a temperature of 90-95 degrees Celsius.
Thermostatic radiator valve (TRV)
Sense the air temperature around them and regulate the flow of water through the radiator which they are fitted to. They do not control the boiler.
A time clock has a dial. Around the edge of the dial, matching the hours of the day, are 'pins' that you can push in or out. These pins tell the system to turn on or off during the times you have selected.
Timers and programmers
Timers switch the system on and off at set times of the day. Programmers offer a larger number of on-off programmes, giving the consumer greater flexibility and control.
If your radiators or heating system seem to be making a noise then it may mean that there is air trapped somewhere. Air commonly gathers in the upstairs radiators. This air can be easily removed by bleeding the radiators.
Two-pipe (vented) system
A heating system that transmits heat quickly and directly to all radiators in the circuit, raising them all to the same temperature. The flow of water through each radiator on this type of system must be regulated to achieve an average temperature to each heat emitter.