I have recently installed a room thermostat.(Tower RS).When activated the boiler only comes on for about a minute and then shuts off,therefore the room does not warm to the set temperature.It would appear to me that the thermostat warms up or senses a greater heat once activated than it actually is?I am not sure if this is a problem with the wiring or the thermostat itself?
Problem with room thermostat
- Thread starter BillyB
- Start date
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B
breezer
what connections have you in the stat and which ones did you connect to?
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B
breezer
i should say you you have it wired back to front still. in that it tells the boiler its warm enough when it isnt, still what happens if you turn the temp on the stat up, what does the boiler do?
you could also try turning the stat DOWN and see what it does
you could also try turning the stat DOWN and see what it does
Not familiar with a Tower RS. If it's a normal thing then I can't see a "backwards"way of connecting it which could make it do what yours is doing.
Do check the wiring though- sometimes the symbols are confusing. "Load" means the boiler (SwL) and a rectangle may mean a heater-resistor (goes to neutral).
It may have a resistor in there which heats the stat up to reduce the hysteresis (dead band). If you disconnect the neutral you will stop that heating up. Worth a try. The resistor is normally about 0.5 - 2 megohm, if you have a suitable meter to measure it (with everything disconnected).
If the thermostat is an electronic one, you don't connect a neutral.
What boiler is it? Some aren't designed for mains inputs at all!
While you're in there, check that Live and neutral aren't reversed on the boiler. (Neutral to earth should be approx zero volts, L to E approx 230)
Do check the wiring though- sometimes the symbols are confusing. "Load" means the boiler (SwL) and a rectangle may mean a heater-resistor (goes to neutral).
It may have a resistor in there which heats the stat up to reduce the hysteresis (dead band). If you disconnect the neutral you will stop that heating up. Worth a try. The resistor is normally about 0.5 - 2 megohm, if you have a suitable meter to measure it (with everything disconnected).
If the thermostat is an electronic one, you don't connect a neutral.
What boiler is it? Some aren't designed for mains inputs at all!
While you're in there, check that Live and neutral aren't reversed on the boiler. (Neutral to earth should be approx zero volts, L to E approx 230)
I have checked the wiring again and it appears ok.I have disconnected the neutral wire.This has had the opposite effect.The boiler now continues to run and now does not switch off until after the desired temperature has been reached.The thermostat is not an electronic one.It is a fairly standard one costing £7.perhaps it is the termostat!
B
breezer
dont suppose its a frost stat do you? (they do work backwards)
just a thought
just a thought
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