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3184 posts
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Cylinder thermostat settings.
Posted 20 Feb 10 12:05 PM
I thought it may be interesting to know what temperature settings you have in your hot water cylinder - and how much notice ecobob users take of the various "60 degree" regulations.
I have solar and a heat pump, thermostat set to 48.
Daughters house, heat pump, 48.
Friend's house, heat pump, 49.
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3184 posts
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Re: Cylinder thermostat settings.
Posted 20 Feb 10 8:17 PM
Why the lower settings?
Not only is that dangerous re. Legionnaires Disease but the water isn't hot enough for washing up.
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3184 posts
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Re: Cylinder thermostat settings.
Posted 20 Feb 10 9:25 PM
Solar, thermostat on electric backup element set to 60, but only switched on if solar heated water drops below 43 c after the sun sets or in case of continual cloudy days manually switched as desired, any lower and we dont get hot showers.
Dishwasher runs off hot supply only, if its too cold then its internal heater brings the water to correct temp.
Mike
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18 posts
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Re: Cylinder thermostat settings.
Posted 20 Feb 10 9:42 PM
OMG Dishwasher!!!!!
Hang your head in shame.
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3184 posts
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Re: Cylinder thermostat settings.
Posted 21 Feb 10 7:50 AM
According to consumer tests, dishwasher uses less water than hand washing and as its supplied with solar heated water then uses very little energy.
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3184 posts
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Re: Cylinder thermostat settings.
Posted 21 Feb 10 7:05 PM
Legionnaires Disease starts to die at 40C and at 50C there is no chance of it forming. Thats why in US it is illegal to have water temperatures over 55C IN the cylinder. But even that argument is flawed as legionnaires can not live in a cealed body of water. It need oxygen which is why it forms around taps and shower rows. The whole philosophy is flawed.
Excause spelling errors
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294 posts
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Re: Cylinder thermostat settings.
Posted 21 Feb 10 9:19 PM
50oC to 55oC is an ideal temperature for which to set a hot water cylinder thermostat for the following reasons:
You should never need to use water hot enough to make a cup of tea direct from the main supply; it should always be boiled in a jug for efficiency.
Washing dishes: maximum 55oC bearable to the hands – safely running a bath using only the hot water supply: maximum 50oC, and for cost effectiveness, the residual water left in the hot water supply pipe cools within a few minutes of draw off (pipe insulation makes no difference in this instance), so the lower the residual heat, the less the loss in energy and cost to originally heat the water.
My water is set at 50oC with a boost setting to 55oC as required.
Rex
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