what temperature to set thermostat for hot water?

katrina123

hi
ive noticed our hot water is always tooooo hot.
Im guessing this is increasing the gas bill.
gas boiler heats water up in our house.

what setting should i use? for hot water for shower etc.

"setting the thermostat at 60°C/140°F is fine for bathing? "

we have lifestyle LP722 thing in kitchen, im assuming its set from this box??

thanks.

penrhyn

60 degrees is supposed to be the minimum recommended temperature to prevent legionella developing.
Assuming you have a hot water tank then there is normally a thermostat attached about half way up.
The lifestyle thingy, is your central heating programmer. It sets the times that the hot water and central heating come on and go off, not the termperature.

katrina123

thankyou thankyou
yes drayton HTS3 we have.
its set to a bit below 60˚c already.
yeah the pdf online manual says 60 is popular setting.

legionella? unhealthy for body or just boiler? scary.

so why is our hot water so hot? if the thermostat is already below 60?

im assuming the higher it goes over 60, the more the gas bill will be and the more hot the water wil be?

yeah the lifestyle thingy, we set that to automatically turn on the hot water at specific times.

katrina123

drayton manual says:
"If you have a boiler control thermostat, it should always
be set to a higher temperature than that of the cylinder
thermostat. In most boilers, a single boiler thermostat
controls the temperature of water sent to both the cylinder
and radiators, although in some there are two separate
boiler thermostats."

drayton is a cylinder thermostat.

could i also have a boiler thermostat? where would it be?

penrhyn

Can be fatal to humans.
http://en.wikipedia.org/wiki/Legionnaire_disease

The thermostat could be faulty, however the tank will be hotter at the top by a few degrees,is it a fully pumped system that you have.
In other words can you have the central heating on independently of the water and vice versa.

want2bmortgage3

i had a combi boiler and had the heating at the max of 82, and the water at 50. this was more than hot enough for a shower/bath and i still had to mix in some cold to avoid being scalded.

i never knew about the 60 minimum thing but to me that sounds like it would be much too hot!

katrina123

penrhyn wrote: »

Can be fatal to humans.
http://en.wikipedia.org/wiki/Legionnaire_disease

The thermostat could be faulty, however the tank will be hotter at the top by a few degrees,is it a fully pumped system that you have.
In other words can you have the central heating on independently of the water and vice versa.

yes we can have just hot water on, or just central heating, or both.
i think...well at the moment it just is set up to put hot water on at a set time, for 30mins or 1hr.

but i think when we do put central heating on in winter, this makes the tap water hot in affect. really hot.
well i def know we can put hot water on independantly as thats what we do now.

no idea if its a pumped system.
however by the boiler tank ive spotted two other little boxes, both with settings on them, L M H or somthing, im assuming low medium high, and another box with 1 2 3 setting.....both are set to medium setting, or middle one.

katrina123

want2bmortgage3 wrote: »

i had a combi boiler and had the heating at the max of 82, and the water at 50. this was more than hot enough for a shower/bath and i still had to mix in some cold to avoid being scalded.

i never knew about the 60 minimum thing but to me that sounds like it would be much too hot!

thanks.

yeah when i have a bath or just wanna use hot water to wash up, i HAVE TO MIX IN COLD WATER, as its just way toooo hot just using hot water.
is this a sign of things not set up right???
should we NOT need to mix cold water to use hot water???

penrhyn

The box with LMH on it is your pump.
The other unit is most probably a motorised valve, it may have a little lever poking out the side. This indicates the position of the valve. If its like mine then, top= Central Heating, mid = CH & HW, bottom =Hot Water. Could be the other way round.



Motorised valve.



Pump.

If you get someone to turn on the Hot water, turn it off then do the same with the central heating central heating, you should see the lever move, if it stays stuck in the middle , then thats the reason your water is overheating, as the motor has failed.

smjxm09

want2bmortgage3 wrote: »

i had a combi boiler and had the heating at the max of 82, and the water at 50. this was more than hot enough for a shower/bath and i still had to mix in some cold to avoid being scalded.

i never knew about the 60 minimum thing but to me that sounds like it would be much too hot!

If your heating is set to 82C then it is unlikely that the boiler is actually condensing. For condensing to work the returning water from the radiators has to be below 57C. Your boiler will be less efficient unless it does condense.

want2bmortgage3

hi i dont think it is a condensing boiler just a combi.. never thought it was that efficient really maybe thats why!