Vaillant EcoTec Plus hot water temp
Discussion
Recently moved and have the above boiler.
The hot water coming out of the tap is way too hot for us. So wanted to adjust down.
Quick youtube seems to be very simple, just select hot water on the left side and use the +/- to adjust the temperature.
However, on our display we dont have hot water. It just has radiators?
I must be going wrong somewhere but its literally so simple that I am not sure how as the boiler only does 2 things, hot water and then radiators.
Anyone have one of these boilers?
The hot water coming out of the tap is way too hot for us. So wanted to adjust down.
Quick youtube seems to be very simple, just select hot water on the left side and use the +/- to adjust the temperature.
However, on our display we dont have hot water. It just has radiators?
I must be going wrong somewhere but its literally so simple that I am not sure how as the boiler only does 2 things, hot water and then radiators.
Anyone have one of these boilers?
The question is if you have a hot water tank or not. If you have a hot water tank (which I'm guessing you do) then the boiler has presumably been plumbed to use the radiator side of things to do hot water and heating, with a valve to divert the hot water coming out of the boiler to either the rads or the tank depending on demand.
Set the boiler to 65 and then take a look at the thermostat on your hot water tank and what it is set to - somewhere around 60 is normal.
Or ignore me if it's a combi
Set the boiler to 65 and then take a look at the thermostat on your hot water tank and what it is set to - somewhere around 60 is normal.
Or ignore me if it's a combi
There is a tank.
I think, and don't quote me on this, that the tank water temp is set by a dial on the front.
What I did was turn the hot water on via boiler.
Nothing happened.
Then I turned the dial from 65c to 70c, there was a click and the boiler fired up.
I left this for 2 min then turned the dial back to 40c and the boiler turned off.
So I think its that? Seems weird but there you go.
I lowered the water temp to 55c to start with now, see how that goes it was literally scalding hot before at 65.
I think, and don't quote me on this, that the tank water temp is set by a dial on the front.
What I did was turn the hot water on via boiler.
Nothing happened.
Then I turned the dial from 65c to 70c, there was a click and the boiler fired up.
I left this for 2 min then turned the dial back to 40c and the boiler turned off.
So I think its that? Seems weird but there you go.
I lowered the water temp to 55c to start with now, see how that goes it was literally scalding hot before at 65.
gotoPzero said:
There is a tank.
I think, and don't quote me on this, that the tank water temp is set by a dial on the front.
What I did was turn the hot water on via boiler.
Nothing happened.
Then I turned the dial from 65c to 70c, there was a click and the boiler fired up.
I left this for 2 min then turned the dial back to 40c and the boiler turned off.
So I think its that? Seems weird but there you go.
I lowered the water temp to 55c to start with now, see how that goes it was literally scalding hot before at 65.
Yes, that's perfectly normal for a hot water cylinder.I think, and don't quote me on this, that the tank water temp is set by a dial on the front.
What I did was turn the hot water on via boiler.
Nothing happened.
Then I turned the dial from 65c to 70c, there was a click and the boiler fired up.
I left this for 2 min then turned the dial back to 40c and the boiler turned off.
So I think its that? Seems weird but there you go.
I lowered the water temp to 55c to start with now, see how that goes it was literally scalding hot before at 65.
Bear in mind that if you set its thermostat at 50C it's going to be quite a lot hotter at the top (which is where the hot water comes from when you opena tap).
To some extent how hot it gets at the top depends on your boiler flow temp - some people whack their boiler flow temp up to 80C. Others run it low, but then you could have a problem with the hot water cylinder taking ages to re-heat.
gotoPzero said:
Ok will have a look the hot water for the rads (and now I guess the cyl) is set to 75 I think.
Unless the house is old and cold, 75 is probably a bit overkill for the heating. Turn down to 65 and it'll work just as well but be more efficient (and still heat your hot water just fine). If the heating then can't cope when things are getting cold, turn up the flow temp. We have an ecotec plus on a Y plan, vented boiler and tank system, ie header tank in loft.
Though you do have two thermostats on the boiler one for heating and one for hot water the latter is irrelevant. Though it does need to be set lower than the heating temp.
Essentially you set the heating temp to one that works for you, 75C sounds a bit high to me, even in middle of a cold winter we never set ours above 65-67C. The hot water temp is regulated by the thermostat on the cylinder at whatever you choose to set.
If the demand is for both heating and hot water the motorised valve lets flow through to both cylinder and radiators. As soon as cylinder thermostat trips the valve shuts off flow to cylinder coil and continues heating radiators until the room stat reaches setting.
If you get all the setup correct you'll find, at least in our case, the system heats up from clock cold rapidly, including a good tank of hot water, but then boiler modulates right down to very low outputs so you don't get boiler cycling on / off constantly. You can check the output by reading fan speeds, at minimum it's almost silent.
Do you have the operating manual how to read all the display modes?
Though you do have two thermostats on the boiler one for heating and one for hot water the latter is irrelevant. Though it does need to be set lower than the heating temp.
Essentially you set the heating temp to one that works for you, 75C sounds a bit high to me, even in middle of a cold winter we never set ours above 65-67C. The hot water temp is regulated by the thermostat on the cylinder at whatever you choose to set.
If the demand is for both heating and hot water the motorised valve lets flow through to both cylinder and radiators. As soon as cylinder thermostat trips the valve shuts off flow to cylinder coil and continues heating radiators until the room stat reaches setting.
If you get all the setup correct you'll find, at least in our case, the system heats up from clock cold rapidly, including a good tank of hot water, but then boiler modulates right down to very low outputs so you don't get boiler cycling on / off constantly. You can check the output by reading fan speeds, at minimum it's almost silent.
Do you have the operating manual how to read all the display modes?
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