Horstmann E7BX hot water controller

[Effervescent]

My Horstmann E7BX hot water controller is coming on at 22.30 and only goes off at 08.00 which are not the times I have for offpeak from my electricity supplier. This means I am heating hot water all night. Does the E7BX only get the time signal from the electricity meter or can it get the times from elsewhere? The electricity company is saying their meter is working correctly.

 

[JohnD]

This means I am heating hot water all night.

Not if your cylinder or store has a thermostat, which will turn off the supply when it reaches target temperature. An immersion heater, for example, warms about 1 litre per minute, so a 120 litre cylinder is heated for about two hours if it is fully cold; less if it is partially hot.

If there is no thermostat, it will boil, which is highly undesirable.

Also read here:
http://www.horstmann.co.uk/products/heating-and-hot-water-controls/boost-controls/e7bx

 

[Effervescent]

My cylinder does not have a thermostat.
Do you know where the E7BX gets its signal from? Is it only from the electricity meter or are there controls inside it?

 

[JohnD]

My cylinder does not have a thermostat.

I bet you £5 it does.

Show us a photo.

 

[Effervescent]

Will do once I work out how to attach a photo to the message!

 

[EFLImpudence]

There are no timers in it.
If the switch is in 'timed' position (on) then if the off-peak is not on neither is the immersion.

If the boost switch went faulty and was on permanently then so would be the immersion.

 

[EFLImpudence]

Will do once I work out how to attach a photo to the message!

Just copy it and paste.

 

[Effervescent]

Thanks. Picture below.

 

[JohnD]

photo of the cylinder and the cap of the immersion heater please, so I can claim my £5

 

[EFLImpudence]

The light on the BX indicates the boost is on.

 

[Effervescent]

Will have to go home and take another photo.

The E7BX red light is on between 22.30 and 08.00. If the "timed" button is down (i.e. not off) between those times I can hear that the immersion heater is on and it is heating the water.
Between 08.00 and 22.30 I have to turn the boost dial to heat the water.
Electricity company are claiming it is not a problem with their meter.
I don't see how it can't be as presumably the E7BX only gets is signal from the meter.

It is not permanently on as the immersion only comes on between 22.30 and 08.00 unless I turn the dial. So I don't think it can be a faulty boost switch.

 

[EFLImpudence]

Is the light on and boost off in your picture?

 

[Effervescent]

Yes. This is a photo I sent to electricity company to show that light was on and boost was off at 22.30 in the evening when it should have been off.

 

[JohnD]

the immersion only comes on between 22.30 and 08.00 unless I turn the dial.

So what is the problem you want to resolve?

Presumably the cylinder is not boiling or using 29kWh of electricity every night?

 

[Effervescent]

The problem is that my immersion heater is on all night when it is only meant to be on during the off peak hours.