Economy 7 timer switch

[johnnorman40]

Hi, hoping for some advice…

We have an economy 7 system that heats the water off peak. The water heater is ‘on’ for 7 hours but we don’t need it on that long. Is it possible to replace the wall switch to the economy 7 immersion with a digital timer switch? I realise the there is no power to the switch during on peak hours so am wondering what type of timer switch I could use? I’ve been looking at the switch below. Would this work?

Greenbrook T205-SCR Surface-Mounted Digital 7-Day Fused Timer Spur Switch

Order online at Screwfix.com. Combined timer and fused spur ideal for control of towel rails, panel heaters, immersion heaters and fan heaters. FREE next day delivery available, free collection in 5 minutes.

www.screwfix.com

 

[Harry Bloomfield]

We have an economy 7 system that heats the water off peak. The water heater is ‘on’ for 7 hours but we don’t need it on that long. Is it possible to replace the wall switch to the economy 7 immersion with a digital timer switch?

Turning it off, during the E7 hours, if your cylinder is well insulated and has a stat fitted - will make like or no difference to your consumption, so it would be pointless. If you want a system able to turn the supply off during the E7 hours, then you will need to add a separate supply just for the clock/timer, which is on all the time.

Usually the questions associated with E7 and immersion heaters, is how to arrange it to give the water a boost, during peak hours.