The top one (immersion) comes on during the day.
I don't know what type of timer is used for the night-time (bottom) element. It wires directly into the wall and, as with all the Economy 7 items in the house, appears to be on a separate circuit - there is no apparent timer, but all wire into...
The stat (thermostat?) has been adjusted through its full range without much affect seen (if any).
The elements are wired correctly - when the immersion is turned on during the day we get hot water.
Hi,
I have problem with my water tank. The system is electric and runs on Economy 7 and is currently only heating water to what I would call a tepid temperature, but it does appear to be heating the water to some degree. We have an immersion heater which we have been using to top up the heat...