We recently moved into a small flat in the UK. For hot water we have an electric water tank with a main switch and electric timer:
I made the following experiments:
- Main switch on / Timer on – There is hot water
- Main switch on / Timer off (by removing pins and setting manual mode to off) – There is hot water
- Main switch off / Timer on – No hot water
- Main switch off / Timer off – No hot water
It seems that the timer is not working or I don’t understand how it is supposed to work. We are on Economy 7 tariff (cheaper night energy) and I am looking for a ways to reduce our bill. For the first week with the hot water tank constantly on we had 84 kWh day energy. This seems a lot since we hadn’t yet used the electric heaters.
My questions are:
- Is the electric timer supposed to work and the water to be heated when the main switch is off?
- Will it be more effective to keep the main switch always on (i.e. the water tank constantly working, i guess it has a thermostat) or it would be better to turn it on only for 2-3 hours per day?