Setting the controls
Some properties may only have an on and off switch, but most will have a heating controller. Your heating controller is probably similar to one of the two wall controls illustrated. Both water heater controls have been designed to work off the cheap night-rate electricity and to enable you to boost your hot water supply, if it is needed, during the day.
BX2000 water heater control
This water heater control has been designed to offer flexibility for those using off-peak electricity for water heating. It provides the facility to boost your supply of hot water at any time and to ensure you are automatically connected to the off peak supply whenever it is available.
If you require extra hot water during the day, switch the normal supply electricity to the on position and press either the one-hour or two-hour boost buttons to heat extra hot water. The light below whichever boost button has been selected will illuminate.
Economy 7 Quartz control
This controller has been designed to take advantage of cheap night-rate electricity, so that there is a tank of hot water available for the morning.
Both of the timers are connected to dials on the front of the water cylinder.
If you need to use extra hot water during the day, you will only need to boost the supply for a short period of time by setting the minute timer on the control.
The Economy 7 Quartz upper timer dial is used for regulating the Economy 7 off-peak electricity, whilst the lower dial regulates a timed boost for the water heater which is available any time during the day to heat extra hot water.
Be aware that the cost of using the booster on-peak electricity will be significantly more than the Economy 7 off-peak electricity.
If you are going away, make sure you switch the water heater off.
Immersion heaters without a controller
To make sure that Economy 7 off-peak electricity is being used for heating your water, follow the cable (if it is visible) from the bottom dial on the cylinder to the relevant wall on/off switch. This is the switch for using the Economy 7 off-peak electricity tariff. Check the wall switch is switched to the on position.
The other dial on the wall controller leading to the higher dial on the water cylinder should be switched to the off position as this is the switch for the 24 hour booster on-peak electricity, which is charged at a considerably higher rate. Turn it to the on position if you are boosting your hot water supply but remember to turn it off afterwards.
If you want to cancel the boost setting before the boost time is complete, press the cancel button but don’t forget to turn the electricity normal supply switch to the off position.
If you are going away, make sure you switch off both switches.