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6.
DEFECTS AND TROUBLESHOOTING
7.
MAINTENANCE
The great advantage of an electric water heater is that is low maintenance. However this does NOT
mean it is maintenance-free. A water heater does require maintenance from time to time.
7.1 Venting or bleeding the water heater
Switch the power off by disconnecting the power cord from the socket. Open a warm water tap. Make
sure the stopcock of the mains water supply is fully open. You can now hear it fill. That noise will stop
once it is completely filled. The unit is entirely filled once the water flows out in a forceful jet from the
opened warm water tap. Now connect the plug to the socket and switch the heater back on.
7.2 Draining the water heater
Take the power cord from the power socket. Place a bucket underneath the cold water inlet side
(BLUE marking). Close the stopcock on the mains water supply and then remove the pressure relief
valve plus the discharge pipe. Put your finger on the domestic cold water inlet side (BLUE marking)
and connect a water hose to that BLUE side to drain the water. Now disconnect the copper pipe or
flexible (pressure and heat resistant) pipe attached to the hot water outlet side (RED marking) to let air
in, so the tank will empty. To speed up this process you could push some air into the hot water outlet
side, with a bicycle pump.
7.3 Thermal cut-out reset
This unit contains a manually re-settable thermal cut-out that will switch the power off if the
temperature reaches an abnormally high level. Just push the white pin inside the thermostat and you
will reset it.