9. Draining
•
Do not connect to electricity supply without re-filling the tank, checking for leaks
and purging any air out of the system.
•
Unplug the unit from the electricity mains.
•
Run the boiling tap until it is dispensing cold water.
•
Unplug the black lead tap connector (3.5 mm jack) from the back of the heater.
•
Turn off water supply. Disconnect the water supply to the tank and tap. Lift the tank
to the sink, turn upside down and drain all the water from the tank.
•
When re-installing follow the original installation instructions.
10. Descaling the Tank
The tank should be descaled at least annually and more frequently in aggressive water
areas. A service cartridge can be used. These are available from Hyco, please contact our
service department for further information.
21
•
To change the filter grip the filter head, rotate the existing cartridge 90º anticlock-
wise and pull out.
•
Insert the new cartridge into the filter head and rotate 90º clockwise.
•
Flush the filter through ensuring the water runs clear.