Waiwela MiniTank WM-1.0 Installation And Operating Instruction Manual page 12

Maintenance instructions cont.
Warning
: Before servicing or cleaning the water heater, turn off the power switch and disconnect the
power cord from the electrical outlet.
Note
: For most maintenance operations, the water heater will be drained. In all cases before draining
first turn off the power switch and then unplug power cord.
Draining and removing the water heater:
1. Unplug the water heater.
2. Open a hot water faucet to let hot water run out. Allow water to flow until water is no longer hot.
3. Turn off the cold water supply to the water heater.
4. Close the hot water faucet.
5. Disconnect the water heater from both the hot and cold water connections.
6. If possible siphon out remaining water.
7. Carefully detach the water heater from the wall.
8. Tilt the water heater to drain remaining water out of the heater.
Removing the heating element:
1. Turn off power supply, unplug water heater power cord and drain (see above).
2. Remove cover.
3. Remove all the line wires from the heating element.
4. Unscrew the heating element retaining nuts.
5. Remove the element.
Descaling the heating element :
Scale deposits can affect the heating capability of the element. Heavy scale can even cause the element
to burn out. The element can be descaled chemically or manually.
1. Remove the heating element (see above).
2. To descale chemically, soak the heating element in white vinegar or other descaling solution and
then rinse well with fresh water. (cont.)
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