Waiwela Mini TankWM-4.0 Installation And Operating Instruction Manual - page 13

Page 13

Descaling the heating element cont.

3. To descale manually, let element dry and then using a non metallic brush similar to a tooth  

brush; brush the residue from the element. Avoid damaging the surface of the element.

4. Reinstall the element and gasket.

5. Refill tank with water before turning on the power to the water  heater

.

Replacing the heating element : 

1. Unplug and drain the water heater (see prior instructions).

2. Remove heating element noting original positions of all connections.

3. Install new element with gasket making sure the new element and gasket are positioned   

 correctly. 

4. Tighten retaining nuts and make the wire connections to their original locations.

Changing the thermostat :  

1. Turn off the power switch and unplug the water heater from the electric outlet.

2. Drain and remove the water heater. (see page 12)

3. Remove six screws retaining the bottom panel of the water heater and remove the  

 panel.

4. Remove thermostat knob and unscrew two retaining screws. It may be necessary to pry the  

knob off of the thermostat spindle. Now remove front panel.

5. Disconnect the push-pull wire connectors on the    

thermostat noting which connector goes to    

which terminal.  Terminals are marked.

6. Remove the thermostat probe from the well.

7. Install new thermostat, attach wires and tighten    

 screws.

Thermostat