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English 23
thermal switch was switched off or not switched on. To reset the water heater to the operating
condition, it is necessary to:
1. De-energize the water heater.
2. Press the button, located at the center of the thermal switch, see Diagram 13;
3. If the button is not pressed and there is no clicking, then you should wait until the thermal
switch cools down to the initial temperature.
Warning: Non-professionals are not allowed to disassemble the thermal switch to reset.
Please contact professionals to maintain. Otherwise our company will not take responsibility if
any quality accident happens because of this.
5.2 Tank Cleaning
After having been used in a long time, tank water heater will have the dirt in it and therefore must be
cleaned:

Turn off the power source.

Close the cold water tap.

Open the hot water tap.

Open the Pressure Relief Valve (if used).

Flush / rinse with cold water tanks.
Repeat this process several times until the tank is completely clean.
5.3 Cleaning The Safety Valve
Safety valves should be cleaned regularly to prevent any dirt that clogs the valve:

Remove the safety valve, then clean and wash.

Check if parts of the valve are still able to move well.

After cleaning, replace the safety valve in its place by first giving the seal tape.
Fill the water heater with water after pipes refitted.
5.4 Magnesium Anode
Magnesium Anodes serves to neutralize corrosive substances in the water and will run out in a certain
time depending on the corrosive properties of the water. If the water is quite good (PAM), Magnesium
Anodes should be replaced within 2 (two) years. If the water quality is not good, Magnesium Anodes
should be replaced 1 (one) year. To replace Magnesium Anodes, contact MODENA Service Center.
5.5 Heating Element
If the water contains lime (Mud), the heating element cannot function properly (slow heat) because it
was covered by a crust of lime (mud). Therefore, Heating Element must be cleaned of sediment each
year. Contact MODENA Service Center.