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ABS PRO PLUS PW 80 V Slim
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Ariston ABS PRO PLUS PW 80 V Slim [36/44] Maintenance and repair works

4. MAINTENANCE AND REPAIR WORKS

All maintenance and repair works should be carried out by a competent person only in conformity with the safety

norms and with any provisions set forth in this manual.

4.1. Water Drain

If there is a chance that the ambient temperature drops below 0°C in the room where the appliance is installed, drain water

from the water heater.

To do this, the following steps should be done:

4.1.1. Disconnect the appliance from the electrical supply;

4.1.2. Make sure that the water in the appliance is of safe temperature;

4.1.3. Turn o the tap of cold water supply to the water heater;

4.1.4. Turn on the hot water domestic mains tap for discharge of pressure inside the tank;

4.1.5. Turn on the tap (D in Fig. 1) to allow air into the tank. If it is absent, remove the supply tube to the hot water pipe of the

water heater (marked with the red collar);

4.1.6. Connect drain hose directed into the sewer to the drain cock (B in Fig. 1) and open it. If there is no a "T" piece union

with the drain cock, remove the supply pipe to the cold water inlet of the water heater (marked with the blue collar), connect

drain hose directed to the sewer to the cold water inlet;

4.1.7. After draining, make sure there is no water inside the water heater.

Freezing of water inside the water heater leads to irreversible changes and defects.

It invalidates all warranty liability on the part of the manufacturer.

4.2. Replacing internal parts

Disconnect the water heater from the electricity supply. Remove the appliance cover.

• For models featuring a user interface as represented in gures 6 and 8:

To replace the electronic thermostat (Ref. T), disconnect the power supply cable (Ref. C) and the control panel wires (Ref. Y).

Next, remove it from its slot, taking care not to bend the sensor support rod (Ref. K) too much.

To replace the control panel (Ref. W), disconnect the wires (Ref. Y) and loosen the screws.

• For models featuring a user interface as represented in gures 7 and 9:

To replace the sensor support rod (Ref. K), disconnect the wires (Ref. F) from the P.C.B. and remove it from its slot, taking care

not to bend it too much.

To replace the control board (Ref. W), disconnect the wires (Ref. Y) and loosen the screws. To replace the power board (Ref. Z),

disconnect the cables and wires (Ref. C, Y, F and P) and loosen the screws.

During reassembly, please, make sure that all components are put back in their original positions.

Prior to work, the water heater must rst be emptied. For models tted with a surge protection ange, remove the nut (D in

Fig. 7) and remove the bracket xing the ange in place (S in Fig. 7), then press the ange (F in Fig. 7) inwards and remove it

with a semicircular movement.

For other models, loosen the 5 nuts (C in Fig. 8) and remove the ange (F in Fig. 8). The heating element and anode are

attached to the ange. During reassembly, make sure that the ange gasket, the thermostat and the heating element are put

back in their original positions. We recommend the ange gasket is replaced every time it is removed.

Only use original spare parts.

4.3. Periodical maintenance

4.3.1. Magnesium anode

The magnesium anode is an integral part of the protection system of water tank against corrosion. Given that aggressive

properties of water cause faster wear of the magnesium anode, conditions of the magnesium anode should be checked

ANNUALLY. In case of severe wear, the magnesium anode must be replaced. The warranty for water-containing tank with the

worn magnesium anode (residual volume is less than 30%) is not valid. To replace the anode, disassemble the heating

element and unscrew from the support bracket.

The magnesium anode should be replaced at least 1 in 24 months (excluding the water heater with the inner tank of stainless

steel).

The magnesium anode is a consumable item that cannot be replaced under warranty.

Following the rules of scheduled maintenance will allow you to ensure a long life of the water heater.

Ariston ABS PRO PLUS PW 80 V Slim [36/44] Maintenance and repair works

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