Ariston PRO R Series Manuel - Page 29

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3. STARTING AND OPERATION

3.1. Commissioning

Before connect the appliance to electricity source, ll the tank up with mains water. To do this, turn on the domestic mains

tap and the hot water tap.

Once the water heater is full, the water will ow from the domestic mains tap. Visually check for water leaks from the ange

and slightly tighten it, if necessary.

Power the appliance at the switch.

3.2. Temperature control

In models equipped with external control, water temperature can be controlled by a handle connected to the thermostat in

accordance with marks.

If an appliance model does not have an external temperature controller, temperature can be set by turning the adjusting

screw of the thermostat in the range marked by the signs "+" and "-". To do this, disconnect the water heater from the power

supply and remove the plastic cover of the appliance. It is recommended to install the controller in a position corresponding

to approximately 75% of the maximal value. In this case, the appliance is operated in economy mode, signi cantly reducing

the rate of scale formation.

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 heater from the power supply. Remove the cover. To work with the thermostat, pull it straight out and

disconnect from the power supply.

In order to work on the heating element and the anode, the appliance must rst be emptied. For models with an autoclave

ange, remove the nut (D in Fig. 3), remove the ange holder (S in Fig. 3) and open the ange (F in Fig. 3) by pressing it inside.

Remove the ange by turning it on its axis.

For other models, remove 5 nuts (C in Fig. 4) and remove the ange (F in Fig. 4). The heating element and anode are attached

to the ange. When assembling the appliance, be sure to put the heating element, ange seal, and thermostat into their

initial position. We recommend the ange gasket is replaced every time it is removed.

Use original spare parts of the manufacturer only.

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.