Giona SERIES RAPIDI 10 Montage-, Bedienungs- Und Wartungsanleitung Seite 12

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4) OPERATING INSTRUCTIONS (U
4.1. Switching on
Before switching the appliance on check correct electrical connection and water filling. The appliance has an adjustment
thermostat that automatically controls the water temperature; the indicator light stays on only during the heating phase.
CAUTION: Before switching the appliance on, always make sure it is filled with water, in order to avoid
serious damage to the electric heating element.
4.2. Dripping from water safety unit.
Dripping of the water safety unit is normal during the heating phase.
With heating, the water expands and cannot be compressed. If the plumbing system is unable to absorb this increased volume
the internal pressure increases, causing intervention of the safety device which, by discharging the excess water, prevents
overpressures in the tank - see the section "expansion tank" par. 3.3.3.
4.3. Temperature adjustment
IMPORTANT: The possibility of thermostat adjustment allows power consumption to be optimised
according to the comfort required (hot water temperature). However, in order to prevent "legionella"
bacteria to form it is advisable not to allow the stored water temperature to become too low. Therefore,
comply with the following general prevention measures:

Keep the hot water inside the appliance at a temperature of not below 50°C;

In case a prolonged absence let water run from taps and showers for a few minutes;

Keep showers and taps clean of scale;
4.3.1. Models without external selector.
The thermostat is factory-set to max. value; to change the setting disconnect the power supply then remove the protection
cover, turn the thermostat knob Fig. 1 towards "+" to increase or "-" to decrease the temperature. Refer to the relevant notch
located on the thermostat. To prevent the formation of "legionella" an adjustment close to the factory setting (towards the "+"
notch) is advisable.
4.3.2. Models with external selector.
Adjustment is made by turning the knob (selector) located on the cover (see fig. 18). Max. temperature setting is obtained by
turning the selector in the proximity of the wording "MAX" screen-printed on the cover (see Fig. 18).
Position "E" enables use between comfort and economy setting. It is advisable to adjust the temperature to between "E" and
"MAX" in order to prevent the formation of "legionella"
4.4. Safety limiting device
The appliances are equipped with a thermostat with safety limiting device (see Fig. 2), in compliance with current CEI-EN
standards. The limiting device intervenes in case of abnormal water heating, automatically disconnecting the power to the
electric heating element. Resetting is manual.
The operation can be carried out by the user as indicated in par. 5.1.
If the anomaly reoccurs contact qualified personnel.
4.5. External cleaning
Clean the outer casing using neutral soapy solutions and never organic solvent-based abrasive products (alcohol, petrol, etc.).
4.6 Water safety unit efficiency check.
The efficiency of the water unit is very important for preventing overpressures inside the tank (damaging it) and allows safe use
of the appliance. Periodically check the efficiency of the water safety unit by following the manufacturer's instructions. When
checking, also clean and remove any scale.
4.7. Emptying the appliance
In case of prolonged absence it is advisable to completely empty the appliance. In which case proceed as follows:
- switch off the power and close the main water supply;
- open a hot water tap to allow the entry of air;
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