08
7 OPERATING INSTRUCTION
7.1 Operation steps
Before using this unit, please follow the steps below. Filling
water: If the unit is used for the first time or used again after
emptying the tank, please make sure that the tank is full of
water before turning on the power.
Method: see Fig.7-1
Fig.7-1
Open the cold water inlet and
hot water outlet
Open
Open
1. Cold water inlet 2. Hot water outlet
Filling water
When water flows out from the water outlet, the
tank is full. Close the hot water outlet valve and
water tank filling is finished.
Close
Hot water outlet
Water out
CAUTION
Operation without water
in water tank may result in
damage of electric heater. Due
to such damage, the supplier is
not responsible for the quality
issue.
Bang
CAUTION
Over 50 °C may result in serious
burn. Special care should be
paid to the children, the disabled
and the old in case of water
burn.
Emptying: If the unit needs cleaning, moving etc, the tank
should be emptied.
Method: See Fig.7-2:
Fig.7-2
Close the cold water inlet, open the hot water
outlet and open drainpipe.
Open
Open
Open
1. Hot water outlet
2. Cold water inlet
3. Drain valve
Emptying
Close
After emptying, please shut off the drain
valve.
Close
Drain valve
8 MAINTENANCE
In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to
be carried out at regular intervals.
CAUTION
• Before carrying out any maintenance or repair activity always switch off the circuit breaker on the supply panel,
remove the fuses or open the protection devices of the unit.
• Make sure that before starting any maintenance or repair activity, also the power supply to the unit is switched off.
The described checks must be executed at least once a year.
• Domestic hot water tank pressure relief valve.
• Check for correct operation of the pressure relief valve on the domestic hot water tank. Domestic hot water tank booster
heater.
• It is advisable to remove scale buildup on the booster heater to extend its life span, especially in regions with hard water.
To do so, drain the hot water tank, remove the booster heater from the hot water tank and immerse in a bucket (or similar)
with scale-removing product for 24 hours.
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