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INSTALLATION INSTRUCTIONS

Repair and maintenance

Note:

All the repair and maintenance must be carried out by authorized technicians. The

maintenance of the water heater must be fulfilled at least once a year. It is

recommended to carry out the maintenance after a period of heating operation. The

maintenance and repair must be kept in record. Before cleaning or maintenance and

repair, please take off battery from the water heater and turn down the gas valve.

Only the original spare parts for maintenance can be used.

If the spare parts used for maintenance are not original, the manufacturer does not

assume any quality guarantee. The connecting pieces must be new.

To ensure safe and effective operation, the appliance must be serviced

once a year by a Gas Safe registered engineer.

1. Daily maintenance done by the end user:

• Check the gas pipe regularly for leakage or any defect. If in doubt contact service

center.

• Clean water filter on cold water inlet regularly.

• Check water leakage regularly.

• When flame turns from blue to yellow with black smoke, close the gas valve and

call service center immediately for help.

• Check the exhaust flue pipe frequently to avoid the jam. If the exhaust gas cannot

go outside it can lead to CO poisoning.

• Check the ventilation.

• Check the appearance of the appliance.

• Check if any strange sound occurs during usage.

• When you plan not to use the appliance for a longer period of time, close the gas

and water valves and remove the batteries from battery compartment.

2. Anti-freeze protection

Should the appliance be installed where pipes are subjected to freezing, it is

recommended to empty it.

Proceed as indicated below:

• Turn the outer electrical switch to the OFF position.

• Close the gas valve.

• Close the cold water inlet valve.

• Open the DHW taps until both the appliance and pipes are completely

emptied.

• Screw off the drain valve on water inlet connector.

To resume operation, tighten the drain valve, open the cold water inlet isolation valve

together with DHW taps until water flows steadily from all taps.