Whale Expanse WW0821U Consignes D'installation Et D'utilisation page 20

OPERATING INSTRUCTIONS - DRAIN VALVE
The Water Heater must be drained if it is not being used for a period of more than 3 days or if there is a danger of
freezing (unless Frost Protection is active). The drain valve is located at the top of the Water Heater, beside the cold
and hot water inlet. To operate the drain valve, turn the yellow lever clockwise 90 degrees.
Fig. 35B Drain Valve Open Position
Fig. 35A Drain Valve - Closed Position
8. MAINTENANCE
The Water Heater must be fully sterilised at least once per year. If the Water System has not been used for a
period of 7 days or longer, you must fully drain the water system and rinse it thoroughly before refilling it. After use, to
clean and sterilise inside the Water Heater and the full water system, use diluted sterilising fluid (as per manufacturer
recommendations). Open all the taps in the vehicle to ensure no air remains in the system. When the air is removed,
close the taps and leave the sterlising solution for between 1 - 2 hours. You must now drain the system and fully rinse
through with fresh drinking water. The system can now be used normally.
The outside of the appliance should not normally require cleaning. If it does, isolate the electrical supplies and wipe
down with a soft, damp cloth only. Do not use abrasive cleaners. Allow to fully dry before reconnecting the electrical
supplies. If descaling of this appliance is required, this can be done using a domestic liquid de-scaling product and
fully rinse through with clean water afterwards. Cleaning and user maintenance must not be carried out by children
without supervision.
Please Note: Water will drip from the discharge pipe of the pressure-relief valve during heat up. The pressure relief
valve must be operated regularly (at least twice a year) by turning the yellow lever in the anti-clock wise direction
(see Fig. 35B), to remove lime deposits and to ensure that it is not blocked.
The Whale Water Heater must be checked periodically by a Whale Approved Service Centre / Technician, or
competent person, at least annually. This must be completed according to the practice in the country where it is used
and according to the Whale instructions. Whale recommends annual testing of gas soundness and combustion by an
accredited LPG gas engineer. The appliance contains ESD sensitive components - please contact Webasto for more
information and advice.
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