22
CLEANING AND MAINTENANCE
Check up frequently to see whether the gas supply pipelines (rubber hose) are in
good conditions without aging, cracks. Pay attention to periodic replacement of
rubber hoses. In order to prevent gas leakage, check the joints of pipelines frequently
by using suds to see if there are bubbles given o.
A water heater must be examined, cleaned after it has been used for a period of time
(generally about half a year) to guarantee normal operation of the heater. Observe the
flame frequently. When the flame turns to be yellow from blue, accompanied by black
fume, the heater must be cleaned.
Clean the casing of the unit with water and neutral cleaner other than any chemical
cleaner or volatile solvent, otherwise the casing will fade and lose luster.
Clean the filter net at the water inlet of the unit regularly.
Wipe the casing of the unit with soft and clean cloth often.
The water heaters must be examined, cleaned periodically by the professional
personnel.
Non-professional personnel can not open the cases of water heaters. Pull out the
power plug when opening the case of a water heater. Do not wet the power socket
with water in use to ensure safety.
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Cleaning
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, pull out the
power plug and turn down the gas switch. 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
Maintenance
Take the electrical plug out before clean or maintenance.
Warning
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