Cata CTRH-50-REV Instructions Pour L'installation, L'utilisation Et L'entretien page 39

10. If the flexible power supply cord is damaged, the special supply cord
provided by the manufacturer must be used, and replaced by the profes-
sional maintenance personnel.
11. If any parts or components of this electric water heater are damaged,
please contact the professional maintenance personnel for repair, and use
the special spare parts and components provided by our company.
1.
Check the power supply plug and socket frequently to make sure that they
have good, reliable contact and are well grounded without overheating.
2. If the heater is not going to be used for a long time, especially in the
regions with low temperatures (lower than 0℃), in order to prevent the
heater being damaged due to the freezing of water in the inner container,
the water inside the heater shall be drained away (refer to Item 9,
Cautions of this manual for the method to drain away the water inside the
inner container).
3.
The recommended water hardness for an optimum working performance
of the water heater should not exceed 120 mg/l of CaCo3 (Calcium
Carbon-ate). In case of exceeding this quantity, it is recommended to use
alterna-tive decalcifying systems (You can check your local water
hardness in the Water Board of you local Town Hall.) Should there be any
failures due to the deposits originated by the water quality, will not be
covered by the guar-antee.
4.
To guarantee the long-term durability and efficiency of your water heater,
it is recommended to clean its inner tank and the deposits in the heating
com-ponents on a regular basis.
It is also recommended to check the magnesium anode periodically
5.
(minimum once a year or every six months depending on the
waterhardness).
If the magnesium anode of your water tank is worn out due to the deposits
6.
originated by the water quality, the After Sales Service will have to replace
it by a new one. The cost of the materials of the replacement of the magne-sium
anode will be covered within the guarantee period, however, the cost of
the workforce or services for this replacement will not be included.
It is recommended to clean the surface of the water heater with soapy
7.
water, never use abrasive products or solvents.
8