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A.O. Smith ST 750 Manual

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ST 400 / 500 / 600 / 750 / 1000
31
4 Warranty
4.1 General warranty
4.2 Tank warranty
4.3 Conditions for
installation and
use
4.4 Exclusions
If within one year of the original installation date of a storage tank supplied by A.O. Smith,
following verification, and at the sole discretion of A.O. Smith, an assembly or part (with
exclusion of the tank) proves to be defective or fails to function correctly due to
manufacturing and/or material defects, then A.O. Smith shall repair or replace this assembly
or part.
If within 3 years of the original installation date of a storage tank supplied by A.O. Smith,
following verification, and at the sole discretion of A.O. Smith, the glass-lined steel tank
proves to be leaking due to rust or corrosion occurring on the water side, then A.O. Smith
shall offer to replace the defective storage tank with an entirely new storage tank of
equivalent size and quality. The warranty period given on the replacement storage tank shall
be equal to the remaining warranty period of the original storage tank that was supplied.
Notwithstanding that stated earlier in this article, in the event that unfiltered or softened
water is used, or allowed to stand in the storage tank, the warranty shall be reduced to one
year from the original installation date.
The warranty set out in articles 1 and 2 will apply solely under the following conditions:
a. The storage tank is installed under strict adherence to A.O. Smith installation instructions
for the specific model, and the relevant government and local authority installation and
building codes, rules and regulations in force at the time of installation.
b. The storage tank remains installed at the original site of installation.
c. The storage tank is used exclusively with drinking water, which at all times can freely
circulate (a separately installed heat exchanger is mandatory for heating saline water or
corrosive water).
d. The tank is safeguarded against harmful scaling and lime build-up by means of periodic
maintenance.
e. The water temperatures in the heater do not exceed the maximum setting.
f. The water pressure and/or heat load do not exceed the maximum values stated on the
storage tank plate.
g. The storage tank is installed in a non-corrosive atmosphere or environment.
h. The storage tank is connected to a protected cold supply arrangement, which is:
approved by the relevant authority; with sufficient capacity for this purpose; supplying a
pressure no greater than the working pressure stated on the storage tank; and where
applicable by a likewise approved temperature and pressure relief valve, fitted in
accordance with installation instructions of A.O. Smith applying to the specific model of
storage tank, and further in compliance with the government and local authority
installation and building codes, rules and regulations.
i. The storage tank is at all times fitted with cathodic protection. If sacrificial anodes are
used for this, these must be replaced and renewed when, and as soon as, they are 60%
or more consumed. When power anodes are used, it is important to ensure that they
continue to work properly.
The warranty set out in articles 1 and 2 will not apply in the event of:
a. damage to the storage tank caused by an external factor;
b. misuse, neglect (including frost damage), modification, incorrect and/or unauthorised use
of the storage tank and any attempt to repair leaks;
c. contaminants or other substances having been allowed to enter the tank;
d. the conductivity of the water being less than 125 µS/cm and/or the hardness (alkaline-
earth ions) of the water being less than 1.00 mmol/l;
e. unfiltered, recirculated water flowing through or being stored in the storage tank;
f. any attempts at repair to a defective storage tank other than by an approved service
engineer.
… 31 …


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