A.O. Smith EQ 280 G, Инструкция по установке и эксплуатации

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2.8 Maintenance
To ensure safe and efficient
operation of the water heater it is
recommended that it is cleaned and
serviced at least once a year by a
qualified competent person.
2.8.1 Sacrificial anode
The life cycle of the anode is
determined by the quality and the
quantity of the water flowing through
the apparatus. It is therefore
recommended that the anode be
inspected and replaced if necessary at
least once a year.
1. Close the stop cock in the cold water
supply pipe.
2. Open the nearest hot water tap in
order to allow the pressure to drop
from the water heater and the pipes.
3. Slacken the anode with a fitting
wrench.
4. Check the anode and replace it if it
has been reduced in diameter by
60% or more at any point on its
length.
5. Check for water leaks.
If it is necessary to replace the
Drawing 10 - Conversion to another gas
anode it should always be replaced by
one of the same type.
The type of anode required can be
determined on the basis of the type of
the appliance and the serial number.
2.8.2 Cleaning
1. Close the gas supply and demount
the burner after it has cooled down;
2. Disconnect the burner, pilot pipe and
thermo couple from the gas control
block (see drawing 11);
3. Remove the complete burner
assembly;
4. Clean the burner with a soft brush;
5. Check the pilot burner and clean it if
so required;
6. Check the combustion chamber, flue
tube and flue baffle and clean these
if required;
7. Re-mount in reverse order. Tighten
the thermo couple connection on the
gas control block hand tight and
tighten it further with a wrench to a
maximum of 1/4 turn as it only needs
to make contact.
After cleaning of the pilot- and main
burner the operation of these should be
checked. If necessary the burner
pressure of the main burner should be
reset.