Maintenance; Sacrificial Anode; Cleaning - State Water Heaters PRV 30 NORS G Installation And User Instructions Manual

Figure 10 - Conversion to another gas
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 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 pres-
sure of the main burner should be reset.
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