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2.5
Maintenance
The heater must be checked and cleaned regularly (at
least once a year) by an accredited installer, so that
correct operation is guaranteed. The bar burners, control
and safety valves, the glow igniter and anodes must also
be checked
.
2.6
Anode
The life of the anode is determined by the quality and
quantity of the water flowing through the heater.
Therefore, we recommend that the anode is checked
regularly - preferably simultaneously with an internal
inspection of the glass lined tank. In order to determine
the frequency with which the anodes must be replaced,
the water side of the boiler must be checked three
months after installation. The anodes must be replaced if
more than 60% has dissolved at any point on their length.
To inspect the tank:
1. Close the cold-water inlet tap;
2. Empty the heater completely by opening the drain
valve;
3. Remove the covering plates on the heater's outer
jacket;
4. Remove the access cover plates form the tank by
unscrewing and removing the bolts and washers,
(see figure 6);
5. To ensure watertightness of the access covers the
rubber O-rings must be replaced when the access
covers are refitted, (see figure 6).
Figure 6: Inspection hatches.
To inspect the anodes:
1. Remove the draught diverter;
2. Unscrew the fastening screws on the lid edge;
3. Remove the lid. The hexagonal heads of the anodes
are now visible, (see figure 7);
4. Unscrew the anodes with the appropriate spanner
and replace with new anodes if required. Attention:
the anodes must make contact with the tank (metal
on metal). If the tank and the anodes are separated
electrically (as a result of the sealing material used),
the anode cannot function. This could have a
negative effect on the operating life of the tank;
5. Assemble everything in reverse order;
6. Fill the heater and test.
16
Figure 7: Anodes
2.7
Descaling
Calcium deposition depends on the type of water and the
demand. In addition, calcium deposition increases at high
water temperatures. A temperature setting of 60°C is
recommended, which will keep calcium deposition to a
minimum.
Access covers are located on the right and left sides for
inspecting and descaling the tank. The access covers
can be reached via the covering plates on the outer
jacket.
Empty the heater before opening the access covers.
Descaling must be carried out with a suitable substance.
Consult the supplier or installer.
2.8
Condensation
When the heater is filled with cold water or the hot-water
consumption is very high, the flue-gases will condense
on the cold surfaces of the combustion chamber and the
flue-gas discharge pipes. The drops of water will fall on
the burner and cause a hissing sound. This is normal and
will stop as soon as the operating temperature has been
reached.
2.9
Spare parts
It is important to mention the heater, type, model and full
serial number when ordering spare parts. The spare parts
can be determined according to these numbers.
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