17
2.7
MAINTENANCE
The heater must be checked and cleaned regularly (at
least once a year) by an accredited installer, so that
proper operation is guaranteed. The bar burners, the pilot
burner and the control and safety valves must also be
checked.
2.8
ANODE
The life of the anode is determined by the quality and
quantity of the water flowing trough the heater. Therefore,
we recommend that the anode is checked regularly –
preferable simultaneously with an internal inspection of
the enamelled 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
cock.
3
Remove the covering plates from the inspection
hatches on the heater’s outer jacket
4
Open the handholes and inspect the anodes.
Replace the cardbord gaskets, rubber o-rings,
washers and bolts, to ensure the handholes are
watertight if they have been open (see figure 15).
Fasten the bolts with a maximum torque of 50 Nm.
Diagram 16 – Replacing the anodes
5
Assemble everything in reverse order
6
Fill the heater
2.9
DELIMING
Calcium deposition depends on the type of water and the
demand. In addition, calcium deposition increases at
high water temperatures. A temperature setting of 60ºC is
recommended, which will keep calcium deposition to a
minimum.
Inspection hatches are located on the right and left sides
for inspecting and deliming the tank. The inspection
hatches can be reached via the covering plates on the
outer jacket.
Empty the heater before opening the inspection hatches.
Deliming must be carried out with a suitable substance.
Consult the supplier or installer. Replace the cardbord
gaskets, rubber o-rings, washers and bolts, to ensure the
handholes are watertight if they have been open (see
figure 15). Fasten the bolts with a maximum torque of 50
Nm.
2.10
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-gases 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.
2.11
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.
Diagram 15 – Closing the inspection hatches
To inspect the anodes:
1
Dismantle the draught diverter
2
Unscrew the fastening screws on the lid edge.
3
Remove the lid. The mounting brackets the anodes
are now visible (see diagram 16)
4
Unscrew the anodes with the appropriate tools 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.
IM D 0 23 5