Eldom Invest 72324NMB Montage-, Betriebs- Und Wartungsanleitung Seite 12

EN
households. When a need for a large amount of mixed water is
required the thermostat knob is rotated in the direction of travel
counterclockwise to its maximum position, to reach the higher
temperature of the water in the tank. We recommend to keep the
knob in the sector ECO, when the heater is left on for long periods
without use of hot water and only to store heated water.
The appliance built-in thermostat unit has antifreeze function.
When the thermostat knob is to the extreme left, at the scale
beginning, the heater shall switch on at ambient temperature
around 8-10°C and shall switch off at about 12-15°C. Thus in case
of air temperature fall in the room, the water in the tank will be
protected from freezing. ATTENTION! This feature shall not
prevent the water in the room plumbing from freezing!
Within the combined valve of the water heaters under pressure is
built a special controller which during water heater normal
operation allows the expanded during heating water not to leak
through the valve side hole, but to pass into cold water plumbing.
The quantity of this water is negligible and usually is with low
temperature. During normal operation of the water heater, as well
as in present of additional return valve, it is possible that through
the valve side opening leak some water drops. This should not be
perceived as defect and the side hole of combined valve should
not be blocked because it shall cause destruction of the tank. The
built-in controller in the valve prevents, in case of cutting water
supply, the water in the water tank to return to cold water pipeline.
During the water warming in the water heaters with free outflow the
water expanded by temperature leaks from the fitting outlet. This is
not a defect! Do not try to stop the drip, as tightening the mixer
knobs - you can damage them!
WARNING! Do never switch the appliance if there is a chance
that the water in the water tank is frozen! This shall damage
both heater and the tank.
When the appliance is used in areas with soft water rich in limestone
it is possible to hear some noises during water heating. The noise is
due to the limestone stitching on the heater and contained within the
tank. The quantity of limestone contained depends of the type of
water and its heating temperature. When the latter is higher than
60°С the quantity of separate limestone increases. Accumulated
limestone impedes the heater efficiency and may even cause its
failure, while increasing the time for water heating.
When using the appliance it is possible to hear some weak noise
due to the water flow through the pipelines and the appliance, as
well as to the natural process of expanding and heating.
When the heater is regularly used to heat water to a lower
temperature, it is recommended to turn the thermostat knob at
least once monthly to its maximum position, then to heat the water
to maximum degrees and keep it such at least for 24 hours in order
to prevent bacteria formation.
CORROSION PROTECTION, PREVENTION,
MAINTENANCE
Enameled water heater tanks
In each water heater with enameled tank is installed additional
corrosion protection. It consists of an anode protector (anode) of
special alloy operating only when the water tank is full. The anode
is a consumable (i.e. a device with normal wear during the
appliance operation) and its average operational life is up to 3
(three) years. This period depends much of the type of operating
the appliance and the characteristics of the heated water. After
this period, a manufacturer authorized specialist or dealer service
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company must check the conditions of the anode. Where
necessary it should be replaced with new one. Compliance with
the inspection deadline and timely replacement of the anode is
important for the effective protection of the tank from corrosion.
Water heater with enamel tank and anode tester
The availability of this information device (Fig. 7) it is essential for
the operation of the heater. It consists of a arrow-indicating system
with a scale and switch (button). The scale has two sections - red
and green. In tank normal operating condition the tester pointer is in
the red section - the tester is not switched on and the anode is
working properly. Checking the anode efficiency is carried out
when the water is fully heated (the thermostat is in position OFF, i.e.
the key is not lit) by pressing for few seconds the button on the
tester. The arrow shall depart in the direction of the scale green
sector. The magnitude of the variation is strongly affected by the
parameters of the water and its temperature, as the boundary
between the two sectors correspond to the water average values.
The anode efficiency criterion is its arrow deflection. When at the
time of pressing the tester button, the arrow does not divert or is
hold at the beginning of the red section, you should contact the
specialists at your nearest manufacturer or vendor authorized
service company. They will review the corrosion protection and
repair it if necessary. The timely replacement of the anode protector
is a prerequisite for extending the life of the enameled water tank.
Water tanks of high quality chrome-nickel alloy steel
Corrosion protection and guaranteed long life are secured by
correct choice of steel, adequate design and engineering
construction during tank manufacture process.
SERVICE, PREVENTION, MAINTENANCE
In order to secure reliable operation of the water tank in areas with
highly calcareous water it is recommended to clean the limestone
accumulated within. This operation should take place at least once
every two years, while in areas with higher limestone content even
more frequently. The depositions on the enamel coating should not
be removed otherwise than wiped with dry cotton cloth and without
using hard tools. Regular limestone removal and cleaning is
particularly important for appliance reliable operation. It is
recommended that during this maintenance operation you carry
out a review of the enameled tank anode condition. These services
are not subject to warranty coverage and must be performed only
by qualified person.
WARNING! To ensure safe and trouble-free operation of
pressurized water heater must be checked if it is not reduced
permeability of its combined valve. This is done by lifting the
lever, and wait for 30-60 seconds from the side opening the
valve to flow thick and strong jet of water. This operation must be
carried out after connecting the heater to the plumbing and
when filling of the tank with water in the process of using the
heater not less than once every two weeks, as well as eventually
after stop and start of water supply. When at full tank by opening
the valve does not leak or water flow is weak, there is a failure
and probably the valve is clogged by impurities in the sewage.
Using water heater combined with a defective valve is strictly
prohibited. Switch off immediately the appliance from the power
supply and contact the nearest authorized by manufacturer
service company. Otherwise, it will cause damage to the water
tank, and could cause tangible and intangible damages in the
room where the water heater is located.
The water heater outer shell and plastic parts can be cleaned using