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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 non-return valve in the combined valve
prevents, in case of cutting water supply, the water in the water
tank to return to cold water pipeline.
Using the built-in heater exchangers (for appliances equipped
with) to heat the water in the tank must take place in accordance
with the instruction provided for by the persons who carried out the
design and installation of the system for heating water from
alternative electric sources. Compliance with the instruction in
such guides is mandatory.
When the appliance is used in areas with water rich in limestone it
is possible to hear some noises during water heating. The noise is
due to the limestone deposition on the heater and in 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. The
purpose it to prevent bacteria growth.
ADDITIONAL CORROSION PROTECTION
Enameled water heater tanks. In each water heater with
enameled tank is installed additional corrosion protection. It
consists of an 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 the period of operational life, a manufacturer
authorized specialist or dealer service 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. Both the assessment and replacement
of the anode are not subject of manufacturer and seller warranty
liabilities.
Water heater with enamel tank and anode tester. The
availability of the anode tester as control device is essential for the
heater operation. Some water heater modifications with traditional
thermostat are equipped with electromechanical anode tester
(Fig. 9). 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 (switched off thermostat, 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
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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.
Their specialist shall review the tank corrosion protection and
repair, if necessary. In some water heaters modifications the
electronic control board indicates the anode efficiency and degree
of wear with periodic regular display blinking. With advanced wear
the size of lighted part decreases. More specifically the process is
described in the additional instruction manual concerning the
electronic control board functions. Once the lighted part of the
display switches off completely you may contact the closest
service company to review and eventually replace the anode.
Water tanks of high quality chrome-nickel 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! In order to ensure safe and trouble-free operation of
the water heater, the combined valve should be checked
regularly for reduction of its permeability. 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.
When you are not certain about the temperature in the room where
the water heater is installed, i.e. that it may fall below 0°C, the
water from the water tank MUST be drained - please refer to
section 'CONNECTION TO THE WATER SUPPLY NETWORK'
The water heater outer shell and plastic parts can be cleaned using
only a slightly damp soft cotton cloth and never with invasive and/or
abrasive substances and preparations. Before cleaning the
appliance, it MUST be disconnected from the power supply with the
additional disconnection device or by unplugging the plug on the
power cord. IT IS FORBIDDEN to clean the appliance with steam
generator. Particular attention should be paid to prevent wetting of
the appliance light switch on its control panel. The water heater may
be switched on in operation only after complete removal of
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