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optimum temperature at which the heat losses of the device are reduced
and the reduced use of electric energy. At the same time, the warm water is
sufficient for normal 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!
Switching on and off, set up and using water heaters equipped with
electronic control board takes place in accordance with the instructions and
requirements listed in the additional manual supplied with the appliance -
instruction how to connect and use an appliance with electronic control
board. For such appliances the additional instruction manual is an integral
part of the present installation and operation manual.
The temperature indicator installed on the appliance external coating
indicates the process of water heating. It is not a device for control
measurement and indicates only the approximate temperature and quantity
of hot water within the water tank.
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.
WARNING! This appliance may be used by children of age over eight
years old and persons with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, where they are under
supervision or instructed about the safe use of the appliance and
understand the dangers. Children must not be allowed to play with the
unit! It is absolutely forbidden that children undertake cleaning or
servicing of this appliance!
Within the combined valve is built a special valve 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 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 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
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