Manual Eldom WH05039R (page 12 of 64) (English, German, Dutch, French, Italian)

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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

EN EN

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Eldom WH05039R Manual

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