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In order to ensure fire safety it is necessary to carefully monitor cleanliness of the burners, not allow smoky flame during gas
combustion, which causes soot deposit on the heat exchanger. At the same time the gaps between the heat exchanger's fins are cov-
ered with soot, and consequently the flame casts out of the combustion chamber, what may lead to fire.
Examination and treatment are performed by the owner of the appliance.
The appliance's technical service is performed by a specialized service organization not later than in 12 months after the appli-
ance's installation and after that not less often than once in 12 months.
ATTENTION! The works connected with technical service are not the manufacturer company's warranty liabilities and
are effectuated at the consumer's cost.
.
12.1. Examination
12.1.1. Every time before switching the appliance on it is necessary to:
- Make sure that there no flammable items close to the appliance;
- Make sure there is no smell of gas in the premise, in case of detecting the smell of gas in the premise it is necessary to call the
gas facilities emergency service.
12.1.2. After the main burner's ignition it is necessary to visually check its operation: the flame must be blue, straight and with-
out any yellow smoky edges which indicate the contamination of the inner channels of the burners' blades.
Contamination of the burner blades' inner channels causes incomplete gas combustion, what leads to the following phenomenon:
-Appearance of large amounts of the carbon monoxide (sweetdamp) which can cause poising;
-Appearance of large amounts of soot and its deposit on the heat exchanger which worsens heat exchange and may lead to the ap-
pliance's breakdown.
12.2. Treatment
12.2.1. The appliance should be kept clean, for this it is necessary to regularly remove dust from the appliance's upper surface,
and also to wipe the casing at first with a wet rag, then by a dry one. In case of sustainable contamination, it is necessary to wipe the
casing first with a wet rag moistened in a neutral detergent, and then with a dry one.
12.2.2. It is forbidden to use detergents of heightened effect and containing abrasive particles, gasoline or any other organic sol-
vents for cleaning the surface of the casing and plastic parts.
ATTENTION! It is allowed to perform all operations for the appliance's treatment only after the appliance is switched
off and has cooled down.
12.3. Technical service
During technical service the following operations are performed:
- Burner cleaning;
- Heat exchanger cleaning from soot and cleaning (washing) the pipes of the heat exchanger from scale deposit(if necessary);
- Sealings replacement in the water and gas systems;
- Testing water and gas systems on air-tightness;
- Checking the thermo relay's(draught sensor) operation;
- Lubricating the moving connections (if necessary);
- Special cleaning of the appliance (also from dust in the inner units and details).
ATTENTION! Operations concerning the appliance's technical service, connected with disassembling of its gas and
water pipelines, must necessarily be performed after the appliance's complete switching off ( the taps on the appliance's inlets
on water and gas lines must be closed).
12.3.1. Burner cleaning
To clean the burner it is necessary to perform the following operations:
a) Switch the appliance off and close the gas stop valve;
b) remove the casing (see p.7.2.1), remove the burner and disconnect the manifold from it;
c) remove dust from the external surfaces of the burner and manifold by means of brush;
d) wipe the manifold and nozzles with a wet rag;
e) remove dust from inner channels of burner's blades by means of brush-cleaner;
f)
clean the electrodes of the plug and flame sensor from soot deposit and clean its contacts
g) Wash the burner with soap solution, especially inner surfaces of its blades by means of a brush-cleaner, thoroughly wash it in
running water, dry it and place back.
Keeping the burners clean will keep the heat exchanger from soot contamination and increase its working lifespan.
12.3.2. Heat exchanger cleaning
If the heat exchanger is contaminated, it is necessary to clean its surfaces where soot has appeared and the heat exchanger's
pipes where scale deposit has appeared.
In order to remove soot it is necessary to:
a) Remove the heat exchanger and put it into cold soap solution or any other synthetic detergent;
b) Keep it in soap solution for 10-15 minutes and clean the contaminated surfaces by means of a soft brush, then wash it
under a strong stream of water;
c) Repeat all the process if necessary.
In order to remove scale deposit it is necessary to:
a) Remove the heat exchanger and put it into a tank;
b) Prepare a 10% solution of citric acid(100 g of powder citric acid for 1 l of warm water);
User's and technical staff manual
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