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The pump anti-blocking function permits to exclude blocking of the pump shaft in case of the boiler's long-
term idleness. This function works only in standby mode. Once in 24 hours the pump is launched for 15
seconds.
3.3.3. Boiler's operation in heating mode with an external (outdoor) temperature sensor
For an optimal temperature regulation in the heating circuit depending on external temperature it is
recommended to use an external (street) temperature sensor. The correction of water temperature in the
heating circuit is effectuated in accordance with the external temperature and regulation coefficient Kd (see
Scheme 4)/ The electronic boar automatically discerns the presence of an external sensor and effects the
temperature regulating function. At water temperature setting in the heating circuit the value of the Kd
coefficient is shown on the boiler's control panel's display instead of the temperature value. The regulation
coefficient may be set in a range between 0 and 9,9. Please see the recommendations on connection of the
external sensor in p. 10.3.3 , page 21.
T. external
Scheme 4. Schedule of dependency of the temperature in the CH from the external temperature.
3.3.4. Boiler's operation at low /high source voltage
When the source voltage comes outside the range 190 ÷ 250 V the electronic board renders the boiler into the
standby mode. At this moment the symbol – is shown on the boiler's display and the boiler does not react on
pushing the control buttons.
In 30 seconds after voltage recovery in the range of 190 ÷ 250 V the boiler's operation is automatically
restored in the mode in which the boiler was before, before voltage comes outside the range 190 ÷ 250 V.
4. BOILER SERVICE
In order to provide long-term and failure-free boiler operation and to keep its operational characteristics it is
necessary to regularly effect the examination, treatment and technical service of the boiler.
Examination and treatment must be effectuated by the boiler's owner.
Boiler technical service can be effectuated only by a specialized service organization not less than once a
year. The recommended time for technical service if before the heating season.
Boiler technical service might be required more often than once a year, in case of intensive work of the boiler
in a premise where there is much dust in the air or in case of higher water hardness. The unscheduled boiler
cleaning must also be effectuated also in case if in the premise where the boiler is installed there were
construction or reparation works and much construction dust and waste got into the boiler.
CAUTION! Works connected with technical service are not warranty liabilities of the manufacturer
company and are effectuated by the customer's cost.
4.1 Examination
Every time before putting the boiler into operation during the heating season once a day, it is necessary to:
-
Make sure that there are no highly flammable objects next to the boiler or next to the smoke exhauster;
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Make sure that there is no smell of gas inside the premise, is the smell of gas in the premise was detected you
must address to the gas facilities service;
-
Make sure that there are no water leaks in the heating and hot water supply systems, in case if leaks are
detected you must address to a special service organization;
-
Make an external examination of the smoke exhauster in order to detect damages. If smoke exhauster damages
are detected, you must address to a special service organization.
4.2 Boiler treatment
-The water filters of the heating and DHW supply systems must be cleaned regularly, especially before the
beginning of the heating season. The DHW filter must also be cleaned at water flow reduction in the
DHW supply line;
User's manual
T. of the heating circuit
User's manual
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