Servicing
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10.4 Connecting to the Heating System and Water Filling
Water for filling the boiler and the heating system must be clear and colorless, with no suspended substances, oil and chemically aggressive
substances. The parameters of circulation and refilling water shall meet tab. no. 3.
When the water hardness does not meet the required parameters, it shall be treated accordingly. Several times reheated water with a higher
hardness does not prevent precipitation of salts on the walls of the boiler body. The precipitation of limestone decreases the heat transfer from
metal to water at the particular point by 10 %.
During the heating season it is necessary to keep a constant volume of heating water in the heating system and be particular about bleeding the
heating system. The water from the boiler and the heating system shall never be discharged or taken for some other use except in cases of
emergency like repairs etc. Draining of the heating water and filling new water increases the danger of corrosion and scaling. If it is necessary
to refill water into the heating system, then add water only when the boiler is cold.
When adding water to the boiler, the system shall be disconnected from electric power supply. The bleeding valve on the boiler and on the
heating system shall be functional and open. Adjust the expansion reservoir to a pressure which is higher by 10 kPa than the required pressure
in the heating system. The system will be pressurized to the required pressure of approx. 100 kPa and it will be vented again. We recommend
using the filter on the inlet to the heating system for water filling.
The heating system shall have a sufficient number of venting points. The lowest point of the heating system shall be equipped with a drain
valve.
10.5 Gas Connection
Prior to connecting the gas pipeline to the boiler, the gas pipeline shall be tested and subjected to revision inspection. After connecting the boiler
to gas pipeline, all gas connections shall be tested again by means of a detector or foaming solution. The input pressure of natural gas shall
correspond to the value in table no. 1.
While checking the tightness of the gas distribution and the valve connection, it is necessary to be careful not to wet the coil of the
gas valve!
10.6 Electric Power Supply Connection
The boiler is equipped with a flexible mains supply and a plug. According to SN EN 60 335–1 ed. 3 the boiler shall be placed in such
a way that ensures that the plug is freely accessible.
A 230 V/50 Hz socket should be located beside the boiler within a distance of 1.5 m. The socket shall correspond to the effective regulations
and it shall be subjected to revision inspection.
10.7 Condensate Discharge
A built-in siphon (trap) serves as the condensate outlet. It must be connected to a sewerage overflow. Prior to the commissioning of the boiler, it
is necessary to check whether the condensate is being drained. The size of a PVC drain pipe is Ø 24 mm. The pH value of this condensate is >
pH 3.
The boiler condensate outlet shall be implemented in such a way that ensures that it does not prevent fluent discharging of the condensate.
The boiler is equipped with an odor trap (siphon) that needs to be filled with approx. 100 ml of water before starting of the boiler. Discharging of
the condensate to the sewerage is governed by the national or regional (local) regulations. The drain pipe inclination shall be at least 5° from the
boiler to the sewerage and it shall not be blocked in any way (when the condensate drain pipe is blocked, the boiler furnace will resonate).
10.8 Flue Gas Ducting
See chapter 11 - Flue Gas Ducting
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