Green Heating Technology
23
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Proceed with the hydraulic, gas, electrical and flue connections following the instructions and warn
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ings reported in the following paragraphs.
The connections of the boiler are engineered to fit plain couplings with screw ring, interposing
a plain gasket of suitable size and material, that ensure a reliable seal even without excessive
tightening force. They are NOT suitable for hemp, teflon tape or similar materials
Remark:
the lower grid is spare inside packing, not assembled. We suggest to fix the grid only at the
end of the boiler installation operations.
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For air inlet and flue outlet ducts connection, please refer to "Flue systems" on page 27, where
measures are referred to the upper edge of boiler’s body.
Hydraulic system (DHW and heating)
Make sure that the hydraulic and heating systems ducts
are not used as earth connections of
the electrical system
. They are absolutely NOT SUITABLE for such a use. Besides: they don't
guarantee the earth dispersion; in case of electrical fault they could generate a fulguration risk;
there could take place galvanic currents in the pipings and consequent corrosion and hydraulic
leaks.
Advices and suggestions to avoid vibrations and noises in the system
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Do not use pipes with reduced diameters;
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Do not use bends with small radius and reductions of important sections.
Cleaning and preservation of the systems
The efficiency, the reliability and the safety of the boilers, as all generic thermal systems and compo
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nents, depend strictly on the features of the water that supply them and on their treatment.
A proper treatment of the water improves the protection of the systems against corrosions (and there
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fore perforations, noise, leaks, etc.) and limestone incrustations that drastically reduce the efficiency
of the thermal exchange (consider that 1 mm of limestone incrustations reduces of 18% the thermal
exchange of the heating element on which it has been formed).
ITALTHERM guarantees its products only if the characteristics of the water comply with UNI 8065, re
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ported also in laws on energy saving.
Thoroughly wash the heating system with water, before connecting the boiler. This will elimi
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nate residual like welding drops, slag, hemp, mastic, mud, rust and other dirt from pipes and
radiators. Otherwise, these substances could enter the boiler and damage the internal compo-
nents (pump etc.).
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In case of old or very dirty systems, to wash them use specific, proven efficiency products, in the
suitable quantity and following the instructions of its manufacturer.
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If the water on boiler inlet is harder than 25° fr, it’s required to install a softener to bring the hardness
below that value, as required by the reference regulation.
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For floor system and generally all low temperature systems, the water treatment product must have
filming action (protection against corrosion and incrustation) and action against bacteria and algae.
