Italtherm CITY BASIC - Hydraulic System and Filling

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
Make sure that the hydraulic and heang systems ducts 
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 fulguraon risk;
there could take place galvanic currents in the pipings and consequent corrosion and hydraulic
leaks.
Advices and suggesons to avoid vibraons and noises in the system
f Do not use pipes with reduced diameters;
f Do not use bends with small radius and reducons of important secons.
Cleaning and preservaon of the systems
The eciency, the reliability and the safety of the boilers, as all generic thermal systems and compo-
nents, depend strictly on the features of the water that supply them and on their treatment.
A proper treatment of the water improves the protecon of the systems against corrosions (and there-
fore perforaons, noise, leaks, etc.) and limestone incrustaons that drascally reduce the eciency
of the thermal exchange (consider that 1 mm of limestone incrustaons reduces of 18% the thermal
exchange of the heang element on which it has been formed).
ITALTHERM guarantees its products only if the characteriscs of the water comply with UNI 8065, re-
ported also in laws on energy saving.
Thoroughly wash the heang system with water, before connecng the boiler. This will elimi-
nate residual like welding drops, slag, hemp, masc, mud, rust and other dirt from pipes and
radiators. Otherwise, these substances could enter the boiler and damage the internal compo-
nents (pump etc.).
f , in the
suitable quanty and following the instrucons of its manufacturer.
f If the water on boiler inlet is harder than 25° fr, it’s required to install a soener to bring the hardness
below that value, as required by the reference regulaon.
f For oor system and generally all low temperature systems, the water treatment product must have
lming acon (protecon against corrosion and incrustaon) and acon against bacteria and algae.
Heang system
f Connect the safety evacuaon ducts of the boiler to an evacuaon funnel. If safety valves are not
connected to an evacuaon device, their intervenon could ood the room. The manufacturer can-
not be held responsible for any damage arising from that situaon.

Once all system connecons have been carried out, proceed with system lling. This operaon should
be made with care, respecng the following steps:
f Open the radiators venng devices;
f Check that the plug of the automac air vent, incorporated in the boiler circulator, is unscrewed: if
not, unscrew it and leave it unscrewed, even aerwards, for normal operaon;
f If it's required to ll the system with an-freeze soluon, do this operaon, then hermecally close
the connecon or the valve used to put the soluon in, to allow the pressurizaon.
f Gradually open the lling cock 1 ;