Sime PLANET 25/60 BF, Manual

Page: 91 / 160

should have a hardness of no more than
20°F. In all cases the water used should be
tested and adequate treatment devices
should be installed. To prevent lime scale or
deposits on the primary exchanger, the
water used to supply the heating circuit
should must be treated in accordance with
UNI-CTI 8065 standards. It is absolutely
essential that the water is to be treated in
the following cases:
– very extensive system (with high con-
tents of feedwater);
– frequent addition of makeup water into
the system;
– should it be necessary to empty the
system either partially or totally.
2.5 SYSTEM FILLING
The filling of the boiler and the system is
done by the filling cock located on the bot-
tom of the boiler (fig. 7).
The filling pressure of the system cold
must be
1 bar . Once the filling has been
completed, close the filling cock.
2.6 FLOW REGULATOR
At the inlet of the hot water a flow regula-
tor is installed, from 10 l/min (yellow) for
the
“25/60” version and from 12 l/ min
(brown) for the “30/60” version.
2.7 COAXIAL DUCT
The air inlet-smoke outlet assembly ø
60/100 is supplied in kit code 8084805
and comes with an instruction sheet for
the assembly.
2.7.1 Diaphragm installation
The diaphragm is supplied together with
the
“30/60 BF” boiler. See figure 8 for the
positioning.
ATTENTION: Install the diaphragm only
when the length of the ø 60/100 coaxial
duct is less than 1 m.
2.7.2 Coaxial duct accessories
The accessories necessary for the realisa-
tion of this type of installation and some of
the connecting systems that can be used
are shown in fig. 9.
With the elbow supplied
in the kit the maximum length of the duct
should not be greater than 3 metres. If
the extra elbow cod. 8085601 is used the
duct could reach the maximum length of
1.6 metres. With the use of the vertical
extension cod. 8086902 the end of the
duct must always have an horizontal outlet.
2.7.3 Positioning the outlet terminals
The outlet terminals for forced-draught
appliances may be located in the external
perimeter walls of the building.
To provide some indications of possible solu-
tions,
Table 1 gives the minimum distances
to be observed, with reference to the type
of building shown in fig. 9.
89
Fig. 7
Fig. 8
KEY
1a-b Coaxial duct kit code 8084802
2
Extension L.815 code 8084800
3 Vertical extension L.584 code 8086900
4 Supplementary 90° elbow code 8085600
Fig. 9
CLOSE
Fig. 7/a
Fig. 10
IMPORTANT:
Each additional 90° curve installed reduces the
available length by 0.90 metres.
Each additional 45° curve installed reduces the
available length by 0.45 metres.