Emptying The System; Duct Installation - Sime RX 26 BF Manual Del Usuario

2.2. 1 Filter on the gas pipe
The gas valve is supplied ex factory with an
inlet filter, which, however, is not adequate
to entrap all the impurities in the gas or in
gas main pipes.
To prevent malfunctioning of the valve, or in
certain cases even to cut out the safety
device with which the valve is equipped,
install an adequate filter on the gas pipe.
2.3 CHARACTERISTICS
OF FEEDWATER
To prevent lime scale or deposits on the pri-
mary exchanger, the water used to supply
the heating circuit should must be treated
in accordance with UNI-CTI 8065 stan-
dards.
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.
2.4 SYSTEM FILLING
The charge pressure, with the system cold,
must be between 1 and 1.2 bar.
During system filling you are recommended
to keep the main switch turned OFF.
Filling must be done slowly so as to allow
any air bubbles to be bled off through the
air valves.
At the end of the operation, make sure that
the cock has been properly closed.
2.5 EMPTYING
THE SYSTEM
Use the drain tap to empty the system.
Turn off the boiler before doing this.
2.6 FLUES/CHIMNEYS
The flue or chimney used to release the
products of combustion into the atmosphe-
re must comply with the requirements pro-
vided by the UNI 10641 regulations relative
to forced draught boilers (type C).
2.6. 1 Passing flue pipes
through an
existing chimney
When renovating or passing flue pipes
through an existing chimney, use only flues
which are declared suitable for the purpo-
se by the manufacturer, following the
instructions for installation and use provi-
ded by the manufacturer and by the pre-
scriptions of the UNI 10845 regulations.
TYPE OF INSTALLATIONS
C12 Wall outlet and intake exposed to the same wind conditions.
C32 Roof outlet and intake exposed to the same wind conditions.
C42 Outlet and intake in common separated flues, but exposed to the same
wind conditions.
KEY
1 Coaxial duct code 8084815
2a Extension L. 1000 code 8096103
2b Extension L. 500 code 8096102
3 Extension L. 194 c/w air-smoke intakes code 8086908
4 Additional 90° elbow code 8095801
5 90° elbow c/w air-smoke intakes code 8085604
6 Articulated tile code 8091300
7 Roof outlet terminal L. 1284 code 8091200
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.
2.7 ø 60/100 COAXIAL

DUCT INSTALLATION

The boiler is supplied with the connections
required for coaxial ducts that can be
turned in any direction.
The maximum horizontal length of the
duct must not exceed 3.7 meters.
Maximum two extensions can be inserted
on the C32 type installation in order to
reach the straight vertical length of 3
meters, including the concentric elbow
that comes out from the boiler.
Use only original SIME accessories and
make sure that the connection is carried
out properly, as indicated in the instruc-
tions attached to the accessories. The dia-
grams of fig. 3 show a few examples of
coaxial ducts kind of installations.
2.7. 1 Axial duct diaphragm
The boiler is supplied as standard with a ø
81 diaphragm that must be installed only
when the linear length of the discharge
duct is less 1.5 meters. For information
on the location on the diaphragm, see
figure 3/a.
IT
ES
PT
GB
Fig. 3
Fig. 3/a
39