The boiler must be installed in a fixed loca-
tion and only by specialized and qualified
firms in compliance with all instructions
contained in this manual.
Furthermore, the installation must be in
accordance with current standards and
regulations.
2.1
BOILER ROOM
AND VENTILATION
The
“LOGO”
version boilers with less than
35 kW power can be installed in domestic
environments when simply replacing or in a
plant room complying with current stan-
dards In rooms where open chamber gas
appliances are installed, it is important that
at least as much air at least as much air
can arrive as required by normal combu-
stion of the gas consumed by the various
appliances.
The minimum distance between the boiler
and inflammable materials has to be
≥
200
mm. Consequently, it is necessary to make
openings in the walls for the air inlet into
the rooms (around 2 m
3
/h for each kW of
heat input). These openings must meet the
following requirements:
–Have a total free section of at least 6
cm
2
for every kW of heat input, with a
minimum of 100 cm
2
.
–They must be located as close as possi-
ble to floor level, not prone to obstruc-
tion and protected by a grid which does
not reduce the effective section required
for the passage of air.
2.2
CONNECTING UP SYSTEM
Before proceeding to connect up the boiler,
you are recommended to make the air cir-
culating in the piping in order to eliminate
any foreign bodies that might be detrimen-
tal to the operating efficiency of the applian-
ce. It is always advisable to put intercepting
sluice gates on the C.H. flow and return
tubes. The gas connection must be made
using seamless steel pipe (Mannesmann
type), galvanized and with threaded joints
provided with gaskets, excluding three-piece
connections, except for initial and end con-
nections. Where the piping has to pass
through walls, a suitable insulating sleeve
must be provided.
When sizing gas piping, from the meter to
the boiler, take into account both the volume
flow rates (consumption) in m
3
/h and the
relative density of the gas in question.
The sections of the piping making up the
system must be such as to guarantee a
supply of gas sufficient to cover the maxi-
mum demand, limiting pressure loss
between the gas meter and any apparatus
being used to not greater than:
–1.0 mbar for family II gases (natural gas);
–2.0 mbar for family III gases (butane or
propane).
94
2
INSTALLATION
1
2
3
4
2
5
6
7
8
9
10
11
12
15
13
14
Fig. 3/b
“LOGO 32/80 OF” version
KEY
1 Control panel
2 Non return valve
3 Air vent valve
4 D.H.W. circulating pump
5 C.H. circulating pump
6 Manual filling group
7 Magnesium anode
8 D.H.W. tank drain cock
9 D.H.W. tank
10 Boiler drain cock
11 Burners manifold
12 Pilot burner
13 Gas valve
14 Gas pressure switch
15 Ignition transformer
