Adisa NEO FIRE 120, Technical Manual Of Installation, Use And Maintenance

Page: 45 / 77

NEO FIRE – Technical Manual
45
16.3 Gas supply
The gas supply pressure, the gas flow and the dimensions of the gas connection, they all depend on the type of
gas used, according to the boiler installed and to the current regulations.
Gas connection: the installation company has to install a three-pieces coupling per boiler in order to facilitate
the dismantling and the maintenance of every boiler.
The boiler incorporates a small mesh. If the connecting pipe is not clean or has particles, the mesh will
immediately block them, so the installation company will have to install a gas filter before the boiler gas
connection.
If the boilers gas pressure is higher than the maximum value indicated in this manual, it is necessary to install a
gas pressure governor so that the inlet working pressure can be in accordance with the values required.
It is advisable to install a flue gas header previous to the boilers that will operate as a gas inertial tank when
the boilers start working.
When different consumptions are simultaneously required, the dimensions of the gas pipes and of the gas
connections must be calculated so that, when all the consumptions are demanded simultaneously, the inlet
working gas pressure to each boiler will correspond to the values indicated in this manual (see table
TECHNICAL DATA).
16.3.1 Gas pressure higher than 45 mbar
Units
Boiler model
Inertial
volume
m3
1 NEO FIRE 80 0,0074
1 NEO FIRE 120 0,0112
1 NEO FIRE 160 0,0149
1 NEO FIRE 200 0,0186
1 NEO FIRE 240 0,0223
1 NEO FIRE 280 0,0261
1 NEO FIRE 360 0,0335
1 NEO FIRE 450 0,0419
1 NEO FIRE 540 0,0503
1 NEO FIRE 630 0,0586
1 NEO FIRE 720 0,0670
1 NEO FIRE 810 0,0754
1 NEO FIRE 900 0,0838
2 NEO FIRE 360 0,0670
2 NEO FIRE 450 0,0838
2 NEO FIRE 540 0,1005
2 NEO FIRE 630 0,1173
2 NEO FIRE 720 0,1341
2 NEO FIRE 810 0,1508
2 NEO FIRE 900 0,1676
3 NEO FIRE 360 0,1005
2 NEO FIRE 450 0,1257
3 NEO FIRE 540 0,1508
3 NEO FIRE 630 0,1759
3 NEO FIRE 720 0,2011
3 NEO FIRE 810 0,2262
3 NEO FIRE 900 0,2513
A gas pressure governor must be installed to reduce pressure to
a value in accordance with the table of paragraph “Technical
data”. To select the type and its speed of opening/closing,
consult the Technical Department of ADISA HEATING BY
HITECSA.
An inertial tank must be installed between the gas pressure
governor and the boiler, acting as a gas inertial volume when
the boiler starts up and as an absorber/compensating of the
pressure rise produced by the closing of the gas pressure
governor when the boiler stops (see diagrams below).
Its volume will be at least equal to 1/1000 of the boilers
maximum flow per hour.
This inertial tank must be placed as close as possible to the
boiler.