WATER CONNECTION
To prevent vibrations and noise in systems, avoid using pipes of small diameter, avoid using tight elbows and
sharp reductions in flow cross-section and hot flushing of the system is recommended to eliminate impurities
originating in pipes and radiators (particularly oil and grease) that could risk damaging the pump.
GAS - NOZZLE CALIBRATION
The boilers leave the factory calibrated and ready to operate with NATURAL GAS and LIQUID GAS.
For proper calibration, see the table below:
Gas type
NATURAL GAS
(G20-20mbar)
LIQUID GAS B
(G30-28/30mbar)
LIQUID GAS P
(G31-37mbar)
BURNER PRESSURE CURVES - OUTPUT
TREND 28 MBS
kPa
mbar
3,5
35
3
30
27,5
2,5
25
2
20
1,5
15
13
1
10
7,6
5,7
0,5
5
2,4
0,1
1
0
0
0
Slow ignition adjustment
3 mbar NATURAL GAS (28 MBS) - 3 mbar NATURAL GAS (32 MBS)
8 mbar LIQUID GAS (28 MBS) - 6 mbar LIQUID GAS (32 MBS)
Jets pressure mbar
32 MBS
28 MBS
min.
max.
min.
2,4
1,8
13
5,7
5
27,5
7,6
5,2
35
P 35
B 27,5
GN 13
10
15
20
25
30
Delivery
28 MBS 32 MBS
m
3
/h
m
max.
3,1
11,5
0,89
25,4
33
1,17
mbar
35
30
25
20
15
10
5
1
0
kW
35
Burner jets
28 MBS 32 MBS
3
/h
Ø mm.
3,47
1,25
1,01
0,77
1,32
0,77
TREND 32 MBS
5,2
1,8
0
10
15
20
30
L.C.V.
kcal/h
Ø mm.
8.550
1,35
29.330
0,80
0,80
22.360
P 33
B 25,4
GN
11,5
kW
25
30
35