73
The boilers leave the factory calibrated and predisposed to operate with NATURAL GAS or B/P. For the pre-
calibrations effected, see the related table below:
GAS - NOZZLE CALIBRATION
* = at 1013 mbar, 15
°
C
29 NS
25 NS
29 NS
25 NS
Model
Gas type
Min
Max
m
3
/h
2,62
Flow-rate
Ø mm
4,9
5,4
3,8
4,2
Burner
jet
Ø mm
21,0
23,5
21,0
23,5
Air
diaphragm
Calorific
value (*)
3,05
0,765
(G30)
1,01
(G31)
0,877
(G30)
1,15
(G31)
Kcal/h
8.550
29.330
22.360
29.330
22.360
8,8
9,0
9,8
10,0
CO
2
%
NATURAL
GAS
G20 - 20 mbar
B / P
G30 - 30 mbar
G31 - 37 mbar
BURNER PRESSURE CURVE - OUTPUT
kW
Epoca 25 NS
Epoca 29 NS
29.0
25.0
5800
5500
10.9
8.8
6000
5000
4000
3000
2000
1000
30
26
24
22
20
18
16
14
12
10
8
Electric fan speed
Field of job previewed for
operation like paragraph
“FLUE EXHAUST PIPE
INSTALLATION - SPECIAL
APPLICATIONS” page 56.