6
GB
TECHNICAL DATA
Model
G 700
G 1000
Type
Two-stage progressive or modulating
Functioning
Intermittent
Regulation
Air/gas proportional valve
Maximum heat output
KW
748
979
Minimum heat output
KW
135
152
NO
x
class
-
2
2
Gas category
-
G20 / G30-G31
Maximum gas flow rate (15°C - 1013.5 mbar)-natural gas
m
3
/h
79
103
Minimum gas flow rate (15°C - 1013.5 mbar)-natural gas
m
3
/h
14
16
Electric protection rating
IP
20
20
Motor electric power supply (three phase)
V / Hz
400 / 50-60
*
400 / 50-60
*
Auxiliary electric power supply (single phase)
V / Hz
230 / 50
230 / 50
Max. absorbed power
W
740
1100
Transformer (voltage/secondary current)
KV / mA
15 / 48
15 / 48
Functioning temperature (min/max)
°C
0 / 40
0 / 40
Noise
dbA
80
81
Weight of the burner body (without ramp)
Kg
30
31
U
M
*
It is possible the 60 Hz power supply only with suitable electric motor.
WORK CURVES
Reference parameters for choosing blown air gas burners.
Blown air gas burners can be installed on both pressurised and vacuum boilers. It is essential to always refer to
the flow-pressure working curve as burner flow (expressed in kW) remains strongly linked to the pressure present
in the combustion chamber.
U
M
Example:
Boiler: power to hearth = 700 kW and
pressure in combustion chamber =
3.0 mbar.
The meeting point between the straight
lines of combustion chamber pressure
and power to the hearth must fall within
the operating range of the boiler (see
example image).
0,00
1,00
2,00
3,00
4,00
5,00
6,00
7,00
8,00
mbar
0
100
200
300
400
500
600
700
800
900
1000
kW
Pressure in the combustion chamber
Flow rate to the boiler furnace