3342
5
GB
3.4 FUEL SUPPLY
The burners are teamed with one-piece pneumatic proportioning gas valves, via which the amount of gas
delivered, and hence the output produced, can be modulated.
A signal reporting pressure detected in the air circuit is carried to the pneumatic gas valve, which delivers an
amount of gas in proportion to the airflow produced by the fan.
The gas train, in order to render the dimensions efficent is assembledd directly onto the burner body.
D7453
Note
With the valve/manifold connection, accidental blocking of
the intake can be compensated by reducing the amount of
gas delivered.
Air/gas mixer
Gas and combustive air are mixed
inside the purging circuit (mixer),
s t a r t i n g f r o m t h e i n t a k e i n l e t .
Through the gas train, fuel is intro-
duced into the intake air current
and optimal mixing commences
with the aid of a mixer.
Gas valve
Valve model
Honeywell VR4615VB1006
Mixer model
Honeywell 45900450-010
Gas line connection
3/4" inlet
Working temperature
-15°C/70°C
Max. working pressure
30 mbar
Min. working pressure
15 mbar
Max. inlet pressure
60 mbar
Valve class
B + C
Electrical supply
220-240 V
IP
IP 40 according to IEC 529
D7452
Minimum gas flow
adjustment on the
stabiliser (V
2
)
Gas supply
Gas pressure
test point
upline (P
1
)
Gas valve
Maximum flow
adjustment (V
1
)
Air/gas mixer
in the suction
circuit
Manifold
GAS TRAIN ASSEMBLY
Gas
compensation pipe
