AIR/GAS PREMIX BURNERS ACV BG 2000M/201
Operation
The power continually adjusts itself according to demand; this greatly improves the operating eciency
for heating and hot water.
The burner tube is covered with a metal bre (NIT), which, besides its remarkable heat exchange capacity,
guarantees longer burner life.
The burner’s main components are:
• a variable speed fan
• an automatic ignition and ame detection system
• a gas valve and venturi tube set specially developed for low NOx pre-mix air/gas burners
Gas pressure in the gas valve outlet is kept equal to the absolute air pressure in the venturi tube inlet,
corrected by the oset adjustment on the regulator.
The fan pulls the combustion air through the venturi tube whose neck is connected to the gas valve
outlet. The pressure dierential created at the neck of the venturi tube by the airow rate induces gas
intake proportional to its level (the larger the air ow rate, the greater the dierential and there is a larger
quantity of gas intake). The air/gas combination is then introduced into the burner via the fan.
THIS PRINCIPLE GUARANTEES SAFE AND QUIET OPERATION:
• In the event of low air flow, the differential across the venturi tube falls, the gas flow rate diminishes,
the flame extinguishes and the gas valve closes: the burner is then in safety mode.
• In the event of flue blockage or restriction, the air flow rate falls, and there are then the same reac-
tions as those described before causing burner stop in safety mode.
• The BG 2000-M burner installed on the HeatMaster® 201 model is controlled by an ACVMax Hon-
eywell controller which manages both the burner safety function and its modulation according to
temperature.
1. Ignition and ionisation electrode
2. Burner tube
3. Burner insulation
4. Flame sight glass
5. Fan
6. Venturi tube
7. Gas valve
8. Gas connection
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