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Nordgas Duo
Technical data
Electronic board:
• Mains voltage 230Vac +10 / -15%
• Mains frequency 45 ÷ 66Hz
• Operation temp. -20 ÷ +60 °C
• Stocking temp. -20 ÷ +80 °C
• Humidity max 90%@40°C non cond.
• Safety class Up to IP44
Constructional features
Gas valve:
• Body of aluminum alloy
• Tap for inlet and outlet pressure check
Specifications for use
• Installation site all sites
• Gas families 2°-3°
• Maximum operating pressure for use 50mbar
Mechanical connection
• Connection gas in and out female 1/2”
• Pilot outlet (optional) male 1/8” gas
• Outlet for pressure tap Ø 9 mm
Electrical features
• Gas cut-off supply 19Vcc < 0.8W
• Motor supply 19Vcc 350 mA
Gas cut-offs and pressure regulator
• Opening time cut-offs > 1,2s
• Closing time cut-offs < 1s
• Cut-off EV1 Class C
• Cut-off EV2 Class B
• Pressure regulator Class C
• Max power Up to 50 Kw
• Pressure regulated at outlet 9 ÷ 37mbar
Diagrams showing the operating cycle
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Applications
The integrated combustion kit Nordgas “DUO”, gas valve + safety and management
electronic board,have been designed to control gas driven appliancewith atmospheric
burner with or without combustion fan.
Most common use of these devices is in:
Gas boilers
Warm heat generators
Gas ovens
Gas dryers
Radiant tubes
Gas hot water boilers
Machines with combustion inside
General features
Electronic driver and burner control:
• In compliance with standard EN298 / 2003 (European standard for automatic flame
programming and checking in gas-driven burners).
• CE certificate in compliance with European Gas Directive 90/396/CEE and amendment
93/68/CEE.
• Microcontroller technology which guarantees timing precision for the complete
operating temperature range.
• Flame detection based on the flame’s rectifying effect (ionization principle).
• Multi-ignition-attempts.
Gas valve:
• Type-approved as per EN126.
• Safety class valve cut-offs B + C.
• Maximum rated pressure 50mbar.
• Operation at low safety voltage.
• Motor-operated opening and regulation.
• Version with and without outlet for pilot.
• Very small size.
Powermanagement
• On/Off.
• Two stage
• Modulating (input 0-10 Vdc)
• Manual (remote potentiometer)