Field Instruments

General

The differential pressure switches LGW…A2… are adjustable differential pressure switchesas per EN 1854 for automatic burner controls. Suitable for switching a circuit on, off or over on changes in actual pressure value relative to the set reference value. The reference value (switching point) is adjusted on a setting wheel provided with a scale. On LGW…A2P: test button integrated in lower part as standard.

Application

Differential pressure monitoring in firing, ventilation and air-conditioning systems. Suitable for air, flue and exhaust gases and other non-aggressive gases as differential pressure switches; not suitable for industrial combustion gases.

Specifications

• Make: DUNGS
• Part Number: LGW 50 A2
• Order Number: 272341
• Setting range (mbar):2.5-50
• Max. operating pressure: 500 mbar (50 kPa)
• Pressure connection: hose gland ø 4.6 mm
• Switching voltage:
  • • • Ag contact AC eff. min. 24 V max. 250 V
      • DC min. 24 V max. 48 V
      • Au contact DC min. 5 V max. 24 V
• Nominal current: AC eff. 10 A
• Electrical connection: Standard At screw terminals via M20x1.5 cable entry Special design Plug connection for line sockets as per DIN EN 175 301-803, 3-pin
• Degree of protection: IP 54 IEC 529 (EN 60529), protection insulated, optional IP 65
• Setting tolerance: ± 15 % switching point deviation, relative to nominal value, with vertical mounting position. Rising (↑) or falling (↓) setting available on site.
• Deviation: Permissible deviation of the set value ≤ ± 15 % in the service life test according to EN 1854

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