LGW 3A2 Technical description

The differential pressure switch LGW 3A2 is an adjustable differential pressure switch as 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.

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. Differential pressure switch for air, flue and exhaust gases

Approvals

EC type testing certificate as per:

• EC-Gas Appliances Regulation
• EC-Pressure Equipment Directive

Pressure switch class "S" as per EN 1854. Approvals in other important gasconsuming countries.

Functional description

Differential pressure switch in pressure and vacuum range. The differential pressure acts via the diaphragm against the force of the setting spring on the microswitch. The pressure switch operates without auxiliary power.

Differential pressure switch

The control unit responds to differential pressure. If the set reference value(mbar) is exceeded or undershot, the circuit is switched on, off or over.