Kromschroder Gas pressure switch DG150U-3 84447500

The Kromschroder DG150U-3 is a gas pressure switch with SKU 84447500, designed to regulate positive, negative, or differential air and flue gas pressures. It has an adjusting range of 0.4 to 6 mbar and switches with rising pressure. The switch features IP65 ingress protection, weighs 283 g, and has a designed lifetime of 10 years. It complies with EN 13611:2015+AC:2016 and EN 1854:2010 standards, and holds approval CE-0085AP0466. This component is an essential safety component in the safety chain, with production surveillance per directives.

Parts of this type are selected by matching the pressure range and switching function (rising or falling pressure) to the system requirements. Installation involves connecting electrical wires via screw terminals and a cable gland, ensuring proper sealing to maintain IP65 protection. The switch must be mounted in the correct orientation and position to sense the intended pressure. Before ordering, verify the pressure range, electrical ratings, and approval markings against the original part.

When items of this kind fail, they may fail to switch at the set point, causing the burner to shut down or fail to start. Symptoms include the equipment not igniting, frequent lockouts, or erratic operation. Check the pressure switch for diaphragm damage, leakage, or electrical contact issues, and verify the set point with a manometer.