Kromschroder Gas pressure switch DG 45VC1-6W /B 75455244

The Kromschroder DG 45VC1-6W /B (SKU 75455244) is a gas pressure switch designed to monitor positive gas pressure within a range of 10 to 45 mbar. It is manufactured in Germany and features a hand wheel for manual setpoint adjustment. This component is used in gas burner and boiler safety systems to ensure gas pressure remains within acceptable limits, providing a signal to the burner control when pressure deviates from the set range.

When selecting a replacement pressure switch of this type, verify the medium (gas or air), the required switching range and differential, the connection type (thread or hose spigot), and the electrical contact rating. Ensure the setpoint can be adjusted to match the system's requirements, and confirm the approval class matches the original part. Installation typically involves connecting the impulse line to the pressure tap and wiring the electrical contacts according to the burner control sequence.

Common failures of gas pressure switches include a torn diaphragm, a blocked impulse tube, or a drifted setpoint. These issues can cause the burner to lockout, often mimicking an ignition fault. Check the diaphragm for damage, ensure the impulse tube is clear, and verify the setpoint against a manometer to diagnose the problem.