Kromschroder Tightness control unit TC116W05T 84765510

The Kromschroder TC116W05T (SKU 84765510) is a tightness control unit designed to verify the sealing of two safety valves before and after burner operation. It features an adjustable measurement time (5–30 s, factory set to 30 s) to accommodate different test volumes, leakage rates, and inlet pressures. The unit operates with natural gas, town gas, LPG (gaseous), biogas (max. 0.1% by vol. H2S), and air, with an inlet pressure range of 10–500 mbar. It has a valve opening time of 3 s, a protection class of IP65, and an impact-resistant plastic housing. The device is certified to SIL 3 according to EN 61508 and complies with relevant EU directives and standards.

Parts of this type are selected by matching the electrical ratings, gas type compatibility, and pressure range to the existing system. The unit must be installed with correct cable glands (M16 x 1.5) and cable cross-sections (0.75–2.5 mm²). Ensure the ambient and medium temperatures are within -20 to +60 °C, and storage temperature between -20 and +40 °C. The device is designed for installation at altitudes up to 2000 m above mean sea level. Verify that the control inputs and outputs are properly connected, and that the input current at terminal 1 does not exceed 5 A.

When tightness control units of this kind fail, they may not detect leaks in the safety valves, leading to unsafe burner operation. Symptoms include the burner failing to start or shutting down unexpectedly, or the unit not resetting properly. Check for correct wiring, proper gas pressure, and that the measurement time is set appropriately for the system. If the unit does not function, inspect the cable glands and connections for damage or moisture ingress.