Honeywell Gas control block VR4601CB1024B

The Honeywell VR4601CB1024B is a gas control block designed for use in Ferroli Seven boilers (models 119-136-153-170-187-221-255-289 LN 2S). It features a flanged connection, a maximum inlet pressure of 60 mbar, and a flow capacity of 4.2 m³/h at a pressure drop of 3 mbar. The valve supports DSI, HSI, and IP ignition systems, and has a back pressure of 50 mbar on the first valve. It is CE certified and has a coil connection on top, with an output aperture of 2.8 mm.

Parts of this type are selected by matching the connection type (flanged), inlet pressure rating, flow capacity, and ignition system compatibility. Ensure the valve's coil connection orientation and output aperture size align with the boiler's requirements. Before ordering, verify the gas type and pressure specifications against the system's needs.

Common failures include the valve failing to open or close properly, leading to no gas flow or gas leakage. Symptoms may include the burner not igniting, intermittent operation, or pressure fluctuations. Check for electrical continuity in the coil, proper voltage supply, and debris blocking the inlet screen.