Honeywell Gas solenoid valves VR4601QB2001U

The Honeywell VR4601QB2001U is a gas solenoid valve designed for safe regulation of gas flow in domestic heating systems, boilers, and water heaters. It has a nominal diameter of 23 mm, a maximum inlet pressure of 60 mbar, and a maximum operating pressure of 30 mbar. The valve provides a flow capacity of 4.2 m³/h at a pressure drop of 3 mbar, with an output aperture of 2.8 mm. It is suitable for use with Mora VI7690 (7690) boilers.

Parts of this type are selected by matching the nominal diameter, maximum inlet pressure, and flow capacity to the system requirements. Installation involves ensuring the valve's inlet and outlet connections align with the existing piping, and that the electrical connections match the system's voltage and control signals. The valve can be mounted in any orientation within 90 degrees from vertical, and it includes threaded mounting holes for secure attachment.

Common failure modes for gas valves of this kind include sticking or leaking due to debris or wear, leading to improper gas flow or failure to close. Symptoms may include the burner not igniting, fluctuating flame, or gas odor. Check for proper voltage at the valve terminals, inspect the inlet filter for blockage, and test for leaks around the valve body and connections.