Honeywell Gas pressure switches for flanged C60VR40110

The Honeywell C60VR40110 is a flanged gas pressure switch designed for direct mounting on Honeywell VQ400 double valves and VRB00/VR400/V4730 combination gas valves. It monitors minimum gas pressure in the safe start interlock circuit with an adjustable set point. The switch operates with a gauge pressure type, relative, and has a maximum working pressure of 2 bar. It features a 1x SPDT switching function, an aluminum body, a PBT reinforced with fiberglass cover, and a DIN plug electrical connection. The ambient temperature range is -10 to 70 °C, and it is certified to CE (EN 1854).

Parts of this type are selected by the medium (gas), the switching range and differential, the connection type (in this case flanged), and the contact rating required by the control circuit. They are typically installed downstream of the gas filter and upstream of the gas valve train, often on a dedicated tapping on the pipework. When replacing a switch of this type, ensure the setpoint and differential match the original specification for the burner. The flanged design indicates a direct bolted connection rather than a threaded or hose spigot, simplifying alignment on larger pipework.

Common failure modes include a torn diaphragm, a blocked impulse tube, or a drifted setpoint; these manifest as repeated lockouts that may be mistaken for ignition faults. The equipment may fail to start or lock out during operation if the pressure falls outside the set limits. Check the diaphragm, impulse tube, and setpoint calibration when such symptoms occur.