PROVENGAS is designed with safety in mind, and has been tested and certified by BG Technology to the latest standards and has approval. The system provides an easy, automated means of proving the integrity of any gas installation on a regular and routine basis. An integral time switch is provided so that timed automatic control of gas installations may be achieved. For security, the system is key switch operated and is provided with its own emergency shut off switch. Additional safety features such as remote emergency cut off switches, fire switches and thermal fuses can be included in any scheme. The ProvenGas safety system interlocks any mechanical ventilation with the gas supply so that the gas can only be used when all the fans are working. It also incorporates gas proving, ensuring that all equipment is off before allowing any gas to be used. The differential pressure switch can be connected to the panel to monitor fans. LED indicators on the panel show the status of the system. The ProvenGas safety system constantly monitors the incoming gas pressure and will isolate the gas supply to the workshop / lab when the pressure falls below 12mbar.
Air Pressure Switch
A 3 amp fused spur must be used to provide the 230V required to power the panel. A safety shut-off valve (approved to EN161) is powered by the panel from terminals marked ‘valve’.
The pressure transmitter mounts directly onto the safety shut-off valve (downstream test point) and is wired back to the panel by two core low voltage cable. It should be connected to the low voltage terminals marked ‘pressure switch’. Remote emergency shut-off buttons can be connected to the panel’s low voltage terminals marked ‘emergency stop’. For large installations, the fill and prove times can be doubled simply by one position change of the dip switch.
The differential pressure switch is connected to the terminal marked ‘fan switch’. There is a 45 second time delay on the interlock to help prevent nuisance tripping when using differential pressure switches