AADvance Safety Manual - Tuv-fs.com

Chapter 5 AADvance Functional Safety SystemImplementationIndustrial Functional Safety StandardsThe AADvance is designed to meet the following industrial safety system requirements:NFPA 85 RequirementsEN 50156NFPA 85 provides minimum requirements for the design, installation, operation andmaintenance of large commercial industrial boilers, heat recovery, heat recovery steamgenerators and related combustion systems. The AADvance system will be certified foruse with NFPA 85 compliant systems.The systems should be integrated in accordance with NFPA 85. In particular thefollowing shall be applied: The operator shall be provided with a dedicated manual switch that shallindependently and directly actuate the safety shutdown trip relay. At least oneidentified manual switch shall be located remotely from the boiler where it can bereached in case of emergency. The burner management system shall be provided with independent logic,independent input/output systems, and independent power supplies and shall be afunctionally and physically separate device from other logic systems, such as thecontrol system for the boiler or heat recovery steam generator. Logic sequences or devices intended to cause a safety shutdown, once initiated,shall cause a burner or master fuel trip, as applicable, and shall require operatoraction prior to resuming operation of the affected plant. No logic sequence ordevice shall be permitted that allows momentary closing and subsequentinadvertent reopening of the main or ignition fuel valves. Documentation shall be provided to the owner and operator, indicating that allsafety devices and logic meet the requirements of the application. System response time shall be sufficiently short to prevent negative effects on theapplication. The NFPA 85 certification is only applicable where the system is applied inaccordance with this safety manual and NFPA 85 requirements.EN 50156 applies to the application design and installation of electrical equipment,control circuits and protective systems for furnaces which are operated with solid,liquid or gaseous fuels and their ancillary equipment. It specifies requirements to meetoperating conditions for furnaces, to reduce the hazards of combustion and to protectthe heated systems from damage. The AADvance controller will be certified for use anEN 50156 compliant systems.In particular the AADvance controller will control protective devices for: monitoring of flames and other safety conditions of the firing interrupting the flow of the fuel to the furnace for safety reasons ventilating the body of the furnace and the flue gas ductsDocument number 553630 Issue 7: February 2010 5-7