INTRODUCTION

The ETC6100 Fuel:Air Ratio Control (FARC) incorporates PID modulation control and is for use with a separate Burner Control.  Options include Oxygen Trim, Variable Speed, and Communications. The ETC6100 is small and can be mounted on the burner or inside a control panel. CANbus simplifies wiring and is used for communication between the control, its actuators, display and peripherals.

The ETC6100 uses profiling information stored in memory to position the servo motors on the burner; these motors directly control fuel valves and air dampers and remove the need for mechanical linkages. 

A high-resolution control algorithm is used to eliminate hysteresis and to give repeatable control of valve and damper positions. Commissioned set point positions give predictable control over all points from low to high fire.  Interpolation methods give smooth and accurate transition between points.  Valve positions for ignition can be set below or above the low fire position providing for safe and reliable start-up and maximum turndown ratio.

The basic unit will control up to 10 CANbus servo motors supporting single or dual fuel burners for liquid or gaseous fuel firing. All servo channels can be non-monotonic making the control suitable for low NOx flue gas recirculation and firing of “exotic” fuels. Boiler modulation may be performed either manually, remotely using analogue or digital signals, or automatically from pressure or temperature sensors.

With such safety critical control applications design is to a high standard with

protection safeguards at every level. In line with this commitment to safety the ETC6100 meets the latest European Standards, Underwriters Laboratories and Factory Mutual requirements.

The multilingual full text display and its associated keypad provide valuable information to the end user and commissioning engineer; set-points, commissioned data, motor positions, time and date stamped limit and fault events and O2 trim and VSD data.

"ComView" communications software is an option available for all ETC controls.  This powerful package provides connection to a local or remote personal computer or terminal. Information such as set-points, profiles and engineer's data is displayed in tabular and graphic form.  Dynamic plant mimics show the status of boilers/burners and other ETC products.  Burner utilisation curves can be displayed as chart recorder images and alarms with time and date stamp are available. 

RS485 and Modbus and Profibus protocol converters are available to transmit data to Building Management Systems or, via modems or local intranet to remote workstations, PC’s or mobile telephones.