9 COMBUSTION CONTROLS, NAMELY PROGRAMMER MODULES, AMPLIFIER MODULES, DISPLAY MODULES, COMMUNICATION MODULES, PORTABLE SERVICE MODULES USED TO EXTRACT SERVICE INFORMATION STORED IN THE MEMORY OF THE FLAME SAFEGUARD CONTROL UNIT, AND ACCESSORY EQUIPMENT, NAMELY, CABLE INTERCONNECTION WIRING UNITS AND MOUNTING HOUSINGS FOR USE WITH THE FLAME SAFEGUARD CONTROL