FSSS
FURNACE SAFEGUARD SUPERVISORY SYSTEM, WHICH SYSTEM IS SOLD AS A UNIT AND COMPRISES A COMMAND INITIATIVE UNIT; DECISION MAKING LOGIC; DRIVEN DEVICES-NAMELY IGNITER TRANSFORMERS, FUEL VALVE DRIVES, AIR DAMPER DRIVES, FUEL GUN EXTEND-RETRACT DRIVES, PULVERIZER CIRCUIT BREAKERS; AND PRIMARY SENSING ELEMENTS-NAMELY, FLAME SCANNERS, LIMIT SWITCHES, PRESSURE SENSORS, FLOW DETECTORS, LEVEL SENSORS, LOSS-OF-ELECTRIC POWER SENSORS
Expired · November 20, 1974 · 73037588 ·