INSTRUCT IONS FOR THE INSTALLATION, OPERATION, AND MAINTENANCE oF ALTERNATING-CURRENT MACHINERY These instructions are intended to cover the major points in the installation, operation, and maintenance of alternating-current machinery. Wherever there are special conditions or variations in equipment, additional information or assistance may be secured upon request from the Engineering Department. 1. KEEP THE MACHINE CLEAR of all rags, boxes, and accumulation that might hamper ventilation. Any rubbish spread about a machine represents a fire hazard and breeding place for rodents: which are a constant menace to all electrical equipment. KEEP THE MACHINE CLEAN, Successful operation of a machine depends wholly upon the maintenance and service given it. A heavy layer of dirt, sand, or any foreign material allowed to accumulate on a machine can cause excessive overheating of the windings, If the winding is not cleanedperiodically, dirt and grit will become imbedded in the coils and the danger of a serious injury increases at an accelerating rate. Dirt lodged in the windings can cause short circuits and result in expensive shutdowns for costly repairs, therefore, it is easy to realize how important and necessary a thorough cleaning at regular intervals by suction or mild blowing will save much time and expense. KEEP THE MACHINE SERVICED. It is best to completely disassemble and overhaul a machine once a year unless adverse conditions 3-27