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THE FOLLOWING POINTS ARE IMPORTANT FOR GOOk <br />MAINTENANCE OF CONTROLS AND THOSE RESPONSIBLE FOR <br />PROPER FUNCTIONING OF THIS EQUIPMENT SHOULD BE AWARE <br />OF THESE BASIC PRACTICES. <br />1. Do everything possible for safety. <br />2. A systematic program of inspection and maintenance work should be used. <br />3. Initial installation should be tested and proved satisfactory before it is accepted. <br />4. An adequate supply of correct renewal/replacement parts should be available, <br />5. Enclosures should be chosen for the operating conditions. <br />6. Keep controllers clean and dry, <br />7. Replace contacts that are worn very thin or badly burned and pitted. Replace all <br />contacts and associate parts on switch at same time. <br />8. Do not change contact shape by rough filing or grinding. <br />9. Keep all connections tight. <br />10. Do not oil contactor or relay bearings but keep these units clean and free <br />moving. <br />11. Operate coils at rated voltage. Both over -voltage and under -voltage conditions <br />are undesirable. <br />12. Keep arc -rupturing parts in good condition and in correct operating positions. <br />13. Correct conditions that cause excessive temperatures. <br />14. Be alert for undesirable grounds on all circuits and eliminate them. <br />