文档介绍：INSTALLATION, OPERATION, MAINTENANCE IOM-F-825_826 Operation and Maintenance Manual Reduced Pressure Backflow Prevention Assemblies Models 825Y, 825YA, 825, 825D, 825YD & 826YD Read and understand this manual prior to installing, operating or servicing this equipment. TABLE OF CONTENTS Features and Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Freeze Protection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Vandalism Protection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 General Service Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Troubleshooting Procedures and Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 8 Field Testing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9, 10 Service Procedures Model 825Y ( 3 / 4–2") . . . . . . . . . . . . . . . . . . . . . . . 11, 12, 13 Parts Lists and Part Numbers Model 825Y ( 3 / 4–2") . . . . . . . . . . . . . . . . . . 14, 15 Exploded View of Model 825Y ( 3 / 4–2") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Service Procedures Models 825, 825D and 825YD (2 1 / 2–3") . . . . . . . . . . 16, 17 Service Procedures Models 825, 825D and 825YD (4–10") . . . . . . . . . . . 18, 19 Parts Lists and Part Numbers Model 825 (2 1 / 2–10”) . . . . . . . . . . . . . . . . . 20, 21 Exploded View of Model 825 (2 1 / 2–10") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Parts Lists and Part Numbers Models 825D and 825YD . . . . . . . . . . . . . . . . 22 Exploded View Models 825D and 825YD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Parts List and Exploded View of Model 825D and 825YD Check Assembly 24 Parts List