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Service Area/Item Description <br />BASIC <br />ADDITIONAL SYSTEM <br />WDC <br />SYSTEM <br />SERVICES <br />Combiner, Enclosure <br />Inspect enclosure and devices for corrosion, <br />moisture entry, insect and rodent infestation, and <br />exterior damage. Confirm that all signage and <br />labeling are in place. <br />6.1 <br />Annually <br />DC Combiner, SPD <br />Inspect Surge Protection Devices for indication of <br />Replacement of SPDs <br />6.2 <br />failure. If any single SPD indicates failure mode, <br />Annually <br />replace all SPD modules. <br />DC Combiner, IR <br />6.3 <br />Perform thermographic survey of all terminations <br />Annually <br />and over current protection devices. <br />Open Circuit Voltage Testing of All <br />Connected Strings Verify balance of expected <br />voltage inputs of all strings in combiner box or <br />string inverter wiring. When safe to do so, Proof <br />of Life testing via amperage clamp will be <br />conducted <br />6.4 <br />in replacement of Voc string testing. <br />Annually <br />7 <br />DC Raceway <br />DCRaceway <br />71 <br />Inspect all DC raceways for loose connections, <br />Annually <br />missing sealant, corrosion and above -grade <br />intrusions. <br />8 <br />PV Output Connector <br />PV Output Connector, Insulation <br />81 <br />Inspect exposed insulation jacket for physical <br />Annually <br />damage and evidence of overheating. <br />PV Output Connector, Compression <br />Connector <br />8.2 <br />Inspect compression -applied connectors for <br />Annually <br />correct cable match and indentation. <br />PV Output Conductor, IR <br />Perform thermographic survey of all terminations <br />8.3 <br />and overcurrent protective devices not covered <br />Annually <br />elsewhere in scope. <br />9 <br />DC Disconnect <br />DCDisconnect, Enclosure <br />Confidential & Proprietary Information of Ameresco, Inc. Page 51 of 56 <br />