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Using the LifeCycleCost:RecurringCost object, set the Category field to Maintenance. The ExampleFiles\5ZoneEconomicsTariffAndLifeCycleCosts.idf file (usually in the C:\EnergyPlusV8-6-0\ExampleFiles directory) has an example:

  LifeCycleCost:RecurringCosts,
    AnnualMaint,             !- Name
    Maintenance,             !- Category
    7000,                    !- Cost
    ServicePeriod,           !- Start of Costs
    0,                       !- Years from Start
    0,                       !- Months from Start
    1,                       !- Repeat Period Years
    0,                       !- Repeat Period Months
    0;                       !- Annual escalation rate

The present value is reported in the tabular output file in the Life-Cycle Cost Report.