The HVAC–DDC System Assessment Technical Representative is responsible for performing a comprehensive evaluation of the facility's HVAC and Direct Digital Control (DDC) systems, which are currently in operational failure and causing moisture-related building damage. The representative will conduct on-site diagnostics, testing, calibration, and provide corrective reprogramming of the Trane Tracer SC+ system. The role includes performing a full system assessment, documenting findings, and preparing a detailed corrective action report.
Documentation Review
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Review as-built mechanical and control drawings, Sequence of Operations (SOO), historical maintenance logs, repair records, and trend data.
On-Site Technical Assessment
Perform full evaluation of: DDC ControllersNetwork
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Verify communication/power status and diagnose software alarmsprogramming faults.
SensorsDevices
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Calibrate all critical sensors (temperature, humidity, and pressure).
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Test actuators, valves, VAVs, and VFDs through full range of motion.
Mechanical HVAC Equipment
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Inspect AHUs, DOAS units, pumps, chillers, and other major components.
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Validate mechanical response to DDC commands.
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Check refrigerant levels, safety controls, pump seals, and clean strainers.
Functional Performance Testing
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Conduct system performance verification, including occupied/unoccupied modes, economizer operations, and heating/cooling changeover.
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Confirm ability to maintain temperature/humidity setpoints under load.
Corrective Action Deliverables
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Provide root-cause analysis of system failures.
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Deliver prioritized recommendations for repairs, replacements, upgrades, and programming changes.
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Provide defective component list and a combined mechanical/DDC maintenance checklist.
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Provide updated or proposed Sequence of Operations (SOO).
Tools, MaterialsLogistics
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Provide list of required tools/materials; arrange shipment when not available on-island.
SafetyCompliance
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Follow all KBR, federal, NSF Diego Garcia, and BIOT regulations.
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Wear PPE provided and maintain proper identification.
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Minimum 7 years documented experience in commercial HVAC and DDC diagnostics, service, and commissioning.
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Formal certification in Trane Tracer SC+ Operations and Service.
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Proficiency with BACnet (MS/TP and IP) and Modbus network protocols.
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Strong knowledge of mechanical systems including chillers, VAVs, VFDs, air distribution, and psychometrics
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Valid driver's license (eligible for onisland license).
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Work performed on Diego Garcia military installation.
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Regular hours: 0700–1700, Monday–Saturday.
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Period of performance: 6 days including travel.
- Base life support (lodging, meals, etc.) provided by KBR and backcharged.
