VRF Branch Controller Addressing and Commissioning Inspection

Commissioning inspection for VRF branch controller boxes to verify indoor unit addressing, refrigerant line identification, network communication, and safe startup checks.

Inspection Record Details

• Project / site name recorded
  Record the project, building, or site name for this commissioning inspection.
• Inspection date and time recorded
  Capture the date and time the commissioning inspection was performed.
• Inspector name and company recorded
  Enter the name of the inspector and the company performing the commissioning.
• System model / equipment schedule reference recorded
  Record the VRF system model, branch controller model, or equipment schedule reference used for verification.
• Reference documents available on site
  Confirm that the approved submittals, wiring diagrams, addressing schedule, and commissioning checklist are available for reference.

Branch Controller Identification and Installation

• Branch controller box label matches installed location
  Verify the branch controller box identification label matches the physical location and approved drawings.
• Refrigerant line IDs match designations on drawings
  Confirm refrigerant line identification tags correspond to the approved piping schedule and branch controller connections.
• Branch controller mounted securely and accessible for service
  Verify the cabinet is securely mounted, level, and accessible for maintenance without obstruction.
• Clearance around branch controller is adequate
  Confirm required service clearance is maintained and access panels can be opened fully.
• Piping connections visibly free of damage or leakage
  Inspect the branch controller refrigerant connections for visible damage, oil staining, or signs of leakage.

Indoor Unit Addressing Verification

• Indoor unit address list matches installed units
  Verify each indoor unit is present on the addressing schedule and corresponds to the installed equipment.
• Unique address assigned to each indoor unit
  Confirm no duplicate indoor unit addresses exist on the VRF network.
• Indoor unit address entered correctly at controller
  Verify the address programmed at the branch controller or indoor unit matches the commissioning schedule.
• Addressing method documented
  Record how the indoor units were addressed during commissioning.
• Any addressing conflicts resolved
  Confirm all addressing conflicts, duplicates, or mismatches were corrected before startup.

Communication and Control Verification

• Central controller recognizes all addressed indoor units
  Verify the central controller displays each indoor unit and branch controller without missing devices.
• Communication status is normal for all branch controller circuits
  Confirm communication indicators show normal status and no fault codes are present for the branch controller network.
• Network resistance / continuity verified within acceptable range
  Record the measured network resistance or continuity check result for the communication circuit.
• Central controller time, schedule, and setpoint communication verified
  Confirm the central controller can read and write operating commands to the connected indoor units.
• Faults or communication alarms present
  Indicate whether any communication, addressing, or controller faults remain active at completion.

Pre-Energization and Safety Checks

• Lockout-tagout applied where required before work
  Confirm lockout-tagout controls were used in accordance with OSHA 1910.147 before accessing energized components.
• Electrical covers and access panels secured before energizing
  Verify all electrical covers, terminal guards, and access panels are installed and secured prior to startup.
• Refrigerant safety and leak concerns identified
  Confirm there are no visible refrigerant safety concerns, abnormal odors, or suspected leaks requiring escalation.
• Work area clear and safe for commissioning startup
  Verify the area is free of trip hazards, tools, loose materials, and unauthorized personnel before startup.

Final Commissioning Result and Sign-Off

• Commissioning status
  Select the final result of the branch controller addressing and commissioning inspection.
• Outstanding deficiencies documented
  List any unresolved deficiencies, non-conformances, or follow-up actions required before final acceptance.
• Inspector signature
  Inspector sign-off confirming the commissioning record is complete and accurate.