Location: Mechanical Floor - Chilled Water Pump No.1

1. Removal of Existing Faulty VFD (1 No.)

• Safely isolate electrical supply to the existing Variable Frequency Drive (VFD).
• Disconnect all power and control wiring from the faulty unit.
• Carefully remove the existing VFD from the panel/mounting arrangement.
• Hand over the removed VFD as per client instructions.

2. Supply & Installation of New 30 kW VFD (ABB ACH580) – 1 No.

• Supply new 30 kW ABB ACH580 HVAC series VFD with appropriate ratings and specifications.
• Inspect mounting space and prepare the panel for installation.
• Install the VFD securely on the existing or modified mounting arrangement.
• Ensure proper ventilation, spacing, and safety clearances.

3. Control & Power Wiring Modification for New VFD (1 No.)

• Review existing wiring layout and update as per new VFD requirements.
• Modify control wiring (I/O terminals, communication, interlocks, feedback signals, etc.).
• Upgrade or alter power wiring including:
• Supply input cables
• Motor output connections
• Earthing conductor connections
• Ensure all wiring meets electrical standards and ABB installation guidelines.

4. Programming & Configuration of VFD as per Site Logic (1 No.)

• Program the ABB ACH580 VFD according to site-specific functional logic.
• Configure parameters such as:
• Motor data
• Start/stop logic
• Speed reference
• Protection limits
• Communication settings
• Conduct verification of interlocks and safety features.

5. Testing & Commissioning

• Perform pre-commissioning checks (insulation, continuity, power supply).
• Energize the VFD and perform functional testing with motor.
• Verify:
• Correct rotation
• Speed control
• Load response
• Trip conditions and safety functions
• Conduct performance trials under actual operating conditions.
• Handover commissioning report to the Building Management.