RFT Waitaki and Manapouri Air Compressor Routine and Unscheduled Maintenance

⁠⁠⁠This contract covers the scheduled maintenance and fault response requires for the 39 compressors Meridian operate across our seven Hydro Power Stations. 30 of these units are manufactured by Atlas Copco and the remaining 9 are other manufacturers. Details of individual compressor makes and models can be found in addendum 3.

Each Hydro Station has two compressed air systems comprising of station air (7 Bar Ohau A/B/C, 13 Bar others) used for TWD (Turbine Wheel depression), shear pin air and pneumatic tooling. A second high pressure system (operation pressure 40 bar) is used to supply governor air for (HP governor) and to charge hydraulic accumulators for turbine wicket gate actuation. The compressed air used in these systems is critical for safe operation of the generation units. Therefore system reliability and quick fault response are key requirements of this service.

The service agreement will be for a term of five years and consist of two main constituents:

1 - A fixed preventative maintenance schedule including parts as recommended in the operator's handbook. This portion of the services includes:

• Total care package on Atlas Copco and other compressors as listed in addendum 3;
• Comprehensive diagnosis on performance and fault code interpretation on Atlas Copco and other compressors as listed in addendum 3;
• Guaranteed parts availability; and
• System improvement recommendations as required as well as additional services by assignment:
• Air Leak and vacuum detection surveys and rectification quotations; and
• Air quality testing.

2 - An unscheduled maintenance support package required for swift fault response and rectification including 24/7 callout support. This requires on-call coverage of mechanical fitters, electricians and refrigeration technicians to cover all potential fault rectification requirements.