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Renovation of cooling turbines in electronic racks of Atlas

Renovation of cooling turbines in electronic racks of Atlas. W. Iwanski . Inventory . Metal long turbines (USA15, US15): 167 pcs (+10 spares) Plastic long turbines (HS UX15): 40 pcs (+4 spares) Plastic short turbines (HO/BW UX15): 41 pcs (+4 spares). Work to do on each turbine.

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Renovation of cooling turbines in electronic racks of Atlas

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  1. Renovation of cooling turbines in electronic racks of Atlas W. Iwanski

  2. Inventory • Metal long turbines (USA15, US15): • 167 pcs (+10 spares) • Plastic long turbines (HS UX15): • 40 pcs (+4 spares) • Plastic short turbines (HO/BW UX15): • 41 pcs (+4 spares)

  3. Work to do on each turbine • Move a turbine up from a counting room to the hangar • Disassembly the chassis • Unscrew fans (left/right), disconnect internal wiring • Replace and fix new fans (left/right), connect internal wiring • Assembly the chassis • Power up the turbine and keep it running until next day; measure the current consumption • Update the work log, put new labels • Move renovated turbine down to a counting room and install in a rack

  4. Technical team • When working on UX15 turbines (heavy shielded turbines, difficult access) • In/out, up/down: 4 (strong) persons • Hangar: 2 persons • Overall supervision and coordination: 1 person • When working on USA15, US15 turbines • In/out, up/down: 2 (strong) persons • Hangar: 2 persons • Overall supervision and coordination: 1 person

  5. Access constraints • Turbines blocked from front • USA15: L1 trigger (several) -> turbines adopted to be moved out from back of a rack • UX15: BWA and BWC (1 + 1) -> demounting of front panel in place required • BWA and BWC (time-wise constraints) • 10/16 to be done when BW is in open position • 3/16 to be done when BW is in closed position • 3/16 to be done anytime • BWA and BWC (place-wise constraints) • 7/16 to be accessed from Nacel/fork lift • 9/16 to be accessed from blue of BW structure

  6. Progress projection • UX15 (41 plastic short): HOA, HOC, BWA, BWC • 6 turbines/day  8 days • UX15 (40 plastic long): HS US, HS USA • 6 turbines/day  8 days • US15, USA15 (167 metal long): • 6 turbines/day  28 days --------------------------------------------------------- = 9 weeks  ~ 2.5 months

  7. Rack downtime projection • UX15 • BWA and BWC  few days for each wheel • HOA and HOC  1 day for each HO • HS US and HS USA  1 day for each floor • USA15 and US15 • 1 h per rack

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