HP Modular Cooling System G2 Maintenance and Service Guide Part Number 463066-003 February 2010 (Third Edition)
© Copyright 2008, 2010 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Intended audience This guide is for an experienced service technician.
Contents Customer self repair ...................................................................................................................... 5 Parts only warranty service ......................................................................................................................... 5 Illustrated parts catalog ............................................................................................................... 16 Replaceable spare parts ...........................................
Replacing the operator display ........................................................................................................ 51 Rear automatic door release ..................................................................................................................... 53 Removing the rear automatic door release ........................................................................................ 54 Replacing the rear automatic door release .................................................
Customer self repair HP products are designed with many Customer Self Repair (CSR) parts to minimize repair time and allow for greater flexibility in performing defective parts replacement. If during the diagnosis period HP (or HP service providers or service partners) identifies that the repair can be accomplished by the use of a CSR part, HP will ship that part directly to you for replacement. There are two categories of CSR parts: • Mandatory—Parts for which customer self repair is mandatory.
Obligatoire - Pièces pour lesquelles la réparation par le client est obligatoire. Si vous demandez à HP de remplacer ces pièces, les coûts de déplacement et main d'œuvre du service vous seront facturés. Facultatif - Pièces pour lesquelles la réparation par le client est facultative. Ces pièces sont également conçues pour permettre au client d'effectuer lui-même la réparation.
NOTA: alcuni componenti HP non sono progettati per la riparazione da parte del cliente. Per rispettare la garanzia, HP richiede che queste parti siano sostituite da un centro di assistenza autorizzato. Tali parti sono identificate da un "No" nel Catalogo illustrato dei componenti. In base alla disponibilità e alla località geografica, le parti CSR vengono spedite con consegna entro il giorno lavorativo seguente.
anrufen und sich von einem Mitarbeiter per Telefon helfen lassen. Den Materialien, die mit einem CSRErsatzteil geliefert werden, können Sie entnehmen, ob das defekte Teil an HP zurückgeschickt werden muss. Wenn es erforderlich ist, das defekte Teil an HP zurückzuschicken, müssen Sie dies innerhalb eines vorgegebenen Zeitraums tun, in der Regel innerhalb von fünf (5) Geschäftstagen.
Centro de asistencia técnica de HP y recibirá ayuda telefónica por parte de un técnico. Con el envío de materiales para la sustitución de componentes CSR, HP especificará si los componentes defectuosos deberán devolverse a HP. En aquellos casos en los que sea necesario devolver algún componente a HP, deberá hacerlo en el periodo de tiempo especificado, normalmente cinco días laborables. Los componentes defectuosos deberán devolverse con toda la documentación relacionada y con el embalaje de envío.
bijbehorende documentatie worden geretourneerd in het meegeleverde verpakkingsmateriaal. Als u het defecte onderdeel niet terugzendt, kan HP u voor het vervangende onderdeel kosten in rekening brengen. Bij reparatie door de klant betaalt HP alle verzendkosten voor het vervangende en geretourneerde onderdeel en kiest HP zelf welke koerier/transportonderneming hiervoor wordt gebruikt. Neem contact op met een Service Partner voor meer informatie over het Customer Self Repair programma van HP.
Serviço de garantia apenas para peças A garantia limitada da HP pode incluir um serviço de garantia apenas para peças. Segundo os termos do serviço de garantia apenas para peças, a HP fornece as peças de reposição sem cobrar nenhuma taxa. No caso desse serviço, a substituição de peças CSR é obrigatória. Se desejar que a HP substitua essas peças, serão cobradas as despesas de transporte e mão-de-obra do serviço.
Customer self repair 12
Customer self repair 13
Customer self repair 14
Customer self repair 15
Illustrated parts catalog Replaceable spare parts The replaceable spare parts for the HP Modular Cooling System G2 unit are listed in the following table.
Item Description Spare part number Customer self repair 5 SPS-CONTROL, WATER, GRP, MCS-G2 463359-001 Optional2 6 SPS-FAN, MAIN, MCS-G2 463362-001 Optional2 7 SPS-CONTROLLER, FAN, MCS-G2 468279-001 Optional2 8 SPS-AIR BLEEDER, MCS-G2 463367-001 Optional2 9 SPS-DISPLAY, OPERATOR, MCS-G2 463355-001 Optional2 10 SPS-MANAGEMENT MODULE, MCS-G2 463357-001 Optional2 11 SPS-TRANSFER SWITCH, AC, MCS-G2 463358-001 Optional2 12 SPS-WHOLE MCS UNIT, MCS-G2 463356-001 Optional2 ∗ SPS-K
No: Kein—Einige Teile sind nicht für Customer Self Repair ausgelegt. Um den Garantieanspruch des Kunden zu erfüllen, muss das Teil von einem HP Servicepartner ersetzt werden. Im illustrierten Teilekatalog sind diese Teile mit „No“ bzw. „Nein“ gekennzeichnet. 3 Mandatory: Obligatorio—componentes para los que la reparación por parte del usuario es obligatoria.
Illustrated parts catalog 19
Removal and replacement procedures Overview This document provides instructions for removing and replacing the HP Modular Cooling System G2 (MCS G2) spare parts. Follow the instructions to ensure proper replacement of spare parts. Spare replacement tips The following tips might ease the removal and replacement of spare parts: • Take note of the orientation and location of the parts as you remove them. It will help you properly replace the spare parts.
Component location The following figure provides an overall layout of the HP Modular Cooling System G2 unit components.
Callout Component 11 Air bleeder valve 12 Breaker panel 13 Operator display 14 Management module 15 AC transfer switch 16 Heat exchanger unit The following spare parts are not shown: • Automatic door release • Main hose kit • Electrical kit Required tools The following tools are required for each removal and replacement procedure: • AC transfer switch o • Air bleeder valve o • T-25 Torx driver Fan controller o • Adjustable wrench or Pliers Condensation pump o • T-25 Torx dri
• Water controller No tools are required for this procedure. • Water level sensors o • T-25 Torx driver Water valve o T-25 Torx driver o Razor blade o Pliers (included in the replacement kit) o 8-mm socket or wrench Safety considerations Before performing service procedures, review the following safety information. Rack warnings and cautions Before installing a spare kit, be sure that you understand the following warnings and cautions.
2. Disconnect the two AC power cables from the power connectors, labeled Primary and Secondary, on the power inlet box. Turning off the water 1. Turn off the water flowing into the MCS G2 unit, by closing the inlet (supply) and outlet (return) main water valves. 2. Confirm that no water is flowing into the MCS G2 unit. a. Open the valve in manual mode. b. Check the flow rate on the operator display or the web interface. Draining water from the MCS G2 unit 1.
3. Drain the water from the hoses into a bucket. AC transfer switch The AC transfer switch is located on the front panel of the MCS G2 unit. The following tools are required for installation: • T-25 Torx driver Removing the AC transfer switch 1. Disconnect the power ("Disconnecting the power" on page 23). 2. Disconnect all cables from the AC transfer switch.
3. Using a T-25 Torx driver, remove the four sheet metal screws that secure the AC transfer switch to the MCS G2 unit. Replacing the AC transfer switch 1. Align the AC transfer switch to the front of the MCS G2 unit. 2. Using a T-25 Torx driver, insert four sheet metal screws to secure the AC transfer switch to the MCS G2 unit.
3. Connect the cables to appropriate connectors on the AC transfer switch, according to the label on each cable. 4. Reconnect the power cables ("Reconnecting the power" on page 73). 5. Complete the operation checklist (on page 73). Air bleeder valve The air bleeder valve is located on the top rear of the MCS G2 unit. The following tools are required for installation: • Adjustable wrench or Pliers Removing the air bleeder valve 1. Remove the top fan unit ("Removing the fan unit" on page 36). 2.
4. Remove the air bleeder valve from the MCS G2 unit (2). Replacing the air bleeder valve 1. Align the air bleeder valve to the shut-off valve (1). 2. Using an adjustable wrench or pliers, tighten the air bleeder valve to the shut-off valve (2). 3. Open the orange bleeder ball valve at the top of the air bleeder valve, counter-clockwise approximately 3/4 turn, to allow air to flow (3). 4. Replace the top fan unit ("Replacing the fan unit" on page 37). 5.
No tools are required for this procedure. Removing the bottom fan unit 1. Remove the water controller ("Removing the water controller" on page 57). 2. Unlock the fan unit by rotating the handle on the unit counter-clockwise until the handle is vertical (1). 3. Pull the fan unit out of the MCS G2 unit (2). Replacing the bottom fan unit 1. Align the fan unit with the fan bracket. 2. Slide the fan unit into the MCS G2 unit until the fan connector meets the fan controller connection (1). 3.
4. Replace the water controller ("Replacing the water controller" on page 59). Condensation pump The condensation pump is a component of the water group located at the bottom of the MCS G2 unit. The following tools are required for installation: • T-25 Torx driver Removing the condensation pump 1. Disconnect the power ("Disconnecting the power" on page 23). 2. Remove the water controller ("Removing the water controller" on page 57). 3.
b. Using a T-25 Torx driver, remove the four T-25 Torx screws at each corner that secure the water group cover to the MCS G2 unit. 5. Disconnect the condensation pump cable from the water controller. 6. Disconnect the condensation outlet tube from the condensation pump. 7. Remove the condensation pump and attached inlet tube from the MCS G2 unit.
Replacing the condensation pump 1. Insert the inlet tube into the brass tube at the bottom of the water group. 2. Connect the condensation outlet tube to the condensation pump. 3. Align the condensation pump to the water group cover. 4. Replace the water group cover.
a. Using a T-25 Torx driver, insert and tighten the two flathead T-25 Torx screws into the condensation pump. b. Using a T-25 Torx driver, insert and tighten the four T-25 Torx screws into each corner of the water group cover. 5. Replace the bottom fan unit ("Replacing the bottom fan unit" on page 29). 6. Replace the water controller ("Replacing the water controller" on page 59). 7. Reconnect the power cables ("Reconnecting the power" on page 73). 8. Complete the operation checklist (on page 73).
Fan controller The three fan controllers are located between the fan units at the center rear of the MCS G2 unit. The following tools are required for installation: • T-25 Torx driver Removing the fan controller 1. Turn off the power ("Disconnecting the power" on page 23). 2. Unlock the two connecting fan units by rotating each handle on the unit counter-clockwise until the handle is vertical. 3. Remove the fan unit above the controller ("Removing the fan unit" on page 36). 4.
6. Disconnect the cables from the fan controller. 7. Slide the fan controller on its mounting bracket, and remove the fan controller from the MCS G2 unit. Replacing the fan controller 1. Align the fan controller with the mounting bracket. 2. Slide the fan controller into the MCS G2 unit. 3. Connect each cable to the appropriate location on the fan controller, according to the labels on the cables. 4. Lower the fan plate into position above the fan controller. 5.
7. Lock the two connecting fans in place by rotating each handle clockwise until the handle locks. 8. Reconnect the power cables ("Reconnecting the power" on page 73). 9. Complete the operation checklist (on page 73). Fan unit The six fan units are located at the center rear of the MCS G2 unit. The fan units are replaceable during real-time operation. No tools are required for this procedure. Removing the fan unit 1.
2. Pull the fan unit out of the MCS G2 unit (2). Replacing the fan unit 1. Align the fan unit with the fan bracket. 2. Slide the fan unit into the MCS G2 unit until the fan connector meets the fan controller connection (1). 3. Lock the fan in place by rotating the handle clockwise until the handle locks (2). 4. Complete the operation checklist (on page 73).
Flow meter sensor The flow meter sensor is a component of the water group located at the bottom of the MCS G2 unit. The following tools are required for installation: • T-25 Torx driver • Flathead screwdriver Removing the flow meter sensor 1. Disconnect the power ("Disconnecting the power" on page 23). 2. Turn off the water ("Turning off the water" on page 24). 3. Drain the main outlet water hose ("Draining water from the MCS G2 unit" on page 24). 4.
b. Using a T-25 Torx driver, remove the four T-25 Torx screws at each corner that secure the water group cover to the MCS G2 unit. 7. Remove the condensation pump ("Removing the condensation pump" on page 30). 8. Remove the plastic lock ring from the flow meter sensor.
9. Unscrew the plastic screw cap that secures the sensor to the flow meter. 10. Remove the sensor from the flow meter. 11. Disconnect the flow meter sensor cable from the water controller. 12. Remove the flow meter sensor cable from the cable wrap bundle, and remove the flow meter sensor and cable from the MCS G2 unit. Replacing the flow meter sensor 1. Align the notch of the flow meter sensor to the keyed notch of the flow meter.
2. Insert the keyed sensor into the top of the flow meter. 3. Tighten the plastic cap to secure the sensor to the flow meter.
4. Replace the plastic lock ring above the flow meter sensor. 5. Route the flow meter sensor cable through the cable wrap toward the rear of the MCS G2 unit. 6. Connect the flow meter sensor cable to the appropriate connector on the water controller. 7. Replace the condensation pump ("Replacing the condensation pump" on page 32). 8. Replace the water group cover.
a. Using a T-25 Torx driver, insert and tighten the two flathead T-25 Torx screws into the condensation pump. b. Using a T-25 Torx driver, insert and tighten the four T-25 Torx screws into each corner of the water group cover. 9. Replace the bottom fan unit ("Replacing the bottom fan unit" on page 29). 10. Replace the water controller ("Replacing the water controller" on page 59). 11. Reconnect the main outlet water hose ("Reconnecting the main water hoses" on page 73). 12.
Front automatic door release The front automatic door release is located on the front door of the rack attached to the MCS G2 unit. The following tools are required for installation: • Allen wrench (included in the replacement kit) Removing the front automatic door release 1. Unplug the electromagnetic lock cable from the panel connector on the MCS G2 unit.
2. Using an Allen wrench, included in your replacement kit, remove the two black cap screws that secure the electromagnetic lock to the electromagnetic lock bracket. 3. Remove the electromagnetic lock and cable from the rack. Replacing the front automatic door release 1. Align the electromagnetic lock to the electromagnetic lock bracket. 2.
3. Route the magnetic lock cable up the side of the rack, across the front of the rack, and plug the cable into the panel connector on the MCS G2 unit. 4. Complete the operation checklist (on page 73). Management module The management module is located on the front panel of the MCS G2 unit. No tools are required for this procedure. Removing the management module 1. Disconnect the power ("Disconnecting the power" on page 23). 2. Open the front door of the MCS G2 unit.
3. Disconnect the cables from the management module. 4. Slide the management module off the mounting bracket, and remove it from the MCS G2 unit.
Replacing the management module 1. Slide the management module onto the mounting bracket on the front panel of the MCS G2 unit. 2. Connect the cables to the appropriate connectors on the management module, according to the label on each cable. 3. Power up the management module.
4. Press and hold the C key to reset the management module. 5. Reconnect the power cables ("Reconnecting the power" on page 73). 6. Verify the user-defined settings through the web interface. 7. Complete the operation checklist (on page 73). Operator display The operator display is located on the front door of the MCS G2 unit. The following tools are required for installation: • 7-mm socket or wrench • Wire cutters Removing the operator display 1.
4. Using a 7-mm socket or wrench, remove the three locking nuts and external star washers that secure the rear cover to the inside of the front door of the MCS G2 unit. 5. Remove the rubber grommet securing the cables to the rear cover. 6. Remove the rear cover. 7. Disconnect the operator display cable from the management module.
8. Squeeze the four release tabs on the top and bottom of the operator display (1), and push the operator display through the front door (2). Replacing the operator display 1. Hold the four release tabs down (1) while pushing the operator display through the front door of the MCS G2 unit (2). The blue connector must be at the top of the display.
2. Connect the operator display cable to the appropriate connector on the management module. 3. Slide any extra cable into the operator display rear cover, and secure by inserting the rubber grommet into the notch on the rear cover. 4. Using a 7-mm socket or wrench, secure the rear cover to the door by inserting three locking nuts and external star washers. 5. Use cable ties to wrap all of the cables together. 6. Reconnect the power cables ("Reconnecting the power" on page 73). 7.
Rear automatic door release The rear automatic door release is located on the rear door of the rack attached to the MCS G2 unit.
Removing the rear automatic door release 1. Unplug the top and bottom electromagnetic lock cables from the extension lock cable. NOTE: Be sure to note the location of the electromagnetic brackets prior to removal.
2. Using a T-25 Torx driver, remove the four screws that secure the upper and lower electromagnetic lock brackets to the rack chassis. 3. Using an Allen wrench, included in the replacement kit, remove the two black cap screws that secure each electromagnetic lock to its electromagnetic lock bracket. 4. Remove the electromagnetic locks and cables from the rack. Replacing the rear automatic door release 1. Align the electromagnetic locks to the electromagnetic lock brackets.
2. Using an Allen wrench, included in the replacement kit, insert and tighten two black cap screws to secure each electromagnetic lock to its electromagnetic lock bracket. 3. Install the top electromagnetic lock bracket to the rack chassis in the location you noted during removal. a. Align the electromagnetic lock assembly to the rack chassis in the location you noted during removal. b. Using a T-25 Torx driver, insert and tighten two M5.
5. Route the magnetic lock cable through the rear extension channel, across the rack, and plug it into the panel connector on the MCS G2 unit. 6. Complete the operation checklist (on page 73). Water controller The water controller is located on the bottom rear of the MCS G2 unit. No tools are required for this procedure. Removing the water controller 1. Disconnect the power ("Disconnecting the power" on page 23).
2. Remove the two thumbscrews that secure the water controller to the mounting bracket and base. 3. Remove the water deflecting plate. 4. Disconnect all cables from the water controller.
5. Slide the water controller off the mounting bracket. 6. Remove the water controller base from the MCS G2 unit. Replacing the water controller 1. Slide the water controller onto the water controller mounting bracket.
2. Connect each cable to the appropriate connectors on the water controller, according to the label on each cable. 3. Replace the water controller base. 4. Replace the water deflecting plate. 5. Insert two thumbscrews to secure the water controller to the mounting bracket and base. 6. Reconnect the power cables ("Reconnecting the power" on page 73). 7. Complete the operation checklist (on page 73).
Water level sensors The water level sensors are a component of the water group located at the bottom of the MCS G2 unit. The following tools are required for installation: • T-25 Torx driver Removing the water level sensors 1. Disconnect the power ("Disconnecting the power" on page 23). 2. Remove the water controller ("Removing the water controller" on page 57). 3. Remove the bottom fan unit ("Removing the bottom fan unit" on page 29). 4. Remove the water group cover. a.
b. Using a T-25 Torx driver, remove the four T-25 Torx screws at each corner that secure the water group cover to the MCS G2 unit. 5. Remove the condensation pump ("Removing the condensation pump" on page 30). 6. Using a T-25 Torx driver, remove the two T-25 sheet metal screws securing the sensor bracket to the MCS G2 unit (1). 7. Remove the sensor bracket and attached water level sensors from the MCS G2 unit (2). 8. Remove the cable ties and unwrap the cable harness. 9.
3. Using a T-25 Torx driver, insert and tighten two T-25 sheet metal screws to secure the sensor bracket to the MCS G2 unit (2). 4. Replace the cable ties and cable harness to secure loose cables. 5. Replace the condensation pump ("Replacing the condensation pump" on page 32). 6. Replace the water group cover.
a. Using a T-25 Torx driver, insert and tighten the two flathead T-25 Torx screws into the condensation pump. b. Using a T-25 Torx driver, insert and tighten the four T-25 Torx screws into each corner of the water group cover. 7. Replace the bottom fan unit ("Replacing the bottom fan unit" on page 29). 8. Replace the water controller ("Replacing the water controller" on page 59). 9. Reconnect the power cables ("Reconnecting the power" on page 73). 10.
Water valve The water valve is a component of the water group located at the bottom of the MCS G2 unit. The following tools are required for installation: • T-25 Torx driver • Razor blade • Pliers (included in the replacement kit) • 8-mm socket or wrench Removing the water valve 1. Disconnect the power ("Disconnecting the power" on page 23). 2. Turn off the water ("Turning off the water" on page 24). 3.
a. Using a T-25 Torx driver, remove the two flathead T-25 Torx screws that secure the condensation pump. b. Using a T-25 Torx driver, remove the four T-25 Torx screws at each corner that secure the water group cover to the MCS G2 unit. 7. Remove the condensation pump ("Removing the condensation pump" on page 30). 8. Remove the sheet metal bulkhead.
a. Using a T-25 Torx driver, remove the two machine screws at the two bottom corners of the frame. b. Remove the two separate pieces of the frame from the MCS G2 unit.
c. Using a T-25 Torx driver, remove the four sheet metal screws at each corner of the frame. d. Remove the frame support from the MCS G2 unit. 9. Using a razor blade, remove the insulation around the valve. 10. Disconnect the water valve cable from the water controller. 11. Using an 8-mm socket or wrench, loosen the clamping brackets.
12. Using pliers, included in the replacement kit, loosen the two nuts on either side of the water valve. 13. Remove the water valve and two gaskets, one on either side of the water valve, from the MCS G2 unit. Replacing the water valve 1. Clean any remaining gasket debris from the two connecting flat-face coupling surfaces. 2. Align the water valve with the pipes in the MCS G2 unit. 3. Insert one gasket on either side of the valve, between the two nuts. 4.
8. Route the water valve cable through the back of the MCS G2 unit. 9. Connect the water valve cable to the appropriate connector on the water controller. 10. Wrap the insulation you previously removed around the water valve, and secure using either electrical tape or a cable tie wrap. 11. Replace the sheet metal bulkhead. a. Align the frame support to the appropriate holes in the MCS G2 unit. b. Insert the two pieces of the frame into the MCS G2 unit, aligning them with the frame support. i.
c. Using a T-25 Torx driver, insert and tighten four sheet metal screws, one in each corner of the frame, securing the frame to the MCS G2 unit. d. Using a T-25 Torx driver, insert and tighten two machine screws in the bottom two corners of the sheet metal frame. 12. Replace the condensation pump ("Replacing the condensation pump" on page 32).
13. Replace the water group cover. a. Using a T-25 Torx driver, insert and tighten the two flathead T-25 Torx screws into the condensation pump.
b. Using a T-25 Torx driver, insert and tighten the four T-25 Torx screws into each corner of the water group cover. 14. Replace the bottom fan unit ("Replacing the bottom fan unit" on page 29). 15. Replace the water controller ("Replacing the water controller" on page 59). 16. Reconnect the power cables ("Reconnecting the power" on page 73). 17. Complete the operation checklist (on page 73). Operation checklist 1.
a. Connect the primary power cable. b. Connect the secondary power cable. Restoring water flow If water was disconnected, restore water flow to the MCS unit at the facility-side valve.
Maintenance Maintenance and service For information on maintenance and service, refer to the HP website (http://www.hp.com). Air and water heat exchanger maintenance The air and water heat exchanger requires no maintenance. If particulates are present in the cooling water, a filter must be fitted immediately upstream from the water inlet fittings. Check the functionality of the condensation drainage system regularly. Regularly perform visual inspections for leaks (annually).
Parameter Range Specific conductance at 25ºC (77ºF) 10–2500 µmhos Alkalinity ("M" as CaCO3) 150–1000 ppm Sulfur (SO4) 0–150 ppm Chloride (Cl) 0–100 ppm Hardness (CaCO3) 0–350 ppm Calcium hardness (CaCO3) 0–200 ppm Magnesium hardness (CaCO3) 0–150 ppm Copper (Cu) < 0.20 ppm Iron (Fe) < 3.0 ppm Aluminum (Al) < 0.50 ppm Sodium (Na) 0–1000 ppm Silica (SiO2) 0–150 ppm Zinc (Zn) < 1.0 ppm Manganese (Mn) < 0.
• Ensure facility managers understand the additional load being added to the chilled water supply of the building. Be aware that the added heat load might affect other components being cooled by the chilled water plant.
Troubleshooting HP Modular Cooling System troubleshooting Issue Resolution The water flow is low or not flowing. For more information, see the "Temperature Control settings" section in the HP Modular Cooling System Web Interface User Guide located on the Documentation CD included with this product. The fan speed is too low.
Specifications MCS specifications Item Specification Voltage 208–240 VAC +/- 10%, 50–60 Hz Maximum Height (including the rack) 200 cm (78.7 in) Maximum Width (including the rack) 90.9 cm (35.8 in) maximum Maximum Depth (including the rack and rack handle) 127 cm (50 in) Maximum Shipping Height (on skid) 224.8 cm (88.5 in) Maximum Shipping Width (on skid) 122 cm (48 in) Maximum Shipping Depth (on skid) 177.8 cm (70 in) Maximum Depth with Rear Extension Kit installed 142.5 cm (56.
Thermal and air flow performance Maximum thermal and air flow performance parameters Single rack Dual rack Air temperature—inlet to rackmounted components 25ºC (68ºF) 25ºC (68ºF) Chilled water temperature 7º–15°C (45º–57°F) 7º–15°C (45º–57°F) Total rack-mounted component air flow 2,600 cfm or less at 0 or more pressure drop across the rackmounted components 1,300 cfm or less at 0 or more pressure drop across the rackmounted components Chilled water flow rate 15.5 gal/min (60 l/min) 7.
Acronyms and abbreviations CSR Customer Self Repair HEX heat exchanger HTTP hypertext transfer protocol MCS modular cooling system MCS G2 modular cooling system generation 2 Acronyms and abbreviations 81
Index A AC transfer switch 25 AC transfer switch, removing 25 AC transfer switch, replacing 26 air bleeder valve 27 air bleeder valve, removing 27 air bleeder valve, replacing 28 automatic door release 44, 53 C component location 21 component placement 21 components 21 condensation management 77 condensation pump 30 condensation pump, removing 30 condensation pump, replacing 32 CSR (customer self repair) 5 customer self repair (CSR) 5 D diagnostic tools 77, 78 disconnecting the power 23 draining the water
removing the operator display 49 removing the rear automatic door release 54 removing the water controller 57 removing the water level sensors 61 removing the water valve 65 replaceable spare parts 16 replacement video 20 replacing the AC transfer switch 26 replacing the air bleeder valve 28 replacing the bottom fan unit 29 replacing the condensation pump 32 replacing the fan controller 35 replacing the fan unit 29, 37 replacing the flow meter sensor 40 replacing the front automatic door release 45 replacin
