Rittal LCU CW Assembly And Operating Instructions Manual
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Rittal LCU CW Assembly And Operating Instructions Manual

Rittal LCU CW Assembly And Operating Instructions Manual

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Liquid cooling unit LCU CW
3313.610
Assembly and operating instructions

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Summary of Contents for Rittal LCU CW

  • Page 1 Liquid cooling unit LCU CW 3313.610 Assembly and operating instructions...
  • Page 2 Foreword Foreword Dear Customer, Thank you for choosing a Rittal Liquid Cooling Unit (also referred to hereafter as "LCU CW"). Please take the time to read this documentation carefully and pay particular attention to the safety instructions in the text and to section 2 "Safety instructions".

  • Page 3: Table Of Contents

    Inspection and maintenance ... 47 Assembly and siting ....... 13 Installation site requirements ....... 13 Storage and disposal ...... 48 Installing the LCU CW in a VX IT Technical specifications ....49 server rack ..........13 13.1 General technical specifications ....49 Positioning the pressure sensors....

  • Page 4: Notes On Documentation

    In conjunction with these assembly and operating in- structions, the superordinate system documentation (if available) also applies. Rittal GmbH & Co. KG is not responsible for any damage which may result from failure to comply with these as- sembly and operating instructions. The same applies to failure to comply with the valid documentation for acces- sories used.

  • Page 5: Safety Instructions

    The second person should hold the unit securely in an upright position until this has been done. The LCU CW produced by Rittal GmbH & Co. KG are – While inserting the unit into the server rack, there is a...

  • Page 6: Safety Instructions For Maintenance

    SVHC substance CAS No. may potentially be caused by the sharp edges inside 80-05-7 4,4'-isopropylidenediphenol the LCU CW, or if the module is dropped, or as a result of high air speeds and noise. Wear personal protective Lead 7439-92-1 equipment (PPE)!

  • Page 7: Product Description

    The air routing in the LCU CW supports the "front to back" cooling principle of the devices built into the server enclosure. The hot air expelled by the devices in the server enclosure is drawn in by the fans and thus routed through the heat exchanger module.

  • Page 8: Ambient Conditions

    By default, the fan is controlled according to the temperature difference. Ambient conditions The LCU CW is used to dissipate the thermal load gen- erated by IT equipment and prevent the installation site of the IT equipment from overheating. If IT systems are...
  • Page 9 10º Dew point curve 5º 0º -5º -10º -15º Mollier h-x diagram for humid air – pressure 0.950 bar (537.000 m / 10.000ºC / 80.000% rF) Fig. 3: Mollier h-x diagram for humid air Rittal Liquid Cooling Unit LCU CW...

  • Page 10: Air Routing

    Support for LCU CW Proper and improper usage Condensate discharge hose (3 m) The LCU CW is an air/water heat exchanger that cools Angular hose connector 90° closed spaces or housings in which IT components, such as servers, switches or similar, are installed and are Screw M5 x 12, self-tapping NZ/TX30 used in a technology room or data centre.

  • Page 11: Transportation And Handling

    Accessories   Because of its heavy weight, never lift the LCU CW by With two people holding the device by the handles, lift yourself (or even together with several people). Always it up. use appropriate lifting gear.
  • Page 12 With two people at the end faces, grasp hold of the device from beneath and remove it from the packag- ing.  Set the LCU CW down vertically on its underside and protect it from tipping over.  Check the unit for any damage that may have oc- curred during transport.

  • Page 13: Assembly And Siting

    5 Assembly and siting Assembly and siting Before the internal unit of the LCU CW can be installed in a VX IT server rack, the following work should be car- ried out: Installation site requirements  Slide the 482.6 mm (19") mounting angles away from The LCU CW is an air/water heat exchanger for IT equip- you by 50 mm.
  • Page 14 Fig. 12: Top punched section with mounting flange Caution!  Secure the rail for mounting the LCU CW right at the There is a risk that the LCU CW might tip front of the bottom punched section with mounting over.

  • Page 15: Positioning The Pressure Sensors

    5 Assembly and siting Fig. 14: Securing the LCU CW to the front at the top Fastening screws Note: Take care to ensure that air routing in the air intake and outlet zone of the LCU CW is not obstructed by other installed components.

  • Page 16: Installation

    No additional control equipment may be  Gently push the lock plate downwards and then pull it connected upstream of the device at the off backwards. supply end. The LCU CW is electrically connected using the type C14 connector. Rittal Liquid Cooling Unit LCU CW...

  • Page 17: Cooling Water Connection

    Cooling water connection dergo multiple load changes per minute. This hysteresis The LCU CW is connected to the cold water network via is transferred directly to the cold water system, leading two G¾" threaded pipe connections (external thread) on to a fluctuating ΔT.
  • Page 18 Hydraulic balancing secondary circuit pump allows the entire volume of wa- For an efficient cold water supply to the LCU CW, the ter required for cooling in the secondary circuit to circu- cold water system must be hydraulically balanced. If the late, and is responsible for mixing the temperatures.
  • Page 19 To avoid the loss of fluids due to diffusion for closed systems, it is recommended to deploy automatic filling with conditioned additive wa- ter. Note: The 2-way control valve used in the device is opened at zero current. Rittal Liquid Cooling Unit LCU CW...

  • Page 20: Configuration

    Changing the network settings General As a general rule, during the course of commissioning, Basic configuration of the LCU CW, particularly the (one- the network settings of the climate controller will only off) adjustment of the network settings, may be carried...

  • Page 21: Changing The Measurement Units

    7.2.4 LCU CW configuration "Manual" for automatic IP allocation. The basic settings for the LCU CW are defined in the  Click on the Save button to change your settings. Cooling System group frame. To do this, call the ap-...
  • Page 22 Fan control according to pressure difference The air pressure difference in front of and behind the LCU CW in the server rack is measured by one (or a maximum of two) differential pressure sensor(s) (delta P control) and used as the reference. The differential pres- sure sensors are not included with the supply and must be ordered separately and fitted (see section 5.3 "Posi-...
  • Page 23 Once the calibration pro- cess is complete, the status will automati- cally revert to "Activated". When switching from "Inactive" to "Calibra- tion" the operating hours meter is reset. Tab. 5: Settings in the Air Parameter Configuration dialogue Rittal Liquid Cooling Unit LCU CW...
  • Page 24 PID control algorithm. The set here. setting is made in seconds. Tab. 6: Settings in the Coolant Parameter Configuration dia- Tab. 6: Settings in the Coolant Parameter Configuration dia- logue logue Rittal Liquid Cooling Unit LCU CW...

  • Page 25: Settings

    Colors selected here: White, pink, blue, green, or off. Tab. 7: Settings in the General Parameter Configuration dia- logue 7.2.5 Settings All other setting options for the LCU CW are described in section 8 "Operation". Rittal Liquid Cooling Unit LCU CW...

  • Page 26: Operation

    Control and display Explanation Display component The display on the front of the LCU CW offers the follow- SET button Use this button to confirm warn- ing functions: ings and alarms. – Display of the average server intake air temperature...

  • Page 27: General Information About Programming

    1 second. "Fahrenheit" unit After that, the next menu up will appear. "Down" arrow key More extensive settings can be made with the Rittal "Up" arrow key Scan & Service app via the NFC interface (see sec- Home key tion 8.2.4 "Rittal Scan &...

  • Page 28: Manually Acknowledge A System Message

    The setpoint speed for the fans and the 8.3.1 General control valve setting are sent to the connected control units via the climate controller. The climate controller of the LCU CW carries out the fol- lowing functions: 8.3.2 Acknowledging messages – Scan all measurements (temperatures, pressures, Generally speaking, there are three different ways of ac- speeds, flowrate, current rating etc.).

  • Page 29: Extended Options By Connecting The Lcu Cw To A Network

    (fig. 29, item 6) to a free jack on the network Fig. 31: Layout of screen pages access using a suitable network cable. The LCU CW is preset in the factory to the IP address General information 192.168.0.190 (see section 7.2 "HTTP connection"). Navigation area...

  • Page 30: Index Tabs In The Configuration Area

    Index tabs in the configuration area Seven index tabs are displayed in the right-hand section of the screen: 1. Monitoring: Current data of the LCU CW or connect- ed devices (see section 8.6 "Monitoring index tab"). Fig. 32: Layout of message display 2.

  • Page 31: Other Displays

    "Device" entries by clicking on the "plus" symbol in front of the entry (fig. 35, item 1). – A red "prohibited symbol" (fig. 33, item 3) appears af- ter the incorrect entry (fig. 33, item 2) the Netmask Rittal Liquid Cooling Unit LCU CW...

  • Page 32: Logging Off And Changing The Password

    "Write Values" dialogue For every user group (and hence for every user), it is pos-  Here, enter the location of the LCU CW. sible to set a time after which the user is automatically  Confirm your entry by clicking on the Write button.

  • Page 33: Reorganising The Connected Components

    8.6.1 Device a lack of allocation between the position of the compo- General settings for the LCU CW are carried out at "De- nents in the CAN bus and the corresponding ID number. vice" level. The "Reorganize" function renumbers all connected...

  • Page 34: Fans

    Currently selected operating mode. formed at this level. The settings, as well as the dis- Mode played parameters, correspond to those in the " "IT Sup- ply" level. Tab. 16: Settings at the "Internal Control" sub-level Rittal Liquid Cooling Unit LCU CW...

  • Page 35: Coolant

    Tab. 20: Displays at the "Coolant Flow" level The following parameters are also displayed for the wa- ter inlet temperature: Parameter Explanation Value Current water inlet temperature. Tab. 18: Display at the "Coolant Supply" level Rittal Liquid Cooling Unit LCU CW...

  • Page 36: Valve

    (the value is determined over the du- ration of 1 to 2 minutes). Tab. 26: Displays at the "Cooling Capacity" level Rittal Liquid Cooling Unit LCU CW...

  • Page 37: Leakage Sensor

    Externally prescribed setpoint for the serv- er inlet temperature. Flow meter Accumulated cooling water flow in litres. Tab. 32: Displays at the "Remote" sub-level > "Remote Tempera- Tab. 30: Displays at the "Operating Data" sub-level ture" Rittal Liquid Cooling Unit LCU CW...
  • Page 38 Tab. 34: Displays at the "Remote" sub-level > "Remote Fans" A CMC III temperature/humidity sensor (7030.111) is built into the LCU CW and connected to determine the "Remote" sub-level > "Remote Valve" current dew point.
  • Page 39 Target cooling medium circuit. IT Supply Minimum server inlet temperature. Low Tem- perature IT Supply Maximum server inlet temperature. High Tem- perature Tab. 39: Settings at the "Features" sub-level > "Coolant Delta T- mode" Rittal Liquid Cooling Unit LCU CW...

  • Page 40: Configuration Index Tab

    • Coolant Configuration • General Configuration Flowrate Current cooling medium flowrate. The configuration options for the LCU CW in the group IT Supply Current server inlet temperature. frame Cooling System are described in detail in sec- Temperature tions 7.2.3 "Changing the measurement units" and 7.2.4 "LCU CW configuration".
  • Page 41 False"). If the server inlet temperature then drops back to within the preset limits after exceeding the upper limit, the fans are always switched to automatic mode by the task, regardless of the previously selected fan operating mode (e.g. "Manual", "Off" or "Full"). Rittal Liquid Cooling Unit LCU CW...

  • Page 42: Updates And Data Backup

    Monitoring and Configuration tabs are stored in the "cmcIIIsave.cfg" file. For a second LCU CW of the same type, this configura- tion file can be placed for transfer similarly in the upload directory. This LCU CW is then configured automatically similarly as the LCU CW for which this file was saved.

  • Page 43: Troubleshooting

    Pump incorrectly dimen- Flow rate too low. Dimension the pump larger. sioned. Hydraulic balancing not es- Water flow rate in LCU too Establish hydraulic balanc- tablished. low. ing with balancing valves or similar. Rittal Liquid Cooling Unit LCU CW...
  • Page 44 Older systems with existing Upon integration in existing contaminants cold water networks, the use of a water/water heat ex- changer is recommended. This forms a second water circuit. Rittal Liquid Cooling Unit LCU CW...

  • Page 45: System Messages

    Your cooling unit fans are running more slowly than the set threshold val- Your cooling unit fan has a cable breakage or is not installed. You can order the required spare part from Rittal or, alternatively, con- tact the Rittal service team.
  • Page 46 Differential pressure sensor Differential pressure sensor defective or not available. Emergency condensate mode ac- Your LCU CW is operating in condensate emergency mode due to con- tive densate warning. Please correct the error and / or contact the Rittal Service team.

  • Page 47: Inspection And Maintenance

    The LCU CW is largely maintenance-free. An additional external strainer with fine-mesh sieve is required if the cooling water is contaminated. This should be cleaned regularly.

  • Page 48: Storage And Disposal

    Caution! Risk of damage! The air/water heat exchanger must not be subjected to temperatures above +70 °C during storage. Disposal can be performed at the Rittal plant. Please contact us for advice. Emptying: During storage and transportation below freezing point, the air/water heat exchanger should be drained com- pletely.

  • Page 49: Technical Specifications

    Inlet water temperature [°C] Outlet water temperature [°C] Water flow [l/min] Coil pressure drop Total water pressure drop Volumetric airflow 1600 1600 1600 1600 LCU supply air temperature [°C] LCU return air temperature [°C] Airside ΔT Rittal Liquid Cooling Unit LCU CW...
  • Page 50 1260 1260 1260 1260 1260 1260 1260 LCU supply air temperature [°C] LCU return air temperature [°C] Airside ΔT Cooling Output (Sensible) [kW] Inlet water temperature [°C] Outlet water temperature [°C] Water flow [l/min] Rittal Liquid Cooling Unit LCU CW...

  • Page 51: Water Side Pressure Loss

    Volumetric airflow LCU supply air temperature [°C] LCU return air temperature [°C] Airside ΔT 13.3 Water side pressure loss Water pressure loss Water flow rate in l/min Fig. 41: Characteristic curve water pressure loss Rittal Liquid Cooling Unit LCU CW...

  • Page 52: P&Id Scheme

    Fan 4-6 Temperature sensor air top Fan 7-9 Temperature sensor air middle Flow sensor Temperature sensor air bottom Check valve Temperature sensor water out Ball valve Temperature sensor water in Temperature sensor air top Rittal Liquid Cooling Unit LCU CW...

  • Page 53: Circuit Diagram

    13 Technical specifications 13.5 Circuit diagram Rittal Liquid Cooling Unit LCU CW...
  • Page 54 13 Technical specifications Rittal Liquid Cooling Unit LCU CW...
  • Page 55 13 Technical specifications Rittal Liquid Cooling Unit LCU CW...
  • Page 56 13 Technical specifications Rittal Liquid Cooling Unit LCU CW...
  • Page 57 13 Technical specifications Rittal Liquid Cooling Unit LCU CW...
  • Page 58 + # 6 ;C  + # # 6 ;C  + # 2 6 ;C  + # I C  6 ;C  I C  6 ;C  I C  6 ;C  Rittal Liquid Cooling Unit LCU CW...
  • Page 59 13 Technical specifications I C  6 ;C  I C  6 ;C  I C  O& 6 ;C  Rittal Liquid Cooling Unit LCU CW...
  • Page 60 13 Technical specifications I C  6 ;C  I C # 6 ;C # I C 2 O& 6 ;C 2 Rittal Liquid Cooling Unit LCU CW...
  • Page 61 13 Technical specifications I C  2 " 6 ;C  I C  6 ;C  I C " 2 " O& 6 ;C " Rittal Liquid Cooling Unit LCU CW...
  • Page 62 13 Technical specifications Rittal Liquid Cooling Unit LCU CW...

  • Page 63: Information Concerning The Filling And Additive Water

    Recommended cooling medium – Low-salinity water (demineralised water) based on VDI 2035. Up to a maximum of 50 volume percent Antifro- gen-N may be added (see table 42). Other additives may be used only in agreement with Rittal. Low-salinity Saline Electrical conductiv- <...

  • Page 64: Spare Parts

    15 Spare parts Spare parts Spare parts may be ordered directly from the Rittal web- site: – http://rittal.com/spare_parts Climate Controller Power pack CMC III temperature/humidity sensor Display Fan module Check valve Ball valve 100 Flow sensor 150 Temperature sensor 160 Temperature sensor water in...

  • Page 65: Accessories

    2.5 m long, may be shortened, with 90° bend on one side and clamping tray screw connection on the other side Brush strip kit 3313612 For partitioning the LCU CW in a VX IT network/server rack Connection cable 7200210 Earthing-pin / C 13 socket...

  • Page 66: Glossary

    Because of this, it is normally advisable to locate recooling sys- tems outside of buildings. Recooling systems and air/water heat exchangers form a complete cooling solution. Rittal Liquid Cooling Unit LCU CW...
  • Page 67 Notes Rittal Liquid Cooling Unit LCU CW...
  • Page 68 ◾ Climate Control ◾ IT Infrastructure ◾ Software & Services You can find the contact details of all Rittal companies throughout the world here. www.rittal.com/contact RITTAL GmbH & Co. KG Auf dem Stuetzelberg · 35745 Herborn · Germany Phone +49 2772 505-0...

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3313.610

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