Lenovo Neptune DWC RM100 Operation & Maintenance Manual
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Lenovo Neptune DWC RM100 Operation & Maintenance Manual

In-rack coolant distribution unit
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Lenovo Neptune DWC RM100
in-rack Coolant Distribution Unit
(CDU)
OPERATION & MAINTENANCE GUIDE

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Summary of Contents for Lenovo Neptune DWC RM100

  • Page 1 Lenovo Neptune DWC RM100 in-rack Coolant Distribution Unit (CDU) OPERATION & MAINTENANCE GUIDE...
  • Page 2 Neptune DWC RM100 in-rack Coolant Distribution Unit INFORMATION ABOUT THIS GUIDE Using the document This document has been produced for double-sided printing and viewing as a PDF file (subject to copyright). Further, or up to date copies of this guide can be obtained from the address on the front page of this document.

  • Page 3: Table Of Contents

    Neptune DWC RM100 in-rack Coolant Distribution Unit Contents Safety Information ......................... 5 Safety Notices ........................... 5 Safety Instructions ........................5 1. Product Description ........................7 1.1 General ..........................7 1.2 Product Views ........................8 2. Operation ..........................10 2.1 Controller Overview ......................10 2.2 User Interface ........................
  • Page 4 Neptune DWC RM100 in-rack Coolant Distribution Unit 3.3.7 Fluid checks ........................37 3.3.8 Functional checks ......................37 3.4 Secondary Filter Service ..................... 38 3.5 Spare Parts ........................38 4. Additional Information ....................... 40 4.1 Wiring Diagram (WD00003-01) .................... 40 4.2 Pipe Schematic (SC00002-01) ..................... 47 4.3 Warranty &...

  • Page 5: Safety Information

    This product must not be used in a hazardous environment. Warranty Failure to comply with the Lenovo Limited’s installation, maintenance and operation instructions may affect the reliability and performance of the unit and invalidate any warranty. CDU Operating & Maintenance Guide...
  • Page 6 Any parts replaced during maintenance or servicing must be the same specification as those being replaced and should only be obtained from Lenovo service. The use of incorrect replacement parts may affect the operation or reliability of the unit and invalidate any warranty.

  • Page 7: Product Description

    Neptune DWC RM100 in-rack Coolant Distribution Unit 1. Product Description 1.1 General This document describes the basic characteristics & operation of the RM100 Coolant Distribution Unit (CDU) and the required ongoing maintenance considerations. The CDU contains a Secondary closed loop circuit that provides a supply of cooling water to IT equipment, either through indirect cooling (e.g.

  • Page 8: Product Views

    Neptune DWC RM100 in-rack Coolant Distribution Unit 1.2 Product Views Primary Circuit Control Valve Pump 48v DC Power Supply Secondary Circuit Pumps 24v DC Power Supply Fluid make-up connection Plate Heat Exchanger Fill Pump Temperature Sensors Removable Fascia Control Board Panel Controller 7”...

  • Page 9: Fig.2 - Rear View Of Rm100 (With Hose Connection Detail)

    Neptune DWC RM100 in-rack Coolant Distribution Unit Expansion Vessel Cooling Fans Pressure Sensors Pressure Relief Valve set at 3.5 Bar/50 psi (not shown) Secondary Flow Meter Reservoir Tank with 50µ Secondary Filter Level Sensor Reservoir/Secondary Circuit Drain Reservoir/Secondary Circuit Vent...

  • Page 10: Operation

    Neptune DWC RM100 in-rack Coolant Distribution Unit 2. Operation 2.1 Controller Overview The RM100 controller is designed to monitor and control the supply of cooling water to IT equipment in unattended data centre environments. Secondary circuit cooling water is closely controlled to a defined temperature and at a controlled differential pressure (or flow rate), for optimum management of heat rejection.

  • Page 11: Status Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit Only visible when logged-in at Service or Engineer level Only visible when logged-in Return to Home screen Fig.4 – Control System main Menu screen 2.2.3 STATUS Screen The Status screen displays comprehensive viewable only information on the operating condition of the RM100 unit.

  • Page 12: Data Curves Screen (Real Time Update)

    Neptune DWC RM100 in-rack Coolant Distribution Unit Status – Page 2 Primary Supply Temperature T1 _ _ °C Primary Return Temperature T5 _ _ °C Primary Flow Rate _ _ l/m Ambient Temperature _ _ °C Ambient RH _ _ % Dew Point _ _ °C...

  • Page 13: Log-In Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit Fig.7 – Control System Alarms screen 2.2.6 LOG-IN Screen The Log-in screen allows the user access to further information and to adjust various parameters and settings when logged-in at Service or Engineer level.

  • Page 14: Setup Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit NOTICE! The following menu screens will only be visible once Logged-in 2.2.7 SETUP Screen The Setup screen will not normally need to be accessed. Items within this screen will either be set at the factory, or during commissioning.
  • Page 15 Neptune DWC RM100 in-rack Coolant Distribution Unit Setup - IP Connectivity Title Description Default Range Unit P040 Interface #1 Enabled Set to active or not Enabled Enable - Disable (see below for sub-menu details) P041 Interface #2 Enabled Set to active or not...

  • Page 16: Configuration Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit 2.2.8 CONFIGURATION Screen The Configuration screen can be used to set specific parameters and control functions. NOTICE! Parameter ID’s shown in ‘red’ text will only be accessible with the Engineer log-in code. Fig.10 – Control System Configuration screen...
  • Page 17 Neptune DWC RM100 in-rack Coolant Distribution Unit Configuration – Temperature Control Title Description Default Range Unit P301 Temperature Setpoint Set required Secondary temperature setpoint 18.0 10.0 to °C 55.0 P302 Control Mode Select from Fixed Setpoint or Fixed Setpoint FSDO...

  • Page 18: Service Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit Configuration – Sensors (continued) Title Description Default Range Unit P704 PS2 Scaling Set measurement range. 0 = 0 to 30bar, 1 = 0 0 to 2 to 15bar, 2 = -1 to 8 bar.
  • Page 19 Neptune DWC RM100 in-rack Coolant Distribution Unit Service - Fill Pump Request This fill function is used at commissioning only and will allow the fill pump to run without any time limit. Fill pump will still switch Off automatically when unit reaches...

  • Page 20: Diagnostics Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit 2.2.10 DIAGNOSTICS Screen This screen will give raw information and conversion factors for the status for all Universal Inputs, Resistive Inputs, Digital Inputs, Digital Outputs, and Analogue Outputs. Fig.12 – Control System Diagnostics screen I/O Diagnostics –...

  • Page 21: Calibration Screen

    Neptune DWC RM100 in-rack Coolant Distribution Unit 2.2.11 CALIBRATION Screen The touchscreen will enter calibration mode if the screen is pressed 20 times within a 4 second interval. To complete calibration follow the on screen instruction`s. Fig.13 – Control System Calibration screen 2.3 Automatic Operation...

  • Page 22: Fig.16 - Fill Pump Manual Activation

    Neptune DWC RM100 in-rack Coolant Distribution Unit - The operator will need to press the ‘Fill Required’ icon, which will then display the message shown in Fig.16 to ensure that the filling hose (with container of fluid) or the flexible make-up container is connected before the fill pump is activated by pressing the ON button.

  • Page 23: Fig.17 - Fill Pressure & Level Flow Chart (At Initial Start)

    Neptune DWC RM100 in-rack Coolant Distribution Unit RM100 initial Unit off-line, commissioned, start-up with make-up fill bag connected Start enabled = fill pump ‘switch on’ threshold (RM100 on-line) pressure (default 0.8 Bar (12psi)) = fill pump ‘switch off’ hysteresis pressure (default 0.2 Bar (3psi) Fill pressure (PS1) ≥...

  • Page 24: Fig.18 - Fill Pressure & Level Flow Chart (When Running)

    Neptune DWC RM100 in-rack Coolant Distribution Unit RM100 water pressure Unit running, with make-up management fill bag connected = fill pump ‘switch on’ threshold – Secondary pressure (default 0.8 Bar (12psi)) Over Pressure = fill pump ‘switch off’ hysteresis System pressure (default 0.2 Bar (3psi))

  • Page 25: Fig.19 - Water Level Management Flow Chart (When Running)

    Neptune DWC RM100 in-rack Coolant Distribution Unit RM100 water level Unit running, with make-up management fill bag connected Water level sensor open circuit >1 sec? – Level Sensor – No Water Is Flow/DP >50% of SP RM100 continues to run A16–...
  • Page 26 Neptune DWC RM100 in-rack Coolant Distribution Unit The secondary fluid temperature is monitored at the reservoir tank. Three temperature sensors are positioned here to give extended component redundancy (T2a, T2b & T2c). The controller will take an average between all 3 readings as its input value.

  • Page 27: Primary Circuit Operation

    Neptune DWC RM100 in-rack Coolant Distribution Unit 2.3.2 Primary Circuit Operation The primary water temperature (T1) is monitored at the inlet to the RM100 cabinet. The nominal cooling performance of the CDU has been calculated on a chilled water temperature between 4 and 10°C (40 and 50°F).

  • Page 28: Temperature Control Loop Adjustment

    Neptune DWC RM100 in-rack Coolant Distribution Unit 2.4 Temperature Control Loop Adjustment In most applications, the default PID settings in the controller with give good temperature control. If it is found necessary to change these, then it is recommended that the Zeigler-Nichols manual tuning method is adopted.
  • Page 29 Neptune DWC RM100 in-rack Coolant Distribution Unit 22/12/2017 11:34 A flashing alarm bell icon gives alarm indication Fig.20 – Control Screen Alarm indication Pressing the alarm bell icon will bring up the alarm page (as shown below) which will identify which alarms are active.

  • Page 30: Trouble Shooting (Alarms)

    Neptune DWC RM100 in-rack Coolant Distribution Unit The self-clearing and latching alarms are identified in Section 2.6 All alarms are automatically logged in an Alarm Log file stored on the controller microSD card, with the time & date of generation.
  • Page 31 Neptune DWC RM100 in-rack Coolant Distribution Unit Code Description Sev. Self-clear Latching Shutdown Delay ✓ T4 Secondary Temperature Sensor Fault Reading from Secondary return temperature sensor T4 is outside the normal range of 5 to 74°C (41 to Detail: 165°F) or disconnected.
  • Page 32 Neptune DWC RM100 in-rack Coolant Distribution Unit Code Description Sev. Self-clear Latching Shutdown Delay ✓ ✓ Leak Shutdown / Insufficient Water On Initial Start-up – if level sensor is not made, fill pressure has not been achieved & fill pump has been running for more than 1 minute, then unit will not start or shutdown immediately.
  • Page 33 Neptune DWC RM100 in-rack Coolant Distribution Unit Code Description Sev. Self-clear Latching Shutdown Delay ✓ ✓ Secondary Water High Temperature Secondary water temperature has risen by more than 2°C (4°F) above set point (default). Alarm will cancel when temperature falls to 1°C (2°F) above set point or lower. If Dew Point Offset is active, then Detail: this alarm will activate at a pre-set default value of 20°C (70°F) –...
  • Page 34 Neptune DWC RM100 in-rack Coolant Distribution Unit Code Description Sev. Self-clear Latching Shutdown Delay ✓ Primary Water No Flow Will only activate when Valve Demand is at 100%, A32 - Secondary Water High Temp and A30 - Primary Detail: High Temp alarms are active (default 5 minute delay applies).

  • Page 35: Temperature Sensor Graph

    Neptune DWC RM100 in-rack Coolant Distribution Unit Code Description Sev. Self-clear Latching Shutdown Delay ✓ Pump 1 Low Flow Pump 1 has not reached the differential pressure (or flow rate) setpoint and is running at 100% in the Detail: specified time limit (default 30 secs). Pump 1 will then stop and Pump 2 will run.

  • Page 36: Maintenance

    Neptune DWC RM100 in-rack Coolant Distribution Unit 3. Maintenance 3.1 General The CDU should be cleaned on a regular basis and checked for leaks and malfunctions. Maintenance should only be carried out by personnel qualified to work on this type of equipment.

  • Page 37: Controller Checks

    Neptune DWC RM100 in-rack Coolant Distribution Unit 3.3.4 Controller checks (setpoints and alarm actions, group control etc. – download logs) Check the sync date and time of the units - Check for any current alarms, take appropriate action as detailed in this guide - Download complete contents of RM100 folder from micro-SD card.

  • Page 38: Secondary Filter Service

    Neptune DWC RM100 in-rack Coolant Distribution Unit 3.4 Secondary Filter Service Secondary Circuit Vent Point Remove retaining screws & withdraw filter from side of unit for cleaning Secondary Circuit Drain Point Fig.24 – Servicing Secondary Filter NOTICE! The unit will need to be stopped before cleaning the filter and either partially of fully withdrawn from the rack The Secondary filter may be removed &...
  • Page 39 Neptune DWC RM100 in-rack Coolant Distribution Unit Part No. Description SP00010-01 Temperature Sensor SP00012-01 Flow Meter Sensor SP00013-01 Pressure Sensor (-1 to 8 bar) SP00014-nn Power Supply 48V SP00014-nn Power Supply 24v SP00016-03 Level Sensor Optical SP00020-02 Make-up Container SP00023-03 Secondary 50µ...

  • Page 40: Additional Information

    Neptune DWC RM100 in-rack Coolant Distribution Unit 4. Additional Information 4.1 Wiring Diagram (WD00003-01) CDU Operating & Maintenance Guide Page...
  • Page 41 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...
  • Page 42 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...
  • Page 43 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...
  • Page 44 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...
  • Page 45 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...
  • Page 46 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...

  • Page 47: Pipe Schematic (Sc00002-01)

    Neptune DWC RM100 in-rack Coolant Distribution Unit 4.2 Pipe Schematic (SC00002-01) CDU Operating & Maintenance Guide Page...
  • Page 48 Neptune DWC RM100 in-rack Coolant Distribution Unit CDU Operating & Maintenance Guide Page...

  • Page 49: Warranty & Contact Details

    Neptune DWC RM100 in-rack Coolant Distribution Unit 4.3 Warranty & Contact Details Technical and Service Support: To obtain the above, please contact the manufacturer directly: Tel: +44 (0) 1732 867105 +86 139-1779-7039 Email: info@cooltera.com Limited Product and Service Warranty Cooltera Coolant Distribution Units (CDU’s.) 2 Years parts only.
  • Page 50 Neptune DWC RM100 in-rack Coolant Distribution Unit Notes: CDU Operating & Maintenance Guide Page...
  • Page 51 Neptune DWC RM100 in-rack Coolant Distribution Unit Disposal Information NOTE: Waste materials must be disposed of in a responsible manner in line with environmental regulations. The de-commissioning and disposal of this product should be undertaken by qualified personnel in adherence to local and national safety regulations, particularly for protection of lungs, eyes and skin from chemicals, dust etc.

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