Asetek InRackCDU Owner's manual

CA92344-3632-01
Installation, Operation & Maintenance Guide
InRackCDU (4U-V2)
Oct. 2019

Asetek InRackCDU Installation, Operation & Maintenance Guide
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Table of Contents
1. Product Introduction............................................................................................................................ 2
1.1 CDU Cabinet................................................................................................................................. 3
1.2 Coolant Distribution Manifold (CDM).......................................................................................... 4
1.3 Facilities Hoses ............................................................................................................................ 4
1.4 Server to CDM Tube Sets............................................................................................................. 5
1.5 Coolant ........................................................................................................................................ 5
2Important Information ......................................................................................................................... 6
3Tools & Materials Required.................................................................................................................. 8
4Unpacking the InRackCDU System ....................................................................................................... 8
5Installation............................................................................................................................................ 9
5.1 Mounting the CDU Cabinet ......................................................................................................... 9
5.2 Installing the Facility Hoses to the CDU Cabinet ......................................................................... 9
5.3 Mounting the CDMs to the Rack ............................................................................................... 10
5.4 Connecting CDU Cabinet to CDM .............................................................................................. 11
5.5 Mount Ventilation Tube for Reservoir ......................................................................................11
5.6 Connect Power and Networking to Monitoring System ........................................................... 12
5.7 Install 3rd Party External Leak Sensors (Optional(out of support by FUJITSU)) ......................... 12
5.8 Configure Monitoring System on Network ............................................................................... 14
6System Startup ................................................................................................................................... 15
6.1 Preparation of floor for InRackCDU with for facility tubes connection in the bottom ............. 15
6.2 Connecting the InRackCDU System to Facilities Water.............................................................15
6.3 Connect Server Tube Sets to CDM ............................................................................................ 17
6.4 Powering Up Servers ................................................................................................................. 17
7Routine Maintenance.........................................................................................................................18
7.1 Check Reservoir Level and Refill As Necessary.......................................................................... 18
7.2 Replacing Power Supplies..........................................................................................................19
8Other Abnormalities and Failures ...................................................................................................... 20
Appendix I –Spill Response ........................................................................................................................ 20
Appendix II - CDU Specifications................................................................................................................. 21
Appendix III –Facility Water Requirements ...............................................................................................22
Appendix IV –Installation of InRackCDU in PCR-M2 rack........................................................................... 24
Appendix V –Installation of Transportation Lock in PCR-M2 rack ............................................................. 26
Appendix VI –Thermal performance data.................................................................................................. 27

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1. Product Introduction
Asetek InRackCDU is a data center, warm water, direct-to-chip (D2C), liquid cooling system that is
deployable at a rack level. The InRackCDU system consists of six major components:
1. CDU Cabinet containing liquid-to-liquid heat exchanger and coolant reservoir
2. CDU to CDM hoses
3. Coolant Distribution Manifolds (CDM)
4. Power supply for monitoring system
5. Facility hose pair (not shown)
6. Rail kit (not shown)
The first three components of the InRackCDU system are delivered pre-filled with server cooling liquid.
There is no need for data center staff to handle server cooling liquid when installing the InRackCDU or
when removing and replacing servers during maintenance. Tubes connect between the CDM and server
coolers with locking dripless quick connectors. These connectors seal immediately when disconnected
keeping the server coolant in the tube, CDM and server cooler.

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1.1 CDU Cabinet
The CDU Cabinet mounts in the top 4U of a standard 19” rack. Mounting it inside of the rack makes it ideal
for data centers that are limited in floor space. The CDU Cabinet contains a liquid-to-liquid heat exchanger,
removable server coolant reservoir and removable power supplies. The CDU rejects (transfers) heat
generated by the connected servers into facilities liquid. The CDU is a passive device and relies on the
server and facilities pumps to circulate liquid. The CDU keeps facilities liquid and server cooling liquid
completely separate (i.e. no mixing of facilities and server liquid). Only heat is transferred between the
two liquids in the CDU.
The CDU Cabinet can also be configured with dew point control to ensure that the supply water
temperature is above dew point to prevent condensation from forming.
Connection to CDMs
Facility Connections
Ventilation Line
Liquid Reservoir (in Front)
Drain Line
PSU-B
PSU-A

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The CDU Cabinet also comes with a monitoring system that monitors the following.
Facility liquid temperature –Supply & Return
Server liquid temperature –Supply & Return
Facility liquid pressure
Facility liquid flow rate
Server liquid pressure
Coolant reservoir level
Heat load
Leak detection (inside cabinet)
Dew point control (optional)
The monitoring system is capable of sending out email alerts and alarms at user-defined thresholds and
communicates to with DCiM (Data Center Infrastructure Management) or DCM (Data Center
Management) systems via SNMP.
1.2 Coolant Distribution Manifold (CDM)
The CDMs mount like zero-U PDUs in the space at the hot aisle end of the rack. CDMs are delivered in
pairs, one supply (cold, with blue quick connectors) and one return (hot, with red quick connectors). CDMs
deliver cool coolant from the CDU cabinet to the server liquid coolers and return heated coolant from the
server coolers to the CDU cabinet.
1.3 Facilities Hoses
Facilities hoses connect the CDU cabinet to the facilities water system. This system may be located under
a raised floor or above the rack, typically above the hot aisle. Connection to the facilities liquid system is
made via Camlock fittings. Camlock fittings are a globally-available, tool-less connection system where the
dimensions of the matting ends are governed by international standards, allowing a male Camlock
purchase on one continent to mate seamlessly with a female Camlock purchased on another continent.

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1.4 Server to CDM Tube Sets
The CDMs are connected to the server liquid coolers via pairs of connecting tubes. One tube is used to
deliver cooled (supply) liquid to the server. The other returns heated (return) liquid from the servers to
the heat exchangers for heat rejection into facilities liquid.
1.5 Coolant
The server coolant in InRackCDU systems is a mixture of DI water, propylene glycol with some additional
additives for corrosion resistance. It is a safe, environmentally friendly liquid. It provides freeze protection
and inhibits corrosion and biological growth within the system. The coolant is not a “Hazardous Chemical”
as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200. A Material Safety Data Sheet
(MSDS) for the coolant is included in the packaging.

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2 Important Information
Any failure to observe the guidelines in this manual, and any improper repairs could expose the
user to risks (electric shock, energy hazards and fire hazards) or damage the equipment.
If the CDU Cabinet enclosure has been moved from a cold environment, into a warm data center
condensation may form both inside and on the outside of the machine.
Wait until the CDU Cabinet has acclimatized to room temperature and is absolutely dry before
starting it up. Material damage may be caused to the monitoring system if this requirement is
not met.
Only transport the InRackCDU and CDMs in the original packaging or in packaging that protects
it from impacts and jolts.
The monitoring unit in the CDU Cabinet requires a supply voltage of 100 –240 V 50/60 Hz. There
are two redundant, hot-swappable power supplies.
This device must only be connected to properly grounded power outlets or insulated sockets of
the rack's internal power supply with tested and approved power cords.
Never connect or disconnect data transmission lines during a storm (risk of lightning hazard).
Make sure that no objects (e.g. jewelry, paperclips etc.) or liquids can get inside the CDU cabinet
(risk of electric shock, short circuit).
In emergencies (e.g. damaged casing, controls or cables, penetration of liquids or foreign
bodies), switch off the server enclosure immediately, remove all power plugs and contact your
sales outlet or customer service team.
In the unlikely event of a spill or leak of coolant from the server liquid loop follow the suggested
spill response procedure listed in Appendix I.
The circuit boards and soldered parts of internal options are exposed and can be damaged by
static electricity. Before handling them, first touch a metal part of the CDU cabinet to discharge
static electricity from your body.
Do not touch the circuitry on boards or soldered parts. Hold the edges of the circuit boards.
For CDU Cabinet installation use a server lift.

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This manual is for Service, Factory and Customer. For products shipped from Fujitsu, the division
of labor described in each section is as follows.
section
division
4. Unpacking the InRackCDU System
Factory
5. Installation
5.1 Mounting the CDU Cabinet
Factory
5.2 Installing the Facility Hoses to the CDU Cabinet
Factory
5.3 Mounting the CDMs to the Rack
Factory
5.4 Connecting CDU Cabinet to CDM
Factory
5.5 Mount Ventilation Tube for Reservoir
Ventilation Tube
Service
Drain Tube
Customer
5.6 Connect Power and Networking to Monitoring System
Service
5.7 Install 3rd Party External Leak Sensors
Customer
5.8 Configure Monitoring System on Network
Default static IP address & subnet mask
Customer
Recommended Setting of Monitoring System
Customer
Status
Service
6. System Startup
Customer
7. Routine Maintenance
Service
8. Other Abnormalities and Failures #
Customer
# In case of any other Abnormalities and Failures, the CDU cabinet or CDM will be replaced,
and Service-Task will be changed to special care. Please contact your supplier.
The InRackCDU system ships out from the factory in a rack.
When the customer orders the InRackCDU system and LC Server at the same time, the water-
cooled tubes that connect the InRackCDU system and LC Server are connected by the factory.

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3 Tools & Materials Required
The following tools and supplies are needed to unpack and install the InRackCDU System:
Tool
Usage
Prepared by
Screwdriver with Phillips #2
to install CDU cabinet and CDM into Rack
Factory
Tin Snips
to open packing box
Factory
Box Cutter or Utility knife
to open packing box
Factory
8mm open-end wrench
to install CDM to Rack
Factory
22mm open-end wrench
to open fillcap of reservoir tank.
Service
Bucket
to make ventilation of Facility Water
Customer
Funnel(end size is 18mm or less)
to fulfill reservoir with coolant
Customer
Network Cross cable
(RJ45 to RJ45) min. 2m in length
to startup monitoring system
Service
& Customer
Laptop with wired network port
to set up network addresses in monitoring
system
Service
Server lift
to raise and install CDU cabinet into rack
Factory
Wet and Dry vacuum cleaner
to remove water on floor in case of leakage
Customer
O-ring
To replace in case of filling coolant to
reservoir tank
Customer#
Service #
# 10pcs. of O-rings are attached CDU cabinet as accessory, and customers keep them.
In case of that 10pcs. finish or customer lost, Service must be order as spare parts.
4 Unpacking the InRackCDU System
WARNING: Removing and installing the CDU Cabinet and CDM is at minimum a three-person job. The
CDU Cabinet weighs 80kg and needs to be lifted to the top U-space in the rack. It is recommended that
installers use a lift to get the cabinet into the rack
1. The CDU Cabinet and CDMs will arrive in several boxes atop a wooden pallet packed in a cardboard
shipping carton. The weight and dimensions (LxWxH) are:
a. HEX Cabinet: 80kg, 116cm x 75cm x 27cm (3’ 9.6” x 2’ 5.5” x 10.6”)
b. CDM Pair (42U): 15kg, 180cm x 18cm x 16cm (5’ 10.9” x 7.1” x 6.3”)
c. CDM Pair (48U): 17kg, 224cm x 25cm x 13cm (7’ 4.2” x 9.2” x 5.1”)
2. Cut the strapping that holds the cardboard shipping carton to the pallet with the tin snips.
3. Lift the cardboard carton lid off of the HEX Cabinet and CDMs and remove any packing foam inserts.
4. Care should be taken to remove the HEX Cabinet from the crate as it weighs approximately 80kg.
Two or more people are needed to lift the HEX Cabinet vertically from its packaging.
5. Move the HEX Cabinet and CDM clear of the pallet and set on a raised surface.
6. Be careful not to damage the drain tube exiting the rear of the CDU Cabinet.

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5 Installation
IMPORTANT: Do not power on server nodes at this point. Section 6 –System Startup, will outline when
servers should be powered on.
5.1 Mounting the CDU Cabinet
Mount the rails 4U spaces down from the top of the rack (i.e. U39 in a 42U rack or U45 in a 48U rack).
Ensure that rails are rated to support at least 80kg of weight. The CDU Cabinet weighs approximately 80kg
(~180lbs) and a server lift should be used to lift and place inside of the rack.
The screws that are pressed into the CDU Cabinet are M5. Install an M5 cage nut into the rack.
5.2 Installing the Facility Hoses to the CDU Cabinet
Facility tube connections are available on the rear right side of the CDU Cabinet. The facility liquid supply
and return lines are marked with an “S” and “R”, respectively. The supply hose will have a female Camlock
and the return hose will have a male Camlock.
Remove the protection caps from the return and supply connections. Insert the provided EPDM gasket
between the flanges and install the tri-clamp locking ring.
For bottom feed connections, the minimum size opening that needs to be cut in the floor tile is 150mm x
150mm.
Important: For rack widths 700mm, install the pipe adapter in between the facility pipe connection
on the CDU and facility hose.
Pipe adapter