Rittal Liquid Cooling Package Plus SK 3301.480... Manual

Rittal
Liquid Cooling Package Plus
Operating and Maintenance Instructions
Rittal Liquid Cooling Package Plus
Model No. SK 3301.480 (230 / 400 V version)

2Operating and Maintenance Instructions
Rittal Liquid Cooling Package Plus
Foreword Dear Customer!
We would like to thank you for choosing our Rittal Liquid Cooling Package Plus
(referred to hereafter as "Liquid Cooling Package Plus" or "LCP Plus").
Please take the time to read this documentation carefully.
Please pay particular attention to the safety instructions in the text and to
Chapter 2, "Safety instructions".
This is the prerequisite for:
- secure assembly of the Liquid Cooling Package Plus,
- safe handling and
- the most trouble-free operation possible.
Please keep the complete documentation readily available so that it is always
on hand when needed.
We wish you every success!
Your
Rittal GmbH & Co. KG
Rittal GmbH & Co. KG
Auf dem Stützelberg
35745 Herborn
Germany
Tel.: [phone]
Fax: [phone]
E-mail: [e-mail]
www.rimatrix5.com
We are always happy to answer any technical questions regarding our entire
range of products.

3Operating and Maintenance Instructions – Table of contents
Rittal Liquid Cooling Package Plus
Table of contents Foreword ................................................................................. 2
Table of contents ................................................................... 3
1 Identification ........................................................................... 5
1.1 Manufacturer ........................................................................................ 5
1.2 Notes concerning the documentation ................................................... 5
1.2.1 Other applicable documents ................................................................. 5
1.2.2 CE labelling .......................................................................................... 5
1.2.3 Nameplate ............................................................................................ 6
1.2.4 Storing the documents ......................................................................... 6
1.2.5 Legal information concerning the operating instructions .................... 6
1.2.6 Copyright .............................................................................................. 6
1.2.7 Revision ................................................................................................ 6
1.3 Product description ............................................................................... 7
1.3.1 Unit components .................................................................................. 7
1.3.2 Proper use ............................................................................................ 8
1.3.3 Precautionary measures ...................................................................... 8
2 Safety instructions ................................................................. 9
2.1 Symbols in these operating instructions ............................................... 9
2.2 Important safety instructions ................................................................ 9
2.3 Service and technical staff ................................................................. 10
2.4 RoHS compliance ............................................................................... 11
3 Transport and handling ....................................................... 12
3.1 Scope of delivery of Liquid Cooling Package Plus ............................. 12
3.2 Transport ............................................................................................ 12
3.3 Unpacking .......................................................................................... 12
4 Design and function ............................................................. 13
4.1 Design ................................................................................................ 13
4.1.1 Liquid Cooling Package Plus .............................................................. 14
4.1.2 Air/water heat exchanger ................................................................... 16
4.1.3 Fan module ........................................................................................ 16
4.1.4 Water module with cold water connection .......................................... 18
4.2 Function .............................................................................................. 19
4.3 Air routing inside the enclosure .......................................................... 22
4.3.1 Possibilities for establishing redundancies ......................................... 24
5 Technical specifications ...................................................... 26
6 Installation – "Getting Started" ........................................... 27
6.1 Installation conditions ......................................................................... 27
6.2 Assembling the Liquid Cooling Package Plus .................................... 28
6.2.1 Preparatory work on the server enclosure ......................................... 28
6.2.2 Installation and baying of the Liquid Cooling Package ....................... 32
6.2.3 Assembly of the side panel on the Liquid Cooling Package Plus ....... 34
6.3 Fan installation ................................................................................... 35
6.3.1 Removing a fan module ..................................................................... 35
6.3.2 Installing a fan module ....................................................................... 38
6.4 Connecting the Liquid Cooling Package Plus .................................... 40
6.4.1 Electrical connection .......................................................................... 40
6.4.2 Cooling water connection ................................................................... 45
6.4.3 Condensate discharge connection ..................................................... 48
6.5 Cooling operation and control behaviour ............................................ 49
6.5.1 Cooling output .................................................................................... 49
6.5.2 Pressure loss ...................................................................................... 50
6.6 Operation ............................................................................................ 51
6.6.1 General ............................................................................................... 51
6.6.2 Operation in stand-alone mode .......................................................... 53
6.7 Extended Basic CMC options with network connection ..................... 55

4Operating and Maintenance Instructions – Table of contents
Rittal Liquid Cooling Package Plus
6.7.1 Visualisation ....................................................................................... 57
7 Hardware and software ........................................................ 71
7.1 Liquid Cooling Package Plus control unit ........................................... 71
7.1.1 Hardware ............................................................................................ 71
7.2 Control unit for fan module (RLCP fan) .............................................. 74
7.2.1 Hardware ............................................................................................ 74
7.2.2 Status LED ......................................................................................... 75
7.2.3 Control unit for water module (RLCP water) ...................................... 76
7.3 Hardware ............................................................................................ 76
7.3.1 Staus LED .......................................................................................... 77
8 Maintenance ......................................................................... 78
9 Troubleshooting ................................................................... 79
10 Frequently asked questions (FAQ) ..................................... 81
11 Glossary ................................................................................ 85
12 Spare parts ........................................................................... 87
13 Accessories .......................................................................... 88
13.1 Accessories Liquid Cooling Package ................................................. 88
13.2 Accessories from the rack program .................................................... 88
14 Further technical information ............................................. 89
14.1 Hydrological information ..................................................................... 89
14.2 Characteristic curves .......................................................................... 90
14.2.1 Cooling output .................................................................................... 90
14.2.2 Pressure loss ...................................................................................... 91
14.3 Overview diagram .............................................................................. 92
14.4 Circuit diagram ................................................................................... 94
14.5 Water circulation diagram ................................................................... 95
Installation checklist ................................................... 96
Preparation and maintenance of the water in recooling
systems ...................................................................... 100

5Operating and Maintenance Instructions – 1 Identification
Rittal Liquid Cooling Package Plus
1 Identification
1.1 Manufacturer
1.2 Notes concerning the
documentation
1.2.1 Other applicable documents In conjunction with these operating and maintenance instructions, the superor-
dinate 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 operating and maintenance instructions. This also
applies to failure to comply with the valid documentation for accessories used.
1.2.2 CE labelling With the EU declaration of conformity, Rittal GmbH & Co. KG, the manufacturer,
certifies that the cooling units of the Liquid Cooling Package Plus series are ma-
nufactured and tested in accordance with the following directives:
- EU EMC directive 89/336/EEC (annex 92/31EC and 93/68/EC)
- EU Low Voltage Directive 2006/95/EC
- EN 55022
Information technology equipment - Radio disturbance characteristics
- EN 60335-1
Safety for household and similar electrical appliances
Part 1: General requirements
- EN 61000 3-2
Electromagnetic compatibility (EMC)
Part 3-2: Limits - Limits for harmonic current emissions (equipment input cur-
rent up to and including 16 A per phase)
- EN 61000 6-2
Electromagnetic compatibility (EMC)
Part 6-2: Generic standards - Immunity for industrial environments
- EN 61000 6-3
Electromagnetic compatibility (EMC)
Part 6-3: Generic standards - Emission standard for residential, commercial
and light-industrial environments
The cooling unit bears the following mark.
Manufacturer Rittal GmbH & Co. KG
Address: Auf dem Stützelberg
City: 35745 Herborn
Germany
Telephone: [phone]
Telefax: +49 (0) 27 72/50 5-23 19
E-mail: [email protected]
Internet: www.rimatrix5.com

6Operating and Maintenance Instructions – 1 Identification
Rittal Liquid Cooling Package Plus
1.2.3 Nameplate
Fig. 1: Nameplate
1.2.4 Storing the documents The operating and maintenance instructions as well as all applicable docu-
ments are integral components of the product. They must be handed out to tho-
se persons who are engaged with the unit and must always be available and
on hand for operating and maintenance personnel.
1.2.5 Legal information
concerning the operating
instructions
We reserve the right to make changes in content. Rittal GmbH & Co. KG is not
responsible for mistakes in this documentation. Liability for indirect damages
which occur through the delivery or use of this documentation is excluded to
the extent allowable by law.
1.2.6 Copyright The distribution and duplication of this document and the disclosure and use of
its contents are prohibited unless expressly authorised.
Offenders will be liable for damages. All rights created by a patent grant or re-
gistration of a utility model or design are reserved.
1.2.7 Revision Rev. 1 of 19. April 2007
Year of construction
Fabr.-Nr.:
Production No.
Luft/Wasser-Wärmetauscher
Air/water heat exchanger
Echangeur de temperature air/eau
Lucht/Water-Warmtewisselaar
Luft/vatten vaermevaexlare
Scambiatore di calore ad aria/acqua
Intercambiador de calor aire/agua
WA ----- / ---
SK 3301 480
35745 Herborn
RITTAL
GmbH & Co.KG
Auf dem Stützelberg
Protective category
Baujahr
Gewicht
Weight
Schutzart
EN 60529
Noise level
IP40
230 kg (507 pounds)
:
:
:
28/28 kW
Rated voltage
Nominal cooling
Useful cooling output
Volumenstrom L/h
Geräuschpegel
Nennleistung
Nutzkühlleistung L35 W15
output
Bemessungsstrom
Vorsicherung T
Rated current
Pre-fuse T
64 dB(A)
:
2400/2650 W
3,5/3,8 A
10 A
:
:
:
:
Bemessungsspannung
: 400V/3~/N/PE 50/60Hz
3600 L/h
Wasser (siehe Spezifikation)
Water (see specification)
Kühlmedium
Coolant
+6˚C bis to +35˚C (+43˚F to +95˚F)
2-5 bar (29-73 psi)
:
:
:
POH O
2
PT H O
210 bar (174 psi)
:
TOAir
+6˚C bis to +35˚C (+43˚F to +95˚F)
:
TS Air
28/28 kW
2400/2650 W
10,5/11,5 A
16 A
: 230V/1~ 50/60Hz
3600 L/h

7Operating and Maintenance Instructions – 1 Identification
Rittal Liquid Cooling Package Plus
1.3 Product description
1.3.1 Unit components
Fig. 2: Liquid Cooling Package Plus (front)
1 Rack (H x W x D: 2000 mm x 300 mm x 1200 mm)
2LCPdoor
3 Touch panel
4 Wall plate (wide) with air outlet
5 Wall plate (narrow) with air inlet
6 Levelling foot
5
4
6
3
2
1

8Operating and Maintenance Instructions – 1 Identification
Rittal Liquid Cooling Package Plus
Fig. 3: Liquid Cooling Package Plus - rear
1 Mains connection
2 Control unit (Basic CMC)
3LCPdoor
4Fan
5 Fan control unit
6 Water module control unit
7 Water module
8 Levelling foot
1.3.2 Proper use The Liquid Cooling Package Plus serves to dissipate high heat losses and for
the effective cooling of devices built into a server enclosure.
The unit is state of the art and built according to recognised safety regulations.
Nevertheless, improper use can present a hazard to life and limb of the user or
third parties, or result in possible impairment of the system and other property.
The unit should thus only be used properly and in technically sound condition.
Any malfunctions which impair safety should be rectified immediately! Follow
the operating instructions!
Intended use also includes following the operating instructions and fulfilling the
inspection and maintenance conditions.
1.3.3 Precautionary measures Inappropriate use may result in danger. Inappropriate use may include:
- Use of impermissible tools.
- Improper use.
- Improper rectification of malfunctions.
- Use of replacement parts which are not authorised by Rittal GmbH & Co. KG.
7
1
2
5
4
4
3
6
8

9Operating and Maintenance Instructions – 2 Safety instructions
Rittal Liquid Cooling Package Plus
2 Safety instructions The Liquid Cooling Packages Plus (LCP Plus) produced by Rittal GmbH & Co.
KG are developed and produced with due regard to all safety precautions. Ne-
vertheless, the unit still causes a number of unavoidable dangers and risks. The
safety instructions provide you with an overview of these dangers and the ne-
cessary safety precautions.
In the interest of your safety and the safety of others, please read these safety
instructions carefully before assembly and commissioning of the Liquid Cooling
Package Plus.
Follow the user information found in these instructions and on the unit carefully.
2.1 Symbols in these
operating instructions
These following symbols are found in this documentation:
• This symbol indicates an "Action Point" and shows that you should carry out
an operation/procedure.
2.2 Important safety
instructions
Danger!
This warning symbol is used to indicate great dangers caused by the
product which may result in injury and even death if the indicated pre-
ventative measures are not followed.
Caution!
This warning symbol is used to indicate procedures which may cause
risk of equipment damage or personal injury.
Note:
This instruction symbol indicates information concerning individual proce-
dures, explanations, or tips for simplified approaches.
Danger! Electric shock!
Contact with live electrical parts may be deadly.
Before switching on, ensure that it is not possible to come into contact
with live electrical parts.
Danger! Injury caused by fan impellors!
Keep persons and objects away from the fan impellors! Do not remove
covers until the power supply is disconnected and impellors are not
moving! Always use mechanical protection when working! Shut down
the respective fan as much as possible during maintenance work! Tie
long hair back! Do not wear loose clothing!
Fans start up automatically following power disruptions!
Danger! Cut wounds, especially through sharp edges of the fan module
and heat exchanger modules!
Put on protective gloves before beginning assembly or cleaning work!

10 Operating and Maintenance Instructions – 2 Safety instructions
Rittal Liquid Cooling Package Plus
2.3 Service and technical staff The installation, commissioning, maintenance and repair of this unit may only
be carried out by qualified mechanical and electro-technical trained personnel.
Only properly instructed personnel may carry out service on a unit while in ope-
ration.
Danger! Injury due to falling loads!
Do not stand under suspended loads when transporting the unit with a
hoist trolley, a forklift, or a crane.
Caution! Risk of malfunction or damage!
Do not modify the unit! Use only original spare parts!
Caution! Risk of malfunction or damage!
Proper and flawless unit operation can only be ensured when it is ope-
rated under the intended ambient conditions. As far as possible, be
sure that the ambient conditions for which the unit is designed are com-
plied with, e.g. temperature, humidity, air purity.
Caution! Risk of malfunction or damage!
All media necessary for the control system, e.g. cooling water, must be
available during the entire operating time.
Caution! Risk of malfunction or damage!
In order to avoid frost damage, the minimum permissible input water
temperature of +6 °C must not be undercut at any point in the water cy-
cle!
It is vital that the manufacturers’ consent is obtained before adding
anti-freeze!
Caution! Risk of malfunction or damage!
During storage and transportation below freezing point, the water cycle
should be drained completely using compressed air!
Caution! Risk of malfunction or damage!
Only set the temperature control setpoint as low as is strictly necessa-
ry, since the danger of condensation through undercutting the dew
point increases with a falling water inlet temperature!
Ensure that the enclosure is sealed on all sides, particularly at the cable
entry (condensation)!

11 Operating and Maintenance Instructions – 2 Safety instructions
Rittal Liquid Cooling Package Plus
2.4 RoHS compliance The Liquid Cooling Package Plus fulfils the requirements of EU directive 2002/
95/EC on the Restriction of Use of Certain Hazardous Substances in Electrical
and Electronic Equipment (RoHS) of 13 February, 2003.
Note:
Corresponding information concerning the RoHS directive is provided by
our firm on the Internet at www.rittal.de/RoHS.

12 Operating and Maintenance Instructions – 3 Transport and handling
Rittal Liquid Cooling Package Plus
3 Transport and hand-
ling
3.1 Scope of delivery of Liquid
Cooling Package Plus
The scope of delivery of a Liquid Cooling Package Plus (LCP Plus
Model No. SK 3301.480) includes:
Tab. 1: Scope of delivery of a Liquid Cooling Package Plus
3.2 Transport The Liquid Cooling Package Plus is delivered shrink-wrapped on a pallet.
3.3 Unpacking • Remove the unit's packaging materials.
• Check the unit for damages occurring in transport.
• Place the unit in its intended location.
Qty. Parts
1 Liquid Cooling Package Plus with LCP Plus, ready for connection
Accessories:
1 • Pipe fitting condensate pump
1 • Condensate hose for condensate pump
1 • Condensate hose emergency overflow
1 • Sealing strip
1 • Connection plug
1 • Cable tie and spreading anchor
1 • Jumper for connection plug (strain relief for connection cable)
4 • Eyebolts
1 Assembly instructions
Caution!
Because of its height and small base, the Liquid Cooling Package Plus
is subject to tipping. Risk of toppling, especially after the unit is remo-
ved from the pallet!
Caution!
Transport of the Liquid Cooling Package Plus without a pallet:
- Use only suitable and technically sound lifting gear and load-bearing
devices with sufficient load capacity.
Note
After unpacking, the packaging materials must be disposed of in an environ-
mentally friendly way. They may consist of the following materials:
-Wood,
- Polyethylene film (PE film),
-Strap,
- Edge protectors.
Note
Damage and other faults, e.g. incomplete delivery, should immediately be
reported to the shipping company and to Rittal GmbH & Co. KG in writing.

13 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
4 Design and function
4.1 Design The schematic design is seen in the following illustration:
Fig. 4: Schematic design of a Liquid Cooling Package Plus
1 Control unit Basic CMC)
2Fan1
3Fan2
4Fan3
5Fan4
6Fan5
7Fan6
8 Air/water heat exchanger
9 Water module
The Liquid Cooling Package Plus consists of a superordinate control unit (Basic
CMC), a water module, a heat exchanger, and six fan modules. Fans, in groups
of two, and the water module contain their own electronic controls (3 x RLCP
fan and 1 x RLCP water), which are connected to one another over an I2C bus.
4
6
9
8
2
3
5
7
1

14 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
4.1.1 Liquid Cooling Package Plus
Fig. 5: Liquid Cooling Package Plus (front)
1 Rack (H x W x D: 2000 mm x 300 mm x 1200 mm)
2LCPdoor
3 Touch panel
4 Wall plate (wide) with air outlet
5 Wall plate (narrow) with air inlet
6 Levelling foot
5
4
6
3
2
1

15 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
Fig. 6: Liquid Cooling Package Plus - rear
1 Mains connection
2 Control unit (Basic CMC)
3LCPdoor
4Fan
5 Fan control unit
6 Water module control unit
7 Water module
8 Levelling foot
The Liquid Cooling Package Plus consists of a solid welded frame in which the
heat exchanger, fan modules, and the water module are installed. The frame
stands on four levelling feet, which may be used to align the unit with the bayed
server enclosure. One wide and one narrow wall plate are mounted on both the
left and right sides. A vertical divider plate is positioned at the joint of the two
plates, which separates the Liquid Cooling Package Plus into warm and cold
air sections.
The wide wall plates on the front right and left sides of the device form the cold
air section together with the divider plate and the built-in air/water heat ex-
changer. The wall plates have been punched with air outlet openings along
their entire length in the front and rear to ensure cold air supply to the server
and rejected hot air supply to the heat exchanger.
The narrower wall plates close off the rear of the device and form the warm air
section together with the divider plate. The wall plates have been punched with
air inlet openings along their entire height and width to ensure the removal of
warm air from the server.
Eight shelves are positioned between the wall plates that divide the Liquid Coo-
ling Package Plus into five installation spaces of differing heights. The control
unit (Basic CMC) sits on the top shelf. Installation spaces for the fans and con-
trol units for the six fan modules are located below. All components of the coo-
ling water supply and condensate management are integrated into the water
module on the floor of the Liquid Cooling Package Plus.
7
1
2
5
4
4
3
6
8

16 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
The front door completely seals the Liquid Cooling Package Plus. The graphi-
cal display (touchscreen) for operation in stand-alone mode is located on the
front. Behind the display is a partitioning plate that closes off the cold air section
to the front. The door on the rear side of the device only seals off the Liquid Coo-
ling Package Plus in the upper section of the device. The lower section is co-
vered with a U-shaped plate. The possible connection line to the cold water
network and the condensate discharge hoses are run out of the Liquid Cooling
Package Plus through the resulting opening.
4.1.2 Air/water heat exchanger The air/water heat exchanger is installed in the front section of the Liquid Coo-
ling Package Plus between both of the front wall plates. The heat exchanger is
covered with a spray eliminator on the air outlet side that catches any occurring
condensate and directs it to the condensate collecting tray in the Liquid Coo-
ling Package Plus. Three temperature sensors are mounted on the front side of
the spray eliminator at the level of the fan modules. The sensors record the tem-
perature of the cold air that is blown in (server-in temperature) and transfer it to
the control.
4.1.3 Fan module
Fig. 7: Fan module
1Fan
2 Rack-mounted shelf
3 Control unit for fan module (RLCP fan)
4 T handle
A fan module consists essentially of one fan that is mounted an angle bracket.
One control unit (RLCP fan) controls two fan modules. The fans may be opera-
ted at four output levels and are activated by four relays. (Both fans always ope-
rate at the same output level.)
The fan modules are installed on rack-mounted shelves in the rear section of
the Liquid Cooling Package Plus with the control unit in between. Each shelf
has slide rails on the longitudinal sides. The angle brackets with the fans are
inserted into and held in the rails.
1
2
3
4

17 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
Fig. 8: Fan module
1Fan
2 Angle bracket
3 Connector for power supply and control cable
The angle bracket consists of two long plate pieces. The longer of the two forms
the base plate and the shorter (vertical) one supports the fan and the connector
for the power supply and the control cable. The air outlet vent of the fan projects
forward from a circular opening on the vertical plate piece. When the fan mo-
dule is installed, the air outlet vent extends into the cold air section of the device
and facilitates a trouble-free and direct routing of the air from the fan module to
the air/water heat exchanger.
Because the individual fan modules are located on separate angle brackets, it
is possible to remove a single fan module and replace it easily during operation
by opening the T handle (hot pluggable). It takes about 30 seconds to replace
a fan module (see chapter 6.3, "Fan Installation").
1
3
2

18 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
4.1.4 Water module with cold
water connection
Fig. 9: Water module with cold water connection
1 Two-way control valve
2 Leakage sensor
3 Cooling water flow with temperature sensor
4 Cooling water return with temperature sensor
5 Condensate pump
6 Condensate sensor (floating switch)
7 Flow sensor
8 Condensate collecting tray
A significant component of the water module is the stainless steel condensate
collecting tray, on which a level sensor, a condensate pump, and a condensate
overflow are located.
A hose line leads the condensate from the condensate pump out of the Liquid
Cooling Package Plus through the rear. Additionally, the condensate tray is
equipped with a no pressure condensate overflow in case either the level sen-
sor or the condensate pump should malfunction. This is located underneath the
condensate pump and also leads the condensate to the rear, out of the Liquid
Cooling Package Plus. Both hoses should be connected to either a collecting
device or an external drain.
The pipework for the Liquid Cooling Package's Plus cooling water connection
(inlet and return) runs on the side, above the condensate collecting tray. The
lines connect the rear-mounted cooling water connection with the air/water heat
exchanger that is built into the front of the device. The lines are insulated to avo-
id the formation of condensation. A motor-operated control valve is located in
the cooling water return line. This control valve can control the cooling water
flow.
The control unit of the water module is mounted with a holder on a separate
mounting plate directly behind the rear door of the Liquid Cooling Package
Plus, above the water module at the level of the lower fan module.
The cooling water connection is connected to the main connections of the coo-
ling water return by two 1" externally threaded pipes. The connecting pieces of
both pipes are composed of T pieces, to allow for the option of connecting from
the rear or through the raised floor.
The cooling water connection to the cold water network can be made by either
rigid pipework or flexible hoses, which are available from the Rittal accessory
range (Model No. SK 3301.351).
8654
123
7

19 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
4.2 Function The Liquid Cooling Package Plus (LCP Plus) is essentially an air/water heat ex-
changer. It serves to dissipate high heat losses from server enclosures or for
the effective cooling of devices built into a server enclosure.
The Liquid Cooling Package Plus may, as desired, be bayed on the right or left
of a server enclosure.
Fig. 10: Liquid Cooling Package Plus on a server enclosure
The Liquid Cooling Package Plus may also be bayed between two server en-
closures.
Fig. 11: Liquid Cooling Package Plus between two server enclosures
Together with the bayed server enclosures, the Liquid Cooling Package Plus
forms an airtight cooling system with horizontal air routing. It places no additio-
nal demands on the room's climate control system.
The air routing in the LCP Plus supports the "front to back" cooling principle of
the devices built into the server enclosure. The fan modules draw the warm air
exhausted from the devices in the server enclosure in the entire height of the
rear area into the Liquid Cooling Package Plus, which is bayed to the side, and
then into the heat exchanger module.
In the heat exchanger module, the heated air is directed through an air/water
heat exchanger, and its thermal energy (heat losses from the server) is trans-
ferred to a cold water system. Through this, the air is cooled to a freely selec-

20 Operating and Maintenance Instructions – 4 Design and function
Rittal Liquid Cooling Package Plus
table temperature and then routed in front of the 482.6 mm (19") level in the
server enclosure.
Fig. 12: Air routing on the Liquid Cooling Package Plus (top view)
1Fanmodule
2 Air inlet
3 Heat exchanger
4 Air outlet
5 2nd air inlet (optional)
6 2nd air outlet (optional)
The temperature control of the cold air which is blown in takes place through
constant comparison of the actual temperature with the setpoint temperature
set on the Liquid Cooling Package Plus' control unit (default is +20 °C).
If the setpoint temperature is exceeded, the control valve in the cooling water
system opens, and the heat exchanger is provided with cold water. The control
valve is infinitely variable (can open from 0 to 100%). In addition, the tempera-
ture differential between the cold air that is blown in and the warm air that is
drawn is used to determine and set the fan speed. The control attempts to keep
the air temperature constant in front of the 482.6 mm (19") level by activating
the control valve.
Any condensate which may develop is collected in the condensate collecting
tray that is integrated in the water module of the Liquid Cooling Package Plus.
Upon reaching a defined condensate level in the collecting tray, the level sen-
sor activates the condensate pump. The pump leads the condensate out of the
Liquid Cooling Package Plus. Further, a condensate overflow hose leads from
the tray to the exterior, so that, if necessary, (e.g. in the event of a defective level
sensor or a defective condensate pump) liquid is led away.
3
25
46
1
Note:
The water flow temperature should always be set so that the temperature ne-
ver falls below the dew point (cf. Fig. 13).