FRIEDHELM LOH Rittal SK 3185330 User manual

Enclosure cooling unit
Assembly and operating instructions
SK 3185330
SK 3186330
SK 3187330
SK 3188340
SK 3189340

Preface
EN
2Rittal enclosure cooling unit Blue e+ Outdoor
Preface
Dear Customer!
Thank you for choosing a "Blue e+ Outdoor" enclosure
cooling unit (referred to hereafter as "cooling unit") from
Rittal.
Yours
Rittal GmbH & Co. KG
Rittal GmbH & Co. KG
Auf dem Stützelberg
35745 Herborn
Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
www.rittal.com
www.rittal.de
We are always happy to answer any technical questions
regarding our entire range of products.
EN

Rittal enclosure cooling unit Blue e+ Outdoor 3
Contents
EN
Contents
1 Notes on documentation .................. 4
1.1 CE labelling................................................... 4
1.2 Storing the documents.................................. 4
1.3 Symbols used in these operating
instructions ................................................... 4
1.4 Other applicable documents ......................... 4
2 Safety instructions ............................ 5
2.1 General safety instructions ............................ 5
2.2 Safety instructions for transportation............. 5
2.3 Safety instructions for assembly.................... 5
2.4 Safety instructions for installation .................. 5
2.5 Safety instructions for operation.................... 5
2.6 Safety instructions for maintenance............... 5
2.7 Operating and technical staff......................... 5
2.8 Other dangers when using the cooling unit ... 5
2.9 IT safety instructions ..................................... 6
2.9.1 Measures for products and systems ..................... 6
3 Product description .......................... 7
3.1 Functional description and components........ 7
3.1.1 Function ............................................................... 7
3.1.2 Components ........................................................ 8
3.1.3 Control ................................................................. 8
3.1.4 Safety devices ...................................................... 8
3.1.5 Condensation ....................................................... 8
3.1.6 Door limit switch ................................................... 8
3.2 Intended use, foreseeable misuse ................. 9
3.3 Scope of supply.......................................... 10
4 Transport and handling .................. 12
4.1 Delivery....................................................... 12
4.2 Unpacking .................................................. 12
4.3 Transport .................................................... 12
5 Installation ...................................... 14
5.1 Safety instructions....................................... 14
5.2 Siting location requirements ........................ 14
5.3 Assembly procedure ................................... 15
5.3.1 Assembly instructions ......................................... 15
5.3.2 Mounting options ............................................... 16
5.3.3 Make a mounting cut-out in the enclosure .......... 17
5.3.4 Fitting the cooling unit without a mounting frame 17
5.3.5 Fitting the cooling unit with a mounting frame ..... 20
5.3.6 Connect the condensate water discharge
(optional) ............................................................ 22
5.4 Electrical connection ................................... 23
5.4.1 Notes on electrical installation ............................. 23
5.4.2 Install the power supply ...................................... 25
5.4.3 Connect the alarm relays .................................... 26
5.4.4 Interfaces ........................................................... 26
6 Commissioning .............................. 28
7 Operation ....................................... 29
7.1 General....................................................... 29
7.2 Layout of the display ................................... 29
7.2.1 Start screen ........................................................ 29
7.2.2 Changing a parameter value ............................... 30
7.3 Information menu ....................................... 30
7.3.1 Temperature information .................................... 30
7.3.2 Device information .............................................. 30
7.3.3 Efficiency information .......................................... 31
7.4 Configuration menu.................................... 31
7.4.1 Temperature ....................................................... 31
7.4.2 Network ............................................................. 33
7.4.3 Alarm relays ....................................................... 34
7.4.4 Language settings .............................................. 34
7.4.5 Self-test .............................................................. 34
7.5 System messages...................................... 34
7.5.1 Occurrence of a malfunction ............................... 35
7.5.2 Display in case of errors ..................................... 35
7.5.3 Parallel device control ......................................... 35
7.6 List of system messages............................ 36
8 Inspection and maintenance ........... 39
8.1 Safety instructions for maintenance work ... 39
8.2 Notes on the refrigerant circuit ................... 39
8.3 Maintenance work on the cooling unit ........ 39
8.4 Compressed air cleaning............................ 39
8.4.1 Removing the cover ........................................... 39
8.4.2 Cleaning the components with compressed air .. 40
8.4.3 Re-fitting the cover ............................................. 40
9 Storage and disposal ...................... 41
10 Technical specifications .................. 42
11 List of spare parts ........................... 45
12 Drawings ........................................ 46
12.1 Mounting cut-outs on single-walled enclosure
panels without a mounting frame ............... 46
12.2 Mounting on single- and twin-walled
enclosure panels with a mounting frame .... 47
12.2.1 SK 3185330 ....................................................... 47
12.2.2 SK 3186330, SK 3187330, SK 3188340,
SK 3189340 ....................................................... 48
12.3 Dimensions and installation depths ............ 49
12.3.1 External mounting, partial internal mounting and
full internal mounting (SK 3185330) .................... 49
12.3.2 External mounting, partial internal mounting and
full internal mounting (SK 3186330 and
SK 3187330) ...................................................... 50
12.3.3 External mounting, partial internal mounting and
full internal mounting (SK 3188340 and
SK 3189340) ...................................................... 51
13 Accessories .................................... 52
14 Customer service addresses .......... 53
15 Compact service information .......... 57

1 Notes on documentation
EN
4Rittal enclosure cooling unit Blue e+ Outdoor
1 Notes on documentation
1.1 CE labelling
Rittal GmbH & Co. KG confirms the conformity of the
cooling unit with the European Union's Machinery Direc-
tive 2006/42/EC and EMC Directive 2014/30/EU. A sim-
plified declaration of conformity can be found in the as-
sembly and installation instructions enclosed with the
device (see also the Rittal website). These are the origi-
nal operating instructions.
1.2 Storing the documents
The assembly and operating instructions as well as all
other applicable documents are an integral part of the
product. They must be issued to everyone who works
with the unit and must always be available and on hand
for operating and maintenance personnel.
1.3 Symbols used in these operating in-
structions
The following symbols are used in this documentation:
This symbol indicates an "action point" and shows that
you should perform an operation or procedure.
1.4 Other applicable documents
Assembly and operating instructions exist as paper doc-
uments for the unit types described here and are en-
closed with the equipment.
We cannot accept any liability for damage associated
with failure to observe these instructions.
Please also observe the instructions for any accesso-
ries used.
Warning!
Hazardous situation which may lead to
death or serious injury if the instructions
are not followed.
Caution!
Hazardous situation which may lead to
(minor) injuries if the instructions are not
followed.
Note:
Indicates situations that can lead to material
damage.

Rittal enclosure cooling unit Blue e+ Outdoor 5
2 Safety instructions
EN
2 Safety instructions
2.1 General safety instructions
Please observe the following general safety instructions
for the installation and operation of the system:
– Always wear the required personal safety equipment
when working on this device.
– Before removing the hood, allow the unit to cool for at
least 10 minutes to eliminate the risk of burns from hot
surfaces.
– Please do not make any changes to the cooling unit
that are not described in these operating instructions
or other applicable assembly and operating instruc-
tions.
– The products should only be combined and operated
with the prescribed Rittal system accessories.
– Other than these general safety instructions, it is also
vital to observe the specific safety instructions when
carrying out the tasks described in the following chap-
ters.
2.2 Safety instructions for transportation
– Please observe the maximum permissible weight to be
lifted by one person. Use suitable lifting devices, if
needed.
– Cooling units must be transported in an upright posi-
tion and secured to prevent them from tipping over.
– Shipping braces (such as a structure made from
square timbers or boards) must be used when trans-
porting cooling units already mounted on the enclo-
sure. These braces support the cooling unit and pre-
vent it from slipping in case of impact.
– Use a sufficiently large pallet to prevent it tipping over.
– If the cooling unit has been mounted on a door, close
the door and keep it closed during transportation.
2.3 Safety instructions for assembly
– During assembly, the cooling unit is at risk of dropping
through the mounting cut-out.
– Do not assemble and re-activate the device until it is
completely dry.
2.4 Safety instructions for installation
– Please be sure to observe the applicable regulations
governing electrical installations of the country in
which the device is installed and operated as well as
national regulations for accident prevention. Please
also observe any internal company regulations, such
as work, operating and safety regulations.
– The connection regulations of the appropriate power
supply company are to be followed. Otherwise, there
is risk of injury from electric shock if the connection to
the unit is defective or connected incorrectly in any
way.
– Do not strip too much insulation from the connection
cable, otherwise the admissible clearance/creepage
distances from the terminal point may not be met.
– The cooling unit must be connected to the mains via
an all-pole disconnect to overvoltage category III (IEC
61058-1).
2.5 Safety instructions for operation
– The operational safety of the cooling unit is only war-
ranted if used as intended. The technical specifica-
tions and limit values stated must not be exceeded un-
der any circumstances. In particular, this applies to the
specified ambient temperature range and IP protec-
tion category.
– Operating the cooling unit in direct contact with ag-
gressive materials or inflammable gases and vapours
is prohibited.
– At ambient temperatures above 30 °C/86 °F, the sur-
face temperatures of the cooling unit may exceed the
threshold temperatures for 1st and 2nd degree burns
with contact times ≤1 second.
– At ambient temperatures below -7 °C/19.4 °F, the
surface temperatures of the cooling unit may drop be-
low the threshold values for frostbite with contact
times of ≤10 seconds.
2.6 Safety instructions for maintenance
– The device must only be cleaned by trained special-
ists. De-energise the device prior to cleaning.
– Never use flammable liquids for cleaning.
2.7 Operating and technical staff
– The assembly, installation, commissioning, mainte-
nance and repair of this cooling unit may only be per-
formed by qualified, trained personnel.
– Only properly instructed personnel may operate a
cooling unit with the system operational.
– Children and persons with limited cognitive/coordina-
tive abilities must not operate, maintain or clean the
unit or be allowed to use it as a toy.
2.8 Other dangers when using the cooling
unit
When installing the cooling unit (see section 5 "Installa-
tion"), there is a risk that the enclosure could become
unbalanced and tip over.
In such cases, the enclosure should be bolted to the
floor as a precaution.
There is also a risk of the cooling unit tipping over after
the mounting frame has been fitted onto the cooling unit.
The cooling unit is only stable whilst the mounting frame
is not fitted.
It is therefore particularly important to brace the unit
and prevent it from becoming unbalanced once the
mounting frame has been installed.
If the air inlet or outlet of the cooling unit is obstructed,
there is a risk of air short-circuits, resulting in inadequate
climate control.

2 Safety instructions
EN
6Rittal enclosure cooling unit Blue e+ Outdoor
Please ensure that the electronic assemblies in the en-
closure are installed in accordance with section 5.3.1
"Assembly instructions".
Where applicable, use suitable components to divert
the air.
Please observe the prescribed minimum distances at
the installation site as outlined in section 5.3.1 "As-
sembly instructions".
2.9 IT safety instructions
To ensure the availability, confidentiality and integrity of
data, products, networks and systems must be protect-
ed against unauthorised access.
Such protection can be achieved only with organisation-
al and technical measures. To satisfy the increased safe-
ty requirements, Rittal recommends the observance of
the following measures. Furthermore, more detailed in-
formation can be found on the websites of Bundesamt
für Sicherheit in der Informationstechnik (Federal Office
for IT Security – BSI).
2.9.1 Measures for products and systems
Embed products and systems not in public net-
works.
Make sure that the system is only operated in protect-
ed networks.
Configure the firewall
To protect your networks, and the embedded prod-
ucts and systems against external effects, configure a
firewall.
Also deploy a firewall for segmentation of a network or
to isolate a controller.
Consider defence-in-depth mechanisms during
the planning phase
Consider defence-in-depth mechanisms for your sys-
tem planning.
Defence-in-depth mechanisms cover several levels of
mutually coordinated security measures.
Restrict access authorisations
Restrict access authorisations to networks and sys-
tems to only persons that need an authorisation.
Protect accesses
Do not use the default passwords; instead, use se-
cure, long passwords containing numbers, a mix of
upper case and lower case letters, symbols and no
repetitions.
Create random passwords with a password manager.
Deploy the current firmware version
Ensure that the current Rittal firmware is deployed on
all devices.
The firmware can be downloaded from the associated
product pages in the Internet.
Observe the associated Release Notes for new firm-
ware versions.
Deploy current security software
To identify and eliminate security threats, such as vi-
ruses, trojans and other malicious software, security
software should be installed on all PCs and kept up-
to-date.
Deploy whitelist tools to monitor the device context.
Deploy an intrusion-detection system to validate the
communication of your system.
Perform regular threat analyses
Rittal recommends that you perform regular threat
analyses.
The threat analyses allow you to determine whether
your adopted measures are effective.
Protect USB ports against access
USB ports must be protected against physical access.
Ensure that no unauthorised persons have access to
USB ports.
Sensitive data can be read for an unauthorised access
to USB ports.

Rittal enclosure cooling unit Blue e+ Outdoor 7
3 Product description
EN
3 Product description
3.1 Functional description and components
3.1.1 Function
There are two separate cooling circuits installed in the
cooling unit.
– One conventional refrigerant circuit (compression sys-
tem), and
– One heat pipe integrated into the condenser and
evaporator coil.
Fig. 1: Cooling circuit
Key
1 Compressor
2 Condenser (dual version)
3Expansionvalve
4 Evaporator coil (dual version)
5 Refrigerant circuit with heat pipe
6 Refrigerant circuit with compression system
7 Internal circuit
8 External circuit
9 Dryer/collector
10 Internal fan
11 External fan
12 PSAHpressure monitor
In both cooling circuits, the individual components are
connected with pipes in which the refrigerant R134a is
circulating. This refrigerant is very environmentally friend-
ly, thanks to the following properties:
– Chlorine-free
– Does not deplete the ozone layer (ozone destruction
potential ODP = 0)
Refrigerant circuit with compression system
The refrigerant circuit with compression system is com-
prised of the following four main components:
1. Evaporator coil
2. Compressor
3. Condenser
4. Expansion valve
The evaporator coil fan draws hot air from the enclosure
in the internal circuit of the cooling unit and passes it
over the evaporator coil. After the evaporator coil, the
cooled air is fed back into the enclosure via the outlet
opening.
The air is cooled down by evaporating the refrigerant in
the evaporator coil. The refrigerant vapour is transported
by the compressor in the external circuit of the cooling
unit to the condenser. There, the refrigerant condenses
and becomes a liquid. The heat produced is dissipated
by the condenser fan. The downstream electronic ex-
pansion valve reduces the high pressure of the refriger-
ant, and the refrigerant is then fed back into the evapo-
rator coil.
Both the compressor and the two fans in the cooling unit
are activated via an inverter. This makes it possible to
control these components, so that the fan and compres-
sor may be activated for a longer time but at a lower out-
put and improved efficiency.
Refrigerant circuit with heat pipe
The additional second refrigerant circuit operates with-
out a compressor, expansion valve or other control ele-
ments, and is integrated into the evaporator coil and
condenser as a heat pipe.
The refrigerant inside the heat pipe (R134a) absorbs
thermal energy from the intake of enclosure air and
evaporates. The gaseous refrigerant then rises through
the pipeline until it reaches the condenser. The refriger-
ant is cooled down again in the condenser (provided Tu
< Ti), and the heat released is emitted into the environ-
ment. Gravity then causes the liquid refrigerant to flow
back down the pipelines. The whole cycle begins again.

3 Product description
EN
8Rittal enclosure cooling unit Blue e+ Outdoor
3.1.2 Components
Fig. 2: Main components of cooling unit (SK 3185330)
Key
1 Crane bracket
2Housing
3Ratingplate
4 Air inlet, inside
5Display
6 Electrical connections and interfaces
7 Air outlet, inside
8 Air inlet, outside
9Cover
10 Air outlet, outside
3.1.3 Control
Rittal enclosure cooling units are fitted with a controller
for setting the functions of the cooling unit.
Operation using this controller is described in section 7
"Operation".
3.1.4 Safety devices
– In the refrigerant circuit, the cooling units have a type-
tested pressure monitor (to EN 12263) which switches
off the cooling unit if the maximum admissible pres-
sure is exceeded. Once the pressure drops back be-
low the admissible pressure, the unit will automatically
resume operation.
– Temperature monitoring prevents the evaporator coil
from icing over. If there is a risk of icing, the compres-
sor switches itself off and automatically switches itself
back on again at higher temperatures.
– The compressor is monitored and protected by the in-
verter to prevent overloading.
– The fans have a built-in overload protection with auto-
matic reset.
– In order to allow a reduction of pressure inside the
compressor and hence a safe restart, once it has been
switched off (e.g. upon reaching the set temperature
via the door limit switch function or via de-energising),
the device will switch back on with a delay of 180 sec-
onds.
– The device has floating contacts on the connection
pins on terminals 1 and 3 of the signal connector (X2),
via which system messages from the device may be
polled, e.g. using a PLC.
3.1.5 Condensation
At high levels of humidity and low temperatures inside
the enclosure, condensate water may form on the evap-
orator coil.
The cooling units have an automatic electrical conden-
sate water evaporator. The thermal component used for
this purpose is based on self-regulating PTC technolo-
gy. Condensate water arising on the evaporator coil is
collected in a tank in the external circuit of the cooling
unit, and partially evaporated via the airflow. When the
water level rises, the water enters the PTC thermal com-
ponent and is evaporated (through-flow heater princi-
ple). The water vapour streams out of the cooling unit
with the airflow from the external fan.
The PTC thermal component is activated automatically
when the compressor is running, and continues to run
for around 15 minutes after the compressor has been
switched off. During the after-run phase, the condenser
fan will likewise continue to run at low speed.
In the event of a short-circuit in the PTC component or if
there is a risk of inverter overload (possible at high ambi-
ent temperatures), the PTC component will be deacti-
vated. This means that any condensate water arising
can be discharged via the safety overflow.
If the fuse has tripped, any condensate water is drained
off via the safety overflow. The condensation is routed
downwards out of the unit via a drain pipe on the evap-
orator coil divider panel. For this purpose, a hose may be
connected to the condensate water nozzle (see sec-
tion5.3.6 "Connect the condensate water discharge
(optional)").
3.1.6 Door limit switch
The cooling unit may be operated with a floating door
limit switch connected. The door limit switch is available
as accessory from Rittal (see section 13 "Accessories",
page52).
The door limit switch function causes the fans and the
compressor in the cooling unit to gradually slow down
and then switch off after approximately 15 seconds
when the enclosure door is opened (contacts 5 and 6
closed). This prevents the formation of condensate wa-
ter inside the enclosure while the enclosure door is
open. In order to prevent damage to the unit, it is
equipped with an ON delay: The evaporator fan will cut
in again after a delay of a few seconds on closure of the
door.
Please note that no external voltage may be applied to
the door contacts (connection clamps 5 and 6).
Note:
Illustration shows unit SK 3185330 as an ex-
ample.
1
2
3
8
9
10
1
4
5
6
7

Rittal enclosure cooling unit Blue e+ Outdoor 9
3 Product description
EN
3.2 Intended use, foreseeable misuse
The cooling unit is designed solely for cooling sealed en-
closures (within the scope of validity covered by
EN60204, EN 61439 and UL 508A), and IT and tele-
communications equipment (within the scope of validity
covered by EN 62368) within the permitted temperature
range, for indoor and outdoor use, and for professional
use as defined in DIN EN 61000-3-2. Any other use is
not permitted.
– Any form of use in potentially explosive areas, outside
the permissible temperature range, on power supply
systems not defined for this unit, on oil rigs and off-
shore installations, on transport routes in tunnels, in
commercial applications such as refrigeration cham-
bers, refrigerated counters and kiosk coolers, as well
as for room air-conditioning, is prohibited.
– The cooling unit is suitable for use in direct sunlight,
snow, rain, sand, dust and condensation.
– The unit is designed solely for stationary use.
The cooling unit must not be used in environments with
conductive, flammable and explosive dusts.
These include:
– Graphite dusts
– Metal dusts
– Cereal dusts
– Wood dusts
– Textile fibres and lint
The cooling unit is state of the art and built according to
recognised safety regulations. Nevertheless, improper
use can pose a threat to the life and limb of the user or
third parties, or result in possible damage to the system
and other property.
Consequently, the cooling unit must only be used prop-
erly and in a technically sound condition! Any malfunc-
tions which impair safety should be rectified immediate-
ly.
Proper use also includes the observance of the docu-
mentation provided, and compliance with the inspection
and maintenance conditions.
Rittal GmbH & Co. KG is not liable for any damage which
may result from failure to comply with the documenta-
tion provided. The same applies to failure to comply with
the valid documentation for any accessories used.
Inappropriate use may be dangerous. Examples of inap-
propriate use include:
– Use of the cooling unit over long periods with the en-
closure open.
– Use of impermissible tools.
– Improper operation.
– Improper rectification of malfunctions.
– Use of accessories not approved by Rittal GmbH &
Co. KG.

3 Product description
EN
10 Rittal enclosure cooling unit Blue e+ Outdoor
3.3 Scope of supply
Description Illustration SK 3185330 SK 3186330
SK 3187330
SK 3188340
SK 3189340
Enclosure cooling unit 1x
Shipping bag with 1x
– Assembly and installation instructions 1x
– Grub screw M8 x 40 mm 6x 8x
– Nut M8 6x 8x
–Washer 6x 8x
– Corner bracket 4x
– L-shaped bracket 2x 4x
– Screw M5x16 16x 20x
– Serrated washer 2x
– Sealing tape 10x10 mm L = 2.7 m L = 4.6 m
Tab. 1: Scope of supply

Rittal enclosure cooling unit Blue e+ Outdoor 11
3 Product description
EN
– Torx wrench TX25 1x
– Sealing section 1x
– Mounting frame 1x
– Signal connector 1x
– Connector 1x
–T-rail 1x
– Connection box cover 1x
– Ferrite core 1x
Description Illustration SK 3185330 SK 3186330
SK 3187330
SK 3188340
SK 3189340
Tab. 1: Scope of supply

4 Transport and handling
EN
12 Rittal enclosure cooling unit Blue e+ Outdoor
4 Transport and handling
4.1 Delivery
The cooling unit is supplied in one packaging unit.
Check the packaging carefully for signs of damage.
Traces of oil on damaged packaging indicate a loss of
refrigerant and/or a leak in the cooling unit. Any pack-
aging damage may be the cause of a subsequent
functional failure.
4.2 Unpacking
Remove the packaging materials from the cooling unit.
Check the cooling unit for any damage that may have
occurred during transport.
Check the supply contents for completeness (see sec-
tion 3.3 "Scope of supply").
4.3 Transport
Depending on the chosen version, the cooling unit may
weigh up to 73 kg.
There is a crane bracket pre-fitted to the top of the cool-
ing unit. The cooling unit is readily transported with the
aid of lifting gear and an indoor crane.
Fig. 3: Crane bracket on the top of the cooling unit
Key
1 Crane bracket
2Housing
Before transporting by crane, please ensure that the
lifting gear and crane have sufficient load capacity to
transport the cooling unit safely.
Never allow anyone to stand beneath a suspended
load, even for a short time, during transportation by
crane.
Protect the lifting gear on the crane hook from load de-
flection, because the load's centre of gravity may be
off-centre.
First position the cooling unit close to the installation
site and protect from accidentally being knocked over.
Transport of a fitted cooling unit
Shipping braces (such as a structure made from
square timbers or boards – fig. 4 and fig. 5) must be
used when transporting cooling units already mounted
on the enclosure.
These braces support the cooling unit and prevent it
from slipping in case of impact.
Use a sufficiently large pallet to prevent it from tipping
over.
If the cooling unit has been mounted on a door, close
the door and keep it closed during transportation.
Note:
After unpacking, the packaging materials
must be disposed of in an environmentally
friendly way.
Note:
Damage and other faults, e.g. incomplete de-
livery, should be reported immediately, in
writing, to the shipping company and to Rittal
GmbH & Co. KG.
Warning!
Please note the maximum weights that
may be lifted by individuals. It may be
necessary to use lifting gear.
Note:
For the "external" mounting position (see
section5.3.5 "Fitting the cooling unit with a
mounting frame"), the position of the crane
bracket will need to be modified, otherwise
the mounting frame cannot be screw-fas-
tened to the cooling unit.
2
1

Rittal enclosure cooling unit Blue e+ Outdoor 13
4 Transport and handling
EN
Fig. 4: External mounting of the shipping braces
Key
1 Fitted cooling unit
2 Bubble wrap
3 Supporting structure
4 Pallet underneath the cooling unit
Fig. 5: Internal mounting of the shipping braces
Key
1 Fitted cooling unit
2 Bubble wrap
3 Supporting structure
4 Pallet underneath the cooling unit
4
3
2
1
4
3
1
2

5 Installation
EN
14 Rittal enclosure cooling unit Blue e+ Outdoor
5 Installation
5.1 Safety instructions
– Work on electrical systems or equipment may only be
carried out by an electrician or by trained personnel
under the guidance and supervision of an electrician.
All work must be carried out in accordance with elec-
trical engineering regulations.
– The cooling unit may only be connected after the
aforementioned personnel have read this information!
– Use only insulated tools.
– Follow the connection regulations of the appropriate
electrical supply company. Otherwise, there is risk of
injury from electric shock if the connection to the unit
is defective or connected incorrectly in any way.
– The cooling unit must be connected to the mains via
an all-pole disconnecting device to overvoltage cate-
gory III (IEC 61058-1).
– The cooling unit is not de-energised until all of the volt-
age sources have been disconnected!
– Do not assemble and re-activate the device until it is
completely dry.
Please note the maximum weights that may be lifted
by individuals. It may be necessary to use lifting gear.
During assembly, the cooling unit is at risk of dropping
through the mounting cut-out.
Always wear the required personal safety equipment
when working on this device.
Please be sure to observe the applicable regulations
governing electrical installations of the country in
which the device is installed and operated as well as
national regulations for accident prevention. Please
also observe any internal company regulations, such
as work, operating and safety regulations.
The technical specifications and limit values stated
must not be exceeded under any circumstances. In
particular, this applies to the specified ambient tem-
perature range and IP protection category.
5.2 Siting location requirements
When choosing the installation site for the enclosure,
please observe the following:
– The site for the enclosure, and hence the positioning
of the cooling unit, must be carefully selected so as to
ensure good ventilation (distance between cooling
units at least 200 mm, distance from wall see distance
"y" in fig. 6 or tab. 2).
– The cooling unit must be installed and operated with a
maximum deviation of 2° from the vertical.
– The installation site must be free from excessive dirt
and aggressive ambient conditions.
– The maximum humidity (non-condensing) must not
exceed 95%.
– The ambient temperature must not fall below -30 °C/
-22 °F or exceed +60 °C/140 °F.
– It must be possible to fit a condensate water discharge
(see section 5.3.6 "Connect the condensate water
discharge (optional)").
– The mains connection data as stated on the rating
plate of the cooling unit must be guaranteed.
Size of installation room
–Unit SK 3185.330 must not be installed in rooms of
less than 3 m³.
–Units SK 3186330 and SK 3187330 must not be in-
stalled in rooms of less than 6 m³.
–Units SK 3188340 and SK3189340 must not be in-
stalled in rooms of less than 12 m³.
Electromagnetic interference (EMI)
– Interfering electrical installations (high frequency) must
be avoided.
– Signal cables must be laid separately from live cables
(fig. 40).
Designing a suitable enclosure heater
Enclosure heaters are used to prevent the formation of
condensation inside the enclosure, particularly with the
type of fluctuating ambient temperatures that may occur
with outdoor siting or in unheated rooms, and to main-
tain a constant minimum operating temperature (e.g.
when the system is switched off overnight).
Enclosure heaters that regulate relative humidity, pre-
vent temperatures from dropping below the dew point
and stop condensation forming inside the enclosure.
This in turn prevents consequential damages associated
with corrosion and electrical short-circuits.
Rittal recommends you calculate the required enclosure
heater, which should be used in conjunction with a hy-
grostat or enclosure internal thermostat. It is important
to ensure that the enclosure internal temperature does
not drop below -20 °C/-4 °F, because the internal fan
will not operate below that temperature. In such cases,
the error message "Ambient temperature outside" will
appear on the display.
A sample calculation for the Rittal CS Toptec enclosure
series is given below.

Rittal enclosure cooling unit Blue e+ Outdoor 15
5 Installation
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5.3 Assembly procedure
5.3.1 Assembly instructions
Before starting assembly, please ensure that the fol-
lowing tools are available:
– Slotted-head screwdriver
– Open-end spanner SW13
– Torx screwdriver TX25
– Phillips-head screwdriver
Before assembling, please ensure that the enclosure
is sealed on all sides (IP54 or Type 12). Increased con-
densation will occur later during operation if the enclo-
sure is not airtight.
If applicable, additionally fit a door limit switch (such as
4127010) to the enclosure which switches off the
cooling unit when the enclosure door is opened to pre-
vent excessive condensation (see section 3.1.6 "Door
limit switch").
Please ensure that the electronic assemblies in the en-
closure allow the even circulation of air.
Take care to ensure that the cooling unit and its sur-
roundings are dry at the time of installation.
Always have two people to lift the cooling unit, or pref-
erably use lifting gear and an indoor crane. Ensure that
it is secured against toppling over.
Do not rest the cooling unit on the fitted mounting
frame.
Measure the distance "x" (fig. 6) from electronic com-
ponents and other installed equipment inside the en-
closure so that the required air circulation is not
obstructed.
Fig. 6: Air circulation inside the enclosure
Under no circumstances should the air inlet and outlet
openings of the cooling unit be obstructed. Only in this
way is it possible to ensure that the maximum cooling
output is available.
Please ensure that the cold airflow from the cooling
unit is not directed at active components.
Dimensions W x H x D mm
Required thermal output [W] at a minimal ambient temperature
-10 °C/14 °F -20 °C/-4 °F -30 °C/-22 °F
800 x 1200 x 800 350 530 720
800 x 1600 x 800 430 650 880
800 x 1800 x 800 480 810 960
Model No. Dimensions x and y [mm]
SK 3185330 175
SK 3186330, SK 3187330 165
SK 3188340, SK 3189340 225
Tab. 2: Dimensions "x" and "y"
x
y

5 Installation
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16 Rittal enclosure cooling unit Blue e+ Outdoor
Fig. 7: Never direct the cold airflow at active components
(example illustration)
If appropriate, install components to divert the air.
When installing in a dismantled door or side panel,
please ensure that it cannot fall over when installing
the cooling unit in the mounting cut-out.
5.3.2 Mounting options
In principle, the cooling unit is suitable for mounting on
single-walled and twin-walled enclosures. There are two
different options for mounting the cooling unit on an en-
closure door or side panel:
– Fitting without a mounting frame
– Fitting with a mounting frame
Fitting without a mounting frame
When mounted without a mounting frame, the cooling
unit can only be externally mounted on single-walled en-
closure panels. In such cases, the entire cooling unit is
outside the enclosure.
Fig. 8: Fitting without a mounting frame
Fitting with a mounting frame
When fitting with a mounting frame, there are three dif-
ferent mounting types, depending on where the mount-
ing frame is positioned on the cooling unit:
– External mounting: All of the cooling unit is outside the
enclosure.
– Partial internal mounting: Approximately half of the
cooling unit's depth is inside the enclosure, and the
other half is outside.
– Full internal mounting: All of the cooling unit is inside
the enclosure. Only the cover projects to the outside.
Note:
– When mounting unit SK 3185330, the min-
imum dimensions of the enclosure are
600mm x 1200 mm (width x height), both
on the door and on the side panel.
– When mounting units SK 3186330,
SK 3187330, SK 3188340 and
SK 3189340, the minimum dimensions of
the enclosure are 800mm x 1800 mm
(width x height), both on the door and on
the side panel.
Note:
The pictures in this chapter illustrate the in-
stallation of the cooling unit in an enclosure
door. Installation in a side panel is carried out
in the same way.
Assembly is illustrated using unit
SK 3185330 as an example. Variations for
other units are labelled accordingly.

Rittal enclosure cooling unit Blue e+ Outdoor 17
5 Installation
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Fig. 9: Mounting options with a mounting frame
Key
1 External mounting
2 Partial internal mounting
3 Full internal mounting
Your chosen installation option will ultimately depend on
how much space you require inside and outside the en-
closure. The various mounting options have no influence
on the cooling output of the cooling unit, which remains
the same in all cases.
If there are a large number of components installed in-
side the enclosure, external mounting or partial inter-
nal mounting of the cooling unit may be appropriate. In
such cases, the space inside the enclosure may be in-
sufficient for full internal mounting, or it may not be pos-
sible to guarantee adequate cooling of all components
inside the enclosure.
5.3.3 Make a mounting cut-out in the enclosure
Twin-walled enclosure
For mounting on a twin-walled enclosure, the appropri-
ate door or side panel must be purchased from Rittal.
Please contact us to discuss your requirements.
Single-walled enclosure
For mounting on a single-walled enclosure, a suitable
mounting cut-out must be made. The mounting cut-out
is the same for all three mounting options, but differs de-
pending on whether it is fitted with or without a mounting
frame.
Using the diagrams, calculate the required dimensions
for your mounting cut-out.
Drill all the required holes and make the mounting cut-
out.
Carefully deburr all drilled holes and the cut-out to pre-
vent injuries caused by sharp edges.
5.3.4 Fitting the cooling unit without a mounting
frame
Cut the sealing tape provided in the dispatch bag to
the required length so that it can be placed all around
the rear of the cooling unit.
Start by sticking the sealing tape at the bottom edge,
so that the joint between the two ends of the sealing
tape is likewise on the bottom edge of the unit.
Carefully stick the sealing tape onto the rear. Carefully
go round the screw heads on the inside, as this is the
only way to ensure continuous sealing against the en-
closure.
Fig. 10: Laying the seal
Screw the two grub screws into the blind threaded
bushes at the bottom rear of the cooling unit (MA=
5Nm).
1 2 3
Note:
The dimensions of the mounting cut-outs
can be found in sections 12.1 "Mounting cut-
outs on single-walled enclosure panels with-
out a mounting frame" and 12.2 "Mounting
on single- and twin-walled enclosure panels
with a mounting frame".
Caution!
There is a risk of injury on sharp cut-outs
which have not been properly deburred,
especially while mounting the cooling
unit.

5 Installation
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18 Rittal enclosure cooling unit Blue e+ Outdoor
Fig. 11: Tighten the grub screws at the bottom
In the same way, screw two grub screws into the blind
threaded bushes at the top rear of the cooling unit (MA
= 5 Nm).
Fig. 12: Tighten the grub screws at the top
Lift up the cooling unit, preferably from a crane bracket
using suitable lifting gear, and initially set the cooling
unit down with the two bottom grub screws on the
door or side panel of the enclosure.
Fig. 13: Lower the cooling unit into the mounting cut-out
Attach the two corner brackets to the top grub screws
and secure with the corresponding washers and hex
nuts (MA= 5 Nm). Pay particular attention to the cor-
rect orientation of the corner brackets.
Fig. 14: Fit the top corner brackets
Next, attach the two corner brackets to the bottom
grub screws and secure with the corresponding
washers and hex nuts (MA= 5 Nm). Once again, pay
particular attention to the correct orientation of the
corner brackets.
Note:
In the subsequent step, take care to ensure
that the cooling unit is only resting on the
grub screws, never on the sealing tape, oth-
erwise it could become damaged.

Rittal enclosure cooling unit Blue e+ Outdoor 19
5 Installation
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Fig. 15: Fit the bottom corner brackets
For SK 3185330: In the centre, screw two grub
screws into the blind threaded bushes around halfway
up the cooling unit.
Fig. 16: Tighten the central grub screws
For SK 3186330, SK 3187330, SK 3188340,
SK 3189340: In the centre, screw four grub screws
into the blind threaded bushes around halfway up the
cooling unit.
Fig. 17: Tighten the central grub screws
For SK 3185330: Next, attach the two L-shaped
brackets to the grub screws and secure with the cor-
responding washers and hex nuts (MA = 5 Nm). Once
again, pay particular attention to the correct orienta-
tion of the L-shaped brackets.
Fig. 18: Fit the central L-shaped brackets
For SK 3186330, SK 3187330, SK 3188340,
SK 3189340: Next, attach the four L-shaped brackets
to the grub screws and secure with the corresponding
washers and hex nuts (MA= 5 Nm). Once again, pay
particular attention to the correct orientation of the L-
shaped brackets.

5 Installation
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20 Rittal enclosure cooling unit Blue e+ Outdoor
Fig. 19: Fit the central L-shaped brackets
5.3.5 Fitting the cooling unit with a mounting
frame
Please observe the following instructions:
– Full internal mounting of the cooling unit is illustrated
below. External mounting and partial internal mount-
ing are performed in the same way, except that the
mounting frame is positioned differently on the cool-
ing unit.
– Furthermore, for external mounting, the crane
bracket on the cooling unit will need to be moved.
– When mounting on a single-walled enclosure with
mounting frame, screws with an under-head gasket
or blind rivet nuts may be used. Please contact Rittal
if you require further information.
– The attachment points and mounting cut-out are al-
ready provided on the enclosure panel for mounting
on a twin-walled Rittal enclosure with mounting
frame.
– All suitable enclosures with mounting cut-outs can
be found on the Rittal website.
– The customer is responsible for ensuring
appropriate mounting on the enclosure.
The mounting frame is included with the cooling unit
supply. The following positions are possible, depending
on the installation position of the cooling unit.
Fig. 20: Possible positions of the mounting frame
Key
1 Rear position for external mounting
2 Central position for partial internal mounting
3 Front position for full internal mounting
Set the cooling unit down on a suitable surface on its
back, taking care not to damage the unit.
Remove the mounting frame from the packaging and
position it in the required mounting position on the
cooling unit.
Fig. 21: Position the mounting frame
For SK 3185330: Secure the mounting frame in the
desired position using the 16 assembly screws includ-
ed with the supply (MA= .5 Nm).
Note:
Never place the cooling unit on its cover
when fitting the mounting frame.
1 2 3