Rittal SK 3359.xxx, SK 3382.xxx, SK 3273.xxx, SK 3385.xxx, SK 3386.xxx Assembly And Operating Instructions Manual
...
Schaltschrank-Kühlgerät
Cooling unit
Climatiseur
Koelaggregaat
Kylaggregat
Condizionatore per armadi
Refrigerador para armarios
SK 3359.xxx
SK 3273.xxx
SK 3382.xxx
SK 3383.xxx
SK 3384.xxx
SK 3385.xxx
SK 3386.xxx
SK 3387.xxx
Montage-, Installations- und Bedienungsanleitung
Assembly and operating instructions
Manuel d’installation et de maintenance
Montage- en bedieningshandleiding
Montage- och hanteringsanvisning
Istruzioni di montaggio e funzionamento
Instrucciones de montaje
Rittal cooling unit assembly and operating instructions 3
EN
Contents
1 Notes on documentation. . . . . . . . . . 4
1.1 Associated documents. . . . . . . . . . . . . . . . 4
1.2 CE labelling . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Retention of documents. . . . . . . . . . . . . . . 4
1.4 Symbols used . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety notes . . . . . . . . . . . . . . . . . . . . 4
3 Device description . . . . . . . . . . . . . . . 5
3.1 Functional description . . . . . . . . . . . . . . . . 5
3.1.1 How it works . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.2 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.3 Bus mode (e-Comfort controller only). . . . . . 5
3.1.4 Safety equipment . . . . . . . . . . . . . . . . . . . . . 6
3.1.5 Condensation . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.6 Filter mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.7 Door limit switch . . . . . . . . . . . . . . . . . . . . . . 6
3.1.8 Additional interface X3 . . . . . . . . . . . . . . . . . 7
3.2 Proper usage. . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Scope of supply . . . . . . . . . . . . . . . . . . . . . 7
4 Assembly and connection . . . . . . . . 7
4.1 Choosing the installation site . . . . . . . . . . 7
4.2 Assembly instructions . . . . . . . . . . . . . . . . 7
4.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2.2 Layout of the electronic components
in the enclosure . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Fitting the cooling unit . . . . . . . . . . . . . . . . 8
4.3.1 Cutting out on the enclosure. . . . . . . . . . . . . 9
4.3.2 Top mounting of the cooling unit . . . . . . . . . 9
4.4 Connecting the condensate discharge. . 10
4.5 Notes on electrical installation . . . . . . . . 10
4.5.1 Connection data . . . . . . . . . . . . . . . . . . . . . 10
4.5.2
Overvoltage protection
and supply line load
. . . . . . . . . . . . . . . . . . 10
4.5.3 Three-phase devices . . . . . . . . . . . . . . . . . 11
4.5.4 Door limit switch . . . . . . . . . . . . . . . . . . . . . 11
4.5.5 Notes on the flicker standard . . . . . . . . . . . 11
4.5.6 Potential equalisation . . . . . . . . . . . . . . . . . 11
4.6 Carrying out the electrical installation . . 11
4.6.1 Bus connection
(only in conjunction with several units
with an e-Comfort controller) . . . . . . . . . . . 11
4.6.2 Connection X3 for serial interface. . . . . . . . 11
4.6.3 Installing the power supply. . . . . . . . . . . . . 13
4.7 Finalising assembly . . . . . . . . . . . . . . . . . 15
4.7.1 Installing the filter media . . . . . . . . . . . . . . . 15
4.7.2 Fitting the cooling unit. . . . . . . . . . . . . . . . . 15
4.7.3 Setting the filter mat monitor. . . . . . . . . . . . 15
5 Commissioning . . . . . . . . . . . . . . . . 15
6 Operation . . . . . . . . . . . . . . . . . . . . . 16
6.1 Control using the e-Comfort controller . 16
6.1.1 Properties. . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.2 Eco-mode. . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.3 Launching test mode . . . . . . . . . . . . . . . . . 17
6.1.4 General programming information . . . . . . . 17
6.1.5 Variable parameters. . . . . . . . . . . . . . . . . . 18
6.1.6 Programming overview . . . . . . . . . . . . . . . 19
6.1.7 Defining system messages
for evaluation . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.8 Setting the master-slave identifier . . . . . . . 21
6.1.9 Evaluating system messages. . . . . . . . . . . 21
6.1.10 Resetting the e-Comfort controller . . . . . . . 23
7 Inspection and maintenance. . . . . . 23
7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.1 Compressed air cleaning. . . . . . . . . . . . . . 23
8 Storage and disposal. . . . . . . . . . . . 25
9 Technical specifications . . . . . . . . . 26
10 List of spare parts . . . . . . . . . . . . . . 29
11 Appendix:
Cut-out and hole sizes. . . . . . . . . . . 31
11.1 Dimensions for assembly . . . . . . . . . . . . 31
4 Rittal cooling unit assembly and operating instructions
1 Notes on documentation
EN
1 Notes on documentation
These assembly instructions are aimed at tradespersons who are familiar with assembly and installation
of the cooling unit, and at trained specialists who are
familiar with operation of the cooling unit.
1.1 Associated documents
There are two sets of instructions for the unit types
described here:
– Assembly and installation instructions enclosed
with the unit in the form of a paper document
– Assembly, installation and operating instructions
enclosed with the unit in the form of a PDF file
(Adobe Acrobat) on CD-ROM.
We cannot accept any liability for damage associated with failure to observe these instructions.
Where applicable, the instructions for any accessories used also apply.
1.2 CE labelling
The declaration of conformity is supplied with the unit
as a separate document.
1.3 Retention of documents
These instructions and all associated documents
constitute an integral part of the product. They must
be given to the plant operator. The plant operator is
responsible for storage of the documents so they are
readily available when needed.
1.4 Symbols used
Please observe the following safety instructions and
other notes in this guide:
Symbol for an instructed action:
• The bullet point indicates that you should perform
an action.
Safety and other instructions:
2 Safety notes
Please observe the following general safety instructions when assembling and operating the unit:
– Assembly, installation and servicing may only be
performed by properly trained specialists.
– Do not obstruct the air inlet and air outlet of the
cooling unit inside and outside the enclosure
(see also section 4.2.2).
– The heat loss of the components installed in the
enclosure must not exceed the specific useful
cooling output of the cooling unit.
– The cooling unit must always be transported in a
vertical position.
– Use only original spare parts and accessories.
– Do not make any changes to the cooling unit other
than those described in these instructions or asso-
ciated instructions.
– Risk of burn injuries! For cooling units with auto-
matic condensate evaporation, the surface of the
thermal element will get very hot during operation,
and will remain so for some time afterwards.
– The mains connector of the cooling unit must only
be connected and disconnected with the system
de-energised. Connect the pre-fuse specified on
the rating plate.
Danger!
Immediate danger to life and limb!
Caution!
Potential threat to the product
and its environment.
Note:
Useful information
and special features.
3 Device description
Rittal cooling unit assembly and operating instructions 5
EN
3 Device description
Depending on the model chosen, your cooling unit
may vary in appearance from the illustrations contained in these instructions. However, the functions
are identical in principle.
Fig. 1: Unit description
Legend
1Enclosure
2 Air outlet holes
3 Rating plate
4 Louvred grille for air inlet
5 Display
6 X2 master-slave connection (underside of the unit)
7 X1 terminal strip (underside of the unit)
8 X3 optional serial interface (underside of the unit)
9 Dispatch bag
10 Twin-threaded bolt
11 Condenser
12 Condensate discharge
3.1 Functional description
Enclosure cooling units are designed to dissipate
heat from enclosures by cooling the air inside the
enclosure and so protect the temperature-sensitive
components. It is mounted on the roof of an enclosure.
3.1.1 How it works
The cooling unit (compression refrigeration system)
is comprised of four main components (cf. Fig. 2):
the evaporator (1), the coolant compressor (2), the
condenser (3), and the control or expansion valve
(4), which are connected by suitable pipework.
This circuit is filled with a readily boiling substance,
the refrigerant. Coolant R134a (CH
2
FCF3) is chlorinefree. Its ozone destruction potential is 0, making it
very eco-friendly. A filter dryer (5) which is integrated
into the hermetically sealed cooling circuit provides
effective protection against moisture, acid, dirt particles, and foreign bodies within the cooling circuit.
Fig. 2: Cooling circuit
In the evaporator coil (1), the liquid coolant is converted to a gaseous state. The energy needed for
this purpose is taken from the enclosure air in the
form of heat, which has the effect of cooling the
enclosure air. In the compressor (2), the coolant is
heavily compressed, so that it achieves a higher
temperature inside the condenser (3) than the ambient air. This means that excess heat may be emitted
to the ambient air via the surface of the condenser,
as a result of which the temperature of the coolant
drops and it is converted back into liquid. It is
re-injected into the evaporator coil via a thermostatic
expansion valve (4), which causes it to cool down
further, and is then once again able to absorb the
energy from the enclosure air in the evaporator coil.
The whole cycle begins again.
3.1.2 Controller
Rittal enclosure cooling units are fitted with a controller for setting the functions of the cooling unit
(display plus extended functions, see chapter
“6 Operation”, page 16).
3.1.3 Bus mode (e-Comfort controller only)
The serial unit interface X2 allows you to create a bus
connection with up to ten cooling units using the
master-slave cable (shielded, four-wire cable, Model
No. SK 3124.100). This allows you to implement the
following functions:
– Parallel unit control (the cooling units in the network
can be switched on and off simultaneously)
– Parallel door status message (“door open”)
– Parallel collective fault message
3
6, 7, 8
12
4
11
10
9
5
2
1
PSA
H
pressure-
operated
switch
Condenser fan
Expansion valve (4)
Temperature
control
Filter dryer (5)
Internal circuit
Compressor
(2)
External circuit
Evaporator fan
Evaporator coil (1)
Condenser (3)
6 Rittal cooling unit assembly and operating instructions
3 Device description
EN
Data is exchanged via the master-slave connection.
During commissioning, assign an address to each
unit that also includes the identifier “master” or
“slave”.
3.1.4 Safety equipment
– In the cooling cycle, the cooling unit has a tested
pressure-operated switch to EN 12 263 which is
set to maximum PS (admissible pressure); this
operates via an automatic reset device whenever
the pressure drops again.
– Temperature monitoring prevents the evaporator
coil from icing over. If there is a risk of icing, the
compressor switches itself off and automatically
switches itself back on again at higher temperatures.
– The refrigerant compressor and the fans are
equipped with thermal winding shields to protect
against excess current and excess temperatures.
– 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 seconds.
– The device has floating contacts on the connection
pins (terminals 3 – 5), via which system messages
from the device may be polled, e.g. using a PLC
(2x normally open contacts e-Comfort controller).
3.1.5 Condensation
At high levels of humidity and low temperatures inside the enclosure, condensation may form on the
evaporator coil.
The cooling units have an automatic electrical condensate evaporator. The thermal component used
for this purpose is based on self-regulating PTC
technology. Condensate arising on the evaporator
coil is collected in a tank in the internal circuit of the
cooling unit. When the water level rises, the water
enters the PTC thermal component and is evaporated (through-flow heater principle). The water
vapour streams out of the cooling unit with the airflow
from the external fan.
The PTC thermal component is permanently connected and has no switchpoint. It is protected
against short-circuits with miniature fuses (F1.1,
F1.2). If the fuse has tripped, any condensation is
drained off via the safety overflow.
In the case of a malfunction or a failure in the thermal
component, the condensation water is routed out of
the unit via a drain pipe at the side or rear for safety
reasons. For this purpose, a hose must be connected to the condensate nozzle (see “4.4 Connecting
the condensate discharge”, page 10). Condensate
hoses are available as accessories (refer also to the
accessories section in the Rittal Catalogue).
3.1.6 Filter mats
The cooling unit condenser is finished all over with a
dirt-repelling, easy-to-clean RiNano coating. In many
cases, therefore, the use of filter media is unnecessary, particularly in the case of dry dusts.
For coarse dust and lint in the enclosure air, we
recommend installing an additional PU foam filter
mat (available as an accessory) in the cooling unit.
Depending on the incidence of dust, you will need
to replace the filter from time to time.
For air containing oil condensation, we recommend
the use of metal filters (also available as an accessory). These may be cleaned with suitable detergents
and reused. When used in textile plants with heavy
lint contamination, lint screens should be used (available as an optional extra).
Function of the filter mat monitor:
Dirt on the filter mat is automatically determined by
measuring the temperature difference in the external
circuit of the cooling unit. As the level of filter mat
soiling rises, the temperature difference will increase.
The nominal value of the temperature difference in
the external circuit adapts automatically to the relevant operating points in the performance diagrams.
Hence there is no need to readjust the nominal value
for different operating points of the cooling unit.
3.1.7 Door limit switch
The cooling unit may be operated with a floating door
limit switch connected. The door limit switch is not included with the supply (available as an accessory,
Model No. PS 4127.0
10)
.
The
door limit switch function causes the fans and
the compressor in the cooling unit to be switched off
after approximately 15 seconds when the enclosure
door is opened (contacts 1 and 2 closed). This prevents the formation of condensation 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 cuts back in with a
delay of approximately 15 seconds after the door
has been closed, while the condenser fan and compressor switch on after approximately 3 minutes.
Note:
No external voltage must be applied to
the door contacts (terminals 1 and 2).
4 Assembly and connection
Rittal cooling unit assembly and operating instructions 7
EN
3.1.8 Additional interface X3
An additional interface card may be connected to
the 9-pole SUB-D connector X3 in order to incorporate the cooling unit into higher-level monitoring
systems (available as an accessory, interface card
Model No. SK 3124.200).
3.2 Proper usage
Rittal enclosure cooling units were developed and
designed in accordance with the state-of-the-art and
the recognised rules governing technical safety.
Nevertheless, if used improperly, they may pose a
threat to life and limb or cause damage to property.
The unit is only intended for cooling enclosures. Any
other use is deemed improper. The manufacturer will
not be liable for any damages caused as a result of
improper use, or for incorrect assembly, installation
or use. All risk is borne solely by the user.
Proper usage also includes the observation of all
valid documents and compliance with the inspection
and servicing conditions.
3.3 Scope of supply
The unit is supplied in a packaging unit in a fully
assembled state.
Please check the delivery for completeness:
Tab. 1: Scope of supply
4 Assembly and connection
4.1 Choosing the installation site
When choosing the installation site for the enclosure,
please observe the following:
– The site for the enclosure, and hence the arrange-
ment of the cooling unit, must be carefully selected
so as to ensure good ventilation. Depending on the
siting of the unit, if several units are installed direct-
ly adjacent to one another, the distance from the
wall must be at least 200 mm.
– The cooling unit must be installed and operated in
a vertical position (maximum deviation: 2°).
– The site must be free from excessive dirt and
moisture.
– The ambient temperature must not exceed 55°C.
– It must be possible to fit a condensate discharge
(see “4.4 Connecting the condensate discharge”,
page 10).
– The mains connection data as stated on the rating
plate of the unit must be guaranteed.
4.2 Assembly instructions
4.2.1 General
– Check the packaging carefully for signs of damage.
Traces of oil on damaged packaging are an indi-
cation of refrigerant loss and leakages. Packaging
damage may be the cause of a subsequent func-
tional failure.
– The enclosure must be sealed on all sides (IP 54).
Increased condensation will occur if the enclosure
is not airtight.
– In order to avoid excessive condensation inside
the enclosure, we recommend installing a door
limit switch (e.g. PS 4127.0
10) which deactivates
the cooling unit when the enclosure door is opened
(see “3.1.7 Door limit switch”, page 6).
Note:
The electrical signals at the interface are
of an extra-low voltage (not extra-low safety
voltages to EN 60 335).
Qty. Description
1 Enclosure cooling unit
1
1
1
1
1
1
1
1
Dispatch bag:
– Sealing plate (SK 3273.xxx, SK 3383.xxx
to SK 3387.xxx)
– Sealing frame
– Plug-in terminal strip
– Assembly and installation instructions
– Assembly, installation and operating
instructions on CD-ROM
– Declaration of conformity
– Safety notes
1 Drilling template
8 Rittal cooling unit assembly and operating instructions
4 Assembly and connection
EN
4.2.2 Layout of the electronic components
in the enclosure
Fig. 3: Never direct the cold airflow at active components
Exercise particular caution with the airflow from the
blowers of built-in electronic components (cf. Fig. 3).
Components for targeted air routing are available as
accessories – please refer to the Rittal Catalogue.
Fig. 4: Targeted air routing inside the enclosure
Fig. 5: Cover bungs
4.3 Fitting the cooling unit
The enclosure cooling unit is mounted on top of the
enclosure roof:
To this end, the roof plate must be cut out as per the
drilling template included with the supply.
Caution!
Risk of condensation!
When arranging the components inside
the enclosure, please ensure that the
cold airflow from the cooling unit is not
directed at active components. Please
also ensure that the cold airflow is not
directed at the warm exhaust airflow
from active components such as converters. This may lead to an air shortcircuit and therefore prevent adequate
climate control, or may even cause the
cooling unit’s internal safety devices to
cease cooling operation.
Note:
When using an air duct system, care must
be taken to ensure that it is laid straight and
without kinks wherever possible. This minimises the resistance to the cold airflow.
It is important to ensure even air circulation
inside the enclosure. Under no circumstances should air inlet and outlet openings
be obstructed, otherwise the cooling performance of the unit will be reduced. Ensure
a suitable distance from electronic components and other installed enclosures so that
the required air circulation is not obstructed
and prevented.
One cold air outlet from the cooling unit
must be kept open at all times when
operating with the air duct, to prevent the
accumulation of cold air inside the unit.
Note:
When using the cover bungs, only a maximum of 1 or 2 cold air outlet openings may
be sealed, depending on the unit type.
Note:
Pre-configured, reinforced roof plates
with cut-outs to match your enclosure are
available as accessories; refer to the
Rittal Catalogue.
SK 3273.xxx
SK 3383.xxx
SK 3384.xxx
SK 3385.xxx
SK 3359.xxx
SK 3382.xxx
SK 3386.xxx
SK 3387.xxx
max. 2x max. 1x
4 Assembly and connection
Rittal cooling unit assembly and operating instructions 9
EN
4.3.1 Cutting out on the enclosure
• Stick the supplied drilling template onto the roof of
the enclosure using adhesive tape.
There are dimensioning lines on the drilling template
to suit the installation type for your cooling unit.
• Make the cut-outs including the line width as per
the drilling template.
Deburr the cut-outs.
4.3.2 Top mounting of the cooling unit
• Stick the supplied sealing frame onto the cut-out
roof plate.
Fig. 6: Sealing frame on roof plate
• Stick the supplied sealing plate underneath
the plastic base of the cooling unit (SK 3273.xxx,
SK 3383.xxx to SK 3387.xxx).
Fig. 7: Sealing plate underneath the plastic base
of the cooling unit
• Mount the cooling unit on the enclosure roof.
• Screw the supplied twin-threaded bolts into the
core holes in the plastic base on the underside
of the cooling unit with a maximum of 5 Nm.
• Secure the unit using the supplied washers and
nuts.
Fig. 8: Roof plate reinforcement for the TS 8 enclosure
Accessories for roof plate reinforcement with TS:
Punched rail
U nut
Fastening bracket
Threaded block
(refer also to Accessories in the Rittal Catalogue)
Risk of injury!
Carefully deburr all cut-outs to prevent
injuries caused by sharp edges.
Note:
In order to achieve a permanent seal between the cooling unit and the enclosure,
the mounting surface should be reinforced
or supported if necessary. This is particularly applicable with large roof areas.
10 Rittal cooling unit assembly and operating instructions
4 Assembly and connection
EN
4.4 Connecting the condensate discharge
A condensate discharge hose (Ø1/2˝) may be fitted
onto the cooling unit.
The condensate discharge
– must be laid with a suitable and constant gradient
(no siphoning)
– must be laid without kinks
– must not have a reduced cross-section if extended.
The condensate hose is available as an accessory
(refer also to Accessories in the Rittal Catalogue).
Fig. 9: Connecting the condensate discharge
• Connect a suitable hose to one of the two conden-
sate nozzles and secure using a hose clip.
The unused condensate nozzle should be sealed
accordingly.
• Lay the condensate hose, e.g. into a drain.
Fig. 10: Lay the condensate discharge
4.5 Notes on electrical installation
When performing the electrical installation, it is important to observe all valid national and regional
regulations as well as the provisions of the responsible power supply company. Electrical installation
must only be carried out by a qualified electrician
who is responsible for compliance with the existing
standards and regulations.
4.5.1 Connection data
– The connected voltage and frequency must corre-
spond to the values stated on the rating plate.
– The cooling unit must be connected to the mains
via an all-pin isolating device, which ensures at
least 3 mm contact opening when switched off.
– No additional temperature control may be connec-
ted upstream of the unit at the supply end.
– Install the pre-fuse specified on the rating plate
to protect the cable and equipment from shortcircuits.
– The mains connection must ensure low-noise
potential equalisation.
4.5.2 Overvoltage protection
and supply line load
– The unit does not have its own overvoltage protec-
tion. Measures must be taken by the operator at
the supply end to ensure effective lightning and
overvoltage protection. The mains voltage must
not exceed a tolerance of ±10%.
– In accordance with IEC 61 000-3-11, the unit is
intended solely for use at sites with a continuous
current-carrying capacity (incoming mains power
supply) of more than 100 A per phase and with a
supply voltage of 400/230 V. If necessary, the
power supply company must be consulted to ensure that the continuous current-carrying capacity
at the point of connection to the public grid is
sufficient for connection of such a unit.
– The fans and compressors in single- and three-
phase units are intrinsically safe (thermal winding
protection). The same also applies to all transformer versions and to special-voltage units which are
likewise equipped with a transformer.
– Install the slow pre-fuse specified on the rating
plate (miniature circuit-breaker with appropriate
characteristic – e. g. K characteristic – or fuse gG
standard type, power circuit-breaker or transformer circuit-breaker) to protect the cable and
equipment from short-circuits. Select a suitable
motor circuit-breaker in accordance with the information specified on the rating plate: Set it to the
minimum specified value. This will achieve the best
short-circuit protection for cables and equipment.
Example: Specified setting range 6.3 – 10 A; set
to 6.3 A.
1
/2˝
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