ABB SCC-U User manual

—
ABB MEASUREMENT & ANALYTICS |
OPERATING INSTRUCTION | OI/SCC-U-EN REV. B
SCC
-U
Utility unit
—
ABB Measurement & Analytics
For your local ABB contact, visit:
www.abb.com/contacts
For more product information, visit:
www.abb.com/analytical
Measurement made easy
OI/SCC
-U-EN Rev. B 05.2023
—
SCC
-U
Introduction
•
Power supply and control unit for use in small
extractive gas analyzer systems
•
Power distribution for gas analyzers, gas
sampling devices, heated sample probe filter
units, heated sample gas lines
•
Temperature controllers for heated sample
gas line and heated sample probe filter
(optional)
•
Solenoid valves for control of automatic
calibration with test gases (optional)
Additional information
Additional documentation on
SCC-U is available for
download free of charge at www.abb.com/
analytical.
Alternatively simply scan this code:
—
We reserve the right to make technical changes or modify the contents of this
document without prior notice. With regard to purchase orders, the agreed
particulars
shall prevail.
ABB does not accept any responsibility whatsoever for potential errors or possible lack
of information in this document.
We reserve all rights in this document and in the subject matter and illustrations
contained therein. An
y reproduction, disclosure to third parties or utilization of its
contents
– in whole or in parts – is forbidden without prior written consent of ABB.
© ABB 2023 3KXG171204R4201

2 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
Table of contents
1Safety.......................................................................... 3
General information and instructions.................................. 3
Warnings.................................................................................... 3
Intended use .............................................................................4
Improper use.............................................................................4
Safety instructions...................................................................4
Requirements for safe operation.....................................4
Special information and precautions ..............................4
National regulations ...........................................................4
Device safety and safe operation.....................................4
Warranty provisions.................................................................5
Manufacturer’s address ..........................................................5
Service address.........................................................................5
2Design and function ..................................................6
Overview ....................................................................................6
Front view .............................................................................6
Rear view...............................................................................6
Pneumatic diagrams................................................................ 7
3Product identification ..............................................8
Name plate ................................................................................8
Plates and symbols ..................................................................8
Scope of delivery ......................................................................8
4Transport and storage..............................................9
Inspection..................................................................................9
Transporting the device..........................................................9
Storing the device ....................................................................9
Ambient conditions ............................................................9
Packaging ..................................................................................9
Returning devices.....................................................................9
5Installation ...............................................................10
Requirements for the installation site ...............................10
Ambient conditions ...............................................................10
Construction ...........................................................................10
Mounting .................................................................................10
Installation in a 19 in cabinet / rack...............................10
Gas connections..................................................................... 11
Sample gas inlet conditions............................................ 11
Gas connections ................................................................ 11
Connecting the gas lines ................................................. 11
Electrical connections ........................................................... 12
Safety instructions for electrical installation............... 12
Connection on the device ................................................ 13
Electrical Data ....................................................................14
Safety .......................................................................................14
Connecting the Pt100 temperature sensors (option) 15
Connecting the control and status signals .................. 15
Connecting the power supply of the external devices15
Connecting the utility unit to the power supply.......... 15
6Commissioning and operation...............................16
Safety instructions for operation....................................... 16
Checks prior to commissioning .......................................... 16
Starting-up the utility unit ................................................... 16
7Diagnosis / Troubleshooting .................................17
Malfunctions............................................................................17
8Maintenance / Repair ..............................................18
Safety instructions ................................................................ 18
Spare parts ............................................................................. 18
Cleaning................................................................................... 18
Checking gas path seal integrity ........................................ 18
9Dismounting and disposal......................................19
Dismounting........................................................................... 19
Shutting down the utility unit ........................................ 19
Disposal ................................................................................... 19
10 Specification ........................................................... 20
11 Additional documents............................................ 20
12 Appendix ...................................................................21
Return form..............................................................................21
Technical drawings................................................................ 22
Dimensions ........................................................................ 22
Internal construction........................................................ 24
Pneumatic diagram .......................................................... 25
Wiring diagram.................................................................. 26

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 3
1Safety
General information and instructions
These instructions are an important part of the product and
must be retained for future reference.
Installation, commissioning, and maintenance of the product
may only be performed by trained specialist personnel who have
been authorized by the plant operator accordingly. The specialist
personnel must have read and understood the manual and must
comply with its instructions.
For additional information or if specific problems occur that are
not discussed in these instructions, contact the manufacturer.
The content of these instructions is neither part of nor an
amendment to any previous or existing agreement, promise or
legal relationship.
Modifications and repairs to the product may only be performed
if expressly permitted by these instructions.
Information and symbols on the product must be observed.
These may not be removed and must be fully legible at all times.
The operating company must strictly observe the applicable
national regulations relating to the installation, function testing,
repair and maintenance of electrical products.
Warnings
The warnings in these instructions are structured as follows:
DANGER
The signal word ‘DANGER’ indicates an imminent danger.
Failure to observe this information will result in death or
severe injury.
WARNING
The signal word ‘WARNING’ indicates an imminent danger.
Failure to observe this information may result in death or
severe injury.
CAUTION
The signal word ‘CAUTION’ indicates an imminent danger.
Failure to observe this information may result in minor or
moderate injury.
NOTICE
The signal word ‘NOTICE’ indicates possible material damage.
Note
‘Note’ indicates useful or important information about the
product.

4 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
… 1 Safety
Intended use
The SCC-U utility unit is designed for:
• Power supply for system components such as gas
analyzer, sample gas cooler and sample gas feed unit,
• Temperature control for heated sample gas line and
heated filter unit (optional),
• Test gas switching for automatic adjustment (optional).
Any other use is not as specified.
The specified use also includes taking note of this operating
instruction.
Improper use
The SCC-U utility unit must not be used in a potentially explosive
atmosphere or in hazardous areas.
Safety instructions
Requirements for safe operation
In order to operate in a safe and efficient manner the device
should be properly handled and stored, correctly installed and
set-up, properly operated and correctly maintained.
Special information and precautions
These include:
• The content of this operating instruction,
• The safety information affixed to the device,
• The applicable safety precautions for installing and
operating electrical devices,
• Safety precautions for working with gases, acids,
condensates, etc.
National regulations
The regulations, standards and guidelines cited in this
operator's manual are applicable in the Federal Republic of
Germany. The applicable national regulations should be followed
when the device is used in other countries.
Device safety and safe operation
The device is designed and tested in accordance with the
relevant safety standards and has been shipped ready for safe
operation.
To maintain this condition and to assure safe operation, read
and follow the safety infor-mation in this operator's manual.
Failure to do so can put persons at risk and can lead to device
damage as well as damage to other systems and devices.

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 5
Warranty provisions
Using the device in a manner that does not fall within the scope
of its intended use, disregarding this manual, using
underqualified personnel, or making unauthorized alterations
releases the manufacturer from liability for any resulting
damage. This renders the manufacturer's warranty null and void.
Manufacturer’s address
ABB AG
Measurement & Analytics
Stierstädter Str. 5
60488 Frankfurt am Main
Germany
Tel: [phone]
Email: [email protected]
Service address
If the information in this Operating Instruction does not cover a
particular situation, ABB Service will be pleased to supply
additional information as required.
Please contact your local service representative.
To find your local ABB contact visit:
www.abb.com/contacts
For more information visit:
www.abb.com/measurement

6 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
2Design and function
Overview
Front view
1
Heated filter unit temperature controller (option)
2
Heated sample gas line temperature controller (option)
3
Main switch
4
Heated filter unit circuit breaker (6 A)
5
Heated sample gas line residual current breaker with overcurrent
protection (16 A / 0.03 A)
6
External power sockets and 24 VDC power supply circuit breaker (10 A)
Figure 1: SCC-U front view
Rear view
1
Electrical power connections
2
Name plate
3
Electrical connections for Pt100 of heated filter unit and heated sample
gas line
4
SUB-D connector for control and status signals
5
Sample gas connections
6
Ground terminal
Figure 2: SCC-U rear view
F00227
1 2 3 64 5
F00228
1 3 4
5
6
2

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 7
Pneumatic diagrams
See also Internal construction on page 24.
Catalog no. 23940-0-1100011X000
Version with 1 solenoid valve for switching ambient air for
calibration using calibration cells.
A
To sample gas cooler
B
Sample gas inlet
Figure 3: Pneumatic diagram
Catalog no. 23940-0-1100012X000
Version with 3 + 1 solenoid valves for switching up to three test
gases for calibration with test gas feeding at sample gas cooler.
A
To sample gas cooler
B
Test gas 3
C
Test gas 2
D
Test gas 1
B
Sample gas inlet
Figure 4: Pneumatic diagram
Catalog no. 23940-0-1100013X000
Version with 3 + 1 solenoid valves for switching up to three test
gases and ambient air for calibration with test gas feeding at
gas sampling probe.
A
To sample gas cooler
B
To sample probe
C
Test gas 3
D
Test gas 2
E
Test gas 1
F
Sample gas inlet
Figure 5: Pneumatic diagram

8 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
3Product identification
Name plate
Note
The name plates displayed are examples. The device
identification plates affixed to the device can differ from this
representation.
1
Manufacturer, manufacturer
address
2
Type designation
3
Nominal voltage
4
Frequency
5
Maximum current
6
Medium temperature*
7
Medium pressure*
8
Test gas pressure*
9
Order number
0
Type code
k
Serial number
* See analyzer data sheet
Figure 6: Name plate (example)
Plates and symbols
The following labels and symbols are attached to the analyzer
system or to the individual components.
Label / Symbol
Meaning
Consult documentation, i.e. consult this
operating instruction.
Risk of electric shock!
Scope of delivery
Quantity
Description
1
SCC-U utility unit with power supply cable, length 3 m
1 to 4
Power supply cables (as per order), length 2 m
1
Plug for connecting the power supply cable of the heated filter
unit (as per order)
1
Plug for connecting the power supply cable of the heated
sample gas line (as per order)
1
Sub-D plug, 15-pole, with connected signal lines, length 2 m
1
PTFE tube, 6/4 x 1, length 3 m
1
Operating instruction
1
Drawings set

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 9
4Transport and storage
Inspection
Check the devices immediately after unpacking for possible
damage that may have occurred from improper transport.
Details of any damage that has occurred in transit must be
recorded on the transport documents.
All claims for damages must be submitted to the shipper
without delay and before installation.
Transporting the device
Observe the following instructions:
• Do not expose the device to humidity during transport.
Pack the device accordingly.
• Pack the device so that it is protected against vibrations
during transport, for example, by using air-cushioned
packing.
Storing the device
Bear the following points in mind when storing devices:
• Store the device in its original packaging in a dry and
dust-free location.
• Observe the permitted ambient conditions for transport
and storage.
• Avoid storing the device in direct sunlight.
• In principle, the devices may be stored for an unlimited
period. However, the warranty conditions stipulated in
the order confirmation of the supplier apply.
Ambient conditions
Refer to Ambient conditions on page 10.
Packaging
1. If the original packing material is no longer available, wrap
the device in bubble foil or corrugated cardboard.
When shipping overseas, also heat-seal the device air-tight in
0.2 mm thick polyethylene, including a desiccant (e.g. silica
gel). The amount of desiccant used should be adequate for
the package volume and the probable shipping time (at least
3 months).
2. Pack the device in an adequately large box lined with shock
absorbent material (e.g. foam material). The thickness of the
cushioning material should be adequate for the weight of the
device and the mode of shipping. The box should also be
lined with a double layer of bitumen paper for overseas
shipping.
3. Mark the box ‘Fragile! Handle with care!’.
Returning devices
Use the original packaging or a secure transport container of an
appropriate type if you need to return the device for repair or
recalibration purposes.
Fill out the return form (see Return form on page 21) and include
this with the device.
In accordance with the EU Directive governing hazardous
materials, the owner of hazardous waste is responsible for its
disposal or must observe the following regulations for shipping
purposes:
All devices delivered to ABB must be free from any hazardous
materials (acids, alkalis, solvents, etc.).
Address for the return:
ABB AG
Service Analysentechnik – Parts & Repair
Stierstädter Straße 5
60488 Frankfurt
Germany
Fax: [phone]
Email: repair-[email protected]

10 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
5Installation
Requirements for the installation site
Installation location
The environmental conditions should be observed (see Ambient
conditions).
The device should be installed near the gas analyzer and the
other connected devices.
The length of the delivered power supply cables is 2 meters.
Adequate air circulation
• Ensure adequate natural air circulation around the device.
• Avoid heat buildup.
Protection against adverse environmental conditions
The utility unit should be protected from:
• Cold
• Radiated heat, e.g. from the sun, kilns or boilers
• Temperature fluctuations
• Strong air movement
• Dust deposits and dust penetration
• Corrosive atmosphere
• Vibration
Ambient conditions
Ambient temperature
• Operation: 10 to 40 °C
• Storage and transport: −25 to 60 °C
Relative humidity
≤75 % annual average
Installation location
• Indoors only
• Installation in general purpose environment only.
Construction
Design
19 in housing (3 height units)
Mounting
Rack mounting on mounting rails.
The gas and electrical con-nections are located on the rear
side of the housing.
Consider the distances from the wall during installation:
• Left- and right-hand side panels at least 35 mm,
• Rear panel at least 200 mm.
• A distance of at least 1 height unit from devices which
develop heat is required.
Housing material and color
Aluminum, front panel light gray (RAL 7035)
IP protection of housing
IP 20 according to EN 60529
Dimensions
See Dimensions on page 22.
Weight
Approx. 10 kg
Mounting
Installation in a 19 in cabinet / rack
1. If necessary, install mounting rails in the cabinet / rack.
2. Mount the utility unit in a 19 in cabinet / rack using 4 × M6
screws (not supplied).

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 11
Gas connections
1
Outlet to sample gas cooler (standard)
2
Sample gas inlet (standard)
3
Outlet to gas sampling probe (option)
4
Test gas inlet 1 (option)
5
Test gas inlet 2 (option)
6
Test gas inlet 3 (option)
Figure 7: Gas connections on the rear panel
Sample gas inlet conditions
The sample gas must be non-corrosive, non-flammable and non-
toxic. The utility unit has one gas path.
Sample gas pressure
pabs = 70 to 105 kPa (0.7 to 1.05 bar)
Test gas pressure
pabs ≤200 kPa (2 bar)
Note
If gas pressures > 250 kPa are expected, a suitable external
pressure reducer must be connected upstream.
Sample gas flow rate
• 70 l/h with SCC-S
• 100 l/h with SCC-C and SCC-F
Sample gas inlet temperature
10 to 50 °C
Note
The relevant data in the gas analyzer data sheets must be
considered as well for the sample handling components.
Gas connections
The gas connections are PVDF fittings for DN 4 / 6 mm tube.
Connecting the gas lines
• Use gas lines made from material that is suited to the
measuring task.
• Connect the gas lines to the gas inlet and outlet fittings on
the rear panel.
F00233
1
42 5 6 7

12 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
… 5 Installation
Electrical connections
Safety instructions for electrical installation
WARNING
Risk of injury due to live parts.
Improper work on the electrical connections can result in
electric shock.
• Connect the device only with the power supply switched
off.
• Observe the applicable standards and regulations for the
electrical connection.
Note
Route the signal lines separately from the power supply lines.
Note
Observe the current rating of the connected devices.
• Maximum current 16 A!
Protective lead connection
The protective lead (ground) should be attached to the
protective lead connector before any other connection is made.
Risks of a disconnected protective lead
The device can be hazardous if the protective lead is interrupted
inside or outside the device or if the protective lead is
disconnected.
Risks involved in opening the covers
Current-bearing components can be exposed when the covers or
parts are removed, even if this can be done without tools.
Current can be present at some connection points.
Risks involved in working with an open device
All work on a device that is open and connected to power should
only be performed by trained personnel who are familiar with the
risks involved.

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 13
Connection on the device
X20
Power out for filter unit
X21
Power out for sample gas line
X22
Power out for gas analyzer EL3000 or AO2000
X23
Power out for sample gas cooler or sample gas feed unit
X24
Power out NO converter or other sample handling device
X25
Power out spare
X26
Power supply inlet
X30
PT100 Terminal for filter unit or sample gas line
X32
Status signal (D-Sub 15-pin)
1
Ground terminal
Figure 8: Electrical connections rear panel
X30 Pt100 terminal assignment
Terminal
Function / comments
1
Pt100 from filter unit, white conductor
2
Pt100 from filter unit, red conductor
3
Pt100 from filter unit, red conductor
4
Pt100 from sample gas line, white conductor
5
Pt100 from sample gas line, red conductor
6
Pt100 from sample gas line, red conductor
X32 D-sub 15 pin assignment
Pin
Comments
Function
1
To analyzer 1st DI/DO module DI 3:5
Failure filter unit /
sample gas line
2
To analyzer 1st DI/DO module DI
3:4
3
From NO converter D-sub 9, Pin 5
Failure NO converter
4
To analyzer 1st DI/DO module DI
4:1
Failure gas cooler /
converter
5
To analyzer 1st DI/DO module DI 4:3
6
From gas cooler X3:3 / gas feed unit X3:3
Failure gas cooler
7
To analyzer 1st DI/DO module DO 4:13
Switching
sample gas
valve
8
To analyzer 1st DI/DO module DO
4:15
9
To analyzer 2nd DI/DO module DO 3:16
Switching test gas
valve 3
10
To analyzer 2nd DI/DO module DO
3:14
11
To analyzer 2nd DI/DO module DO 2:21
Switching test gas
valve 2
12
To analyzer 2nd DI/DO module DO
2:19
13
To analyzer 2nd DI/DO module DO 1:22
Switching test gas
valve 1
14
To analyzer 2nd DI/DO module DO
1:20
15
From gas cooler X3:2 / gas feed unit X3:2 and NO
converter D-sub 9, Pin 9
Failure gas cooler /
converter
F00234
1

14 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
… 5 Installation
… Electrical connections
Electrical Data
Input voltage
230 V AC ±10 %, 50 Hz or 115 V AC ±10 %, 60 Hz
Note
The unit is prepared to support both voltage ranges.
Take care to have the connected components in the correct
voltage range available, when carrying out the engineering.
Power consumption
• 230 V AC 50 Hz: max. 3500 VA, max. 16 A.
• 115 V AC 60 Hz: max. 1750 VA, max. 16 A.
Internal fuse protection
• 10 A (sample gas line)
• 6 A (filter unit)
• 10 A (internal 24 V supply, external devices)
External fuse protection
16 A (to be provided by customer)
Safety
In accordance with EN 61010-1
IP rating
Protection class I
Overvoltage category
II
Pollution degree
2
Elektromagnetic compatibility
Tested to EN 61326-1:2013
Emitted interference
Class B
Immunity to interference
Industrial environment

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 15
Connecting the Pt100 temperature sensors (option)
The temperature sensors of the heated filter unit (option) and
the heated sample gas line must be connected to the utility unit:
• Connect the Pt100 temperature sensor of the heated
filter unit and the heated sample gas line to
terminals -X30 (see X30 Pt100 terminal assignment on
page 13).
Refer to the wiring diagrams in the delivered drawings set.
Connecting the control and status signals
Depending on the version of the utility unit or the built-in
options, these signals must be connected between the utility
unit and the gas analyzer:
• Control signals of the test gas solenoid valves,
• Status signals of the temperature controllers.
1. Connect the D-sub plug of the supplied cable to the
connector -X32 (see X32 D-sub 15 pin assignment on
page 13) on the utility unit.
2. Connect the leads at the other end of the supplied cable
to the corresponding inputs and outputs of the digital
I/O modules in the gas analyzer.
Refer to the wiring diagrams in the delivered drawings set and to
the operator's manual of the gas analyzer.
Connecting the power supply of the external devices
1. Connect the cable from the heated sample gas line to the
supplied plug and connect the cable to socket -X21.
2. Connect the cable from the heated filter unit to
socket -X20.
3. Use the delivered cables to connect the power supply of
the gas analyzer and sample handling devices to
sockets -X22 to -X25.
Refer to the wiring diagrams in the delivered drawings set.
Connecting the utility unit to the power supply
1. Make sure the power supply leads have an adequately
dimensioned (16 A) protective device (breaker).
2. Make sure the POWER switch on the front panel of the
utility unit is switched OFF.
3. Install a switched outlet or a breaker in the power supply
wiring near the utility unit. This should allow the utility
unit to be completely disconnected from the power
supply if necessary.
The disconnection device should be easily accessible and
identified in such a way that its relationship to the
equipment that it is designed to disconnect can be clearly
seen.
4. Connect the fixed power supply cable to the power
supply.
Refer to the wiring diagrams in the delivered drawings set.

16 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
6Commissioning and operation
Safety instructions for operation
When safe operation can no longer be assured
If it is apparent that safe operation is no longer possible, the
device should be taken out of operation and secured against
unauthorized use.
The possibility of safe operation is excluded:
• If the device is visibly damaged,
• If the device no longer operates,
• After prolonged storage under adverse conditions,
• After severe transport stresses.
Checks prior to commissioning
The following points must be checked before commissioning the
device:
• Correct wiring in accordance with Electrical connections
on page 12.
• Correct grounding of the device.
• The ambient conditions must meet the requirements set
out in the specification.
• The power supply must meet the requirements set out on
the name plate.
Starting-up the utility unit
NOTICE
Damage to the gas analyzer
Condensation might damage the connected gas analyzer.
• The sample gas and test gases must not be switched on
until the upstream cooler unit's lead time is finished.
1. Activate the power supply using the main switch.
• The utility unit is ready for operation without delay.
2. Switch on the power supply of the external devices using the
corresponding circuit breakers:
• Heated filter unit,
• Heated sample gas line
• Gas analyzer and other sample handling devices
3. Only for version with temperature controllers:
The temperature controllers are set at the factory and no
operations are required.
Wait until the temperature reaches the set point. This can
take approx. 2 hours.
4. Only for version with solenoid valves:
Check the gas connections.

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 17
7Diagnosis / Troubleshooting
Malfunctions
Problem
Cause
Corrective action
Utility unit not working
Power supply interrupted
Reconnect the power supply
No power
supply in external device
Utility unit not activated
Turn on main switch
Incorrect cable connection
Reconnect the cables
Inability to switch on the circuit breaker
Short circuit
Switch off utility unit and repair defective external device
Overload
Check max. current/power consumption relative to
current rating of the circuit breaker
Incorrect calibration
Signal cable is not correct connected between utility unit
and gas
analyzer
Reconnect the cable, check digital outputs in the gas
analyzer
Incorrect configuration of digital outputs in gas analyzer
Change the configuration of digital outputs
Test gas supply not connected or closed
Connect and open the test gas
supply
Test gas solenoid valve defective
Notify service
Lack of zero air calibration
Clogged filter
Replace filter
Fuses blown
Replace fuses
Sample solenoid valve defective
Notify service
Gas pump installed downstream is not activated
Activate gas pump
Temperature of heated line or heated filter
unit does not increase
Incorrect temperature sensor connection
Check cable and reconnect
Temperature sensor defective
Replace temperature sensor
Temperature controller working
incorrectly
Notify service
Sample gas flow insufficient
Utility unit working incorrectly
Check utility unit
Gas line blocked
Remove blockage, check upstream modules (filters, cooler,
etc.)
Leaking gas path
Check gas path seal integrity and repair leakage

18 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
8Maintenance / Repair
Safety instructions
CAUTION
Risk of injury
Risk of injury due to improperly performed maintenance work.
The operations described in this chapter require specialized
knowledge, and sometimes involve the necessity of working
on the utility unit with its cover open and live!
• Maintenance work must therefore only be carried out by
qualified and specially trained persons.
NOTICE
Damage to the device!
Damage to the device due to incorrect fuses.
• Only fuses of the specified type and rated current should
be used as replacements.
• Never use patched fuses.
• Do not short-circuit the fuse holder contacts.
When safe operation can no longer be assured
If it is apparent that safe operation is no longer possible, the
device should be taken out of operation and secured against
unauthorized use.
The possibility of safe operation is excluded:
• If the device is visibly damaged,
• If the device no longer operates,
• After prolonged storage under adverse conditions,
• After severe transport stresses.
Spare parts
Repair and maintenance activities may only be performed by
authorized customer service personnel.
When replacing or repairing individual components, use original
spare parts.
Cleaning
If necessary, clean the outside of the device with a damp cloth
and mild cleaning agents. Make sure that no water drops
penetrate into the device.
Checking gas path seal integrity
It is necessary to check the tightness of the gas paths regularly.
1. Block off all gas outlets.
2. Activate the power supply of the utility unit (otherwise, the
solenoid valves cannot be activated).
3. Apply a positive pressure of 100 mbar to the sample gas
inlet.
4. Using a U-pipe manometer (or other type) check the drop in
pressure; this must not exceed 1 mbar per minute.
5. Repeat steps 3. and 4. for all test gas inlets; the appropriate
solenoid valve must be activated.

SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B 19
9Dismounting and disposal
Dismounting
WARNING
Risk of injury due to process conditions.
The process conditions, for example high pressures and
temperatures, toxic and aggressive measuring media, can
give rise to hazards when working on the device.
• Before working on the device, make sure that the process
conditions do not pose any hazards.
• If necessary, wear suited personal protective equipment
when working on the device.
• Depressurize and empty the device / piping, allow to cool
and purge if necessary.
NOTICE
Damage to the analyzer system!
Damage to the analyzer system and its components due to
improper decommissioning.
• Before the utility unit is shut down it must be purged to
prevent the accumulation of condensate and deposits.
• Make sure the utility unit is free of residual moisture that
can freeze if low temperatures are encountered during
storage and transport.
Shutting down the utility unit
1. Switch off the power supply of the external devices using the
corresponding circuit breakers.
2. Switch off the power supply using the main switch.
3. Shut off the sample gas supply to the utility unit.
4. Remove the gas lines from the connections on the utility unit.
5. Thoroughly purge the utility unit gas paths with an inert gas.
6. Fully tighten the gas connections.
7. Disconnect the electrical leads.
• Use suited tools to disassemble the device, taking the weight
of the device into consideration.
• If the device is to be used at another location, the device
should preferably be packaged in its original packing so that
it cannot be damaged.
• Observe the notices in Returning devices on page 9.
Disposal
Note
Products that are marked with the adjacent symbol
may
not be disposed of as unsorted municipal waste
(domestic waste).
They should be disposed of through separate
collection of electric and electronic devices.
This product and its packaging are manufactured from materials
that can be recycled by specialist recycling companies.
Bear the following points in mind when disposing of them:
• As of 8/15/2018, this product will be under the open
scope of the WEEE Directive 2012/19/EU and relevant
national laws (for example, ElektroG - Electrical
Equipment Act - in Germany).
• The product must be supplied to a specialist recycling
company. Do not use municipal waste collection points.
These may be used for privately used products only in
accordance with WEEE Directive 2012/19/EU.
• If there is no possibility to dispose of the old equipment
properly, our Service can take care of its pick-up and
disposal for a fee.

20 SCC-U UTILITY UNIT | OI/SCC-U-EN REV. B
10 Specification
Note
The device data sheet is available in the ABB download area at
www.abb.de/analytical.
11 Additional documents
Note
All documentation, declarations of conformity, and certificates
are available in ABB's download area.
www.abb.com/analytical