Bartec SILAS A7-3741-1110 Series User manual

A1-3741-7D0001-03/2017-BARTEC-294266
Operating instructions
Steuerung SILAS Control unit Type: A7-3741-1110/....; Pressure monitor Type: 17-51P3-1604
Document no.: A1-3741-7D0001 Version: 31 March 2017 / Rev. F

BARTEC GmbH Tel.: [phone] [email protected]
Max Eyth-Straße 16 Fax: [phone] www.bartec.de
97980 Bad Mergentheim
Germany
Reservation: Technical data subject to change without
notice. Changes, errors and misprints may not
be used as a basis for any claim for damages.
Operating Instructions
SILAS controller
Control unit
Type: A7-3741-1110/….
Pressure monitor
Type: 17-51P3-1604
Document no.: A1-3741-7D0001
Version: 30. June 2017 / Rev. F
Contents
Germany
English
1 - 60
Appendix
EU Declaration of Conformity

2
- EMPTY PAGE -

SILAS Control Unit
Type A7-3741-1110/....
Table of Contents
Technical data subject to change without notice.
1. Safety 6
1.1 This Manual 6
1.1.1 Languages 7
1.2 Handling the Product 7
1.3 Use in Accordance with the Intended Purpose 7
1.3.1 Exclusive Purpose 7
1.3.2 Improper Use 7
1.4 Operator’s Obligations 7
1.5 Safety Instructions 8
1.5.1 General Safety Instructions 8
1.5.2 Safety Instructions for Operation 8
1.6 Standards Conformed To 9
1.7 Ex Protection Type and Certification 10
1.8 Warranty 11
2. Product Description 12
2.1 “Pressurised Enclosure” Type of Protection 12
2.2 SILAS Controller 12
2.3 Schematic Diagram of the SILAS Controller in Zone 2 13
2.4 Schematic Diagram of the SILAS Controller in Zone 22 14
2.5 SILAS Control Unit 15
2.6 Pressure Monitor 16
2.7 Digital Purge Gas Valve 16
2.8 Pressure Reducer with Pressure Gauge 17
2.9 Purge Gas Nozzle 17
2.10 Purge Gas Nozzle Zone 22 17
2.11 Mounting Kit for Internal Installation 18
3. Installation 19
3.1 Mounting Positions 19
3.2 SILAS Controller - External Mounting 20
3.2.1 Control Configuration 20
3.2.2 Installation of the Control Unit 21
3.3 SILAS Controller - Internal Mounting 22
3.3.1 Control Configuration 22
3.3.2 Mounting the Control Unit 23
3.3.3 Mounting Atmosphere Measuring Point 24
3.4 Mounting Pressure Monitor 25
3.5 Purge Gas Supply 26
3.5.1 Installation of the G1/4″ Purge Gas Supply 27
3.5.2 Mounting of the G1/2″ Purge Gas Supply 28
3.5.3 Installation of the Purge Gas Supply for Enclosures Used in Dust Explosion-Endangered Areas 29
4. Connections 30
4.1 Pneumatic Connections 30
4.2 Electrical Connections 31
4.2.1 Safety Instructions for the Electrical System 31
4.2.2 Directions for Wiring the SILAS Control Unit 31
4.2.3 Electrical Connections to the SILAS Control Unit 32
5. Operation 33
5.1 Setting of Parameters 33
5.2 “ON/OFF” Rotary Switch 33
5.3 “Parameters” Rotary Switch 33
5.4 “+”, “-“ and “SET” Buttons 34

Table of Contents
SILAS Control Unit
Type A7-3741-1110/****
Technical data subject to change without notice.
2
5.5 Changing of Levels 34
6. Commissioning 35
6.1 General Settings for Commissioning 35
6.1.1 Purging Function 35
6.1.2 K3 Relay 35
6.2 Commissioning of the SILAS Controller for Zone 2 36
6.2.1 Defining the Operating Pressure 36
6.2.2 Determination of the purging pressure 37
6.2.3 Purge time Calculate 37
6.2.4 Checking the Purging Phase 38
6.2.5 Checking the Operating Phase 39
6.3 Commissioning of the SILAS Controller for Zone 22 40
6.3.1 Define the Operating Pressure 40
6.3.2 Checking the Operating Phase 40
6.4 Adjusting the Leakage Air Needle 41
6.5 Safety During Operation 42
6.6 Types of Purge gas 42
7. Operation 43
7.1 Operating Phases of the SILAS Controller for Zone 2 43
7.2 Flow Diagram 43
7.3 Preparatory Phase 43
7.4 Purging Phase 44
7.5 Operating Phases of the SILAS Controller for Zone 22 45
7.5.1 Flow Diagram 45
7.5.2 Preparatory Phase 45
7.5.3Operating Phase 45
7.6 Bypass-Operation During the Operating Phase 46
8. Maintenance and Care 47
8.1 Inspection Table for Commissioning and Maintenance 48
9. Malfunctioning and Troubleshooting 49
9.1 Fault Table 49
10. Technical Data 51
10.1 SILAS Control Unit 51
10.2 Pressure Monitor 52
10.3 Digital Purge Gas Valve with Leakage Air Needle Valve 52
10.4 Requirements for Purge Gas 52
10.5 SILAS Control Purge Gas Diagram 53
11. Order Numbers 54
11.1 SILAS Control Unit 54
11.2 Pressure Monitor 54
11.3 Accessories and Spare Parts 54
11.3.1 Digital Purge Gas Valve 54
11.3.2 Pressure Reducer 54
11.3.3 Adjustable Purge Gas Nozzle for Zone 22 54
11.3.4 Accessories for the SILAS Control 54
12. Appendix 55
12.1 Borehole Pattern for the SILAS Control Unit 55
12.2 Test and Assessment Report Form 56
13. Declaration of Conformity and Approvals 58
13.1 Declaration of Conformity 58

Safety
SILAS Control Unit
Type A7-3741-1110/....
Page 6 of 60
Technical data subject to change without notice.
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1. Safety
1.1 This Manual
O p e r a t i n g I n s t r u c ti o n s
It is essential to read and observe the contents of this documentation and this chapter in
particular before you install and operate the SILAS control unit.
This manual contains the information required to use the control unit in accordance with
its intended purpose. It is addressed to technically qualified personnel.
Familiarity with and the technically perfect implementation of the safety instructions and
warnings described in this manual are preconditions for safe installation and
commissioning. The safety notes and warnings in this documentation are given in a
general way and only qualified personnel will have the necessary specialised know-how
to interpret and implement them correctly in specific individual cases.
This manual is an integral part of the scope of supply even if for logistical reasons it can
be ordered and delivered separately. If you need any further information, please ask the
BARTEC branch that is near you or responsible for your area.
Particularly important points in this documentation are marked with a warning symbol:
D A N G ER
The DANGER sign draws attention to a DANGER which will lead to death
or serious injury if not avoided.
W A R N I N G
WARNING draws attention to a danger which can lead to death or serious
injury if it is not avoided.
C A U T I O N
CAUTION draws attention to a danger which can lead to an injury if it is
not avoided.
A T T E N T I O N
ATTENTION draws attention to measures which should be taken to prevent damage
to property.
N o t e
Important instructions and information on effective, economical and
environmentally compatible handling.

SILAS Control Unit
Type A7-3741-1110/....
Safety
Techncal data subject to change without notice.
Page 7 of 60
1.1.1 Languages
Note
The original operating instructions were written in German. All other
available languages are translations of the original operating instructions.
The operating instructions are available in various languages. They are enclosed with
the product in the languages German, English, French, Italian, Spanish and Russian.
If you require any other languages, please ask BARTEC or request them when placing
the order.
1.2 Handling the Product
The product described in these operating instructions has been tested and left the
factory in perfect condition as regards meeting safety requirements. To maintain this
condition and ensure that this product operates perfectly and safely, use it only in the
manner described by the manufacturer. Appropriate transportation, suitable storage and
careful operation are also essential for the perfect and safe operation of this product.
The SILAS control unit must be mounted properly and securely onto the pressurised
enclosure if it is to work perfectly and correctly.
1.3 Use in Accordance with the Intended Purpose
1.3.1 Exclusive Purpose
The SILAY controller serves exclusively as a controlling and monitoring device for
pressurised enclosures and is intended for use in Explosion Group II, Category 3G/D
and Temperature Class T4 or T6.
The permissible operating data for the device being used must be observed.
1.3.2 Improper Use
Any other use is not in accordance with the intended purpose and can cause damage
and accidents. The manufacturer will not be liable for any use beyond that of its
exclusive intended purpose.
1.4 Operator’s Obligations
The operator undertakes to restrict permission to work on the SILAS control unit to
people who:
are familiar with the basic regulations on safety and accident prevention and have
been instructed in the use of the SILAS control unit;
have read and understood the documentation, the chapter on safety and the
warnings.
The owner/managing operator checks that the safety regulations and accident
prevention rules applicable to the respective application are being observed.

Safety
SILAS Control Unit
Type A7-3741-1110/....
Page 8 of 60
Technical data subject to change without notice.
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1.5 Safety Instructions
1.5.1 General Safety Instructions
Do not wipe devices with a dry cloth or clean them in a hazardous area!
Do not open devices in a hazardous area.
The general statutory regulations or directives relating to safety at work, accident
prevention and environmental protection legislation must be observed, e.g. the
German industrial health and safety ordinance (BetrSichV) or the applicable
national ordinances.
In view of the risk of dangerous electrostatic charging, wear appropriate clothing
and footwear.
Keep the devices away from moisture.
1.5.2 Safety Instructions for Operation
When setting up or operating explosion-resistant electrical systems, the IEC/EN 60079-
14 (NEC for USA/CEC for Canada) and all relevant installation and operating regulations
must be observed.
Upkeep
For electrical systems the relevant installation and operating regulations must be
complied with (e.g. Directive 99/92/EC, Directive 94/9/EC, German industrial
health and safety ordinance (BetrSichV), the applicable national ordinances IEC
60079-14 and the DIN VDE 0100 series)!
The disposal of this equipment must comply with the national regulations on the
disposal of waste.
Maintenance
Regular maintenance is not necessary if the device is operated correctly, in
accordance with the installation instructions and environmental conditions. See
Chapter 8 on “Maintenance and Care”.
Inspection
Under IEC 60079-19 and EN 60079-17, the owner/managing operator of
electrical installations in hazardous areas is obliged to have these installations
checked by a qualified electrician to ensure that they are in a proper condition.
Repairs
Repairs on explosion-protected operating equipment may be done only by
authorised persons working in accordance with the latest developments in
technology and using original spare parts. The relevant regulations must be
observed.
Commissioning
Before commissioning, check that all components and documents are there.

SILAS Control Unit
Type A7-3741-1110/....
Safety
Techncal data subject to change without notice.
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1.6 Standards Conformed To
The SILAS control unit conforms to Directive 94/9/EC for devices and protective systems
for use for their intended purpose in hazardous areas (ATEX Directive). Pursuant to this
directive, the following standards serve as a basis for the SILAS control unit:
Standard
Designation
EN 60079-0:2012 +
A11:2013
IEC 60079-0:2011
+ Cor. 2012 + Cor.2013
Edition: 6.0
Explosive atmospheres -
Part 0: Equipment - General requirements
EN 60079-2:2014
IEC 60079-2:2014
+ Cor. 2015
Edition: 6
Explosive Atmospheres -
Part 2: Equipment protection by pressurised enclosure
“p”
EN 60079-15:2010
IEC 60079-15:2010
Edition: 4
Electrical apparatus for explosive gas atmospheres -
Part 15: Construction, test and marking of type of
protection "n" electrical apparatus
EN 60079-31:2014
IEC 60079-31:2013
Edition: 2
Explosive Atmospheres -
Part 31: Equipment dust ignition protection by
enclosure “t”
EN 61000-6-3:2007 +
A1:2011
IEC 61000-6-3:2006
+ A1:2010
Electromagnetic Compatibility (EMC) -
Part 6-2: Generic standards - Immunity for industrial
environments
EN 60529:1991 +
A1:2000+A2:2013
IEC 60529:1989
+ A1:1999 + A2:2013
Electromagnetic Compatibility (EMC) -
Part 6-4: Generic standards -
Immunity for residential, commercial and light-industrial
environments
EN 60529:1991 +
A1:2000+A2:2013
IEC 60529:1989
+ A1:1999 + A2:2013
Degrees of protection provided by enclosures (IP code)
EN 61010-1:2010
IEC 61010-1:2010
+ Cor. 2011
Safety requirements for electrical equipment for
measurement, control, and laboratory use.
Part 1: General requirements

Safety
SILAS Control Unit
Type A7-3741-1110/....
Page 10 of 60
Technical data subject to change without notice.
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1.7 Ex Protection Type and Certification
The devices are certified for installation in the following areas:
ATEX (Europe)
Ex type of protection
II 3 G Ex nA nC [pzc] IIC T4 Gc
II 3 G Ex nA nC [pzc] IIC T6 Gc
II 3 D Ex tc [pzc] IIIB T85 °C Dc
Certification
TÜV 09 ATEX 553359 X
IECEx (International / Australia)
Ex type of protection
Ex nA nC [pzc] IIC T4 Gc
Ex nA nC [pzc] IIC T6 Gc
Ex tc [pzc] IIIB T85 °C Dc
Certification
IECEx TUN 10.0030X
CSA (USA / Canada)
Ex type of protection
Class I, Zone 2
AEx nA nC [pz] IIC T4/T6 Gc
Class II, Zone 22
AEx tc [p] IIIB T85 °C Dc
Certification
CSA 13.2654547 X
TR (Russia / Kazakhstan / Belarus)
Ex type of protection
ExnAnCIICT6
ExnAnCIICT4
Certification
TC RU C-DE.ГБ06.B.00434
CNEx (China)
Ex type of protection
Ex nA nC [pz] IIC T4 Gc
Ex nA nC [pz] IIC T6 Gc
Ex tc [p] IIIB T85 °C Dc
Certification
CNEx 13.1355 X
KTL (Korea)
Ex type of protection (gas)
Ex tc [pzc] IIIB T85 °C
Certification
KTL 13-KB4BO-0313
KTL 17-KA4BO-0245X (with viewing glas)
Ex type of protection (gas)
Ex tc [pzc] IIIB T85 °C
Certification
KTL 13-KB4BO-0635X
KTL 17-KA4BO-0246X (with viewing glas)
DNV (Marine approval)
Certification
DNV A-13179

SILAS Control Unit
Type A7-3741-1110/....
Safety
Techncal data subject to change without notice.
Page 11 of 60
1.8 Warranty
Warning
No modifications or conversions may be made unless the
manufacturer gives his approval in writing.
Explosion protection will no longer be ensured if non-specified components
are used. It cannot be guaranteed that parts procured from other suppliers
will have been designed and produced in conformance with safety
requirements and with the necessary stress tolerance.
Before making any modifications or implementing any conversions,
contact the manufacturer and obtain approval. Use only original
spare parts and original expendable parts.
N o t e
The manufacturer grants a complete guarantee only and exclusively for the
spare parts ordered from the manufacturer.
As a basic rule, our “General Conditions of Sale and Delivery” apply. These are available
to the owner/managing operator at the latest on formation of a contract. Guarantee and
liability claims for personal injury and damage to property are excluded if they are due to
one or more of the following reasons:
use of the SILAS control unit for a purpose other than that for which it is intended.
incorrect installation, commissioning, operation and maintenance of the SILAS
control unit.
non-compliance with the instructions in the manual with respect to transport,
storage, assembly, commissioning, operation and maintenance.
structural modifications to the SILAS control unit without our prior authorisation.
inadequate monitoring of components that are subject to wear.
repairs done incorrectly.
disasters due to the effects of foreign matter or force majeure.
We guarantee the SILAS control unit and its accessories for a period of 1 year starting
on the date of delivery from the Bad Mergentheim factory. This guarantee covers all
parts of the delivery and is restricted to the replacement free of charge or the repair of
the defective parts in our Bad Mergentheim factory. As far as possible, the delivery
packaging should be kept for this purpose. In the event of such a claim, the goods must
be returned to us after written arrangement. The customer cannot claim to have the
repairs done at the site of installation.

Product Description
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Type A7-3741-1110/....
Page 12 of 60
Technical data subject to change without notice.
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2. Product Description
2.1 “Pressurised Enclosure” Type of Protection
The Ex p type of protection, referred to as “pressurised enclosure”, is based on the
measure of purging out any explosive gases that are in a closed enclosure and then
generating and maintaining a level of pressure that is higher than that of the ambient
atmosphere. As the pressure inside the enclosure is higher than the atmospheric
pressure, it is not possible at any time for explosive gases to penetrate the inside of the
enclosure. This creates an Ex-free area in which electrical devices that are not
themselves explosion-proof can be installed and operated.
The SILAS control unit described in these operating instructions functions with
“pressurised enclosure with leakage loss compensation” technology. Specifically this
means that the positive pressure in an enclosure is maintained by the addition of purge
gas to compensate for the leakage losses from the enclosure.
To ensure that an explosive atmosphere that has penetrated during downtimes cannot
become a danger, the enclosure must be flushed with purge gas (compressed air or
inert gas) before it is commissioned. The quantity depends on the inspection during first-
time operation. The rate of flow is measured or determined at the pressurised
enclosure’s outlet.
Since a safe condition in the enclosure is not reached until the beginning of the
operating phase, it is necessary to use explosion-proof versions of the SILAS controller
with its components and the purge gas valve.
2.2 SILAS Controller
Die SILAS controller is an automatic control for monitoring the pressure of the
pressurised control cabinets in the hazardous areas of Zone 2 (Ex pz) or 22 (Ex pD). It
consists of the SILAS control unit, the SILAS pressure monitor, a digital purge gas valve
and a pressure reducer.
The SILAS controller is suitable for all standard applications for pressurised enclosures.
The electrical installed parts inside the pressurised enclosure are enabled by the SILAS
control unit directly or with an additional switching device.
Once the SILAS control unit with its individual assembly groups have been mounted on
the pressurised enclosure and the mains voltage and purge gas have been connected,
the pressurised system starts automatically.
The SILAS controller controls the flow of purge gas and the pressure inside the
enclosure during the purging phase.
When the operating phase is initiated, the components mounted in the pressurised
enclosure are automatically activated by the SILAS control unit. The pressure inside the
pressurised enclosure is maintained automatically during the operating phase and any
leakage losses are compensated.

SILAS Control Unit
Type A7-3741-1110/....
Product Description
Techncal data subject to change without notice.
Page 13 of 60
2.3 Schematic Diagram of the SILAS Controller in Zone 2
Item
Designation
Purge gas flow

Pressurised enclosure

SILAS control unit

Purge gas valve with purge gas nozzle (purging flow restriction)

Pressure reducer with pressure gauge

SILAS pressure monitor module







Product Description
SILAS Control Unit
Type A7-3741-1110/....
Page 14 of 60
Technical data subject to change without notice.
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2.4 Schematic Diagram of the SILAS Controller in Zone 22
Position
Designation
Purge gas flow

Pressurised enclosure

SILAS control unit

Pressure reducer with pressure gauge

Pressure monitor module






SILAS Control Unit
Type A7-3741-1110/....
Product Description
Techncal data subject to change without notice.
Page 15 of 60
2.5 SILAS Control Unit
Warning
Processes with high electromagnetic radiation.
The SILAS control unit must not be mounted in areas in which high levels of
electromagnetic radiation can arise.
Inspect the site of installation for electromagnetic radiation.
The SILAS control unit can be mounted inside or outside the pressurised enclosure. For
internal installation, e.g. on the mounting plate, it will also be necessary to use the
internal installation kit.
The system pressure levels and the system parameters can be shown on the integrated
display inside the control unit. The levels can be changed by pressing pushbuttons.
Construction
Standard
Optionale Schauscheibe





Item
Designation
Function

Pressure measuring head
Pressure measurement

Top enclosure
Control unit

Opt. Viewing glass
Viewing glass

Bottom enclosure
Junction box

Cable glands
Cable entry

Product Description
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Type A7-3741-1110/....
Page 16 of 60
Technical data subject to change without notice.
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2.6 Pressure Monitor
DANGER
DANGER due to deposits of dust.
When used in Dust Ex applications, deposits of dust can build up in the
pressure monitor.
If a lot of dust accumulates, clean the pressure monitor twice a year.
The pressure monitor has two functions inside the SILAS control. Firstly, it serves as a
pressure control valve which opens if the internal pressure is too high and reduces the
excessive pressure. Secondly, an orifice is integrated in the pressure monitor which
determines the flow during the purge time.
The pressure monitor must be mounted separately from the SILAS control unit in the
pressurised enclosure.
2.7 Digital Purge Gas Valve
Warning
The digital purge gas valve is permitted only for operation with a
SILAS control unit which has a suitable valve fuse.
If the digital purge gas valve is operated with a control module which has
inadequate fusing, there is a risk that the valve fuse will be destroyed.
Check that the purge gas valve is compatible with the SILAS
control unit.
The digital purge gas valve controls the supply of purge gas.
It is an upstream solenoid valve and its function is to introduce purge gas into a
pressurised enclosure for Zone 2.
Here, the digital purge gas valve is controlled by the SILAS control unit to allow the purge
gas valve to open to purge the pressurised enclosure and close again when the purging
is finished.
Two side-mounted, adjustable needles for air leakage ensure that the leakages arising
in the pressurised enclosure are compensated.

SILAS Control Unit
Type A7-3741-1110/....
Product Description
Techncal data subject to change without notice.
Page 17 of 60
2.8 Pressure Reducer with Pressure Gauge
Attention
Material damage when the maximum permissible internal pressure is exceeded in
the pressurised enclosure.
If the supply pressure is set at too high a level, there is a risk of destroying the
pressurised enclosure.
Mark the supply pressure on the pressure gauge.
The supply pressure setting on the pressure gauge must be checked regularly.
Lock the pressure reducer.
The upstream pressure reducer is a diaphragm pressure regulator with secondary
venting for lowering the pressure of externally supplied purging air.
The levels for the pressure reducer are set by means of a hand wheel and the adjusted
reduced pressure can be read on the pressure gauge.
Pressure reducers are available in sizes G1/4” and G1/2” for supply to the pressurised
enclosure.
The relevant technical data can be found in the data sheet.
To select the pressure reducer, see Chapter 3.5 “Purge gGas Supply”.
2.9 Purge Gas Nozzle
Attention
Material damage caused by the absence of a purge gas nozzle.
The build-up of internal pressure can give rise to the risk of excessive stress on the
pressurised enclosure.
Make sure there is a purge gas nozzle there.
The purge gas nozzle serves to mechanically restrict the maximum flow.
It restricts the maximum flow if the purge gas valve is defective.
2.10 Purge Gas Nozzle Zone 22
Attention
Material damage caused by the absence of a purge gas nozzle.
The build-up of internal pressure can give rise to the risk of excessive stress on the
pressurised enclosure.
Make sure there is a purge gas nozzle there.
The purge gas nozzle for Zone 22 is adjustable and serves to limit the maximum
pressure inside the pressurised enclosure.
It is used in a pD version of a pressurised enclosure.

Product Description
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Page 18 of 60
Technical data subject to change without notice.
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2.11 Mounting Kit for Internal Installation
The mounting kit for internal installation is necessary if the SILAS control unit is fitted
into a pressurised enclosure. In this case, the reference connection for atmospheric
pressure is conducted outwards by means of a hose line.
The mounting kit consists of:
a straight M5 screw-in connector for a hose with an external diameter of 4 mm
an R 1/8" atmospheric connection, a 90° connector for a 4-mm hose, sleeve with
sealing washers
2-m hose 4 x 2 mm
a set of mounting instructions

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Installation
Techncal data subject to change without notice.
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3. Installation
The SILAS controller can be mounted in various installation positions on the pressurised
enclosure. The positioning of the SILAS controller on the pressurised enclosure is
described in the following chapter.
The SILAS control unit can be mounted in the interior or on the exterior of the
pressurised enclosure.
The pressure monitor and the purge gas valve must be installed separately from the
SILAS control unit.
3.1 Mounting Positions
For ideal purging, the SILAS controller (consisting of: SILAS control unit, pressure
monitor and purge gas valve) should be installed in one of the following positions: