Awite AwiECO User guide

PART A: PRODUCT DESCRIPTION, INSTALLATION AND OPERATION AWIECO AWITE BIOENERGIE
Original Instruction Manual
(Version: 12.0)
PART A: PRODUCT DESCRIPTION, INSTALLATION AND OPERATION AWIECO AWITE BIOENERGIE
Original Instruction Manual
(Version: 12.0)

Contact and Imprint
Please find the latest information online at WWW.AWITE.COM . For any questions, comments or
suggestions, please send an email to [email protected] .
Awite Bioenergie GmbH
Grünseiboldsdorfer Weg 5
85416 Langenbach Niederhummel, Germany
Phone: +49 8761 / 72 162 - 0
Fax: +49 8761 / 72 162 - 11
Email: [email protected]
http://www.awite.com
©2020 Awite Bioenergie GmbH
Errors and changes reserved
2

Table of Contents
Table of Contents
1 Preface...................................................................................................................................... 5
2 Identification...............................................................................................................................6
3 Safety Instructions Part A.........................................................................................................7
4 Product description..................................................................................................................10
4.1 Intended Usage...................................................................................................... 10
4.2 Device Category According to ATEX Classification...............................................11
4.2.1 Device category not intended for installation in an Ex-zone.................................. 11
4.2.2 Device category intended for installation in an Ex-zone 2.....................................11
4.2.2.1 Safety device for monitoring the interior space......................................................12
4.3 Description of the Gas Analysis System and Dimensions..................................... 13
4.4 Ambient Conditions and Limits for Operation and Storage....................................16
4.4.1 Ambient Temperature.............................................................................................16
4.4.2 Ambient humidity....................................................................................................16
4.4.3 Installation height....................................................................................................16
4.4.4 Humidity and dust...................................................................................................16
4.4.5 Measuring gas pressure.........................................................................................16
4.4.6 Measuring gas, fresh air and exhaust air requirements.........................................17
4.5 Hazards from gas...................................................................................................17
4.5.1 Zone division.......................................................................................................... 18
4.5.2 Flame or explosion propagation over gas bearing lines........................................ 18
4.5.3 Leakage in the Measuring Gas Supply Line..........................................................18
4.5.4 Gas volume............................................................................................................ 18
4.5.5 Leaks in the Gas Analysis System........................................................................ 18
4.5.6 Release of Potentially Toxic and Harmful Gases...................................................19
5 Preparing the Gas Analysis System for Use..........................................................................20
5.1 Transport and Storage........................................................................................... 20
5.2 Installation...............................................................................................................20
5.2.1 Main Switch Mains Disconnection Facility............................................................. 21
5.2.2 Terminal boxes for electrical connections..............................................................21
5.2.2.1 Terminal box AwiECO............................................................................................22
5.2.2.2 Connection Cable 100–240 V for Power Supply....................................................22
5.2.2.3 Connection cable for DI (digital inputs) and DO (digital outputs)...........................22
5.2.2.4 Connection cable for AI (analogue inputs) and AO (analogue outputs).................23
5.2.3 Potential equalization..............................................................................................23
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Table of Contents
5.2.4 Data transmission of signals..................................................................................24
5.2.4.1 Profibus...................................................................................................................24
5.2.4.2 Analogue outputs....................................................................................................25
5.2.5 Information on Cable and Lines Routing................................................................25
5.2.6 Connection of analysis gas lines............................................................................26
5.2.6.1 Gas Inlets AwiECO.................................................................................................26
5.2.6.2 Extraction Points for Analysis Gas.........................................................................27
5.2.6.3 Laying of Analysis Gas Lines.................................................................................28
5.2.6.4 Exhaust air – Discharge of the Measuring Gas.....................................................28
5.2.7 Installation of Humidity and Flow Sensor AwiFLOW..............................................30
5.2.8 Initial Operation...................................................................................................... 32
6 Handling of the Gas Analysis System....................................................................................33
6.1 Maintenance........................................................................................................... 33
6.1.1 Cleaning..................................................................................................................33
6.1.2 Calibration...............................................................................................................34
6.1.3 Hydrogen sulphide filter..........................................................................................34
6.1.4 Detonation Flame Arrester.....................................................................................34
6.1.5 Connecting Tubes.................................................................................................. 34
6.1.6 Condensate traps................................................................................................... 35
6.2 Replacing a Fuse................................................................................................... 35
6.2.1 Specification Fuse F1 (Input Voltage 100–240 VAC).............................................35
6.2.2 Specification Fuse F2 (Power Supply Unit Output Voltage 24 VDC)..................... 35
6.3 Spare Parts List......................................................................................................35
6.4 Disposal.................................................................................................................. 36
6.5 Product Liability...................................................................................................... 36
7 Technical Data and Sensor Accuracy.................................................................................... 37
7.1 Technical Data........................................................................................................37
7.2 Accuracy, Service Life and Calibration of the Sensors..........................................37
8 Annex.......................................................................................................................................40
8.1 CE Declarations of Conformity...............................................................................40
8.1.1 CE Declaration of Conformity for Devices Not Intended to be Installed in an Ex-
Zone........................................................................................................................41
8.1.2 CE Declaration of Conformity for Devices Intended to be Installed in an Ex-
Zone........................................................................................................................42
8.2 IEC - Conformity Declaration................................................................................. 43
8.3 Certificat TÜV SÜD UL - CSA 61010-1-2012........................................................44
4

Preface
1 Preface
PLEASE READ THE INSTRUCTION MANUAL AND SAFETY INSTRUC-
TIONS CAREFULLY BEFORE INSTALLATION AND OPERATION!
This Instruction Manual provides you with information to assist you in using the gas analysis system. The
Instruction Manual is part of the product and has to be kept throughout the service life of the product.
When subsequently passing on the gas analysis system to a third party, the customer has to provide the
Instruction Manual along with it. The new owner of the system has to be trained in the regulations referred
to. If you receive an amendment to the Instruction Manual at a later stage, this amendment is also part of
the Instruction Manual.
The device may only be used in a technically perfect condition and for its intended use, with awareness of
safety aspects and possible hazards and in full adherence with the Instruction Manual. Please operate and
service your gas analysis system based on the information in this Instruction Manual.
The Instruction Manual for the Awite – Gas Analysis System consists of two parts:
Part A: Product Description, Installation and Operation
Part B: Operation
5

Identification
2 Identification
This Instruction Manual is intended for Awite Bioenergie GmbH gas analysis systems of the respective
series specified on the cover sheet. The type plate on the right hand side panel of the device indicates the
device type, the required voltage supply and the rated output.
The manufacturer's address is:
Awite Bioenergie GmbH
Grünseiboldsdorfer Weg 5
85416 Langenbach Niederhummel, Germany
Phone: +49 8761 / 72 162 - 0
Fax: +49 8761 / 72 162 - 11
Email: [email protected]
http://www.awite.com
6

Safety Instructions Part A
3 Safety Instructions Part A
The device is only designed for situations of intended use. A non-intended use can lead to personal
injury and property damage. Only use the device as intended.
The device measures combustible or explosive gases and is installed in their environment. There is
a potential risk of spread or ignition of a hazardous atmosphere. Make sure to observe the rules
regarding explosion protection.
Biogas contributes to the greenhouse effect and thus to climate change. If possible, do not
discharge gas into the atmosphere.
The rated overpressure is 100 mbar. In case a precision pressure regulator is installed, this may
fail (snagged membrane). A higher pressure may cause damage and leaks, whereby an explosive
atmosphere could arise. Ensure that no more than 100 mbar pressure is reached. Set a pressure
regulator before the precision pressure regulator to max. 100 mbar . The risk for pressure control
systems for process gas with an input pressure above 100 mbar is to be considered separately,
because in case of failure, large amounts of gas could leak out.
Parts inside the device are under electrical voltage. Danger to life by electric shock! ALL installation
repair maintenance operations on the gas analysis system or on the whole plant must only be carried
out in a de-energized state and when the system is completely turned off. Observe electrical safety
regulations.
Biogas contains hydrogen sulphide. Gas leakage can lead to acute inhalation toxicity. At a
concentration of hydrogen sulphide of more than 22,000 ppm or room volumes that are less than
the standard container size (32 m³) or air exchange rates of less than once per hour, the risk of a
possibly even deadly poisoning caused by hydrogen sulphide needs to be assessed individually and
appropriate measures have to be taken. Avoid small room volumes and low air exchange rates.
An improperly performed installation, electric installation, initial operation, or maintenance of the
gas analysis system may cause hazards, especially due to gas and electrical current. These activities
must therefore only be performed by trained personnel. The specialist personnel must have read
and understood the Instruction Manual and follow its instructions.
„Hydrogen sulphide is toxic. Watch out for smell of rotten eggs. Ventilate the room and do not
enter."
„Carbon monoxide is toxic. A suitable gas warning sensor must be used, unless the ventilation is
sufcient."
7

Safety Instructions Part A
The main switch serves as a mains disconnection facility to shut down the function and avoid hazards
caused by electricity. The device has to be installed in such a way that the main switch operation is
not impeded.
In case of a defect, gas leakage may occur. In case of insufcient ventilation, even small amounts can
lead to a hazard (poisoning, explosion) over a longer period of time. The device must therefore not
be installed in unvented shafts or poorly ventilated rooms.
Different electrical voltages may be present at the terminals in the terminal box. An incorrect
connection will lead to malfunction and hazards arising from electrical current. For information on
the allocation of the different terminals or the wiring in the terminal box please refer to the electric
diagram provided as part of the system.
Combustible gas could enter the device through the exhaust gas line and create an explosive
atmosphere there. Therefore, lead the exhaust lines separately and directly to the outside and have
nothing discharge into the exhaust gas line. In case of analysis gas recovery, ensure the exhaust gas
line is not longer than 20 m and have it lead the exhaust gas only into gas-bearing areas in which a
maximum underpressure or overpressure of 20 mbar prevails.
Gas which may be toxic, ammable or explosive ows through the exhaust gas line. Therefore,
the exhaust gas must not be released inside the building unless there is appropriately sufcient
ventilation.
The device conveys combustible gas. A continuous stay in the immediate vicinity of the device
may lead to a statistically increased risk of explosion. Therefore, no persons are allowed to stay
permanently in the vicinity of the device.
To ensure the safe and correct operation of the process analysis system, regular maintenance work
is an absolute necessity, as during this process wearing parts (such as seals) are replaced and the
whole system is checked thoroughly. Failure to comply increases the risk by gas leakage (danger of
explosion). The maintenance interval must therefore be observed.
The state of the gas analysis system must be checked on a regular basis, error messages need to
be addressed. In the event of the error messages "potentially dangerous atmosphere" or "risk of
explosion" as well as with loose hose ends, porous hoses or other leaks that lead to an explosion
hazard, disconnect the device from the gas supply and shut it down. Contact Awite or an Awite
contract partner.
"The drain of the condensate trap is a secondary source of gas release. In case of poor ventilation,
a hazardous explosive atmosphere may arise. Therefore please make absolutely sure to close the
discharge tap after emptying the condensate traps."
8

Safety Instructions Part A
The device contains fuses that are under electrical voltage. Danger to life by electric shock. Replace
the fuses only in a non-energized state. Observe electrical safety regulations.
Leakages in the AwiCONTAINER may create a hazardous atmosphere. The ventilation grilles are
important in order to dilute the air in case of leakages. These must not be closed.
Carbon monoxide is odorless and toxic. It can accumulate in the AwiCONTAINER. A poisoning can
be deadly. With carbon monoxide-containing gas, install a suitable CO gas alarm sensor.
Leaking fuel gas mixture may cause an explosion hazard in the AwiCONTAINER. Install an
electrocatalytic gas warning sensor, except for biogas with low leakage ow (pressure at sampling
point max 20 mbar) or low ammable gas concentration (less than 4 % v v).
Gas warning sensors can deliver too low readings or even become unusable due to hydrogen
sulphide in the air. Calibrate gas warning sensors in according to manufacturer's recommendation
(every 6 months). If the ambient air contains hydrogen sulphide, shorten the calibration interval (to 3
months).
The gas analysis system contains icons with the following meaning:
Attention, General Hazard Point. Refer to the documentation. Disregarding this can
lead to death or serious personal injuries or property damages.
Warning of dangerous electrical voltage.
Please also observe the safety instructions in Part B!
9

Product description
4 Product description
The following chapter contains information on the intended usage, the device category according to the
ATEX classification, the ambient conditions during operation and storage as well as safety information.
4.1 Intended Usage
WARNING
The device is only designed for situations of intended use. A non-intended use can lead to
personal injury and property damage. Only use the device as intended.
The gas analysis systems serve as analytical device for air, biogas, sewage gas, biomethane as well as
hydrogen up to 100vol% and hydrogen sulphide up to 5vol%. They are neither part of explosion protection
nor a warning device. They are used without any additional pressure reducing measures for measuring
biogas with a maximum of 20 mbar of underpressure or overpressure. The suitability for use in safety-
critical applications must be assessed by the user for each case. Reliability data can be provided by Awite
if required.
WARNING
The device is installed in the vicinity of combustible or explosive gases. Operating a non-explosion-
protected device in a hazardous atmosphere can cause an explosion with personal injury and property
damage. Do not place the device in a dangerous atmosphere unless a corresponding marking exists on
its housing.
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Product description
4.2 Device Category According to ATEX Classification
Applies only within the EU and in countries in which the ATEX Directive (2014/34/EU) also applies. The
ATEX marking is located on the left outside of the casing.
4.2.1 Device category not intended for installation in an Ex-zone
Marking per ATEX with
II 2/- G IIA
Gas-carrying pipes with inflammable or explosive gas of explosion group IIA (e.g. biogas) may be
connected to the device at the appropriate point (zone 2 or 1 in the interior of the line). The device itself
has to be installed outside of a hazardous atmosphere.
4.2.2 Device category intended for installation in an Ex-zone 2
Marking per ATEX and IEC EN 60079 with
II 2/3 G Ex nA IIA T1 Gc X
Gas-carrying pipes with inflammable or explosive gas (zone 2 or 1 in the interior of the line) may be
connected to the device at the appropriate point. The device itself may be installed in zone 2 according to
the requirements laid out hereafter. The ignition protection type nA applies to the exterior of the device.
Electrical plug connections may only be removed when the power supply is disconnected. The interior
space is monitored by means of a gas warning device. The power supply of the device has to be de-
energized by suitable means (e.g. relay SIL 1 or two redundant relays connected in series) on reaching the
shutdown threshold and may only be switched on again when falling below the switch-on threshold.
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Product description
4.2.2.1 Safety device for monitoring the interior space
A gas warning sensor of the ignition protection type
II 2G / EEx de IIC T4
for intended use as a safety or control device in order to detect methane / Zone 2 in accordance with the
requirements of Directive 2014/34/EU, sections 1.5.5 through 1.5.8 is available at Awite.
The measuring head is integrated in Awite Process Analysis. The evaluation unit which delivers the
shutdown signal must be installed outside of an Ex-zone. The disconnection of the power supply to the
Awite process analysis device takes place on site. The gas warning device is supplied with 24 VDC on site.
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Product description
4.3 Description of the Gas Analysis System and Dimensions
The gas analysis system is located inside a stainless-steel wall cabinet. The space requirement and list of
the exterior and interior views are summarized in the table below. The cabinet is mounted to the wall using
four wall clips (see illustration for dimensions). There needs to be enough room in front of the device for
opening the door arrangement and for operating the device.
Table 1: Mounting Dimensions Gas Analysis System
Mounting dimensions [mm]Device type
Width Height Depth
AwiECO 575 410 259
The analysis gas lines are routed to the system from the left hand side via the condensate traps for the
manual emptying of the system. Pressure-resistant pipes are recommended as analysis gas lines:
– Diameter 4/6mm or 1/8“/¼“
– Material: stainless steel 1.4401 or highly resistant plastic (depending on the site of operation,
stainless steel pipes might be obligatory)
All connections on the condensate traps and on the gas analysis system are implemented as hose screw
or pipe screw connections for these pipe cross-sections. For protection purposes, the analysis gas lines
should be run through protective tubes.
13

Product description
Figure 1: AwiECO including condensate traps on the outside
The equipment shown here serves as an example, as the components are individually assembled
according to customer requirements.
1. Main switch
2. Terminal box
3. USB connection
4. RJ45
5. Profibus IN
6. Profibus OUT
7. Potential equalization
8. Panel PC
9. Exhaust air
10. Supply of analysis gas
11. Mounting brackets for 2 condensate traps
12. Condensate traps
13. Supply of fresh air
14. Connections for measuring points
15. Connection for exhaust air
14

Product description
Figure 2: Assemblies in the gas analysis system AwiECO
The equipment shown here serves as an example, as the components are individually assembled
according to customer requirements.
1. Main switch
2. Line filter
3. Fuse terminal 100–240 VAC
4. Terminals 100–240 VAC
5. Power supply unit
6. Fuse terminal 24 VDC
7. AwiProtect
8. Terminals 24 VDC
9. AwiIO (PLC module)
10. Profibus module
11. Terminals shielding sensors
12. Water sensor AwiH2O
13. Membrane pump
14. Filter AwiClean
15. Valves
16. Oxygen sensor
17. Hydrogen sulphide sensor
18. Pressure sensor
19. Multi-gas sensor InfraFRED
20. AwiConnect
15

Product description
4.4 Ambient Conditions and Limits for Operation and Storage
Although the Awite gas analysis systems are designed for use under rough conditions, some requirements
concerning the location and environmental conditions should be met in order to obtain a high accuracy of
measurement and to avoid damaging the system.
4.4.1 Ambient Temperature
In the interior of the casing, the temperature can be 15°C higher than the ambient temperature. Therefore,
the ambient temperature for the device must be between5°C to 35°C in order to guarantee an exact
measurement of the sensors and not to damage the electronic components. The analysis systems are
calibrated at 25°C. All detailed specifications refer to this temperature, any deviations that occur under
significantly changed temperature conditions are sensor-related.
CAUTION
The temperature inside the device can be up to 15°C higher than the ambient temperature. Excessively
high temperatures can lead to damage to components and reduce the service life of sensors. Sub-zero
(°C) temperatures can destroy electrochemical sensors. This affects the measuring function and gas
leakage can occur. Install the device in rooms with temperatures between +5°C and max. 35°C. The
temperature in the control box must not exceed 50°C . Do not install the device in the hot exhaust air of
cogeneration units.
4.4.2 Ambient humidity
The relative humidity must be kept between 0 and 80% .
4.4.3 Installation height
The gas analysis system can be operated in areas which are located up to 2,000 mabove sea level
(normal height null, NHN).
4.4.4 Humidity and dust
The gas analysis system complies with IP54 protection class and is therefore dust- and splash-proof.
4.4.5 Measuring gas pressure
The pressure in the measuring lines must be at atmospheric pressure ±20 mbar (normal operation).
Pressure outside this range is not allowed because the sensors may be damaged and measured values
16

Product description
may be changed. With higher or lower pressure, corresponding measures must be taken (pressure
regulator, precision pressure regulator, available from Awite).
WARNING
The highest possible rated pressure is 100 mbar. In case of an error (e.g. precision pressure regulator
faulty), this must not be exceeded. This may result in leakage and consequent explosion. For higher
pressures, it is necessary to implement further safety measures as otherwise the safety of the gas
analysis system cannot be guaranteed.
4.4.6 Measuring gas, fresh air and exhaust air requirements
It has to be assured that no polluted flushing air or ambient air can be sucked in by the gas analysis
system and that the exhaust air hose remains free and unobstructed at all times.
CAUTION
Water, particles and dirt can clog pipes, sensors and valves. As a result, monitoring functions and thus
the measuring function can be impaired. Check the condensate traps daily.
When maintenance work is carried out on the gas pipe, the gas analysis system is to be switched off and
the ball valve at the measuring gas extraction point has to be closed.
WARNING
Work on the gas pipe may result in gas leakage. This creates a fire and explosion hazard. Switch off the
device during maintenance work and close the ball valve during gas sampling.
For AwiECO, the following applies: If there is a possibility of larger amounts of condensate in the
measuring gas pipe and if the condensate traps cannot be checked on a regular basis, an additional gas
cooler must be installed.
4.5 Hazards from gas
As the systems are used for the analysis of biogas and in a biogas system environment, the explosion
hazard has to be assessed prior to installation. A comprehensive risk assessment according to the
machinery directive is available from Awite. Technical data can be adapted to new technological advances
in the area of biogas by the manufacturer without any prior notice. Please contact Awite if you need
information about possible additions to this Instruction Manual and whether it is the current version.
17

Product description
4.5.1 Zone division
Inside the measuring gas pipes and inside the gas analysis system there are only very small amounts of
gas, whose volume is far below hazardous amounts. Therefore no Ex-zone obtains in this case. Whether
there is an Ex-zone around the gas analysis system or its pipes or not depends on the probability of
the occurrence of an explosive gas mixture. The following describes the actions to be taken to avoid an
explosive atmosphere, which could arise due to the gas analysis system. If the following instructions are
taken into account, there will be no Ex-zone inside the gas analysis system or the feed pipes either.
4.5.2 Flame or explosion propagation over gas bearing lines
With gases belonging to explosion group IIA (methane, biogas), tube and pipe connections with an internal
diameter of 4mm have the same effect as a deflagration arrester (tested length of 11cm). As the distance
from the hose to the relevant ignition sources (sensors) is always less than 50 times the hose diameter,
there is no need for separate deflagration arresters between the analysis device and gas-bearing lines with
larger cross-section and hazardous atmosphere with the explosion group IIA and up to zone 1. There is an
inspection report of an approved ATEX test centre verifying this.
When measuring hydrogen at higher concentrations1(special device); or with zone 0, a detonation arrester
must be installed as needed.
4.5.3 Leakage in the Measuring Gas Supply Line
A technically permanently leak-tight pipe is used. This is achieved by using a durable plastic tube or
stainless-steel pipe and corrosion resistant screw connections with resistant sealing. Components like
condensate traps that might be included in the measuring gas pipe also have screw connections. The
pipes are technically permanently leak tight up to the first valve, which can be used to shut off the pipe.
4.5.4 Gas volume
The pipes (< 5m) and sensors inside the gas analysis system contain less than 0.05 l of gas. No risk of
explosion results from this.
4.5.5 Leaks in the Gas Analysis System
Despite the slow reaction of methane with oxygen compared to other gases(55 bar*m/s compared to 550
or 1.415 bar*m/s with hydrogen and acetylene) at a similar maximum pressure (7.1 bar under normal
conditions), the danger for persons at a control box volume of 60 l cannot be completely eliminated if only
due to a deflagration, in the event that an explosive mixture would form inside due to a potentially occurring
tightness error and a subsequent ignition due to unfavourable conditions or an escape of the gas from the
gas analysis system.
1Biogas with up to 10% hydrogen in the flammable gas portion remains in explosion group IIA (source: BG ETEM/
BAM research project Hydrogen Mixtures).
18

Product description
The pipes inside are considered to be technically leak-tight. Due to the way they are constructed, some
sensors can only be used with plug connections which are secured with spring terminals. As an additional
safety measure, the high-quality methane sensor that is integrated in the gas analysis system is used to
track down possible leaks. In case of a leakage, the first valve will cut off the supply of measuring gas.
Each measuring channel is filled for a maximum of 120 s with measuring gas and is subsequently flushed
with air for at least 60 s . As the air for flushing is sucked out of the inside of the gas analysis system, the
composition of the air inside the device casing can be measured every 2 minutes . Fresh air flows from
outside into the device casing via a sintered metal frit (air filter). Upon detection of > 1.0% of methane(=
20% LEL),all actuators will be shut down and the valve V1 cuts off the supply of measuring gas. Optionally,
a potential-free contact is opened. Additionally, an error message is shown at the display. A potentially
explosive atmosphere could thus be prevented behind valve V1 despite leakages. The gas path up to V1
is made with pressure-resistant pipes and clamp ring screw connections in a technically permanently leak-
tight manner as described above.
For devices without methane sensor or with continuous methane measurement, safety is ensured by other
means (e.g. reduced number of potential leakage points, see risk assessment).
4.5.6 Release of Potentially Toxic and Harmful Gases
The device itself releases no gases, only the gases contained in the measuring gas can be released. In
accordance with its intended use, the device is used for the analysis of biogas and upgraded biogas and
the gases contained therein may be released correspondingly.
In normal operation and when used as intended, these gases are not released. The risk of exposure
hazards arising from release due to leaks is considered sufficiently low according to risk assessment.
19

Preparing the Gas Analysis System for Use
5 Preparing the Gas Analysis System for Use
WARNING
This is a complex measuring and control system. Incorrectly performed installation, electrical
installation, initial operation, or maintenance can lead to hazards and possibly even to death due to
electric shock or risk of explosion. The respective work on the gas analysis system may therefore
only be performed by trained professional personnel. The specialist personnel must have read and
understood the Instruction Manual and follow its instructions.
5.1 Transport and Storage
This gas analysis system must be protected against impermissible loads or damages by, for example,
humidity, vibration or shock. In the event of mechanical defects with electrical or electronic components,
the gas analysis system must not be put into operation. The same environmental conditions as those for
the operation apply to a possible storage of the gas analysis system before installation and commissioning.
5.2 Installation
The installation must be performed only by qualied personnel. They must be well familiar with the
contents of this manual and any other provided manuals and repair instructions as well as with the
safety instructions and specications on the devices. In addition, the applicable national, local and
system-specic regulations and provisions must be considered. An over-voltage protector must also
be provided for by the operator.
The dimensioning of the gas analysis system can be found Fig. 1 in the chapter 4.3 . Unused inlets on the
device casing have to be leak-proofed and closing elements have to be screwed in tightly. The device must
not be installed in unvented shafts or poorly ventilated rooms. There must be enough space around the
device so that the door of the casing can be opened and the device can be operated and controlled easily.
For devices with a cooler, there has to be enough space for the circulation of air around the heat sink (at
least 30cm).
CAUTION
In the event of a malfunction, the device can be brought into a safe state by de-energizing it. The device
therefore has to be installed in such a way that the main switch operation is not impeded.
20