DEGA 05L-2-AC-x-yL User manual

ISO 9001:2008
Quality Management Systems
Systéme de Qualité
www.sgs.com
Content
Page 2 / For your protection
Page 3 / Technical data and information
Page 4 / Operational and external conditions (CSN 33 2000-5-51)
Page 4 / Accessories
Page 5 / Terminology
Page 6 / Basic types
Page 9 / Description of the product
Page 11/ Installation, assembly and disassembly of the detector
Assembly of the detector
Disassembly of the detector
Sending the detector for the CALIBRATION
Page 16/ Operation of the compact detector
Page 17/ Functions of the compact detector
Switching on the detector
The idle mode
The gas alarm status
The„PEL“ status of the gas alarm
Failure
External gas detector (DEGA NBx-yL II)
Detection of critical temperatures
Detection of ooding
Connection to the emergency/solenoid valve
Status of the required service intervention (calibration)
Page 19/ Operation
Page 19/ Maintenance
Page 20/ General warranty terms and conditions
DEGA 05L-2-AC-x-yL
Compact Gas Detector
INSTRUCTION
MANUAL
Reproduction of this manual, or any part thereof, in any form, without the prior written permission of DEGA CZ s.r.o.
is prohibited.
DEGA CZ s.r.o. reserves the right to alter the specications of the hardware and software described in this manual at
any time and without prior notice.
DEGA CZ s.r.o. bears no liable for any damage resulting from the use of this device!

PAGE 2
FOR YOUR PROTECTION
Watch out for static electricity
Prior to installing or handling the product, ensure that you do not have an accumulated static charge. Touch a grounded
metal object to trigger the discharge of any accumulated electric charge. Otherwise the product could suer damage.
In the event of any failure of the equipment unplug it immediately
If you notice an unusual odour or smoke emanating from the product, unplug it from the mains and from all peripherals.
Continued operation could result in injury or property damage. After disconnecting the product deliver it to an authorised
service centre or the manufacturer for inspection.
Do not use the product in the vicinity of ammable gases or
in areas where there is a potential occurrence of these gases.
Do not use electronic equipment in the vicinity of ammable gases; this could potentially cause a re or an explosion.The
product is not designed for use in industrial or commercial spaces nor in„Ex“ hazardous areas.
Do not disassemble the product and ensure against its contact with water
Contact with internal components of the product may cause an electric shock. In the case of any failure refer the servicing
of the product exclusively to a certied service centre. Contact with water can create a short circuit in the product and
consequent damage to property or personal injury.
Use cables of the appropriate types
To ensure compliance with the parameters of the product, to connect the product to other devices or to the power supply
utilise exclusively the cables recommended and described in the Technical Data and Information section.
Risk of electric shocks
Prior to handling this product, ensure that it is not connected to the mains supply
Dispose of used products and transmitter sensors with respect for the environment
Transmitter sensors contain hazardous substances; dispose of them in accordance with the applicable regulations for the
protection of environment.
Use the transmitter only with the appropriate certied DEGA products
The device is certied and is technically and functionally suitable for authentic„DEGA“ accessories. In the event that the
device is utilised with other products the manufacturer shall not liable for any damages that this may cause.
Undertake regular functional checks and calibration of the transmitter
Carry out regular„CALIBRATION“ (i.e. setting the detection limits, checking the responsiveness of the sensor, checking the
functionality of the transmitter) and„OPERABILITY AND FUNCTIONAL CHECKS“ of the entire detection system (excitation
of the transmitters together with the subsequent optical and acoustic alarms, ventilator start-up, the shutdown of the
equipment, etc.). Calibration and operability and functional checks should be carried out only at certied service centres
with a valid certicate of competency, or by the manufacturer.
Note: The compact detector continuously and automatically checks its calibration period, i.e. the period of validity of its calibration.
Following the expiration of 12 months since the last calibration (i.e. the maximum calibration period) „ERROR“ LED begins to ash
on the detector and the detector must then be calibrated immediately at a certied service centre that holds a valid certicate of
competency or by the manufacturer. Following the expiration of 18 months from the most recent calibration, for security reasons the
detector switches into failure mode and the detector begins ashing long„ERROR“ ashes.

PAGE 3
TECHNICAL DATA AND INFORMATION
Supply voltage: 230 V/50 Hz
Input: 10 VA
Ingress protection: IP 43
Power-supply cable for the DEGA05 compact detector: 3x1,5mm2
Cable for connecting the DEGA ZC II ood sensor: 4x1mm2 (max.100m) or UTP cat. 5e
Cable for connecting the DEGA NBx-yL II external transmitter: 3x1mm2 (max. 600 m)
3x1,5mm2 (max. 1100 m)
Note: In case of the need to connecting transmitters to a compact
detector over a greater distance, please contact the manufacturer.
Output: 5x relay- a potential-free switching contact
Relay contact ampacity: resistance load: 8 A / 250 V/50Hz
8 A / 30 VDC
inductive load: 1,6 A / 30 VDC
Dimensions: (W x H x D) 225 x125 x57 mm
Weight: 0,6 kg
Degree of accuracy: 2,5
Type of sensor: catalytic, electrochemical, infrared, semiconductor
Expected operational life of the sensor in a clean environment:
catalytic (3-6 years)
electrochemical (1-3 years)
infrared (at least 5 years or more)
semiconductor (3-6 years)
Response time (T90):
DEGA05-2-AC-x-EL max. 180 seconds (in accordance with the type of sensor)
DEGA05-2-AC-x-CL max. 20 seconds
DEGA05-2-AC-x-IL max. 15 seconds
DEGA05-2-AC-x-SL max. 30 seconds
Warm-up time:
DEGA05-2-AC-x-EL max. 1 minute
DEGA05-2-AC-x-CL 30 seconds
DEGA05-2-AC-x-IL 20 seconds
DEGA05-2-AC-x-SL max. 3 minutes
Stabilisation period:
DEGA05-2-AC-x-EL max. 2 hours (5 days when not supplying power)
DEGA05-2-AC-x-CL max. 1 hours (5 days when not supplying power)
DEGA05-2-AC-x-IL max. 2 hours (5 days when not supplying power)
DEGA05-2-AC-x-SL max. 6 hours (5 days when not supplying power)
Shelf life: up to one year in an environment that does not contain any corrosive substances at temperature from -10 °C to +40 °C
with relative humidity of up to 90% at an atmospheric pressure between 86 and 108 kPa.

PAGE 4
OPERATIONAL AND EXTERNAL CONDITIONS ( CSN 33 2000-5-51 )
ACCESSORIES
Operating temperature range: -20°C to +60°C
Relative humidity of the ambient air: max.95%
Altitude: AC1
Air pressure: 86 – 108 kPa
The oxygen content in the air: 18% – 21%
The occurrence of humidity: AD1
(AD2, with the exception of direction perpendicular to the sensor)
The incidence of solid foreign bodies: AE1
The occurrence of corrosive or polluting substances: AF3, in direction towards the transmitter AF1
Vibration: AH1
The types of materials processed or stored: AR2, max. 2,0 m/s
(a ow directed towards the transmitter sensor is not acceptable)
Working environment: BE1 – non-explosive atmosphere
BNV (CSN EN 60079–10)
The transmitter is not intended to be used for detection and sensing in industrial and commercial areas requiring ATEX certication
nor for areas with potentially explosive atmospheres („Ex“). For these areas, we recommend transmitters of the DEGA NSX type.
DEGA NBx-yL II - External additional gas transmitter
One additional transmitter of any type from the DEGA NBX-yL II product line can be connected to the compact detector.
DEGA Zc II - External ood sensor
The sensor is located on the oor in the location of the application and reacts to the ooding of the contacts with water.
DEGA05-Tc - Internal sensor for the critical temperature
The sensor for the critical temperature is located directly inside the detector.
The factory setting of the alarm for the critical temperature: 45 °C
(in accordance with CSN 07 0703 - Boiler rooms with gaseous fuels)
Note: The setting of the alarm value for the critical temperature can be altered in accordance with the customer’s requirements; see
„Operation of the compact detector“
DEGA05-V - Circuit for controlling the emergency valves
When using the detector for switching on an emergency valve (e.g. the DEGA HV-DNX) it is necessary to order this circuit with the
basic version.

PAGE 5
TERMINOLOGY
The DEGA05-2-AC-x-yL compact gas detector
is located in the area monitored and is designed to protect the health and property of individuals in an environment in which there
exists the possibility of the occurrence of a critical situation based on the accumulation of ammable or toxic gases. The detector
includes a sensor that reads the current value of the gas concentration in the ambient air and shows this value on the display. This
also provides the possibility for optical and acoustic signalling and for switching relay contacts that correspond to the specic
status.
LEL: Lower Explosive Limit of gas - the lowest volume concentration of gas in the atmosphere at which an explosion might occur
PEL: Permissible Exposure Limit – the maximum average concentration of gases to which an employee may be exposed during one
shift (typically of 8 or 12 hours)
The Transmitter: is a part of the detector that is placed in the area monitored and reports the detected concentration of the media
as an output signal
The Sensor: is a part of the transmitter that reacts to the presence of gas (vapour) in the air.
The DEGA 05L-2-AC-x-yL detector is available with the following sensors:
(whereby x= the symbol for a specic gas, y= the symbol for the type of sensor)
DEGA05-2-AC-x-EL with an electrochemical sensor
This operates on the principle of measurement of the change in the electrical parameters of electrodes placed in electrolyte, due to
the redox reaction of detected gas on their surface. These sensors have a favourable selectivity and the capacity to detect very low
concentrations of gases. In the DEGA systems they are utilised primarily for the detection of toxic gases.
DEGA05-2-AC-x-CL with a catalytic sensor (Pelistor)
These work on the principle of catalytic combustion – the gas concentration is measured in accordance with the amount of heat
released during a controlled combustion reaction. The reaction is prompted by a suitable temperature and the presence of a
catalyst. These sensors can be used for the detection of a wide range of combustible gases. The sensors are characterised by their
fast response, long life and high degree of stability. For their proper functioning they require at least 10% of the oxygen in the air.
In an environment containing corrosive substances (alkaline and/or acidic compounds, silicon, sulphur, lead, etc.) the degradation
of the sensor is accelerated.
DEGA05-2-AC-x-IL with an infrared sensor (IR)
The highest-quality detecting method, which works on the principle of infrared spectroscopy. These sensors excel in the high
level of their selectivity and their resistance in environments containing corrosive substances and, under ideal conditions, their
theoretically unlimited operating life.
DEGA05-2-AC-x-SL with a semiconductor sensor
The least expensive method of sensing. They work on the principle of the measurement of the change in the electrical conductivity
of semiconductors that occurs in the event of a change in the concentration of the gas detected. Its advantages are its long
operating life when it is used in a clean environment and also the wide range of models available for dierent types of gases and
vapours. Its disadvantages are its low degree of selectivity (a lesser ability to distinguish between the dierent types of gases in the
mixture) and in environments containing corrosive substances (alkaline and acidic compounds, silicones, sulphur compounds, etc.)
an accelerated degradation of the sensor takes place.

PAGE 6
BASIC TYPES
Identication system of the transmitter: DEGA 05L
Gas transmitter DEGA 05L-2-AC-x-yL
The product type (DEGA 05L)
2-level detection
Power supply 230 V AC
The type of gas detected
A type of sensor with a linear output
DEGA05L-2-AC-x-CL (Catalytic sensor)
The type of sensor Detected gas Measuring range Standard alarm setting on the controller
DEGA05-2-AC-M-CL
Methane (CH4)
/ Natural Gas (CH4)
/ CNG (CH4)
/ Biogas (CH4)
0 – 100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-P-CL
Butane (C4H10)
/ LPG (C4H10)
/ Propane-butane (C4H10)
0 – 100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-H-CL Hydrogen (H2) 0-100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-A-CL Amonia (NH3) 0-100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-B-CL Gasoline 0-100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-L-CL
Other ammable and explosive gases
and vapours, in accordance with the
selectivity of the sensor
0-100% LEL level 1: 10% LEL, level 2: 20% LEL
Note: LEL - Lower Explosion Limit
Alarm settings on the controller can be freely selected (within the measuring range) in accordance with the customer’s requirements
DEGA05L-2-AC-x-CL (Semiconductor sensor)
The type of sensor Detected gas Measuring range Standard alarm setting on the controller
DEGA05-2-AC-C-SL Carbon monoxide (CO) 0 - 10.000 ppm level 1: 80 ppm, level 2: 130 ppm
DEGA05-2-AC-M-SL
Methane (CH4)
/ Natural Gas (CH4)
/ CNG (CH4)
/ Biogas (CH4)
0 – 100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-P-SL
Butane (C4H10)
/ LPG (C4H10)
/ Propane-butane (C4H10)
0 – 100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-A-SL Amonia (NH3) 0 -1.000 ppm
(accuracy +/- 50ppm) level 1: 300ppm, level 2: 400 ppm
DEGA05-2-AC-B-SL Gasoline 0-100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-F-SL Freon 100 – 600 ppm level 1: 300ppm, level 2: 600ppm
DEGA05-2-AC-R-SL
Refrigerants:
R401A, R404A, R407C, R32, R410A,
R12, R22
0 – 20.000 ppm In accordance with the type of refrigerant
DEGA05-2-AC-HFO-SL Refrigerant: HFO-1234yf; R1234yf;
2,3,3,3-Tetrauoropropylene 0 – 20.000 ppm level 1: 10 ppm, level 2: 20 ppm
DEGA05-2-AC-H-SL Hydrogen (H2) 0-100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-Y-SL Acetylene (C2H2) 0-100% LEL level 1: 10% LEL, level 2: 20% LEL
DEGA05-2-AC-L-SL
Other ammable and explosive gases
and vapours, in accordance with the
selectivity of the sensor
0-100% LEL
(0 – 1% vol.) level 1: 10% LEL, level 2: 20% LEL
Note: LEL - Lower Explosion Limit
Alarm settings on the controller can be freely selected (within the measuring range) in accordance with the customer’s requirements

PAGE 7
DEGA05L-2-AC-x-EL (Electrochemical sensor)
The type of sensor Detected gas Measuring range Standard alarm setting on the controller
DEGA05-2-AC-C-EL Carbon monoxide (CO) 0 - 300 ppm
(0-1.000ppm)
level 1: 45 ppm, level 2: 130 ppm,
ALARM„PEL“: in accordance with CSN 50291: 120min./30ppm
Application: Detection in residential buildings
If required the„PEL“ ALARM can also be set:
a) in accordance with CSN 73 6058: 30min/87 ppm
Application: Underground Garages
b) in accordance with Government Regulation No. 321/2007:
8 hours/26 ppm
Application: The working environment of employees
DEGA05-2-AC-A-EL Amonia (NH3) 0-50ppm
(0-1000ppm)
level 1: 18 ppm, level 2: 47 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./ 20 ppm
DEGA05-2-AC-CL-EL Chlorine (Cl2) 0 - 20 ppm
level 1: 1 ppm, level 2: 3 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./0,2 ppm
NPK-P: 0,516 ppm
DEGA05-2-AC-O-EL Oxygen (O2) 0-25% vol.
level 1: 18% vol., level 2:15% vol.
If required the„PEL“ ALARM can also be set:
1 st. 23% vol., level 2:25% vol.
DEGA05-2-AC-O3-EL Ozone (O3) 0-5 ppm
(0 - 100 ppm)
level 1: 0,1 ppm, level 2: 0,3 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./0,05 ppm
NPK-P: 01018 ppm
DEGA05-2-AC-HCL-EL Hydrogen chloride (HCl) 0 - 20 ppm
level 1: 7 ppm, level 2: 9,3 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./5,43 ppm
DEGA05-2-AC-H2S-EL Hydrogen sulde (H2S)
0 - 50 ppm
(0-200ppm)
(0-2000ppm)
level 1: 10 ppm, level 2: 13 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./7,1 ppm
DEGA05-2-AC-NO2-EL Nitrogen dioxide (NO2) 0 - 20 ppm
(0 - 1 00 ppm)
level 1: 8 ppm, level 2: 10 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./4,94 ppm
DEGA05-2-AC-NO-EL Nitric oxide (NO) 0 - 250 ppm
(0 - 1 000 ppm)
level 1: 7 ppm, level 2: 10 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007:8hod./7,57 ppm
DEGA05-2-AC-SO2-EL Sulfur dioxide (SO2) 0 - 20 ppm
level 1: 2,5 ppm, level 2: 3,5 ppm
The„PEL“ ALARM in accordance with Government Regulation
No. 321/2007: 8hod./1,91 ppm
DEGA05-2-AC-CH2O-EL Formaldehyde (CH2O) 0 - 10 ppm
(0 - 2000 ppm) level 1: 0,3 ppm, level 2: 0,7 ppm
DEGA05-2-AC-C2H4-EL Ethene (Ethylene) (C2H4) 0 - 10 ppm
(0-1 500 ppm) level 1: 7 ppm, level 2: 10 ppm
DEGA05-2-AC-C2H4O-EL Ethylenoxide (oxirane) (C2H4O)
Acetaldehyd, Vinyl alcohol (ethenol) 0 – 10 ppm level 1: 0,8 ppm, level 2: 1,5 ppm
DEGA05-2-AC-H-EL Hydrogen (H2) 0 - 1000 ppm
(0-4000ppm) level 1: 200 ppm, level 2: 400 ppm
DEGA05-2-AC-HCN-EL Hydrogen cyanide (HCN) 0-50ppm
(0-100ppm) level 1: 5 ppm, level 2: 8,3 ppm
DEGA05-2-AC-PH3-EL Phosphane /phospine (PH3) 0 - 5 ppm
(0 -20 ppm) level 1: 0,1 ppm, level 2: 0,2 ppm
DEGA05-2-AC-SIH4-EL Silane (SiH4) 0 - 50 ppm level 1: 3 ppm, level 2: 5 ppm
DEGA05-2-AC-CLO2-EL Chlorine dioxide (ClO2) 0-1 ppm
(0-50ppm) level 1: 0,1 ppm, level 2: 0,2 ppm
DEGA05-2-AC-BR2-EL Bromine (Br2) 0-20ppm level 1: 0,1 ppm, level 2: 0,2 ppm
DEGA05-2-AC-HBR-EL Hydrobromic acid (HBr) 0-20ppm level 1: 8 ppm, level 2: 9,3 ppm
DEGA05-2-AC-L-EL
Other chemical substances, in
accordance with the customer’s
requirements
In accordance with
the type of sensor In accordance with the chemical substance
Note: LEL - Lower Explosion Limit
Alarm settings on the controller can be freely selected (within the measuring range) in accordance with the customer’s requirements

PAGE 8
DEGA05L-2-AC-x-IL (Infrared sensor)
The type of sensor Detected gas Measuring range Standard alarm setting on the controller
DEGA05-2-AC-CO2-IL Carbon Dioxide (CO2)
/Biogas (CO2)
0 - 5 % vol.
(0-100 % vol.) level 1: 1,0%, level 2: 2,5%
DEGA05-2-AC-M-IL
Methane (CH4)
/ Natural Gas (CH4)
/ CNG (CH4)
/ Biogas (CH4)
0 – 100% LEL
(0-100% vol.) level 1: 10% LEL, level 2:20% LEL
DEGA05-2-AC-PB-IL
Butane (C4H10)
/ LPG (C4H10)
/ Propane-butane (C4H10)
0 – 100% LEL
(0-100% vol.) level 1: 10% LEL, level 2:20% LEL
DEGA05-2-AC-PP-IL Propane (C3H8) 0 – 100% LEL
(0-100% vol.) level 1: 10% LEL, level 2:20% LEL
DEGA05-2-AC-B-IL Gasoline 0-100% LEL
(0-100% vol.) level 1: 10% LEL, level 2:20% LEL
DEGA05-2-AC-N2O-IL Nitrous oxide (N2O) 0 – 1% vol. level 1: 0,5% vol., level 2:1% vol.
DEGA05-2-AC-L-IL
Other ammable and explosive gases
and vapours, in accordance with the
selectivity of the sensor
0-100% LEL
(0-100% vol.) level 1: 10% LEL, level 2:20% LEL
Note: „PEL“ ALARM: Permissible Exposure Limit (PEL) of the chemical substance,
i.e. the maximum permissible value of the time-weighted average (TWA) of the concentration of the gas in air
LEL - Lower Explosion Limit

PAGE 9
DESCRIPTION OF THE PRODUCT
1The upper part containing the electronics
and the sensor
3The green indicator -„POWER“
(LED, signalling the power status)
5The red indicator -„ALARM“
(LED, alarm)
7 Reset button for the acoustic alarm
9 Piezo-buzzer
11 DEGA KD (the mounting plate)
2 The LCD display
4The yellow indicator -„ERROR“
(LED, signalling a fault condition of the transmitter)
6 The measurement channel switch button
8Air holes for the access of the gas to the sensor of the
detector
10 Spanner for the assembly and disassembly of the detector
(It is necessary to remove it from the mounting plate prior to assembly!)
12 Openings for mounting onto the wall

PAGE 10
LCD Display:
1Warning concerning the requisite calibration
3The transmitter currently displayed ***
5The type of gas or substance detected
7 Icon for failure/required service intervention
9 Alarm/error icon for the critical temperature *
2 Alarm/error icon for ooding*
4The level of the gas detection alarm
6 Icon for the exceeding of the maximum average
concentration - TWA **
8Units in which the measuring is conducted
10 Concentration displayed
* This function is activated only in the event of connecting an external DEGA05-Tc temperature sensor / an external DEGA ZcII ood sensor.
** This function is activated only in the event of the detection of toxic gases (e.g. carbon monoxide (CO) etc.).
*** This function is activated only in the event of the connection and programming of an additional transmitter