Installation manual detector and controller Code no. 20711062 Page 1/30 CONTENTS Controller... 2 Function of the Relays... 2 Gas Detectors... 2 Cabling... 4 Mechanical Installation of the gas detectors... 6 SCAN20 Series Gas Detection Controllers... 8 SCAN200E Controller... 11 DGTec2 Gas Detector... 13 DGTm3 Gas Detector... 16 DGTi2 Gas Detector... 18 DGTt2 Gas Detector... 20 DGTk2 Gas Detector... 24 MAINTENANCE AND CALIBRATION... 26 RECYCLING... 27 PUBLISHER Detector Oy, Telekatu 8, 20360 Turku, Finland Telephone +358 207 756 480, Email detector@detector.fi Detector Oy 2017 Copying contents of this booklet or handing over to third party is strictly forbidden without written permission from Detector Oy. All efforts have been made to ensure the content of this booklet to be correct, however Detector Oy does not take responsibility for damage caused by errors or missing information in this booklet. Technical specifications may change without prior notice.
Code no. 20711062 Installation manual detector and controller Page 2/30 INSTALLATION IN GENERAL Controller The controller shall preferable be installed at a central place, where personnel is present at all times, i.e. in the control room. The controller shall be protected from dirt and water coming along the wall or the mounting plate. The controller shall not be installed in the area under monitoring, e.g. in a refrigeration compressor room. In constraining situations, as minimum requirement gas alarming sound and/or flashing equipment shall be installed at the entrance of the room. Do not install any third-party components or devices on the gas detection controller. Use of uninterrupted power source is recommended to maintain monitoring during power outage. A map containing all gas detector and alarm device locations shall be available near the gas detection controller. It is also advisable to provide any site-specific instructions for alarm events. Gas detection controller and gas detectors require regular maintenance. The controller and detectors shall be maintained at the same time to ensure reliable operation of the system. It is recommended to test any external alarm functionality during the maintenance. Function of the Relays Ensure the compatibility of the load and relays beforehand. The relays in the AVACO SYSTEMS products are designed for resistive load. When connecting capacitive / inductive loads, e.g. flashes or contactors, the load must be adapted appropriate to the relays. In most cases this can be done by connecting a metal oxide varistor or an RC filter parallel to the relay tips. Apply relay controls only after successful system test. Gas Detectors The gas detectors need regular maintenance. The accessibility has to be taken into account when choosing the installation place, if necessary, maintenance platforms has to be arranged. Do not expose gas detectors to strong infrared radiation or steam clouds. Gas detectors are to be installed as late as possible during construction work to avoid any damage due to welding and painting. However, installation and stabilization must be carried out before using any gases or liquids the detectors are to measure. Stabilization time is 2 to 4 days or more depending on sensor type and temperature unless otherwise noted. Bypass all relay controls during the stabilization.
Installation manual detector and controller Code no. 20711062 Page 3/30 To protect the gas detector from dirt and moisture the casing has to be installed with the sensor protection cover directed downwards. Also, the cabling shall be done from below for the same reasons. When the cabling in constraining situations is done from above, the gland has to be sealed properly. During gas detector installation or when making electrical changes into the gas detection system, the power must be disconnected to prevent damage. The gas detector shall be assembled near to a presumptive leakage place to achieve a fast response, however, the density of the gas shall be taken into account when defining the assembly height. when monitoring gases, which are heavier than air the gas detectors shall be assembled at a height of 30 50 cm from the floor level. Thus, there is enough space between the gas detector and the floor for the maintenance of the gas detector and for the cleaning of the floor. If there are possibilities of mechanical damage, a protection shield shall be assembled around the sensor. when monitoring gases, which are lighter than air the gas detectors shall be assembled at or near to the ceiling. when the density for the measured gas is approximately the same as for air the gas detectors shall be installed at the breathing height. Install splash protection in areas where detectors are exposed to water. (see page 7, consult manufacturer for more information) A heated enclosure may be required when using the detector outside of normal operating temperature and/or humidity. The detectors are meant for alarm limit based detection of gases and solvents. These devices require regular maintenance and testing to ensure correct operation. Full calibration must be done at least once a year and testing more often. On-site safety statement will define the correct test interval. Test gas pressure at detector gas inlet shall be within ±10% of nominal air pressure. Calibration and test gas concentration must not exceed the range of the detector. In case of flammable gas the concentration must be 0 50 %LEL. Excess gas concentration may damage the sensor element. Make sure the gas flow at the calibration adapter is unobstructed. Contact your dealer for most of calibration gases. In unclear situations regarding the installation of the gas detectors, kindly contact DETECTOR Oy, or the local authorities for occupational health and safety or the fire brigade.
Code no. 20711062 Installation manual detector and controller Page 4/30 Cabling The gas detectors are cabled to the controllers as own circuits, by e.g. JAMAK 2x(2+1)x0.5 mm 2 or by an equivalent cable. At ATEX sites standard EN 60079-14 will specify the cable type. The type of the gas detector defines the number of wires in the cable. If the cable is exposed for vandalism or mechanical stress, an armoured cable shall be used. Signal cable shields are grounded only from the controller to prevent ground current loops. If the gas detector casing is not earth connected, the signal cable shield shall be connected to the casing. When using other than recommended cable, correct operation of the system is not guaranteed. The type of the gas detector, the supply voltage and the cable cross-section area defines the maximum cable length. It is recommended to use the following formula for calculating the maximum cable length, when the distance is over 300 m. The formula is valid for AVACO SYSTEMS gas detectors, when the cable cross section area, the maximum allowed loss of voltage, the specific resistance of the used cable material and the power consumption of the gas detector are known. Wire area [mm 2 ] * Voltage Loss [V] Cable [m]= 2 * Detector Current [A] * Wire Resistance Factor [ Ω m * mm2 ] Formula 1, calculation of the maximum cable length. Voltage Loss: The minimum required voltage for the gas detector is subtracted from the supply voltage; the result is the biggest allowed loss of voltage in the cable, which is used in the formula as voltage loss. Detector Current: The current consumption in Ampere written on the equipment plate or in the inspection sheet for the equipment. Wire Area: The wire cross section area in square millimetres. Wire Resistance Factor: The specific resistance for the wire material, for copper 0.0172 Ω/m*mm 2. The result for cable length is expressed in meters. For example, a wire with a maximum voltage loss of 10V, cross section area of 0.8 mm 2 and with gas detector current consumption of 205 ma, the maximum cable length is calculated to be approximately 1 100 m.
Installation manual detector and controller Code no. 20711062 Page 5/30 Figure 1, Recommended cabling for 2-wire connection when gas detector casing is isolated from surface using non conducting plate. Figure 2, Alternative cabling for 2-wire connection. Figure 3, Recommended cabling for 4-wire connection when gas detector casing is isolated from surface using non conducting plate.
Code no. 20711062 Installation manual detector and controller Page 6/30 Figure 4, Alternative cabling for 4-wire connection. Mechanical Installation of the gas detectors All gas detectors are enclosed in IP54 metallic casing and delivered with insulating mounting base. The sensor, sensor cover and electronics inside the case varies according the model and features. Earth bonding connector is found at the bottom part of the casing. Install cable entry at downwards position to prevent water from entering the casing. Do not remove the instrument label. Stainless steel double skin weather enclosures are available (see page 7). The protector prevents, e.g. snow, rain, water from cleaning devices. The splash protector parts include the bottom plate, top plate, rain guard and pipe mount kit. The parts are separately available to suite the needs on-site. Figure 5, Gas detector casing dimensions and attachment holes.
Installation manual detector and controller Code no. 20711062 Page 7/30 Figure 6, Installation position for ceiling and wall mounted versions. Sensor cover is pointing downwards. Figure 7, Duct mounted version includes 132 mm long probe and mounting ring. 168 mm 149 mm 255 mm 142 mm Figure 8, Stainless steel double skin weather enclosure with rain cover (H225 x W168 x D149 mm), image without pipe mounting kit.
Code no. 20711062 Installation manual detector and controller Page 8/30 SCAN20 Series Gas Detection Controllers Inputs: 2 or 4 inputs, current signal (0)4 20 ma Outputs: 7 relay contacts, 230 VAC 1.0 A / 24 VDC 1.0 A to for resistive load. 2 freely scalable 4 20 ma standard current outputs (option). RS485, typical industrial protocols (option). Alarm information as SMS message via external GSM modem (option). Display: White back lighted 20x4 character LCD display. Channel specific indicators for alarm levels I, II, and III. Common indicators for alarms off, emergency shutdown of solenoid valve and fault alarm. Enclosure: ABS-plastic. Equipped with external mounting brackets for easy wall installation. Dimensions: 259 x 237 x 97 mm (w x h x d) excluding cable glands Weight: 1550 g Degree of protection: IP66 Operating voltage: 230 VAC / 24 VDC Operating temperature: -10 45ºC Operating humidity: 10 90 % RH, non-condensing Note: The controller is delivered with complete and project specific installation documents.
Installation manual detector and controller Code no. 20711062 Page 9/30 Figure 9, SCAN20 gas detection controller general view and mounting dimensions. The photo is missing the bottom cable entry.
Code no. 20711062 Installation manual detector and controller Page 10/30 Figure 10, SCAN20 gas detection controller terminal blocks found on the circuit board (version E or later). NOTE: Connections described here are not connected in all SCAN20 models.
Installation manual detector and controller Code no. 20711062 Page 11/30 SCAN200E Controller Construction: Installation: Inputs: Outputs: Display: Operating Voltage: Operating Temperature: Operating Humidity: Note: Controller consisting of CPU unit and input and relay modules. Possibility to connect subcontrollers equipped with input and relay modules to the controller. Maximum distance between the controller unit and sub-controllers using RS485 is one kilometre. In a 19 rack or in a metal or PC enclosure, fixed to the wall by screws. 8 64 pcs, in 8 input units, standard current signal 0(4) 20mA, voltage signals 0(2) 10V and direct measuring. From 8 to 128 relays in modules of 8 relays. Relay contacts for 230 VAC 1 A resistive load. RS-232 for modem/maintenance. The optional GSM modem enables alarm SMS for up to 3 different cell phone numbers. RS-485 for Modbus/Profibus (optional). 240 x 128 pixel back lighted LCD display, indicators for the alarm levels I, II, III and for malfunction 230 VAC / 24 VDC 0 50 C 10 90 % RH, non-condensing The controller is delivered with complete and project specific installation documents. Figure 11, SCAN200E Controller general view (R-model, 9U).
Code no. 20711062 Installation manual detector and controller Page 12/30 Figure 12, SCAN200E Controller relay and A/D modules.
Installation manual detector and controller Code no. 20711062 Page 13/30 DGTec2 Gas Detector Sensor Type: Output Signal: Operating Voltage: Max. Power Consumption: Cabling: Typical Sensor Life in clean air: Typical T90 Response: Operating Temperature: Operating Humidity: Degree of Protection: Weight: Note: Electrochemical 4 20 ma, linear response see figures, regulated 0.9 W 2-wire connection, e.g. JAMAK 2x(2+1)x0.5 mm 2 1 3 years depending on the type of sensor 10 150 seconds depending on the type of sensor according to the cell in use, ask manufacturer O2 sensor 0 99% RH, for other sensors 15 90% RH, non-condensing IP54 450 g The calibration is done by using the handheld calibration device (IRC) via infrared link. Therefore the infrared lens of the device must be clearly visible. If ambient air pressure differs more than 5% from normal atmospheric, the detector shall be recalibrated at the installation site. Figure 13, DGTec2 gas detector general view. The model and the size of the sensor protection depend on the type of the gas specific sensor. Duct mounted DGTec2d is also available.
Code no. 20711062 Installation manual detector and controller Page 14/30 Figure 14, DGTec2 connections and layout on the circuit board. The circuit board version depends on the target gas. Figure 15, DGTec2 oxygen/o2 connections and layout on the circuit board.
Voltage [V] Installation manual detector and controller Code no. 20711062 Page 15/30 DGTec2 maximum load resistance vs. operating voltage on LO and HI selections 24 22 20 18 16 14 12 10 0 100 200 300 400 500 Resistance [Ω] Figure 16, DGTec2 operating voltage and maximum load resistance.
Code no. 20711062 Installation manual detector and controller Page 16/30 DGTm3 Gas Detector Sensor Type: Output Signals: Operating Voltage: Max. Power Consumption: Cabling: Typical Sensor Life in clean air: Typical T90 Response: Operating Temperature: Operating Humidity: Degree of Protection: Weight: Note: Electrochemical 4 20 ma, linear response see figures, regulated 0.9 W 2-wire connection, e.g. JAMAK 2x(2+1)x0.5 mm 2 5 years < 30 seconds -10 +50 C, continuous -20 +50 C, intermittent 10 95% RH, non-condensing IP54 350 g The calibration is done by using the handheld calibration device (IRC) via infrared link. Therefore the infrared lens of the device must be clearly visible. If ambient air pressure differs more than 5% from normal atmospheric, the detector shall be recalibrated at the installation site. Figure 17, DGTm3 gas detector general view.
Voltage [V] Installation manual detector and controller Code no. 20711062 Page 17/30 Figure 18, DGTm3 connections and layout on the circuit board. DGTm3 maximum load resistance vs. operating voltage on LO and HI selections 24 22 20 18 16 14 12 10 0 100 200 300 400 500 Resistance [Ω] Figure 19, DGTm3 operating voltage and maximum load resistance.
Code no. 20711062 Installation manual detector and controller Page 18/30 DGTi2 Gas Detector Sensor Type: NDIR Infrared Sensor Output Signals: 4 20 ma, linear response Operating Voltage: 24 VDC ±20 %, regulated Max. Power Consumption: 3.0 W Cabling: 4-wire connection, e.g. JAMAK 2x(2+1)x0.5 mm 2 Typical Sensor Life in clean air: 5 years Typical T90 Response: < 60 seconds Operating Temperature: -20 +50 C Operating Humidity: 0 95% RH, non-condensing Degree of Protection: IP54 Weight: 450 g Note: The calibration is done by using the handheld calibration device (IRC) via infrared link. Therefore the infrared lens of the device must be clearly visible. If ambient air pressure differs more than 5% from normal atmospheric, the detector shall be recalibrated at the installation site. Indication lights: Constant green: Normal operation mode. Constant yellow: Sensor failure. Blinking red: Gas alarm. Blinking will stop when the gas concentration is lower than the alarm limit.
Installation manual detector and controller Code no. 20711062 Page 19/30 Figure 20, DGTi2 gas detector general view. Figure 21, DGTi2 connections and layout on the circuit board. Buzzer and relay on DGTi2r.
Code no. 20711062 Installation manual detector and controller Page 20/30 DGTt2 Gas Detector Sensor Type: Solid-State Output Signals: (0)4 20 ma or (0)2 10 V linear or logarithmic response. NOTIFY ON ORDER! DGTt2r includes a relay 24 V / 1 A for resistive load, additionally a buzzer and acknowledge button for buzzer. Operating Voltage: 10 36 VDC (when only relay output used), 18 36 VDC (when current output used) or 12 24 VAC Max. Power Consumption: 4.0 W Cabling: 4-wire connection, e.g. JAMAK 2x(2+1)x0.5 mm 2 Typical Sensor Life: 3 5 years Operating Temperature: -20 +40 C reduced sensitivity -30 +40 C Operating Humidity: 15 90 % RH, non-condensing Degree of Protection: IP54 Weight: 390 g Note: The calibration is done by using the handheld calibration device (IRC) via infrared link. Therefore the infrared lens of the device must be clearly visible. Indication lights: Constant green: Normal operation mode. Constant red: Sensor failure. Blinking red: Gas alarm. Blinking will stop when the gas concentration is lower than the alarm limit.
Installation manual detector and controller Code no. 20711062 Page 21/30 Figure 22, DGTt2 gas detector general view (-w, wall mounted). The DGTt2 gas detector can also be mounted to the ceiling (model -c) or to a duct (model -d). Figure 23, DGTt2 connections and layout on the circuit board. NOTE: Availability of connections depends on the DGTt2 model.
Code no. 20711062 Installation manual detector and controller Page 22/30 Figure 24, DGTt2r alarm and delay settings. Figure 25, DGTt2r alarm and delay settings.
Installation manual detector and controller Code no. 20711062 Page 23/30 Figure 26, DGTt2 jumpers on the circuit board.
Code no. 20711062 Installation manual detector and controller Page 24/30 DGTk2 Gas Detector Sensor Type: Catalytic Output Signals: 4 20 ma, linear response DGTk2r includes a relay 24 V / 1 A for resistive load, additionally a buzzer and acknowledge button for buzzer. Activation delay is set at factory, see production documents. Operating Voltage: 24 VDC ±20%, regulated Max. Power Consumption: 4.0 W Cabling: 4-wire connection, e.g. JAMAK 2x(2+1)x0.5 mm 2 Typical T90 Response: According to IEC 60079-29-1 Operating Temperature: -40 +65 C Operating Humidity: 0 95% RH, non-condensing Degree of Protection: IP54 Weight: 620 g Note: The calibration is done by using the handheld calibration device (IRC) via infrared link. Therefore the infrared lens of the device must be clearly visible. Calibration and test gas concentration must not exceed the range of the detector nor 50 % LEL. When exposed to a shock e.g. a drop, DGTk2 must be recalibrated. The sensor element shall be oriented downwards. Indication lights: Constant green: Normal operation mode. Constant red: Sensor failure. Blinking red: Gas alarm. Blinking will stop when the gas concentration is lower than the alarm limit.
Installation manual detector and controller Code no. 20711062 Page 25/30 Figure 27, DGTk2 gas detector general view. Figure 28, DGTk2 connections and layout on the circuit board. NOTE: Availability of connections depends on the DGTk2 model.
Code no. 20711062 Installation manual detector and controller Page 26/30 MAINTENANCE AND CALIBRATION The gas detectors and controllers are tested and calibrated by the manufacturer. Installation instructions and calibration reports are included. Gas detection equipment requires regular maintenance to ensure appropriate operation. Consider the future maintenance at the time of installation. We will help you to plan and conduct maintenance planning and calibration. Maintenance contracts are custom made to suite individual needs. We also conduct installation inspections. Controller and detector attachment, wiring and settings will be checked. Detectors will be tested with calibration gas to ensure that everything from sensor element to external alarms are functioning properly. End users receive introduction to using the system. Inspection report contains any possible correction needs. Installation inspection and any other trainings are planned according to customer needs. Contact manufacturer or distributor regarding any maintenance needs. DETECTOR OY Telekatu 8 FI-20360 TURKU FINLAND Tel. +358 207 756 480 detector@detector.fi www.detector.fi
Installation manual detector and controller Code no. 20711062 Page 27/30 RECYCLING Please follow the instructions for recycling the gas detectors: - Enclosures to metal recycling - Printed Circuit Boards to electronic recycling - Catalytic, semiconductor and infrared sensors to metal recycling - Electrochemical sensors to hazardous waste - Polymer parts to burnable waste Do not dispose the detectors with residential waste. Ask Detector Oy for further information. DETECTOR OY Telekatu 8 FI-20360 TURKU FINLAND Tel. +358 207 756 480 detector@detector.fi www.detector.fi
Code no. 20711062 Installation manual detector and controller Page 28/30 Figure 29, Declaration of conformity for DGT series gas detectors.
Installation manual detector and controller Code no. 20711062 Page 29/30 Figure 30, Declaration of conformity for SCAN series gas detection controllers.
Code no. 20711062 Installation manual detector and controller Page 30/30 Figure 31, ISO 9001 quality system certificate.