Emerson Dixell GDS66M User Manual Download

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1592038710 Gas Leak Detector Modbus GB 01.12.2016

GDS41M-GDS66M-GDI41M-GDI66M 1/28

GDS41M – GDS66M

GDI41M – GDI66M

Summary of Contents for Dixell GDS66M

Page 1: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 1 28 GDS41M GDS66M GDI41M GDI66M ...

Page 2: ...3 2 3 CHILLERS 8 3 2 4 AIR CONDITIONING DIRECT SYSTEM VRF VRV 9 3 2 5 REMOTE SENSOR HEAD INSTALLATION 9 4 INSTALLATION 10 4 1 WIRING AND SETTINGS 12 4 2 OPERATION AND STABILIZATION 12 4 3 CONFIGURATION 13 4 4 ADJUSTING THE ALARM SET POINT 13 4 5 CALIBRATION 14 4 6 HOUSING DIMENSIONS 15 5 TROUBLESHOOTING 16 6 MODBUS COMMUNICATION 16 6 1 COMMUNICATION SETTINGS 16 6 2 WIRING AND ADDRESSING 17 6 3 BAU...

Page 3: ...he final machine application as a consultant however under no circumstances can the company be held responsible for the correct operation of the final equipment system Since Dixell products form part of a very high level of technology a qualification configuration programming commissioning stage is required to use them as best as possible Otherwise these products may malfunction and Dixell cannot ...

Page 4: ...IGHTS this manual is subject to copyright protection all rights are reserved under international and domestic copyright laws This manual may not be copied or translated in whole or in part in any manner or format without the written permission of DIXELL S r l All software utilized and or distributed by producer is subject to copyright protection All rights are reserved No party may use or copy suc...

Page 5: ...Range with SEMICONDUCTOR sensor GDI Range with INFRARED sensor Below the different type of boards GDS Semiconductor GDI Infrared The GD gas sensors are available in two different boxes according to the desired degree of protection IP and in relation of the specific installation IP41 Housing IP66 Housing The IP66 Housing is also available with different order code with the remote sensor NOTE The GD...

Page 6: ...able liquids XE Flamable Liquids vapors or aerosols Operation of any electrical equipment in such an environment constitutes a safety hazard XE safety CAUTION The GDS and GDI contain sensitive electronic components XE Electronic components that can be easily damaged Do not touch nor disturb any of these components NOTES The mounting location XE Mounting location of the monitor should allow it to b...

Page 7: ...Also consider ease of access for maintenance The size and nature of the site will help to decide which method is the most appropriate to use Locations requiring the most protection in a machinery or plant room would be around compressors pressurized storage vessels refrigerant cylinders or storage rooms or pipelines The most common leak sources are valves gauges flanges joints brazed or mechanical...

Page 8: ...ERS In the case of small water or air cooled enclosed chiller units mount the sensor so as to monitor airflow to the extract fans With larger models also place a sensor inside the enclosure under or adjacent to the compressors In the case of outdoor units For enclosed air cooled chillers or the outdoor unit for variable refrigerant volume and variable refrigerant flow VRV VRF systems mount the sen...

Page 9: ...bed height between 200 and 500 mm off the floor under mirrors away from drafts and heat sources like radiators etc at vanity units to avoid sources of steam in or near bathrooms Monitoring ceiling voids in a hotel room would not strictly comply with EN378 3 2 5 REMOTE SENSOR HEAD INSTALLATION The remote sensor is mounted in an electrical back box 44 mm deep to which the vented faceplate is fitted ...

Page 10: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 10 28 4 INSTALLATION GDS Gas Sensor Semiconductor ...

Page 11: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 11 28 GDI Gas Sensor Infrared ...

Page 12: ...ip point for the relay and audible alarm using the 0 5V scale measure at test points 0V and alarm test point REF1 Default factory setting is 50 of the range Time Delay A time delay for the operation of the relay and audible alarm can be selected using jumpers JP5 and JP6 Default factory setting is zero Audible Alarm The audible alarm can be disabled using jumper JP3 Default factory setting is enab...

Page 13: ...is 0 minutes You may wish to set to 15 minutes during start up See figures above for setting the jumpers Audible Alarm The units have an internal audible alarm You can disable this by jumper but the default setting is enabled in compliance withEN378 See figures above for setting the jumpers Output Decide which output is required 4 20mA 1 5V 0 10V relay outputs etc See figures above for setting the...

Page 14: ...ero adjustment maybe required due to differences in environmental conditions If the GDS or GDI is exposed to a large leak it should be tested to ensure correct functionality by electrically resetting the zero setting and carrying out a bump test See specific Dixell manual for this procedure Dixell recommends annual checks and gas calibration Dixell also recommends sensor replacement every 3 years ...

Page 15: ...038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 15 28 4 6 HOUSING DIMENSIONS Dimensions for the GD Gas Sensors with IP41 housing Dimensions for the GD Gas Sensors with IP66 housing ...

Page 16: ... COMMUNICATION 6 1 COMMUNICATION SETTINGS There are 256 selections and the addresses are numbered 0 to 255 inclusive Addresses are selected by rotating the hexadecimal dial switches SW1 and SW2 Values 1 to 247 are valid usable addresses providing a unique identity for each gas detector Addresses 248 to 255 and address 0 are reserved for implementing specific features Modbus data with a zero in the...

Page 17: ...sensor when multiple sensors are connected to a controller Valid addresses are 0 247 Modbus addressing can be selected by the combined settings on the hexadecimal dial switches SW1 and SW2 Addresses 0 15 are selectable with switch SW1 the least significant portion of the address SW2 scales the addresses by a factor of 16 the most significant portion of the address NOTE Address 0 is reserved to ena...

Page 18: ...EAD ONLY using function code 04 REGISTER DESCRIPTION RANGE UNIT 1000 Concentration gas level of full scale 0 100 1001 Concentration gas level in ppm 0 65 535 ppm 1003 Full scale sensor level in ppm 0 65 535 ppm 1004 Alarm set point of Full Scale 0 100 1005 Sensor timer 0 65 535 hours 1006 Detector address 1 247 n a 1007 Software version 100 n a Concentration Registers 1000 and 1001 The real time g...

Page 19: ...nds to a 20 Alarm Set Point given that the maximum voltage is 5 0 Volts The Alarm Set Point register 1004 will contain 20 to represent 20 and this corresponds to 200 ppm for a detector with a full scale range of 1000 ppm If a delay period up to 59 minutes is set in registers 2001 the red LED and the Alarm Flag will be immediately activated but the relay and the buzzer will wait for the duration of...

Page 20: ...tores the software setting for the alarm set point in parts per million ppm Writing the value zero into this register will enable the hardware potentiometer P1 to determine the Alarm Set Point If a value greater than zero and less than the full scale sensor limit in ppm is written into register 2000 then the hardware potentiometer setting is ignored and the value written into register 2000 determi...

Page 21: ...egister 4000 will deactivate the buzzer for the period defined by the sounder delay register 2002 The sounder delay is in minutes and the maximum value is 59 so for example if the value in register 2002 is 25 then the buzzer will be disabled for 25 minutes during an alarm condition After this 25 minute mute period the buzzer will be reactivated if the detector is still detecting gas concentrations...

Page 22: ...ions registers and flags within the detectors Output Status Flags are READABLE using function code 01 and WRITABLE using function code 05 REGISTER FLAG RANGE DETAILS 4000 Buzzer 0 1 1 Buzzer is on 0 Buzzer is off 4001 Test 0 1 1 Sensor needs testing operating more than 1 year 0 Sensor does not require testing yet 7 MODBUS FLOW CHARTS 1 Flowchart of alarm control ...

Page 23: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 23 28 2 Flowchart of timer control ...

Page 24: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 24 28 3 Flowchart of alarm setpoint control ...

Page 25: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 25 28 4 Flowchart of alarm setpoint control ...

Page 26: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 26 28 5 Flowchart of buzzer delay control ...

Page 27: ...uzzer with enable disable function Relay Output 1 Relay rated 1 A 24 VAC VDC Relay Delay Configurable 0 1 5 or 10 minutes IP Rating IP41 GDS41M IP41 GDI41M IP66 GDS66M IP66 GDI66M Temperature Rating IP41 Housing IP66 Housing 20 to 50 C 4 to 122 F 40 to 50 C 40 to 122 F Humidity Rating 0 95 Non condensing 0 95 Non condensing Dimensions 86 x 142 x 53 mm 3 35 x 5 59 x 2 09 175 x 165 x 82 mm 6 89 x 6 ...

Page 28: ...1592038710 Gas Leak Detector Modbus GB 01 12 2016 GDS41M GDS66M GDI41M GDI66M 28 28 ...

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