Summary of Contents for Elliwell LKD 500
- Page 1 Refrigerant Gas Detectors for Machinery Rooms, Cold Rooms & Freezer LKD 500 / 600 User Refrigerant Leak Detection Manual P/N: 0024-9551 | November 2019 Revision F...
- Page 2 NOTICES Product improvements and enhancements are on-going, therefore the specifications and information contained in this document may change without notice. Manufacturer shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
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Page 3: Table Of Contents
General Safety Statements ..................... 5 Product Overview ......................6 Product Description ......... 7 Intended Uses / Applications..................7 LKD 500..........................8 2.2.1 LKD 500 Product Overview ..........................8 2.2.2 LKD 500 Components ..........................9 LKD 600 ........................... 10 2.3.1 LKD 600 Product Overview ........................10 2.3.2... - Page 4 Care & Maintenance ........25 Overview of Normal Operation ..................25 Adjustments ........................26 5.2.1 Introduction ..............................26 5.2.2 General Calibration Procedure ........................26 5.2.3 Zero Adjustment ............................27 5.2.4 Span Adjustment ............................28 5.2.5 System Bump Test ............................29 Troubleshooting ......................30 5.3.1 Hexadecimal Format ..........................30 5.3.2 Fault Codes ..............................30 Sensor Maintenance ......................
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Page 5: Introduction
1. Introduction 1.1 About this Manual Thank you for investing in a LKD Gas Detector. To ensure operator safety and the proper use of the gas detector, please read the contents of this manual for important information on the operation and maintenance of the instrument. IMPORTANT: Before installing this product, carefully read and strictly follow the instructions in the manual. -
Page 6: Product Overview
DANGER: This instrument is neither certified nor approved for operation in oxygen- enriched atmospheres. Failure to comply may result in personal injury or death. WARNING: Use this product only for the purposes specified in this document and under the conditions listed. WARNING: This instrument has not been designed to be intrinsically safe for use in areas classified as being hazardous locations. -
Page 7: Product Description
Refrigerants • Toxic and combustible gases The instruments may be purchased in the following configurations: • LKD 500 - IP66 • LKD 500 - IP41 • LKD 600 - IP66 with Remote IP66 Sensor LKD gas detectors may be connected to a third-party device capable of accepting digital and/ or analog outputs from the gas detectors, such as a Building Management System (BMS), Programmable Logic Controller (PLC) and/or Modbus RTU. -
Page 8: Lkd 500
2.2 LKD 500 2.2.1 LKD 500 Product Overview The LKD continuously monitors indoor or outdoor ambient air for the following gases: • Refrigerants • Toxic and combustible gases The instruments may be purchased in one of two configurations with or without relays output: •... -
Page 9: Lkd 500 Components
2.2.2 LKD 500 Components This product uses semiconductors which can be damaged by electrostatic discharge (ESD). When handling the PCB, care must be taken so that the electronics are not damaged. (MAG #1) (MAG #2) COMPONENT DESCRIPTION COMPONENT DESCRIPTION M16 Cable Glands (×6) -
Page 10: Lkd 600
2.3 LKD 600 2.3.1 LKD 600 Product Overview The LKD 600 continuously monitors indoor or outdoor ambient air for the following gases: • Refrigerants • Toxic and combustible gases The instruments may be purchased in one of two configurations with or without relays output: •... -
Page 11: Lkd 600 Design Features
2.3.2 LKD 600 Design Features Transmitter options: 2× IP66 rated ABS enclosure connected via RJ45 cable (up to 5 meters in length) Power options: 24 VAC 19.5 to 28.5 VDC Diagnostic/status LED (3 color: green, orange and red) Configurable output signal options: 2 x relays as option (high alarm / low alarm / fault) 1×... - Page 12 Transmitter Remote Sensor (MAG #1) (MAG #2) Connection Cable COMPONENT DESCRIPTION COMPONENT DESCRIPTION M16 Cable Glands (×6) Tactile Switch #2 Rubber Gaskets (×2) Relay 2 Connection (HIGH) Internal Alarm Buzzer Relay 1 Connection (LOW) Power Connections (×2) Magnetic Switch #1 Digital Connection (Modbus) Magnetic Switch #2 Analog Connection...
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Page 13: Installation
• The types of optional equipment and accessories that will be used with the system • Any limiting factors or regulations that would affect system performance or installations • Wiring details, including: – The LKD 500 enclosure provides the following cable gland openings: 2×, M20, supports 10-14mm cable outer diameter 6×, M16, supports 4-8mm cable outer diameter –... -
Page 14: Restrictions
– Secondary circuit must be supplied from an isolating source – The wiring for the relays must be selected and fused according to the rated voltages, currents, and environmental conditions – If stranded conductors are used, a ferrule should be used –... -
Page 15: Electrical Installation
3.4 Electrical Installation 3.4.1 Preparations WARNING: Ensure wiring for relays and connections for sensor(s) are made before applying power. CAUTION: This product uses semiconductors which can be damaged by electrostatic discharge (ESD). When handling the printed circuit boards (PCBs), observe proper ESD precautions so that the electronics are not damaged. -
Page 16: Relay Wiring
Connection Description Label Wiring Termination 24 VDC/VAC neutral / 24V IN: - ground 24 VDC/VAC IN 24V IN: + 24 VAC neutral Power 24 VDC/VAC neutral / 24 VDC/VAC OUT 24V OUT: - ground (power daisy chain terminal) 24V OUT: + 24 VAC neutral MODBUS: B RS-485 “B”... -
Page 17: Installation Of Remote Sensing Head (Lkd 600)
Terminal Normal Operation Failsafe Operation Normally Closed Normally Closed Common Common Normally Open Normally Closed 3.4.4 Installation of Remote Sensing Head (LKD 600) Standard RJ45 “Cat 5E STP” Ethernet cables up to 5 meters long may be used with the remote sensor. The cable provided from the factory is 5 meters long. IMPORTANT: Before using this product, carefully read and strictly follow the instructions in the manual. -
Page 18: Modbus Rtu Rs-485 Interface
3.4.5 Modbus RTU RS-485 Interface For the Modbus RS-485 network use a 16 to 24 AWG (0.5 to 1 mm2) 3-core, 2 twisted pair + ground, shielded cable with 120 Ω characteristic impedance. Recommended: Belden 3106A (or equivalent) The Modbus address, baud rate, stop bit, parity and slave termination is configured through the setup menu. -
Page 19: Conclusion
3.4.6 Conclusion After all wiring is completed, power the transmitter and confirm operation, and then prepare to seal the enclosure. Note that the IP 41 configurations do not include a sealing gasket. Ensure gasket is aligned correctly (IP66 versions only) and tighten the lid using the supplied hardware in an “X”... -
Page 20: Operation
4. Operation 4.1 Overview of Normal Operation WARNING: Before leaving the instrument for normal operation, check the configuration for proper settings and check calibration. 4.1.1 Applying Power & the Start-up Sequence After applying power, the instrument will go through a start-up sequence (initialization, audible/ visual test and self-test sequence). -
Page 21: Verifying Analog Signals
4.1.2 Verifying Analog Signals The LKD 500/600 gas detector features a single configurable analog output. During normal operation the analog output of the instrument is proportional to the detected gas concentration and can be selected from the following. 1 to 5 V... -
Page 22: Verifying The Modbus Signal
4.1.3 Verifying the Modbus Signal The LKD Gas Detector provides a Modbus RTU digital interface. 4.1.4 Status Indication The LKD gas detections provide external indication of its current operational state via audible and visual feedback. Visual indication of the instrument status is provided by a single tri-color LED (Green/Red/Orange). -
Page 23: Switch Functions
4.1.5 Switch Functions User interaction with the LKD gas detector is accomplished through the use of two magnetic switches located on the bottom of each unit. To actuate a magnetic switch, apply the supplied magnetic wand to the relevant switch location as indicated below : (MAG #1) (MAG #2) Switch locations above are referred to in this document as MAG#1 and MAG#2. -
Page 24: Reset System To Factory Default Settings
State Switch 1 Hold Switch 2 Hold Warm-up Normal Start Zero Calibration Start Span Calibration Low Alarm Mute Buzzer Ack. Latched Alarm High Alarm Mute Buzzer Ack. Latched Alarm Offline Fault Mute Buzzer Ack. Latched Alarm Negative Gas Fault Mute Buzzer Start Zero Calibration Zero Cal. -
Page 25: Care & Maintenance
5. Care & Maintenance 5.1 Overview of Normal Operation Interval Function Check calibration. Check LEDs for proper operation. During Commissioning Check for proper buzzer and relay operation.* Check signal transmission to the BMS/BAS (central controller) if connected.* Inspection by trained service personnel. Check LEDs for proper operation.* Every 6-12 Check for proper buzzer and relay operation.*... -
Page 26: Adjustments
5.2 Adjustments 5.2.1 Introduction Adjustment of the detector must be performed at regular intervals as required by national standards or regulations (e.g., EN 378, ASHRAE 15, BREEAM, etc.). Breathing Hazard: Calibration gas MUST NOT be inhaled! See appropriate Safety Data Sheets. Calibration gas should be vented into a fume hood or to the outside of the building. -
Page 27: Zero Adjustment
Fit calibration adapter to the gas detector lid. If using a variable flow regulator, adjust the gas flow to approximately 0.3 L/min. 5.2.3 Zero Adjustment Ambient air can be used to zero the sensor instead of synthetic air only if the area is known to be free of the target gas or any gas to which the sensor may be cross-sensitive. -
Page 28: Span Adjustment
5.2.4 Span Adjustment WARNING: Except for CO sensors, calibration gas must be in a balance of air, not nitrogen (N IMPORTANT: At elevations higher than 6,560’ (2,000 m), calibration will result in a lower reading. Above 6,560’, the instrument should be calibrated in the environment of operation. -
Page 29: System Bump Test
5.2.5 System Bump Test A bump test is a live test of the system to verify that the detector responds to gas and all connected alarm devices, BMS, etc. are operating accordingly. It is recommended that all involved persons are informed about the test and certain alarms might have to be inhibited (e.g., shutdown valves, notification of authorities, etc.). -
Page 30: Troubleshooting
5.3 Troubleshooting 5.3.1 Hexadecimal Format All fault codes can be retrieved through the Modbus interface and are shown in hexadecimal (hex) format. A hex digit can represent multiple codes as shown below. Equivalent Equivalent Equivalent Equivalent Code Error Code(s) Code Error Code(s) Code Error Code(s) - Page 31 0x00001000 Modbus Fault Communications then call service Analog Output Fault Power-cycle. If it re-occurs 0x00002000 Error updating DAC value (LKD 500 Only) then call service Magnetic and/or Tactile 0x00008000 Stuck switch switch activated for > 1 Call service minute Cannot detect sensor...
- Page 32 Sensor AFE Read Fault Cannot read from EC Check sensor connection/ 0x00100000 (EC only) sensor AFE Replace Sensor Module Sensor AFE Read Fault Cannot read from EC Check sensor connection/ 0x00200000 (EC only) sensor AFE Replace Sensor Module Sensor AFE Read Fault Cannot read from EC Check sensor connection/ 0x00400000...
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Page 33: Sensor Maintenance
5.4 Sensor Maintenance 5.4.1 Replacing the Sensor Module CAUTION: This product uses semiconductors which can be damaged by electrostatic discharge (ESD). When handling the PCB, care must be taken so that the electronics is not damaged. To replace the gas detector’s sensor module: 1. -
Page 34: Additional Information
6. Additional Information 6.1 Sensor Principle 6.1.1 Electrochemical Sensors Electrochemical sensors measure the partial pressure of gases under atmospheric conditions. The monitored ambient air diffuses through a membrane into the liquid electrolyte in the sensor. The electrolyte contains a measuring electrode, a counter-electrode and a reference electrode. An electronic “potentiostat”... -
Page 35: Semiconductor Sensors
IMPORTANT: Certain substances in the atmosphere to be monitored may impair the sensitivity of the sensors. Such substances include, but are not limited to: Polymerizing substances such as acrylonitrile, butadiene and styrene, Corrosive compounds such as halogenated hydrocarbons (releasing halogens such as bromine, chlorine or fluorine when oxidized) and halogen hydride acids as well as acidic gaseous compounds such as sulfur dioxide and nitrogen oxides, Catalyst poisons such as sulfurous and phosphorous compounds,... -
Page 36: Infrared Sensors
6.1.4 Infrared Sensors The infrared (IR) gas sensor is designed to measure the concentration of combustible gases and vapors in the ambient air. The sensor principle is based on the concentration-dependent absorption of infrared radiation in measured gases. The monitored ambient air diffuses through a sintered metal material into the enclosure of an optical “bench”. -
Page 37: Technical Specifications
WARNING: Observe the applicable local waste disposal regulations. For information, consult your local environmental agency, local government offices or appropriate waste disposal companies. 6.3 Technical Specifications 6.3.1 General Specifications Category Specifications Normal operation: 4 to 20 mA Drift below zero: 3.8 mA Measuring range exceeded: 20.5 mA Analog Current... - Page 38 M20, 10-14mm cable outer diameter Cable gland M16, 4-8mm cable outer diameter Enclosure IP41 / IP66 protection LKD 500 IP41: 6.5× 6.5×3.0” (165×165×77 mm) LKD 500 IP66: 6.5×6.5×3.4” (165×165×87 mm) Enclosure Size Physical (W×H×D) (Approx.) Specifications LKD 600: 6.5×6.5×3.4” (165×165×87 mm) LKD 600 Remote: 4.5×...
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Page 39: Sensor Specifications
6.3.2 Sensor Specifications Sensor Semi- Catalytic Bead Electro-Chemical (EC) Infrared (IR) Information Conductor (SC) (CAT) Sensor Life 2 to 3 years 5 to 8 years 5 years 5 years (Typical) NH3 100 / 1,000 ppm: -40 to 40° C NH3 5,000 ppm: -40º... -
Page 40: Modbus Registers
EC Sensors Formula Measuring Range(s) 0 to 100, 0 to 1,000, Ammonia 0 to 5,000 ppm Carbon Monoxide 0 to 1,000 ppm Nitrogen Dioxide 0 to 20 ppm 6.4 Modbus Registers IMPORTANT: If items span two registers (e.g., 1005 and 1006), then the registers are “long” or “float”... - Page 41 1102 Signed Raw Gas Concentration PPM or % VOL or % LEL - no 32-bit signed Concentration PPM thresholding; used for zero- Integer 1103 calibration to see negative values 16-bit 1104 Sensor Burning Hours Hours since last calibration unsigned Integer 1105 Accumulated PPM Hours since 32-bit...
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Page 42: Integration - Static Sensor Data
Seconds remaining in auto zero 1119 Auto Cal Zero Time Remaining calibration procedure Seconds remaining in auto span Unsigned 1120 Auto Cal Span Time Remaining calibration procedure Integer Auto Cal Recovery Time Seconds remaining in span 1121 Remaining recovery Maximum Temperature Maximum Temperature reported Signed 1122... - Page 43 Sensor calibration gas lower limit in 1132 Sensor cal gas lower limit display units Sensor calibration gas upper limit in 1133 Sensor cal gas upper limit display units Sensor Low Alarm Limit in display units. (The minimum which the 1134 Sensor Low Alarm Limit level low alarm set point may be set.)
- Page 44 UID Characters 1 & 2 (8 character 1145 Sensor Controller UID Char 1,2 UID string = "XXXXXXXX") UID Characters 3 & 4 (8 character 1146 Sensor Controller UID Char 3,4 UID string = "XXXXXXXX") UID Characters 5 & 6 (8 character 1147 Sensor Controller UID Char 5,6 UID string = "XXXXXXXX")
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Page 45: Integration - General System Setup
6.4.3 Integration - General System Setup Holding Register (Function 03/06 Read / Write) Writing the correct unlock code allows an external controller to 2100 Parameter Unlock change system parameters (0000- 16-bit 9999) Unsigned Integer Modbus address 1-247 (if hardware 2101 RS-485 Node Address override - write exception / read Modbus switch state) - Page 46 0 = Buzzer normal operation, 1 = Buzzer disabled (if hardware 2111 Buzzer disable override - write exception / read dip 0 = NO relay, 1 = Failsafe relay (if Relay Contact Behavior / 2112 hardware override - write exception Boolean Failsafe / read dip 5)
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Page 47: Integration - Calibration
2124 6-digit Bluetooth passkey (000000- 32-bit 999999), numeric, can only be Bluetooth Passkey Unsigned read/written if system is unlocked, Integer 2125 requires power cycle to take effect 6.4.4 Integration – Calibration Holding Register (Function 03/06 Read / Write) Concentration of calibration gas applied during calibration (must be 16-bit Sensor Calibration gas applied... -
Page 48: Lkd Compatibility - Status Flags
Set value of analog output in % full- 16-bit Signed 2808 Analog Output Value scale (0% to 100%) Integer Set value control state of analog 16-bit output (0=Manual, 1= Fault, 2 = 2809 Analog Output Value State Unsigned Offline, 3 = Underflow, 4= Overflow Integer , 5=PPM) 6.4.6 LKD Compatibility - Status Flags... -
Page 49: Lkd Compatibility - Clear Special States
3103 Sensor Fault (0 or 1 = fault) Set if any fault flag is active Sensor Saturation (0 or 1 = gas Set if gas concentration exceeds 3104 outside limits) full-scale range Boolean Sensor Underflow (0 or 1 = gas Set if sensor is still in warm-up 3105 less than zero) - Page 50 Calibrate span after auto calibration 4108 Auto Span Calibration time Clear calibration due flag and rest 4109 Clear calibration expired flag burning hours to 0 Boolean 4110 Clear Maximum Temperature Clear Maximum Temperature Clear Maximum Gas 4111 Clear Maximum Gas Concentration Concentration 4112 Bluetooth Enable...
- Page 51 Technical Customer Support +39 0437 986 300 Sales +39 0437 986 100 (Italy) +39 0437 986 200 (Other Countries) Manufactured by Bacharach, Inc. 621 Hunt Valley Circle New Kensington, PA 15068, USA MADE IN USA...
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