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Critical Environment Technologies ART Operation Manual

Art infrared refrigerant transmitter
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Operation Manual
Rev. 1 | 2014.02
ART
Infrared Refrigerant Transmitter
www.critical-environment.com

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  • Page 1 Operation Manual Rev. 1 | 2014.02 Infrared Refrigerant Transmitter www.critical-environment.com...

  • Page 2: Table Of Contents

    ART - Operation Manual Rev. 1 | 2014.02 Table of ConTenTs 1 POLICIES ....................5 1.1 Important Note ....................5 1.2 Warranty Policy ....................6 1.3 Service Policy ....................... 6 1.4 Copyrights ......................7 1.5 Disclaimer ......................7 1.6 Revisions ......................8 2 INTRODUCTION ..................
  • Page 3 Rev. 1 | 2014.02 ART - Operation Manual 6.2.3 Refrigerated Spaces ................24 6.2.4 Chillers ....................24 6.3 Mounting Procedure ..................25 7 WIRING AND CONFIGURATION ............28 7.1 Overview ......................28 7.2 Wiring Supply Power (24 VAC or 24 VDC) ............28 7.2.1 Maintaining Neutral Polarity ..............
  • Page 4 ART - Operation Manual Rev. 1 | 2014.02 10.4 Adjustment Using Calibration Gas ..............52 11 MODBUS COMMUNICATIONS ............54 11.1 Introduction ..................... 54 11.2 Communication Settings .................. 55 11.3 Analog Input Registers ..................55 11.4 Analog Output Registers .................. 56 11.5 Input Status Flags ....................

  • Page 5: Policies

    Rev. 1 | 2014.02 ART - Operation Manual 1 PolICIes 1.1 Important note Read and understand this manual prior to using this instrument. Carefully read the warranty policy, service policy, notices, disclaimers and revisions on the following pages. This product must be installed by a qualified electrician or factory trained technician and according to instructions indicated in this manual.

  • Page 6: Warranty Policy

    Rev. 1 | 2014.02 1.2 Warranty Policy Critical Environment Technologies Canada Inc. (CETCI), also referred to as the manufacturer, warrants this instrument, excluding sensors, to be free from defects in materials and workmanship for a period of two (2) years from the date of purchase by the original owner.

  • Page 7: Copyrights

    Rev. 1 | 2014.02 ART - Operation Manual whom it was purchased or you may contact CETCI directly. Prior to shipping equipment to CETCI, contact our office for an RMA #. All returned goods must be accompanied with an RMA number.

  • Page 8: Revisions

    ART - Operation Manual Rev. 1 | 2014.02 with the printed instructions contained within this manual or if the equipment has been improperly maintained or subjected to neglect or accident. Any of the forgoing will void the warranty. Under most local electrical codes, low voltage wires cannot be run within the same conduit as line voltage wires.

  • Page 9: Introduction

    It can be used on a stand-alone basis, connected to a controller or integrated into a Building Management System (BMS). The ART can be used in locations that require continuous monitoring and to add gas detection solutions to an existing system.

  • Page 10: Detection Options

    3.1 broadband Gas Detection The ART Broadband Gas Detector (Part Code: ART-B) is used as a general purpose gross leak detector and is factory tested and certified. The refrigerants are combined into three groups and is shipped with the accuracy indicated in the chart on the next page. Measurement performance is based on an average response profile for all of the gases within the group.

  • Page 11: Gas Specific Detection

    Section 10 Functional Tests and Gas Adjustments. 3.2 Gas specific Detection If more accurate detection is needed, the ART Gas Specific Detector is shipped factory certified and calibrated to the target refrigerant. For more information on Parameter 11 and refrigerant configuration instructions, see Section 9 Setting and Configuring the Parameters.
  • Page 12 ART - Operation Manual Rev. 1 | 2014.02 PART NUMBER REFRIGERANT ACCURACY ±30 ppm ±5% ART-R22 ±30 ppm ±5% ART-R123 R123 ±30 ppm ±5% ART-134A R134a ±30 ppm ±5% ART-R404A R404a ±30 ppm ±3% ART-R407A R407a ±30 ppm ±3% ART-R407C R407c ±30 ppm ±3%...

  • Page 13: Changing Gas Types And Accuracy

    ART - Operation Manual 3.3 Changing Gas Types and accuracy The ART-R22 is factory calibrated to R22 and has an AS-SHIPPED R22 response accuracy of ±30 ppm ±5% of reading. The gas detector may be changed to respond to any of the other listed refrigerants (see Parameter P.-11 in Section 9.2 Setting Parameters).

  • Page 14: Remote Controller Options

    ART - Operation Manual Rev. 1 | 2014.02 3.4 Remote Controller options The ART can connect to any controller through the standard analog output (voltage and current: see 4.1 Technical Specifications below), the standard alarm relay, or the digital Modbus RTU communications interface.
  • Page 15 Rev. 1 | 2014.02 ART - Operation Manual Baud rate: 9,600 or 19,200 (selectable) Start bits: Communication: Data bits: Modbus RTU over Parity: none, odd, even (programmable) RS-485 Stop bits: 1 or 2 (programmable) Re-entry time: 500 ms (min time between retries) End of msg: silent 3.5 characters...
  • Page 16 ART - Operation Manual Rev. 1 | 2014.02 Visual Alarm Red 4-digit LED display Alarm Delay Selectable; 0 to 15 minutes Fault Monitoring Fault codes presented to user ENVIRONMENTAL Operating -30°C to 40°C (-22°F to 104°F) Temperature Operating 5 - 90% RH non-condensing...

  • Page 17: Enclosure Dimensions

    Rev. 1 | 2014.02 ART - Operation Manual 4.2 enclosure Dimensions © 2014 All rights reserved. Data subject to change without notice.

  • Page 18: Features

    ART - Operation Manual Rev. 1 | 2014.02 5 feaTURes 5.1 front exterior enclosure         © 2014 All rights reserved. Data subject to change without notice.
  • Page 19 Rev. 1 | 2014.02 ART - Operation Manual NUMBER FEATURE FUNCTION  Power LED Green LED, indicates unit power is ON. Alpha-numeric display (to show concentration in  4-digit LED Display real-time) Used to access the parameter list. Used to back up one level without writing to memory when the ...

  • Page 20: Interior System Layout

    ART - Operation Manual Rev. 1 | 2014.02 5.2 Interior system layout 5.2.1 Front of the Enclosure     NUMBER FEATURE FUNCTION IR Bench Location of the Infrared sensor.  Pluggable terminal for relay connection.  Relay © 2014 All rights reserved. Data subject to change without notice.

  • Page 21: Back Of Enclosure

    Rev. 1 | 2014.02 ART - Operation Manual Modbus end of line Critical for good communication.  jumper Default setting is enabled.  Audible alarm 5.2.2 Back of the Enclosure       © 2014 All rights reserved. Data subject to change without notice.

  • Page 22: Mounting

    6 MoUnTInG 6.1 Warnings and Prerequisites WARNING: Explosion hazard. DO NOT mount the ART in an area that may contain flammable liquids, vapors, or aerosols. Operation of any electrical equipment in such an environment constitutes a safety hazard.

  • Page 23: Mounting Locations

    6.2 Mounting locations 6.2.1 General Placement Guidelines The ART should be installed plumb and level and securely fastened to a rigid mounting surface. Gas detectors must be located within the appropriate wire lengths from the central control unit (if used).

  • Page 24: Refrigerated Spaces

    ART - Operation Manual Rev. 1 | 2014.02 mechanical), filling or draining connections, etc. In machinery rooms where there is little or no airflow, placement options are: • Point Detection, where gas detectors are located as near as possible to the most likely sources of leakage, such as the compressor, expansion valves, mechanical joints or cable duct trenches.

  • Page 25: Mounting Procedure

    Rev. 1 | 2014.02 ART - Operation Manual the enclosure under or adjacent to the compressors. For enclosed air-cooled chillers or the outdoor unit for variable refrigerant volume and variable refrigerant flow (VRV/VRF) systems, mount the gas detector so as to monitor airflow to the extract fan.
  • Page 26 Step 3: Wall Mount (if doing a junction box mount, go to Step 4) Attach the ART base to the mounting surface using two #6 screws (provided) through two of the 7 flat surface mounting holes, being careful not to over-tighten the screws.
  • Page 27 Rev. 1 | 2014.02 ART - Operation Manual © 2014 All rights reserved. Data subject to change without notice.

  • Page 28: Wiring And Configuration

    ART - Operation Manual Rev. 1 | 2014.02 7 WIRInG anD ConfIGURaTIon 7.1 overview Prior to wiring and configuring the ART, assure the following conditions have been met: • ART back plate is mounted in an appropriate location • The cover panel is removed.
  • Page 29 Either 24 VAC or 24 VDC may be used to power the ART. Connect wiring to the appropriate terminal locations. Use 2 wires between 14 and 22 AWG.

  • Page 30: Maintaining Neutral Polarity

    Neutral polarity must be maintained across units. 7.3 Wiring alarm output (analog signal) The ART provides an analog output signal that is proportional to the level of gas detected. NOTE: No jumpers or hardware switch settings are required to configure the analog output.

  • Page 31: Wiring Digital Alarm Output Relay

    P.-03. Refer to Section 9 Setting and Configuring the Parameters for details. 7.4 Wiring Digital alarm output Relay An alarm setpoint may be programmed from the front panel of the ART. When the sensed gas level exceeds the alarm setpoint, the ART enters the alarm state. An on-board relay is tied to the alarm state, so you may activate (or deactivate) external equipment based on the ART’s current alarm status.

  • Page 32: Modbus Network Configuration

    ART - Operation Manual Rev. 1 | 2014.02 NOTE: The relay can be programed to be failsafe (normally energized). By default, the relay is set to be normally de-energized. This can be set using parameter P-06. Make relay connections (NO, NC, or both) using 18 to 20 AWG wires to terminal block positions 10, 11, and 12, noting normally open, normally closed, and common connectors.
  • Page 33 Rev. 1 | 2014.02 ART - Operation Manual FUNCTION WIRING TERMINATION RS-485 “B” (inverted) Modbus Network RS-485 “A” (non-inverted) Communications RS-485 shield NOTE: For Modbus network communications wiring, use only 18 to 24 AWG shielded twisted pair wire with 120 ohm characteristic impedance.
  • Page 34 Management System) are configured similarly. If the ART is at the end of the RS-485 network, then be sure to set the RS-485 terminator on the printed circuit board (PCB) to IN. This applies a terminating resistor to the end of the wires per the requirements of the RS-485 protocol.

  • Page 35: Conclusion

    Rev. 1 | 2014.02 ART - Operation Manual 7.6 Conclusion Once the base is mounted and all wiring is complete, align the gas detector housing and press it onto the base. The gas detector will snap into position, completing all electrical connections.

  • Page 36: Operation And Stabilization

    8.1 Power Up and Warm-up On powering up, the ART will sense for the presence of gas after an initial warm-up period of 2 to 5 minutes. The green LED will flash at a 1 second interval during the warm-up.

  • Page 37: Behavior During Alarm Conditions

    Once the alarm has been triggered it will remain latched until the concentration drops below 80% of the alarm setpoint. 8.5 Gas Detector faults 8.5.1 Overview There are two levels of faults monitoring built into the ART gas detector: • Non-critical •...

  • Page 38: Critical Faults

    ART - Operation Manual Rev. 1 | 2014.02 The following occurs when a non-critical fault condition exists: ITEM BEHAVIOUR DURING ALARM STATE Green LED ON (solid) Shows the appropriate fault code Display Operates normally Analog Output Modbus registers indicate the fault Modbus Registers 8.5.3 Critical Faults...

  • Page 39: Setting And Configuring The Parameters

    PaRaMeTeRs 9.1 User Interface overview The ART Gas Detector is configured through the built-in menu system. Once mounting is complete, attach the gas detector to the base and apply power. The user interface consists of four pushbuttons, a four digit LED numeric display, and a power LED.

  • Page 40: Setting Parameters

    ART - Operation Manual Rev. 1 | 2014.02 Saves the currently displayed parameter to memory. 9.2 setting Parameters 9.2.1 Overview Press and hold the information button (i) for 5 seconds to activate the parameter list. Each parameter is shown in turn by using the UP or DOWN buttons. The parameter is shown as P.-XX, with XX being the parameter value.
  • Page 41 Rev. 1 | 2014.02 ART - Operation Manual Analog Output Type Selects output type: Selects 0-5 V Selects 1-5 V Selects 0-10 V Selects 2-10 V Selects 4-20 mA (default) Alarm ON Delays Sets the ON delay time (0-15 minutes) for the alarm output signals (relay, Modbus).

  • Page 42: Display Mode

    ART - Operation Manual Rev. 1 | 2014.02 Audible Alarm The units have an internal audible alarm. You can disable this, but the default setting is “enabled” in compliance with EN378. ON (default) Display Mode The display can be turned on by using this parameter. When set to ON the display never shuts off (all operating modes).
  • Page 43 Rev. 1 | 2014.02 ART - Operation Manual Gas Groups / Specific Gas Selection Selects either gas group number for broadband operation or specific gas name for gas-specific mode. Broadband: Select from 3 groups of gases: R134a, R404a, R407a, R407c, R407f, R427a,...
  • Page 44 ART - Operation Manual Rev. 1 | 2014.02 Stop Bits Sets the number of stop bits required to match the controlling com- munications equipment (e.g., building management system, etc.). 1 stop bit (default) 2 stop bits Parity Sets Modbus parity option.
  • Page 45 Rev. 1 | 2014.02 ART - Operation Manual The analog output signal range is from 100 ppm to the default value of 3500 ppm, which is scaled across the actual output range selected by the analog output type parameter P.-03.
  • Page 46 ART - Operation Manual Rev. 1 | 2014.02 PARAMETER DESCRIPTION Gas Test Mode Places the gas detector in gas test mode. Disabled (default) Enabled When enabled, the display continuously cycles through the following: - CAL is displayed briefly. - Next, the gas group number or gas type (based on product code) is displayed.
  • Page 47 Rev. 1 | 2014.02 ART - Operation Manual Diagnostics Menu Parameter 18 provides access to the self-diagnostic information. The LED display shows “DIAG” until the Enter button is pressed. Use the UP and DOWN buttons to scroll through the list of diagnostic attributes.

  • Page 48: Completing Setup

    (i) for 5 seconds to exit the Parameter list. The gas detector is now actively monitoring its surroundings. NOTE: If no buttons are pressed for 2 minutes, the ART exits setup mode automatically. © 2014 All rights reserved. Data subject to change without notice.

  • Page 49: Functional Tests And Gas Adjustments

    Before testing the gas detectors on-site, the ART must have been powered up and allowed to stabilize. After initial installation, the ART should be gas tested to ensure proper operation.

  • Page 50: Bump Test Vs Adjusting Detector Response

    ART - Operation Manual Rev. 1 | 2014.02 • In compliance with locally applicable guidelines and regulations Qualified operators of the unit should be aware of the regulations and standards set down by the industry/country for the testing or calibration of this unit. This manual is only intended as a guide and, insofar as permitted by law, the manufacturer accepts no responsibility for the calibration, testing, or operation of this unit.

  • Page 51: Bump Testing

    • For bump test or calibration the ART should be powered up and fully stabilized as per Section 8 Operation and Stabilization. 10.3 bump Testing NOTE: Notify others that testing is underway.

  • Page 52: Adjustment Using Calibration Gas

    Section 4.1 Technical Specifications for acceptance criteria. 10.4 adjustment Using Calibration Gas Every ART gas detector is calibrated in a chamber by true diffusion method prior to leaving our facility. This method more closely emulates actual “real world” conditions. Field calibration using gas cylinder, regulator and hose directing span gas into the sensor may result in slightly higher readings.
  • Page 53 Rev. 1 | 2014.02 ART - Operation Manual cylinder and a flow regulation valve with flexible non-absorbent tubing. If an inappropriate concentration of span gas is applied during calibration, calibration may succeed but it does not mean the equipment has been calibrated properly. CETCI is not responsible for improperly calibrated detectors.

  • Page 54: Modbus Communications

    Refer to Section 7 Wiring and Configuration, for details. This section details the ART parameters that can be accessed via registers of the Modbus- RTU (“Modbus”) protocol. Generally (with the exception of some of the communications parameters), parameters you can access and/or configure from the front panel of the ART ©...

  • Page 55: Communication Settings

    Rev. 1 | 2014.02 ART - Operation Manual can also be accessed and/or configured via a Building Management System (for example) on the same Modbus network. 11.2 Communication settings There are 255 selections available to be set electronically, from addresses 1 to 255 inclusive.

  • Page 56: Analog Output Registers

    ART - Operation Manual Rev. 1 | 2014.02 Reserved 1008 Reserved 1009 Reserved 1010 Reserved 1011 16-bit fault code 0-65535 none 1012 11.4 analog output Registers Analog output registers are readable (using function code 03) and writable (using function code 06).

  • Page 57: Input Status Flags

    Rev. 1 | 2014.02 ART - Operation Manual 0=OFF 2007 Display mode none P.-09 1=ON 0=0-5V 1=1-5V 2008 Analog output type 2=0-10V none P.-03 3=2-10V 4=4-20 mA 0=9,600 2009 Baud rate none P.-13 1=19,200 2010 Stop bits 1 or 2 none P.-14...

  • Page 58: Output Status Flags

    ART - Operation Manual Rev. 1 | 2014.02 Detector fault (0 or 1=fault) 3002 Red LED state (0 or 1=ON) 3003 Green LED state (0 or 1=powered ON) 3004 Reserved 3005 Startup (0=normal operation, 1=warning) 3006 Reserved 3007 Reserved 3008 11.6 output status flags...

  • Page 59: Replacement Parts And Accessories

    Rev. 1 | 2014.02 ART - Operation Manual 12 RePlaCeMenT PaRTs anD aCCessoRIes NOTE: All modules come ready to mount to the original mounting base provided. 12.1 splash Guard The splash guard is a protective covering that attaches to the front of the enclosure. CETCI recommends using a splash guard to protect the detector’s sensor in wet environments or...

  • Page 60: Splash Guard Mounting Template

    ART - Operation Manual Rev. 1 | 2014.02 12.1.1 Splash Guard Mounting Template The splash guard uses key-hole mounting slots designed for #6 pan head fasteners that are provided with the splash guard. Locate the two screws in the keyholes (as shown in the diagram below).

  • Page 61: Metal Protective Guard

    Rev. 1 | 2014.02 ART - Operation Manual 12.2 Metal Protective Guard Part Code: SCS-8000-SPG The metal protective guard is heavy duty metal protective grate to help protect against abrasive damage, theft and vandalism to the transmitters. This is an added preventative on top of the product enclosure and the splash guard (if installed).

  • Page 62: Calibration Kit

    However, local regulations may specify the nature and frequency of this test. The ART features sophisticated internal status monitoring and will indicate whether a fault condition exists, both on the front display (F.-XX, with XX being the fault number) and over the Modbus communications network.
  • Page 63 Rev. 1 | 2014.02 ART - Operation Manual operating range, or if an installation error has occurred (wrong wiring, for example). The gas detector will typically continue to monitor its surroundings (except for fault F.-08), and may report inaccurate readings and false alarms.
  • Page 64 If 0x0040 Fault no leak is present, it indicates a gas detector error. Input supply power to the ART is out of range (i.e., 24V ±20%). IMPORTANT: If this fault is active, Input Voltage 0x0080...

  • Page 65: Diagnostic Attributes (P.-18)

    Section 13.1 Fault Codes for the HEX format cross reference. The records may be erased by pressing the ENTER button. Displays the number of days that the ART has been in service. The value of this attribute rolls over after 9999.

  • Page 66: Resetting To Default Values

    ART - Operation Manual Rev. 1 | 2014.02 Reserved Displays the sensor temperature in °C. Displays the sensor’s approximate rate of temperature change per half minute interval (°C change over 30 seconds). Reserved 13.3 Resetting to Default Values The gas detector may be reset to its default state, if needed, to aid in troubleshooting. All settings, including alarm setpoint, gas adjustments, selected gas curve, calibration data, Modbus address, etc.
  • Page 67 Rev. 1 | 2014.02 ART - Operation Manual Step 2: Press and hold both the UP and DOWN buttons for 5 seconds. This will cause the following to occur: • All the LED segments will then light for 3 seconds •...
  • Page 68 Critical Environment Technologies Canada Inc. Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada Toll Free: +1.877.940.8741 Tel: +1.604.940.8741 Fax: +1.604.940.8745 www.critical-environment.com © 2014 Critical Environment Technologies Canada Inc. All rights reserved. Data in this publication may change without notice.

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