Bacharach AGM300, ADM800 manual Functional Overview, General Description, Communication Options

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Functional Overview

General Description

The AGM300 is designed to support compliance to federal, state and local safety codes governing ammonia gas emissions. Avoiding significant ammonia gas loss reduces equipment replacement costs, maintains equipment efficiency, promotes safety, and protects the environment.

The AGM300 provides for the continuous monitoring of ammonia gas levels in up to 16 separate test zones. Each zone can be independently programmed to identify leak (small), spill (medium), or evacuation (large) levels of gas. The instrument also retains a log of previous readings that can be easily accessed for analysis.

An audible alarm and large LED indicators are provided to signal alarm conditions, and relay contacts are provided for the connection of external alarm devices. The system also includes two 4–20 mA current loop interfaces (optional) for connection to external devices.

The AGM300 requires only minor periodic maintenance such as the occasional replacement of filters. The instrument incorporates active diagnostics that continuously monitor the system for proper operation. An LED indicator is provided to indicate system malfunctions, and fault codes are displayed that enable the operator to identify the source of the fault.

Communication Options

The AGM300 features full two-way communications via an RS-485 interface. MODBUS RTU is the communication protocol standard. The instrument can be connected directly to a Building Management System or it may be operated as a stand-alone system using the ADM800 Ammonia Display Module.

An RS-232C port is also provided for connection to a PC. This enables the AGM300 to be setup from a personal computer.

Please refer to the Appendix for a more complete discussion of communication protocols.

Suggested Location of Sampling Points

At the point of an ammonia gas leak the gas is nearly pure. As the gas is dispersed into the air, the gas molecules diffuse causing a dilution of the original concentration. The AGM300 measures the ammonia gas concentration at the precise point the sample is collected. Therefore, if the termination of the collection line is not at the exact point of the gas leak, then the unit will read a diluted mixture of the gas and air.

It should also be noted that when ammonia gas is cold it is heaver than air and settles below the leak point, but as the gas warms to room temperature it becomes lighter than air and tends to collect above the point of a leak. Consequently, sampling points should ideally be located as close as possible to the source of potential leaks. If this is impractical, then the alarm set points should be adjusted for that zone to compensate for the dilution of the gas. DO NOT plug any of the zones. Plugging a zone will give the monitor a false indication during

start up.

The AGM300 should be centrally located in the mechanical room and be readily accessible for easy visual monitoring and servicing. Air sample tubing may be run in lengths up to 500 feet. The fresh air purge line should draw from an area that does not contain any ammonia gas and cannot exceed 300 feet in length. The exhaust line should run to an out side location if possible. The length of the exhaust line cannot exceed 300 feet.

Ideally, two to three pick up points spaced around each chiller will provide sufficient coverage. It may be necessary to perform a “smoke” test of the mechanical room to determine the best locations. The smoke test would provide the pattern of air currents present in the mechanical room.

Instruction 3015-4275

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Contents Rev May AGM300 / ADM800 Ammonia Gas Monitoring SystemInstruction Table of Contents Introduction How to Use This ManualPlease Read this Manual Carefully Before Use Safety Precautions Altitude Limit Hazard Symbols on MonitorInstallation Category CleaningSuggested Location of Sampling Points Functional OverviewGeneral Description Communication OptionsMachine Room ChillerLED Standard Accessories for a 4 Point SystemLocating the Monitor AGM300 Installation ConsiderationsInspection AGM300 Mounting Specs InstallationAGM300 Mounting Instructions Screw LocationsInlet / Purge Ports AGM300 Connecting Air LinesOverview AGM300 Side ViewTubing Considerations Connecting Purge LineConnecting Exhaust Line Connecting Sample Intake LinesAGM300 Interior Schematic / OUT Do not Apply PowerSwitches / Fuses ON/OFFVAC Installation AGM300 Electrical WiringAGM300 AC Input Power and Ground Connections Integrating with Building Management Systems AGM300 Connecting Communication DevicesRS-485 Connector Ammonia Display Module ADM800 ConnectionPersonal Computer Refer to AGM300 PC Software Section Changing Terminator SettingsOUT Multiple AGM’s Connecting to a Building Management SystemRS-485 Connections Between AGM300’s Unit Node Terminator Outout Building Management System Programming the AGM300 Using PC SoftwareAGM300 PC Software Multiple AGM300’s Connected to a Building Management SystemTrend Data Saving the AGM300 Program to a Disk or DriveTo Open a Saved Program To Send a Saved Program to an AGM300Sealevel SYSTEMS, INC USB Type LaptopsConnection Current Loop ConnectorAGM300 Current Loop Interfaces Optional 4-20 mAdc OutputsAGM300 Relay Connector AGM300 Connecting External AlarmsTypical AGM300 Relay 1 and Relay 2 Wiring Leak Spill Evacuate FaultADM800 Oblique Photo ADM800 InstallationADM800 Installation Considerations ADM800 Mounting Specs ADM800 Mounting InstructionsFront Panel Chassis ADM800 Interior SchematicTo Host To MonitorsADM800 Electrical Wiring ADM800 AC Input Power and Ground Connections AGM300 Network ADM800 Communication ConnectionsIntegration with Building Management System To Monitor Changing Terminator Switch SettingsADM800 Relay Connector ADM800 Connecting External AlarmsADM800 Operation ADM800 Exterior SchematicADM800 Overview System Screen ADM800 Screen DisplaysPassword Protection Setup ParametersADM800 System Programming Setting the Clock ADM800 Setup ProgrammingClock Setup Screen AGM Baud Rate Navigating to the 1st ADM Setup ScreenContrast Number of AGM UnitsBuilding Management System Stop Bits Audible AlarmPassword Enabling Building Management System ConnectionAGM Node Address Navigating to the 2nd ADM Setup ScreenSetting Relay Parameters ADM Setup Screen #2AGM Setup Screen #2 AGM300 Setup ProgrammingNavigating to the 1st and then 2nd AGM Setup Screen Screen #1 AGM Setup Screen #1Zone Hold Time Number of Zones InstalledAlarm Ack Mode LocationZone Change Re-Zero ModeLoop 2 Factor AutoService Timeout Navigating to the 3rd AGM Setup ScreenAGM Setup #3 Screen Distance ADM800 Zone Setup ProgrammingNavigating to the 1st Zone Setup Screen Zone Setup Screen #1Log Interval Average TemperatureNavigating To the 2nd Zone Setup Screen Current PPMSpill Level Re-Setting the Peak PPM ValueEvacuation Level Zone Screen General OperationFunctional Overview Working with the Zone ScreenZone Screen Alarm Mode Zone Screen Hold ModeFault Conditions Working with the System Screen System Screen Alarm ModeAlarm Log Screen AGM Setup #1 ScreenSystem Screen Fault Mode Responding To Alarms Working with AlarmsAlarm Summary Screen Alarm Detail Screen Alarm Detail ScreenAlarm Summary Screen Acknowledge Mode Acknowledging AlarmsTrend Screen Working with the Trend ScreenOverview Log Interval Navigating To the Trend ScreenNavigating to the Fault Screen Working with System FaultsFault Screen Critical Faults Reset to Factory Default SettingsViewing Fault Log Clearing System FaultsFault Log Screen Calibration Screen Adjusting Calibration FactorWorking with the Calibration Screen Navigating to the Calibration ScreenCalibration Procedure Diagnostic Screen Working with the Diagnostic ScreenNavigating to the Diagnostic Screen Diagnostic Screen OverviewInstruction System Screen Service Mode Service ModeInstruction Appendix Replacing Fuses AGM300 / ADM800 MaintenanceServicing Inline Filter Servicing Air LinesIntake Manifolds Optional AccessoriesMA Interface Board ADM800 Logic Diagram Modbus RTU Protocol RS-485 Communication ProtocolProtocol Details AGM300 Modbus RTU OperationKey Comm Protocol Parameters Modbus Mode RTU onlyTIM Summary of RegistersData Type Abbreviations Register Name Number Type DescriptionMinutes RS-485BAUD REVUnused TIM UnusedLSB Service mode register to change this parameterMode. do not Modify use zone hold register or MSBVariable Type Length Description Zone Data Register 0x12xxh R/W 78 bytesGood. do not Modify Instruction Instruction Stpppm To Release the Zone Hold Use the Following Sequence of Steps Fault Log Register Register 0x1900, 0x1901h Bytes Instruction Time record for each of the 100 log points. The format Point to current readingLast 100 log points 2 byes per point Warranty Warranty and ServiceService Products Covered under Warranty and Service Policy Return ProcedureField Repair AGM300 Specifications ADM800 Specifications Instruction Headquarters Hunt Valley Circle, New Kensington, PA

AGM300, ADM800 specifications

The Bacharach ADM 800 and AGM 300 are advanced analyzers designed for efficient monitoring and detection of gases in various applications. Known for their reliability and accuracy, these instruments cater to commercial and industrial sectors, ensuring safety and compliance with environmental regulations.

The Bacharach ADM 800 is a portable gas detection device renowned for its ability to detect multiple refrigerants. With a user-friendly interface, it features a high-resolution display that provides real-time data on refrigerant concentrations, allowing technicians to quickly identify leaks during maintenance operations. One of its standout technologies is a highly sensitive thermal conductivity sensor, which enables the ADM 800 to differentiate between various hydrocarbon refrigerants with precision.

Equipped with data logging capabilities, the ADM 800 can store and retrieve measurement data, making it an invaluable tool for tracking refrigerant trends over time. The device supports USB connectivity for easy transfer of data to computers, facilitating detailed reporting and analysis. Its robust design incorporates a protective casing that ensures durability in challenging work environments, making it ideal for both field use and stationary applications.

On the other hand, the Bacharach AGM 300 is specifically crafted for continuous gas monitoring in HVAC systems. This stationary device excels in measuring concentrations of gases such as CO, CO2, and various refrigerants, ensuring optimal performance and compliance. The AGM 300 uses advanced electrochemical sensors for precise gas measurements, providing real-time feedback and alerting users to any hazardous conditions.

One of the notable features of the AGM 300 is its ability to integrate seamlessly with building management systems, enabling centralized control and monitoring of gas levels across multiple locations. This connectivity enhances the safety of industrial and commercial spaces by allowing for automated responses to detected gas levels, which can significantly mitigate risks associated with gas leaks.

Both models emphasize user-centric design, with intuitive interfaces and clear displays, making them accessible even to those with minimal training. Additionally, their low maintenance requirements and long sensor life contribute to reduced operational costs.

In conclusion, the Bacharach ADM 800 and AGM 300 are exemplary solutions for gas detection and monitoring. Their advanced technologies, robust features, and user-friendly designs make them indispensable for ensuring safety and regulatory compliance in various environments.
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