Bacharach ADM800 User manual

AGM300 / ADM800
Ammonia Gas Monitoring System
Instruction 3015-4275
Installation / Operation / Maintenance
Rev. 3 – May 2006
Product Leadership • Training • Service • Reliability
INSPECTION EQUIPMENT
MEASURING EQUIPMENT
61KN

A Instruction 3015-4275
Notice:
Product improvements and enhancements are continuous; therefore the specifications and information
contained in this document may change without notice.
Bacharach, Inc. 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.
No part of this document may be photocopied, reproduced, or translated to another language without the prior
written consent of Bacharach, Inc.
Copyright © 2003 −2006, Bacharach, Inc., all rights reserved.
BACHARACH®is a registered trademark of Bacharach, Inc. All other trademarks, trade names,
service marks and logos referenced herein belong to their respective owners.

Instruction 3015-4275 i
Table of Contents
INTRODUCTION..............................................................................................................................................................II
SAFETY PRECAUTIONS .................................................................................................................................................III
WARNING STATEMENTS ........................................................................................ERROR!BOOKMARK NOT DEFINED.
CAUTION STATEMENTS .........................................................................................ERROR!BOOKMARK NOT DEFINED.
HAZARD SYMBOLS ON MONITOR ..........................................................................ERROR!BOOKMARK NOT DEFINED.
FUNCTIONAL OVERVIEW .............................................................................................................................................. V
AGM300 INSTALLATION...........................................................................................................................................1
AGM300 -INSTALLATION CONSIDERATIONS................................................................................................................2
AGM300 -MOUNTING INSTRUCTIONS ..........................................................................................................................3
AGM300 -CONNECTING AIR LINES..............................................................................................................................4
AGM300 -INTERIOR SCHEMATIC .................................................................................................................................6
AGM300 -ELECTRICAL WIRING...................................................................................................................................8
AGM300 -CONNECTING COMMUNICATION DEVICES .................................................................................................10
MULTIPLE AGM’S......................................................................................................................................................12
CONNECTING TO A BUILDING MANAGEMENT SYSTEM ................................................................................................12
AGM300 -PC SOFTWARE...........................................................................................................................................13
AGM300 -CURRENT LOOP INTERFACES.....................................................................................................................16
AGM300 -CONNECTING EXTERNAL ALARMS ............................................................................................................17
ADM800 INSTALLATION .........................................................................................................................................19
ADM800 -INSTALLATION CONSIDERATIONS..............................................................................................................20
ADM800 -MOUNTING INSTRUCTIONS ........................................................................................................................21
ADM800 -INTERIOR SCHEMATIC ...............................................................................................................................22
ADM800 -ELECTRICAL WIRING.................................................................................................................................24
ADM800 -COMMUNICATION CONNECTIONS ..............................................................................................................26
ADM800 -CONNECTING EXTERNAL ALARMS ............................................................................................................28
ADM800 OPERATION ...............................................................................................................................................29
ADM800 -OVERVIEW ................................................................................................................................................30
ADM800 -SCREEN DISPLAYS.....................................................................................................................................31
ADM800 -SYSTEM PROGRAMMING ...........................................................................................................................32
ADM800 -SETUP PROGRAMMING ..............................................................................................................................33
AGM300 -SETUP PROGRAMMING ..............................................................................................................................37
ADM800 -ZONE SETUP PROGRAMMING.....................................................................................................................41
GENERAL OPERATION .................................................................................................................................................44
WORKING WITH ALARMS ............................................................................................................................................50
WORKING WITH THE TREND SCREEN...........................................................................................................................53
WORKING WITH SYSTEM FAULTS ................................................................................................................................54
WORKING WITH THE CALIBRATION SCREEN................................................................................................................57
WORKING WITH THE DIAGNOSTIC SCREEN..................................................................................................................59
SERVICE MODE ...........................................................................................................................................................61
APPENDIX ...................................................................................................................................................................63
AGM300 /ADM800 MAINTENANCE ..........................................................................................................................64
OPTIONAL ACCESSORIES .............................................................................................................................................65
ADM800 -LOGIC DIAGRAM .......................................................................................................................................66
RS-485 COMMUNICATION PROTOCOL .........................................................................................................................67
AGM300 MODBUS RTU OPERATION .......................................................................................................................68
WARRANTY AND SERVICE ....................................................................................................................................81
AGM300 -SPECIFICATIONS ........................................................................................................................................83
ADM800 -SPECIFICATIONS ........................................................................................................................................84

ii Instruction 3015-4275
Introduction
How to Use This Manual
Thank you for investing in a BACHARACH Ammonia Gas Monitoring System.
This manual provides important information on how to install, operate, and service the AGM300 Ammonia Gas
Monitor and ADM800 Ammonia Display Module.
Please Read this Manual Carefully Before Use
If you have a working knowledge of gas monitors, you will find this manual useful as a reference tool. If you are
new to the use of gas monitors, you can educate yourself about the principles of gas detection and the proper
operation of this device by reading this manual thoroughly.

Instruction 3015-4275 iii
Safety Precautions
AC Power Supply
Ensure the source voltage matches the voltage of the product before energizing the equipment. It is highly
suggested that the AGM300 be placed on a separate circuit (with UPS or surge protection).
•A switch or circuit-breaker shall be included in the building installation
•It shall be in close proximity to the equipment and within easy reach of the operator
•It shall be marked as the disconnecting device for the equipment
Protective Grounding
Under no circumstances should this equipment be operated without connection to a protective ground. Doing
so poses a potential shock hazard and is also a violation of electrical safety standards applicable to this type
of equipment.
Explosive Atmosphere
Do not operate this equipment in the presence of flammable liquids, vapors or aerosols. Operation of any
electrical instrument in such an environment constitutes a safety hazard.
Proper Exhaust Venting
It is imperative that the exhaust port on this instrument be properly vented as described in this manual. Failure
to do so constitutes a safety hazard.
Working Inside the Instrument
Extreme care should be exercised when accessing the interior of this instrument. Only qualified electrical
maintenance personnel should perform connections and adjustments. Always de-energize the power supply
before working inside the instrument.
Modifications to the Instrument
Under no circumstances should this instrument be modified without written consent from Bacharach, Inc.
Changes or modifications to this instrument, not expressly approved, will void the warranty.
In Case of Malfunction
Do not continue to use this equipment if there are any symptoms of malfunction or failure. In the case of such
occurrence, de-energize the power supply and contact a qualified repair technician or the nearest Bacharach
Service Center. ONLY provided knockouts are to be used for electrical and communication wiring. Drilling into
the box will void the warranty.
Fusing
AGM300, 120 VAC Input, Power Supply P/N 3015-3167
F1: 0.5 A, 250V Fast Acting, 5mm x 20mm, P/N 604-2538
F2: 250 mA, 250V Fast Acting, 5mm x 20mm, P/N 604-2537
F3: 5 A, 250V Fast Acting, 5mm x 20mm, P/N 604-2539
F4: 63 mA, 250V Fast Acting, 5mm x 20mm, P/N 604-2535
AGM300, 230 VAC Input, Power Supply P/N 3015-3161
F1: 250 mA, 250V Fast Acting, 5mm x 20mm, P/N 604-2537
F2: 125 mA, 250V Fast Acting, 5mm x 20mm, P/N 604-2536
F3: 5 A, 250V Fast Acting, 5mm x 20mm, P/N 604-2539
F4: 32 mA, 250V Fast Acting, 5mm x 20mm, P/N 604-2534
ADM800
F1 & F2: 1 A, 250VAC, Fast Acting, 5mm x 20mm, P/N 3015-4011

iv Instruction 3015-4275
Safety Precautions (Cont.)
Installation Category
Installation Category II, Pollution Degree II, as defined by UL.
Altitude Limit
2,000 meters
Cleaning
USE a dry cloth to clean the outside of the case. DO NOT use soap and water.
Warning Statements
The use of the word WARNING in this manual denotes a potential hazard associated with the use of this
equipment. It calls attention to a procedure, practice, or condition, or the like, which if not correctly performed or
adhered to, could result in personal injury or death.
Caution Statements
The use of the word CAUTION in this manual denotes a potential hazard associated with the use of this
equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly performed or
adhered to, could result in damage to the equipment.
Hazard Symbols on Monitor
This symbol indicates the need to consult this operating instruction
manual when opening the enclosure.
WARNING: A potential risk exists if the operating instructions are not
followed.
This symbol indicates the presence of electric shock hazards when
the enclosure is opened.
WARNING: To avoid risk of injury from electric shock, do not open
the enclosure when power is applied.

Instruction 3015-4275 v
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.

vi Instruction 3015-4275
AGM300 / ADM800 Refrigerant Gas Leak Monitor Mechanical Room Placement
The ADM800 should be mounted outside of the mechanical room or at least just inside of a door to the room.
This is the “split architecture design” for safety of the operator. The ADM800 can be located up to 4500 feet
from the AGM300. The ADM800 is the main interface by which you program the AGM300, acknowledge
alarms, and observe conditions inside of the mechanical room. Note that there are two additional alarm relay
contacts in the ADM800 that can be programmed to alarm with “leak, spill, evacuate, fault or monitor on”.
AGM300
Ammonia
Gas
Monitor
Outside Hallway
Machine Room
Sample Inlet Pickup Points
Chiller
Sample Inlet
Pickup Point
Aux. Horn/Strobe
Remote Alarm Fresh air purge
from area away
from ammonia
gas
Exhaust Fan
ADM800
Ammonia Display
Module outside of
mechanical room

Instruction 3015-4275 1
AGM300 Installation
Upper Mounting
Bracket
Lower Mounting
Br
ac
k
et
Water Trap
STANDARD ACCESSORIES FOR A 4 POINT SYSTEM
5 Line-End Filters (P/N 3015-3420)
AGM300/ADM800 Instruction Manual (P/N 3015-4275)
LED
Indicators

2Instruction 3015-4275
AGM300 - Installation Considerations
Locating the Monitor
The AGM300 should be centrally located in the facility and should be easily accessible for visual monitoring and
servicing. Intake sample lines can be up to 500 feet in length, but it is important to remember that sampling
cycle time is proportional to the total number and length of individual sample lines.
Dirt, grease, and oils can adversely affect the operation of the AGM300. The monitor should be installed out of
direct sunlight in a clean, dry area that is not subject to temperature or humidity extremes. Installation of the
monitor in a mechanical room is acceptable provided reasonable environmental conditions exist. If there is a
question, consider installing the unit outside of the mechanical room in a cleaner area of the facility.
Warnings and Cautions
WARNING – Drilling holes in the AGM300 and
ADM800 enclosure will void the warranty. Please
use knockouts provided for electrical connections.
WARNING - Do not operate this equipment in the
presence of flammable liquids, vapors or aerosols.
Operation of any electrical instrument in such an
environment constitutes a safety hazard.
WARNING - Always de-energize the power supply
before working inside the instrument.
CAUTION - The AGM300 contains sensitive
electronic components that can be easily damaged.
Be careful not to touch or disturb any of these
components.
Inspection
The AGM300 has been thoroughly inspected and tested prior to shipment from the factory. Nevertheless, it is
recommended that the monitor be re-checked prior to installation. Inspect the outside of the enclosure to make
sure there are no obvious signs of shipping damage. Open the door latches and inspect the interior of the
instrument for loose components that may have become dislodged during shipment. If damage is discovered,
please contact the nearest Bacharach Service Center for assistance.