Ammonia Gas Monitor – Multi Zone AGM-MZ Ammonia Gas Monitor – Multi Zone Instruction 3015-5113 Installation / Operation / Maintenance Rev. 2 - June 2010 UL 61010-1 CAN/CSA 22.2 No.61010.
Ammonia Gas Monitor – Multi Zone WARRANTY Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in material and manufacture and will conform substantially to Bacharach Inc.'s applicable specifications. Bacharach's liability and Buyer's remedy under this warranty are limited to the repair or replacement, at Bacharach's option, of this Product or parts thereof returned to Seller at the factory of manufacture and shown to Bacharach Inc.
Ammonia Gas Monitor – Multi Zone Table of Contents 1 INTRODUCTION .......................................................................................................................................... 5 About This Manual ....................................................................................................................................... 5 Warning Statements.................................................................................................................................
Ammonia Gas Monitor – Multi Zone 3 SETUP PROGRAMMING ...........................................................................................................................25 Display Screens..........................................................................................................................................25 Initial Power Up ...................................................................................................................................... 25 Data Display Screen .
Ammonia Gas Monitor – Multi Zone 4–20 mAdc Interface Board ................................................................................................................... 44 Replacement Parts & Optional Accessories .............................................................................................. 44 Replacement Parts................................................................................................................................. 44 Item Description ...........................
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Ammonia Gas Monitor – Multi Zone 1 Introduction About This Manual Thank you for investing in a Bacharach AGM-MZ Ammonia Gas Monitor. To assure operator safety and the proper use of the AGM-MZ please read the contents of this manual, which provides important information on the installation, operation, and maintenance of the monitor. If you have a working knowledge of gas monitors, you will find this manual useful as a reference tool.
Ammonia Gas Monitor – Multi Zone Safety Precautions AC Power Supply The AGM-MZ uses a universal power supply that is capable of accepting inputs of 100 to 240 VAC, 50/60 Hz. The monitor’s power consumption is 20 Watts. It is highly recommended that the monitor be connected directly to the AC power source, preferably on its own circuit with UPS or surge protection. A switch or circuit breaker must be included in the building installation.
Ammonia Gas Monitor – Multi Zone Functional Overview General Description Ammonia gas monitors are specified to support compliance to federal, state and local safety codes governing emissions. Avoiding significant gas loss reduces equipment replacement costs, maintains equipment efficiency, promotes safety, and protects the environment. The Bacharach AGM-MZ provides continuous monitoring of ammonia gas levels in up to 16 separate test zones.
Ammonia Gas Monitor – Multi Zone The AGM-MZ should be centrally located in the mechanical room and be readily accessible for easy visual monitoring and servicing. The combined length of sample tubing, plus exhaust tubing, should not exceed 500ft. for any zone. The fresh air purge line should draw from an area that does not contain any ammonia gas. The exhaust line should run to an outside location if possible. The combined length of the purge line and the exhaust line cannot exceed 600 feet.
Ammonia Gas Monitor – Multi Zone 2 Installation AGM-MZ Front View Display Screen Solenoid Connections LED Indicators RED: Alarm YELLOW: System fault GREEN: Monitor is powered on *Open cover for mounting instructions (page11) Standard Accessories for a 4-Point System 5 Line-End Filters (P/N 3015-3420) AGM-MZ Instruction Manual (P/N 3015-5113) Instruction 3015-5113 9
Ammonia Gas Monitor – Multi Zone Installation Considerations Warnings & Cautions WARNING: Explosion hazard! Do not mount the AGM-MZ in an area that may contain flammable liquids, vapors or aerosols. Operation of any electrical equipment in such an environment constitutes a safety hazard. WARNING: Shock hazard! Always disconnect AC power before accessing the interior of the monitor. CAUTION: Drilling holes in the AGM-MZ enclosure may damage the unit and will void the warranty.
Ammonia Gas Monitor – Multi Zone Mounting Instructions The AGM-MZ should be installed plumb and level and securely fastened to a rigid mounting surface. The enclosure utilizes keyhole mounting brackets designed for 1/4 inch fasteners. Locate the four screws as shown in the diagram below or by using the provided mounting template (P/N 3015-5109). Allow the screw heads to protrude approximately 1/4".
Ammonia Gas Monitor – Multi Zone Connecting Air Lines Overview Individual sample lines are run from the AGM-MZ to each area of the facility to be monitored. Additionally, a purge line is installed to provide clean air for resetting the infrared zero baseline. All air line connections, located on the left side of the enclosure, are displayed below.
Ammonia Gas Monitor – Multi Zone Line-end filters should be placed close to the ceiling since ammonia is half the density of air and therefore rises. IMPORTANT: DO NOT block any of the zones. Unused zones may be disabled by setting their length parameter to zero feet in the zone setup screen. Please refer to the earlier section Suggested Location of Sampling Points to learn more about where to place the ends of the sample intake lines.
Ammonia Gas Monitor – Multi Zone Interior Schematics Gas inlet IR Bench 10-PIN Connector (Detector) Gas Outlet 12-PIN Connector (IR Source) IR Source Connector J5 DET Connector J6 *NOTE: The plastic cable ties surrounding the air pump are to ensure safe handling during shipping. Please remove before operation. Reinstall a plastic cable around the air pump if the unit is shipped to Bacharach, Inc. for service or repair. This prevents damage during shipping.
Ammonia Gas Monitor – Multi Zone AC Power / RS-485 / Relay Connector / 4-20 mAdc Current Loop AC Input Terminals Relay Connectors: Leak, Spill, Evacuate, Fault RS-485 Connector Switches / Fuses Line Fuses (1 Amp, 250 V) Factory Default CPU Reset Instruction 3015-5113 15
Ammonia Gas Monitor – Multi Zone Electrical Wiring The AGM-MZ uses a universal power supply that is capable of accepting inputs of 100 to 240 VAC, 50/60 Hz. The monitor’s power consumption is 20 Watts. It is highly recommended that the monitor be connected directly to the AC power source, preferably on its own circuit. The AC power connection should be completed with UL approved 3-conductor wire (minimum 16 AWG), rated 300 VAC at 105°C.
Ammonia Gas Monitor – Multi Zone Connecting Communication Devices Remote Display Module (AGM-RD) Connection The AGM-MZ is connected to the AGM-RD using a shielded twisted pair instrument cable. The maximum distance between the farthest away AGM-MZ and AGM-RD is 4500 feet. Use any of the remaining service knockouts to gain access to the interior of the monitor.
Ammonia Gas Monitor – Multi Zone Changing Terminator Switch Settings The terminator switch is shipped from the factory in the terminated or “IN” position. This is the correct setting if the AGM-MZ is connected as a single device, or if it is the last device on the network chain. If the AGM-MZ is to be installed in the middle of a network, the terminator must be moved to the “OUT” position. Locate the switch (#4) and determine its position. If it must be moved, slide the switch to the appropriate position.
Ammonia Gas Monitor – Multi Zone Multiple AGMs TERMINATOR “IN” Multiple AGM-MZs With AGM-RD NOTE 1: The last AGM-MZ or AGM-RD on either end of the network must have its terminator in the “IN” position, and all other units must have their terminators in the “OUT” position. AGM-RD NOTE 2: The total length of the RS-485 cable cannot exceed 4500 feet. (Use instrument cable 20 gage multi-strand shielded and twisted pair – similar or equal to Belden cable #8762.
Ammonia Gas Monitor – Multi Zone Multiple AGM-MZs Connected to a Building Management System Daisy Chain Fashion BUILDING MANAGEMENT SYSTEM RS-485 TERMINATOR “IN” AGM-MZ UNIT 1 NODE 1 TERMINATOR “OUT” AGM-MZ UNIT 2 NODE 2 AGM-MZ UNIT 3 NODE 3 TERMINATOR TERMINATOR TERMINATOR “OUT” “IN” “OUT” AGM-MZ UNIT 4 NODE 4 PC Software NOTE 1: The AGM-MZ is compatible with AGM300 PC software version 1.52 and higher.
Ammonia Gas Monitor – Multi Zone 7. Go to EDIT. From the EDIT Menu, select ZONES. Select a specific zone to identify and set parameters. Make a selection from the gas library for that zone. 8. Setting the Alarms: Select EVAC LEVEL. Use the Backspace key to clear previous setting. Type in the new PPM level. Use the same method to set the spill level and leak level. 9. To close or bypass a zone: Set the DISTANCE to 0 feet.
Ammonia Gas Monitor – Multi Zone Current Loop Interfaces Optional 4–20 mAdc Outputs Upon installation of the optional 4–20 mAdc Interface Board (page 14) (P/N 3015-5152), the AGM-MZ has the capability of providing dual 4-20 mAdc scrolling current loop outputs for connection to external monitoring devices. Loop outputs are powered internally. Do not use an external power supply as this can damage the loop card.
Ammonia Gas Monitor – Multi Zone Connecting External Alarms Overview Each AGM-MZ includes 4, Form C, SPDT relays. The contacts are rated 2A at 250 VAC (inductive) 5A at 250 VAC (resistive). These relays are used for the connection of external alarm devices. The relays are factory assigned to the following conditions: Relay #1 Leak Relay #2 Spill Relay #3 Evacuate Relay #4 Fault Connection Use the AC conduit or any of the remaining service knockouts to gain cable access to the interior of the monitor.
Ammonia Gas Monitor – Multi Zone Typical AGM-MZ Relay 1 and Relay 2 Wiring Red* Yellow* Leak / Spill / Evacuate / Fault NC COMMON NO RELAY *The colors correspond to the LEDs on the front of the case. Normal configuration: Strobes are usually connected to the Leak relay (#1) Strobe or Horn Horns are usually connected to the Spill relay (#2). LINE NEUTRAL External Power: LINE POWER AC < 250V DC < 15W Note: The device does not power accessories; power must come from an external source.
Ammonia Gas Monitor – Multi Zone 3 Setup Programming Display Screens Initial Power Up When the AGM-MZ is powered up, all front level panel LEDs will illuminate and a splash screen will appear, displaying the monitor’s firmware version level. After a moment, the Warm Up screen will be displayed and the green MONITOR ON light will blink. After a 15 minute warm up cycle, the MONITOR ON light will glow steadily and the Data Display screen will be displayed.
Ammonia Gas Monitor – Multi Zone Navigating to the 2nd Setup Screen From AGM System Setup Screen #1, select the SYSTEM option to go to AGM System Setup Screen #2. Select the ESC key to return to the System Setup Screen #1. AGM System Setup Screen #2 Location This is the name you assign to the AGM-MZ to identify its location. It may have up to 12 alphanumeric characters. 1. Press the ENTER key to adjust the setting. 2.
Ammonia Gas Monitor – Multi Zone Audible Alarm This parameter selects the function of the AGM-MZs internal audible alarm device. 1. Press the ENTER key to adjust the setting. 2. Use the UP/DOWN cursor keys to select unused, monitor on, evacuate, spill, leak, fault, or alarm. 3. Press ENTER to accept the new entry or ESC to revert to the previous setting. Zone Hold Mode A zone can be placed on hold and continuously monitored for a length of time determined by the Zone Hold Time value.
Ammonia Gas Monitor – Multi Zone Navigating to the 3rd Setup Screen From AGM System Setup Screen #2, select the MORE option to go to AGM System Setup Screen #3. Select the BACK option to return to AGM System Setup Screen #2. AGM System Setup Screen #3 NOTE: The RS485 BAUD rate text will be replaced by “Service Timeout” when in Service Mode. Service Timeout Displayed in Service Mode. Sets the length of time the Service Mode is in effect.
Ammonia Gas Monitor – Multi Zone Accessing Additional Features Several additional features can be viewed on the System Setup Screen #3 when the AGM is placed in service mode (refer to Service Mode on page 43). While in service mode, the user can identify the model number, set digipot values and sensor temperature, and acquire the temperature coefficient.
Ammonia Gas Monitor – Multi Zone 4 General Operation Functional Overview Normally each AGM-MZ will sequentially perform measurements on its active zones without user input. The total time it takes an AGM-MZ to complete a measurement cycle is directly proportional to the number of active zones and the physical length of the air lines. Monitors linked together on a network operate independently of each other and consequently complete their respective measurement cycles at different rates.
Ammonia Gas Monitor – Multi Zone Distance This displays the combined length of the sample tubing plus any tubing on the exhaust port. Total length should not exceed 500 ft. 1. Press the ENTER key to adjust the setting. 2. Use the LEFT/RIGHT cursor keys to move across the entry field and the UP/DOWN cursor keys to modify the individual characters. 3. Press ENTER to accept the new entry or ESC to revert to the previous setting. Zone Temperature This displays the air temperature at the zone being sampled. 1.
Ammonia Gas Monitor – Multi Zone Leak Level This is the concentration level in PPM that will activate a leak alarm condition. 1. Press the ENTER key to adjust the value. 2. Use the UP/DOWN cursor keys to modify the setting. 3. Press ENTER to accept the new entry or ESC to revert to the previous setting. NOTE: This value must be less than the spill level. Spill Level This is the concentration level in PPM that will activate a spill alarm condition. 1. Press the ENTER key to adjust the value. 2.
Ammonia Gas Monitor – Multi Zone Responding to Alarms An operator can respond to the alarms by accessing the Alarm Summary Screen. Navigate to this screen by selecting ALARM on the first (Data Display) screen. Alarm Summary Screen The Alarm Summary Screen displays a list of all alarm conditions pending across the network. The screen is divided into 8 boxes, and each box represents a single alarm.
Ammonia Gas Monitor – Multi Zone This screen provides the following navigation options at the bottom of the display: ACK Using the left arrow key, acknowledges the alarm as described in the next section SETUP Using the right arrow key, navigate to the Zone Setup Screen #1. This enables review of the zone setup parameters and access to the Trend Screen. Use the ESC button on the front case to go back to the previous menu.
Ammonia Gas Monitor – Multi Zone Depending on the nature of the fault, the AGM-MZ may or may not continue to operate normally. Under a non-critical fault condition, the AGM-MZ will continue to measure and log data, but some peripheral functions may be compromised. Under a critical fault condition, action is required for the AGM-MZ to operate normally. The table on the following page lists the various fault conditions and explains what action should be taken to correct the problem.
Ammonia Gas Monitor – Multi Zone Non Critical Faults BOX TEMP FAULT – Enclosure’s internal temperature is outside normal range (or IR sensor has failed). Check the installation to verify that the monitor is not being subjected to extreme temperatures. Verify that the ventilation holes are not obstructed. Refer to the Diagnostic Screen for the ZERO temperature, BNCH temperature and BOX temperature. Call the factory with this information for further instructions.
Ammonia Gas Monitor – Multi Zone Viewing Fault Log A data log of the last 20 fault conditions is retained in memory. On the Fault Screen, select the LOG option to view a display of the fault log. Fault Log Screen This screen lists potential fault conditions in the left column and displays a check mark indicating which problems were associated with each fault condition as represented by the vertical cursor bar.
Ammonia Gas Monitor – Multi Zone The Trend Screen Navigating to the Trend Screen From the Zone Screen, select the Trend option on the bottom left side. This will open the Trend screen. Trend Screen The trend graph opens with the cursor located over the most recent data point. Use the LEFT/RIGHT cursor keys to move the cursor to different data points. Holding a key down will cause the cursor to move rapidly across the screen.
Ammonia Gas Monitor – Multi Zone Navigating to the Calibration Screen On the System Setup screen, select the Calibration option (CAL). Calibration Screen Adjusting Calibration Factor The factory default cal factor for standard units is 1.000. This value may be different if the high accuracy option is ordered. Proceed as follows to adjust the current calibration factor: 1. Use the PREV GAS or NEXT GAS options to select the appropriate gas. 2. Select the CAL FACTOR option to edit the value. 3.
Ammonia Gas Monitor – Multi Zone Programming New Gasses As new gasses come into use, the AGM-MZ allows the addition of these new gases to its gas library. At the end of the gas library list is an option labeled CUSTOM for adding new gases. From the Calibration Screen use the LEFT/RIGHT arrows to select CUSTOM from the list. Next, press ENTER, and use the UP/DOWN arrow keys to enter the calibration factor. The selection of the matching gas and CAL factor is performed by Bacharach by analyzing the new gas.
Ammonia Gas Monitor – Multi Zone The Diagnostic Screen Navigating to the Diagnostic Screen On the System Screen, select the AGM-MZ unit you wish to view and press ENTER to access that monitor’s Setup Screen. On the Setup Screen, select the Diagnostic option (DIAG) to access the Diagnostic Screen. Diagnostic Screen 01 ZONE 1 LOC DET 4.2251V AVE 4.2273V ZERO 4.2267V NOISE 0.0009V AVEAU 0.00014 UM/L 0.000B PPM 0.7B Optical Sensor Output Voltages F F F R717 NOW ZERO DELTA F BENCH 27.78C F BOX 29.
Ammonia Gas Monitor – Multi Zone NOISE: A 16 point running average of the noise portion of IR bench output. This reading is valuable mostly when ammonia is not present. AVEAU: Average Absorbency – Optical absorbency computed from the Average Detector Voltage and Zero Voltage. In the absence of ammonia, the absorbency is 0.000AU. When sampling ammonia, its value varies proportionally with the concentration.
Ammonia Gas Monitor – Multi Zone 5 Maintenance Warnings & Cautions WARNING: Shock hazard! Always disconnect AC power before opening the enclosure of the monitor. CAUTION: The AGM-MZ contains sensitive electronic components that can be easily damaged. Do not touch nor disturb any components. Do not dislodge electrical wiring or pneumatic tubing. Hydrophobic Filter The hydrophobic filter prevents water from entering the IR detector.
Ammonia Gas Monitor – Multi Zone 4–20 mAdc Interface Board The optional 4–20 mAdc Interface Board (P/N 3015-5152) allows the operator to take advantage of the current loop interfaces provided for connection of external devices to the AGM-MZ. The interface board plugs into the sockets provided on the valve/pump drive PCB, and the external devices are then cabled to the AGMMZ as described earlier in this manual.
Ammonia Gas Monitor – Multi Zone Specifications AGM-MZ Specifications Product Type The AGM-MZ provides multiple area monitoring system for low level continuous monitoring of Ammonia gasses used in most commercial systems. System design supports compliance to the gas monitoring requirements of ANS/BSR ASHRE 15-1994.
Ammonia Gas Monitor – Multi Zone Appendix A Recommended Alarm Settings & Gas Enumeration Gas Leak PPM Spill PPM Evacuate PPM Ammonia / NH3,/ R-717 50 150 300 Allowable Exposure Level (AEL) ASHRAE 34-1992.
Ammonia Gas Monitor – Multi Zone Appendix B RS-485 Communication Protocol Overview The following instructions are intended as a guide for integrating the AGM-MZ network into a Building Management System. If you are unfamiliar with complex systems of this type, it is recommended that you contact Bacharach for technical assistance. MODBUS RTU Protocol The AGM-MZ monitor communicates with master devices (such as the AGM-RD or a Building Management System) over the RS-485 serial interface.
Ammonia Gas Monitor – Multi Zone AGM-MZ MODBUS RTU Operation Overview The AGM-MZ and AGM-RD are equipped to communicate with other equipment using the MODBUS RTU protocol. Using this communication channel a MODBUS master device may communicate with up to 15 AGM-MZs on a communications network, exchanging measurement information, alarm data, fault data, history (logs and trends) and setup information.
Ammonia Gas Monitor – Multi Zone not, the message is not passed through. The AGM-RD does not make any modifications to MODBUS messages. It simply passes the query through to the AGM-MZ, and passes the response back to the MODBUS master. In other words, it allows the AGM-MZs to be logically connected to the MODBUS network, when physically they are connected to the local AGM-RD network.
Ammonia Gas Monitor – Multi Zone Summary of Registers Register Name Number HEX Decimal Description System Data 0x0010 16 R/W AGM System Setup Data Status 0x0011 17 R/W Operating summary of faults, alarms and status Zone Data 0x12xx 4609 4630 R/W Setup data for up to 16 zones (xx defines zone number) CAL Data 0x0014 20 R/W Cal Factors for all gases Date/Time 0x0015 21 R/W Set AGM-MZ date & time Sensor Data 0x0016 22 R Raw measurement of sensors Rel.
Ammonia Gas Monitor – Multi Zone System Data Register Register 0x0010hex Variable Type Length Description Type UI 2 bytes Indicates EEPPROM has been initialized if value = 300 DO NOT MODIFY REV Float 4 bytes Firmware Rev Level DO NOT MODIFY SN UI 2 bytes Firmware Serial Number DO NOT MODIFY Node UC 1 byte Network Slave Node # (valid values are 1-15). The default is that indicated by the Node DIP Switch on main board.
Ammonia Gas Monitor – Multi Zone Status Register Register 0x0011hex 17dec R/W 10 bytes Variable Type Length Description Mode UC 1 byte Defines Operating Mode of AGM-MZ. 0 = normal Mode; 1 = Zone_Hold Mode; 2 = Diagnostic Mode; 3 = Service mode. DO NOT MODIFY (use zone hold register or service mode register to change this parameter) State UC 1 byte Defines AGM-MZ Current State.
Ammonia Gas Monitor – Multi Zone Zone Data Register 0x12xxh R/W 78 bytes Each zone for an AGM-MZ has a separate Zone data structure that is 78 bytes long. The zone number is the low order byte in the register address (i.e., Zone 1 data register = 0x1201h) Variable Type Length Description Location C 13 bytes 13 byte array, Alpha Numeric Description or Name of Zone Flow OK UC 1 byte Status of Flow check. Value of 1 indicates flow check is good.
Ammonia Gas Monitor – Multi Zone register. This will cause the alarm to be “silenced” in the AGM-MZ (i.e., the alarm relays will return to their normal state and the ALARM lamp will be extinguished). The next time the zone with the alarm condition is sampled, if the alarm condition still exists, the alarm will be reactivated and the alarm parameter will be reset to “1” in the AGM-MZ. Otherwise, if the alarm condition has cleared, no further action is required and normal operation will resume. 3.
Ammonia Gas Monitor – Multi Zone Date Time Register Register 0x0015h 21dec R/W 14 bytes Variable Type Length Description Date_Time Time 14 bytes Contains current time and date. Structure is defined as in note 2 of zone data Time Structure Format consists of 14 unsigned character types.
Ammonia Gas Monitor – Multi Zone Release Zone Hold Register Register 0x0017h 23dec W Variable Type Length Description Rel_Hold * * See description of STATUS REGISTER Hold Zone Register Register 0x0018h 24dec W Variable Type Length Description Zone_Hold * * See description of STATUS REGISTER 10 bytes 10 bytes AGM-MZ Hold Mode The AGM-MZ can be made to hold or “dwell” on a particular zone if necessary.
Ammonia Gas Monitor – Multi Zone Fault Log Register Register 0x1900, 0x1901h 6400, 6401dec R 302 bytes These registers contain the 20 most recent fault events, the time they occurred, and a pointer to the most recent event. The data is split into 2 registers. The first register contains 200 bytes and the second register contains 102 bytes.
Ammonia Gas Monitor – Multi Zone Release Service Mode Register Register 0x001Chex 28dec W 10 bytes Variable Type Length Description Ent Svc_Mode * * See description of STATUS REGISTER AGM-MZ Service Mode The AGM-MZ can be placed into service mode if necessary. During service mode the unit will take no measurements, any and all alarms are silenced, and all relays are opened.
Ammonia Gas Monitor – Multi Zone MODBUS Exception Responses The following MODBUS exception responses are supported by the AGM-MZ: 01 Illegal Function 02 Illegal Data Address 06 Slave Device Busy (Occurs only when AGM-MZ is connected to the bus through an AGM-RD and the AGM-RD is not in the SYSTEM or ZONE VIEW screen) Instruction 3015-5113 59
Ammonia Gas Monitor – Multi Zone Appendix C Select the zone in screen & press ENTER OR Select ZONES on 60 Instruction 3015-5113
Ammonia Gas Monitor – Multi Zone Select the zone in the & press ENTER OR Select ZONES on Instruction 3015-5113 61
Ammonia Gas Monitor – Multi Zone NOTES:
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