AGM-SZ Ammonia Gas Monitor - Single Zone Instruction 3015-4286 Installation / Operation / Maintenance Rev. 3 August 2009 UL 61010-1 CSA 22.2 No.
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.
Table of Contents INTRODUCTION........................................................................................................................................... 1 How to Use This Manual ......................................................................................................................... 1 Warning Statements................................................................................................................................ 1 Caution Statements .........................
Fault Codes......................................................................................................................................... 19 Clearing the Stored PPM Log, Alarm & Fault Data ........................................................................... 20 The P-CHK Function ............................................................................................................................. 20 Overview ............................................................................
Introduction How to Use This Manual Thank you for investing in a BACHARACH AGM-SZ (Ammonia Gas Monitor - Single Zone). This manual provides important information on how to install, operate, and service the AGM-SZ monitoring unit. To assure operator safety and the proper use of the monitor, please read, understand, and follow the contents of this manual. If you have a working knowledge of gas monitors, you will find this manual useful as a reference tool.
Safety Precautions AC Power Supply The AGM-SZ 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 15 Watts. It is highly suggested 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 rated 1.0 A, 250 VAC, with a minimum terminal spacing of 3.0 mm must be attached to the monitor’s AC power leads.
Functional Overview General Description Ammonia monitors are specified to support compliance to federal, state and local safety codes governing gas emissions. Avoiding significant ammonia loss reduces equipment replacement costs, maintains equipment efficiency, promotes safety, and protects the environment. The Bacharach AGM-SZ (Ammonia Gas Monitor Single Zone) is designed to continuously test for the presence of ammonia gas in an area that is located up to 500 ft (152.4 m) away from the monitor.
Suggested Location of Sampling Point At the point of an ammonia gas leak the gas is nearly pure. As ammonia gas is dispersed into the air, the gas molecules diffuse causing a dilution of the original concentration. The AGM-SZ measures the gas concentration at the 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 monitor will read a diluted mixture of ammonia gas and air.
Installation Installation Considerations Warnings & Cautions WARNING: Explosion hazard! Do not mount the AGM-SZ 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 working inside the monitor. CAUTION: Drilling holes in the AGM-SZ enclosure may damage the unit and will void the warranty. Please use knockouts provided for electrical connections.
Mounting Instructions The AGM-SZ should be installed plumb and level and securely fastened to a rigid mounting surface. The enclosure utilizes keyhole mounting designed for ¼ inch fasteners. Install the four screws as displayed in the diagram below or by using the provided mounting template. Allow the screw heads to protrude approximately ¼ inch.
Tubing Considerations Use ¼ in. outside diameter (0.040 in. wall) flex tubing for all air lines (P/N 304-2742 or equivalent). The tubing should be clean and free of moisture or other contaminants. The tubing should be cut cleanly with a sharp knife and care should be taken not to distort the tubing end. IMPORTANT! Due to the reactive nature of ammonia gas, it is important to use materials that will not absorb the gas as it passes through the sampling system.
Interior Schematic Line Fuses 1.0A, 250V, F AC Input Ground Stud AC Input Terminals Factory Default Reset Switch CPU Reset Switch Hydrophobic Filter Hydrophobic Filter Purge Air In External Alarm Relay Connector Sample Pump 4–20 MA Connector (Signal Out. Do not apply power!) IR Bench Gas Out* IR Bench Gas In* *For IR Bench Gas In/Out, See AGM-SZ Bottom View drawing on page 6.
Electrical Wiring The AGM-SZ 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 15 Watts. It is highly recommended that the monitor be connected directly to the AC power source, preferably on its own circuit. The connection should be completed with UL approved multi-conductor wire (minimum 16 AWG), rated 300 VAC at 105°C. Locate a convenient service knockout and install electrical conduit in the typical manner.
Connecting External Alarms Overview The AGM-SZ includes four SPDT relays whose contacts are rated 2 A at 250 VAC (inductive) 5 A at 250 VAC (resistive). These relays are used for the connection of external alarm devices that are activated when the relay is energized.
Typical External Alarm Relay 1 Wiring Jumper the ‘Neutral’ line of an external power source or the monitor’s AC input to the ‘Common’ terminals on the relay connector. Connect one end of the strobe or horn to the ‘NO’ terminal of whichever level of alarm is appropriate for the application. The other end of the strobe or horn is connected to the other leg of the external power source. For protection, install an in-line fuse of the appropriate size and design for the external alarm device being used.
Notes: 12 Instruction 3015-4286
Operation Front Panel Display & Controls Display Screen ENTER Press this button to: 1) Clear peak reading 2) Save a function screen’s displayed value SILENCE / QUIT Press this button to: Keypad Use these buttons to: MONITOR ON Light (Green) SYSTEM FAULT Light (Yellow) ALARM Light (Red) 1) Enter function mode and then move arrow (>) on screen to the desired function 1) Flashes during warm-up Flashes when any one or more of the faults listed on Page 19 occur Flashes when the detected gas level exceed
If a system fault occurs (see Fault Code list on Page 19), the monitor responds by turning ON the front panel SYSTEM FAULT (yellow) light and energizing the fault relay. If the internal audible alarm is turned ON, it too will activate (AUDALRM page 16). An optional external alarm device can be connected to the fault relay to alert personnel that a system fault has occurred (Page 10).
Function Screens The Function screens are used to display stored data and to set up the monitor. From the Data Display screen, press any Keypad button to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) on the display until it is next to the desired function, and then press the ENTER button to select that function.
DIAGNOS – Enters the diagnostic function. Press the Up Arrow Keypad button to toggle between the monitor’s two diagnostic screens. Refer to The DIAGNOS Function (Page 21). 4.26500v 24.5cD <0000> 14.00psi 0.4ppm 0.00 0.00002au 4.260v GASTYPE – Ammonia monitors do not have a library of other gases to choose from, therefore R717 is the only gas type listed. Press QUIT to return to the previous screen. LEAKLVL – Sets the Leak Alarm level, adjustable from 1 to 300 ppm. Factory default is 100 ppm.
CLOCK – Sets the monitor’s date and time. Use the Keypad to enter the correct date and time, and then press ENTER to save those values and return to the previous screen. Note that time is displayed in a 24 hour format, while the date is displayed as mm/dd/yy. SILENCE – Used to enter a length of time for which the internal audible alarm and the external alarm are turned OFF when the front panel SILENCE button is pressed. The factory default is 300 seconds (5 minutes).
Gas Alarms Overview If the ammonia gas ppm level in the area being monitored exceeds its preset Leak, Spill, or Evacuate Alarm level (Page 16), the AGM-SZ will detect this alarm condition and turn ON the front panel ALARM light. Additionally, an external alarm device may activate and the monitor’s internal audible alarm may sound if those features have been enabled (Pages 10 & 16).
Viewing the Fault Log From the Data Display screen, use the Keypad buttons to place the arrow (>) on the display next to the FAULTS function. Then press ENTER to display the fault log. #03 <0800> @ 11/12/03 08:17 #04 <0000> @ 11/12/03 08:30 FAULT CODE<1800> 12 ZONE FLOW FAULT CODE<1800> 13 PURGE FLOW The fault log shows the monitor’s current fault status.
Clearing the Stored PPM Log, Alarm & Fault Data Up to 200 gas measurements, and 30 alarm and fault events are stored by the monitor. To clear stored data, first display the data to be cleared by using the PPM LOG, ALARMS or FAULTS function (Page 15). Next, press the Right Arrow Keypad and ENTER buttons at the same time. A single, long tone should be heard when the data has been successfully cleared.
The DIAGNOS Function Overview The DIAGNOS function displays sensor data and status information useful to a service technician for troubleshooting various fault conditions. Explanations of the data shown in these screens are given below. Keypad Functions From the Data Display screen, use the Keypad buttons to place the arrow (>) on the display next to the DIAGNOS function. Then press ENTER to display the first of two Diagnostic screens.
The Calibration Function Overview If greater than standard accuracy is desired, the factory’s default calibration factor of 1.000 may be adjusted by performing the calibration procedure as described below, and then selecting the monitor’s CAL function to enter the new calibration factor. IMPORTANT! Changing the calibration factor will VOID the factory calibration. Typically, the monitor will remain within the factory-calibrated accuracy indefinitely and no calibration is required.
Maintenance Warnings & Cautions WARNING: Always disconnect AC power before working inside the monitor. CAUTION: When working inside the monitor, be very careful not to dislodge any electrical wiring or pneumatic tubing. The AGM-SZ contains sensitive electronic components that can be easily damaged. Be careful not to touch or disturb any of these components. Hydrophobic Filters Hydrophobic Filters (Page 8) located in both the gas-sample and purge lines prevent water from entering the IR detector.
Replacement Parts & Optional Accessories Replacement Parts Item Description Part Number AGM-SZ complete assembly 3015-4280 Battery: 204-0020* Filters: Charcoal, Zero Air 3015-4306 Hydrophobic 07-1650 Termination (gas sample line) 3015-3420 Fuse: 1.0 A, 250 V, Type “F” 04-2620 Replacement Pump 3015-5176 Tubing: ¼ in OD by the foot 304-2743 250 ft.
Service Centers Replacement parts and service can be obtained by contacting one of the following Bacharach Service Centers. United States México Bacharach, Inc. 621 Hunt Valley Circle New Kensington, PA 15068 Phone: 724-334-5051 Fax: 724-334-5723 Email: help@mybacharach.com Bacharach de México Playa Regatas No. 473 Tercer Piso Col. Militar Marte Delegación Iztacalco, 08830 México D.F. México Phones: +52-555-634-7740 +52-555-634-7741 FAX: +52-555-634-7738 Email: bacharach@prodigy.net.
Specifications Product Type......................... Single zone infrared monitoring system for low level continuous monitoring of ammonia refrigerant gas used in most commercial refrigeration systems Gas........................................ Ammonia / NH3 / R-717 Measuring Range.................. 25 to 10,000 ppm Detector Type ....................... Infrared, Non-Dispersive Coverage .............................. Single zone Monitoring Distance .............. Up to 1,200 ft (365.
Notes: Instruction 3015-4286 27
Headquarters: 621 Hunt Valley Circle, New Kensington, PA 15068 PH: 724-334-5000 • Toll Free: 800-736-4666 • FAX: 724-334-5001 Website: www.mybacharach.com • E-mail: help@mybacharach.com Printed in U.S.A. ® Registered Trademark of Bacharach Inc.
