HGM300 / RDM800 Refrigerant Monitoring System Instruction 3015-4149 Installation & Operation Mini Manual Rev. 5 – November 2004 SECTION 1 (Page 2) Introduction, standard accessories and mounting specifications. SECTION 2 (Page3) Suggested location of HGM300/RDM800 and pickup points. SECTION 3 (Page 4) Wiring HGM300/RDM800. SECTION 4 (Page6) Basic HGM300/RDM800 system connection. SECTION 5 (Page 11) Multiple HGM connections.
SECTION 1 Introduction Welcome – This mini manual is an introduction to the installation and operation of the HGM300/RDM800 refrigerant monitoring system. For detailed installation / operation / maintenance information, please refer to Instruction 3015-4148.
SECTION 2 HGM300 / RDM800 Refrigerant Gas Leak Monitor Mechanical Room Placement The HGM300 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 refrigerant gas and cannot exceed 300 feet in length. The exhaust line should run to an out side location if possible.
SECTION 3 Wiring the HGM300 AC Power (In / Out) -- RS485 -- 4-20 mAdc Node Address Switch Dual 4-20 mAdc Outputs SIGNAL OUT ONLY On/Off Power Switch RS485 Main 120Volt Power Auxiliary Power 120Volt (Used to supply power for audio/visual alarms) Dual 4-20 mA Interface Board P/N 3015-31333 Leak, Spill, Evacuate & Fault alarm wiring block 4
Wiring the RDM800 HGM300 RS485 Connector Terminator for Building Automation RS485 Connector Building Automation System RS485 Connector RDM800 relays Main Power Terminator for HGM300 RS485 Connector 5
SECTION 4 Basic HGM300/RDM800 Monitor System Connection Most applications for the Bacharach HGM300/RDM800 monitor systems will consist of a single HGM300 and a single RDM800. The HGM300 should be mounted in the mechanical room and the RDM800 should be located in a control room, on an outside wall of the mechanical room or at least, just inside the door to the mechanical room. Connect power to the HGM300 using the two-lead connector on the far right bottom of the power supply PC board.
HGM300 WIRING SCHEMATIC OPTIONAL DUAL LOOP 4-20 MADC COMMON ALARM RELAYS 5 AMP, 240 VDC MAIN PWR BKR COMMON LOOP 1 ZONE LOOP 2 PPM RS485 B A GND LEAK SPILL EVACUATE SYS FAULT 1C NO NC 2C NO NC 3C NO NC 4C NO NC L N L N AUX PWR MAIN PWR GND SPECIAL NOTE: TO ESTABLISH THE RS485 COMMUNICATION LINK WITH THE RDM800 OR WITH A BUILDING MANAGEMENT SYSTEM, USE #18 GAGE AWG, MULTI-STRANDED, SHIELDED AND TWISTED PAIR, INSTRUMENT CABLE.
HGM300 Relay Connector 4 Relay #4 NC Relay #3 NO NC NO Relay #2 COMMON NC NO COMMON Relay #1 3 COMMON 2 Fault NC 1 Alarm NO Alarm COMMON Alarm Horn Strobe Neutral Main Power Line Neutral Line Aux. Power Jumper the ‘Neutral’ of the auxiliary power connector to the ‘Common’ on the relay block. Connect one end of strobe or horn to the ‘NO’ of whichever level of alarm is appropriate for application.
RDM800 INTERIOR VIEW MAIN POWER RS-485 TO MONITOR RS-485 TO HOST RDM800 EXTERNAL ALARM RELAYS 9
RDM800 WIRING SCHEMATIC AUXILIARY ALARM RELAYS 5 AMP, 240 VAC USER DEFINABLE RS485 TO MONITORS RS485 TO HOST L N B A GND B A GND C NO NC C NO NC MAIN PWR GND SPECIAL NOTE: TO ESTABLISH THE RS485 COMMUNICATION LINK WITH THE RDM800 OR WITH A BUILDING MANAGEMENT SYSTEM, USE #18 GAGE AWG, MULTI-STRANDED, SHIELDED AND TWISTED PAIR, INSTRUMENT CABLE. INSURE THE DRAIN WIRE IS CONNECTED TO THE GND TERMINAL AT BOTH ENDS.
SECTION 5 Multiple HGM’S TERMINATOR “IN” RMD800 MULTIPLE HGM300’S WITH RDM800 NOTE – THE LAST HGM300 OR RDM800 ON EITHER END OF THE NETWORK MUST HAVE THE TERMINATOR IN THE “IN” POSITION AND ALL OTHER UNITS MUST HAVE THEIR TERMINATORS IN THE “OUT” POSITION. NOTE – TOTAL LENGTH OF RS-485 CABLE CANNOT EXCEED 1500m. (Use instrument cable 20 gage multistrand shielded and twisted pair – similar or equal to Beldon cable #8762.
Multiple HGM’s Connected to a Building Automation System – Daisy Chain Fashion BUILDING AUTOMATION SYSTEM RS-485 HGM300 UNIT 1 NODE 1 TERMINATOR “IN” HGM300 UNIT 2 NODE 2 HGM300 UNIT 3 NODE 3 HGM300 UNIT 4 NODE 4 TERMINATOR TERMINATOR TERMINATOR TERMINATOR “OUT” “OUT” “OUT” “IN” Node address may be set from ‘0” to “16” to allow building automation system to integrate the monitor system into its system. (Note: Units set for address “0” and address “1” will both respond to address “1” messages.
SECTION 6 Powering Up the Monitoring System (Warm up time is 15 minutes) Start up checkpoints: • All buttons on RDM800 “chirp” when pressed. (Contact the factory if they do not “chirp”) • DO NOT plug any unused zones.
SECTION 7 Programming the HGM300 Using the RDM800 1) From the System Screen on the RDM800, press the button adjacent to “ZONES”. System Screen Setup Screen #1 2) Press button adjacent to ZONE 1. NOTE: Press button adjacent to “LOCATION”. Then using the keypad left/right buttons to move across and the up/down buttons to enter alphanumeric data, enter a location for zone one (up to 12 characters). Press “ENTER” to lock in data and allow you to move to the next function.
Setup Screen #2 10) Press “LEAK LEVEL” button. Use left/right keys to move across and up/down keys to readjust leak alarm PPM level to desired PPM level. 11) Press “SPILL LEVEL” button. Repeat as in step 8. 12) Press “EVACUATE LEVEL” Button. Repeat as in step 8. NOTE: The evacuate level must be greater than or equal to the spill level, which must be greater than or equal to the leak level. 13) Press “RESET PEAK” button. Use the to clear the previous peak PPM displayed for this zone.
SECTION 8 Programming the HGM300 Using PC Software NOTE 1: There are two versions of software and firmware. Version 1.0 generally is found in HGM300 serial numbers beginning with AJ00 to serial numbers beginning with AF01 and version 1.40 from serial numbers beginning with AF01 forward. If an RDM800 is connected to the unit the version of the firmware can be obtained from the HGM300 Main screen. NOTE 2: The PC software uses COM1 by default.
USB Type Laptops Some of the newer laptops have USB ports and no RS-232 9-pin ports. You will be required to purchase a PCMCIA card that converts the laptop to RS-232. We recommend the PCMCIA card manufactured by: SEALEVEL SYSTEMS, INC. 155 TECHNOLOGY PLACE P. O. BOX 830 LIBERTY, SC 29657 PHONE – 864-843-4343 www.sealevel.com Part number: PC- SIO-232 PCMCIA CARD A straight-through RS-232 cable and a DB25-to-DB9 adapter will be required to connect to the HGM300.
SECTION 9 Responding To Alarms To respond to an alarm from the SYSTEM SCREEN, press the button adjacent to the blinking ALARM field. This will take you to the ALARM SUMMARY SCREEN. System Screen Alarm Summary Screen The ALARM SUMMARY SCREEN displays a list of all alarm conditions across the network. Each box represents a single alarm. If there are more then eight alarms additional screens can be displayed by pressing the MORE button. Each active alarm is indicated by a blinking box.
To acknowledge the alarm, press the button below ACK. You will be returned to the ALARM SUMMARY SCREEN and the box associated with that alarm will no longer be blinking, indicating that the alarm has been acknowledged. Repeat this procedure for each active alarm. When all alarms are acknowledged the red alarm light will go out on the HGM300 and the alarm relays will de-activate. All pending alarms across the entire network must be acknowledged before the RDM800 returns to normal operation.
SECTION 10 Log Interval and Trend Screen The HGM300 retains a data log of 100 measurements per zone, starting on the left and moving to the right. The log interval is the number of minutes from 0 to 1440 (1440 minutes is once every 24 hours) between each log point. This parameter can be changed from the ZONE SETUP SCREEN for each zone. (When 0 minutes are set, the trend is recorded every time the zone is sampled.
SECTION 11 Working with the Fault Screen From the SYSTEM SCREEN press the button adjacent to FAULT. This takes you to the FAULT SCREEN. The information displayed on this screen is broken onto two categories – CRITICAL FAULTS and NON CRITICAL FAULTS. Fault Screen Critical Faults • • • • • NO FLOW ON ZONE – Go to SYSTEM SCREEN, the to ZONES. The zone screen will display a “NO FLOW” message in each individual zone affected. Check for a blockage in the air sample line or at the line end filter.
• TRIGGER FAULT – No trigger from IR source pulser. Contact factory with all information from the DIAGNOSTIC SCREEN for farther instructions. Diagnostic Screen To get to the DIAGNOSTIC SCREEN – From the SYSTEM SCREEN press the button adjacent to the HGM300 that you wish to view, this takes you to the HGM SETUP SCREEN, from there press the button adjacent DIAG. Non Critical Faults • • • • • BOX TEMP FAULT – Internal – Enclosure temperature is outside normal range (or IR sensor has failed).
FAULT LOG SCREEN – From the FAULT SCREEN press the button under LOG. This screen lists the last 20 fault conditions recorded by the system. Using the left/right keys on the keypad you can move across the screen to view the time and date of the fault.
SECTION 12 Working with the Diagnostic Screen The Diagnostic Screen displays reference values for use by repair technicians. From the top level Zone Screen press the SYSTEM key to go to the System Screen. Press the Diagnostic key to view the reference values. Diagnostic Screen Overview The diagnostic screen contains sensor data and status information useful for trouble shooting various fault conditions. An explanation of each line is given below along with normal operating ranges.
LINE 7: PPM – Parts Per Million is the volume concentration referenced to standard temperature and pressure and is computed from lines 5, 8 and 13. There are 2 figures given. The first (annotated by a B) is the actual PPM at the IR branch. The second is a PPM reading normalized to standard temperature and pressure. LINE 8: Zero Temperature – This line contains the sensor and enclosure temperature measured and stored during the last purge cycle in degrees C.
SECTION 13 WHOM TO CALL AT THE FACTORY FOR REFRIGERANT GAS LEAK MONITOR ASSISTANCE PHONE NUMBER: 800-850-0044 FAX NUMBER: 678/423-2479 E-MAIL: Peter Pape: x2478, peterp@bacharach-inc.com Bacharach, Inc., help@bacharach-inc.com SHIPPING ADDRESS: BACHARACH, INC. C/O YOKOGAWA CORP. OF AMERICA 2 DART ROAD NEWNAN, GA 30265 WARRANTY HIGHLIGHTS ¾ PLEASE REVIEW COMPLETE WARRANTY CONDITIONS. ¾ PARTS: 2 YEARS AFTER SHIPMENT FROM FACTORY UNLESS OTHERWISE NEGOTIATED. ¾ LABOR: 90 DAYS AFTER SHIPMENT.