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Summary of Contents for MSA Chillgard RT
- Page 1 Instruction Manual ® Chillgard Refrigerant Monitor Order No.: 814073/18 MSAsafety.com...
- Page 2 1000 Cranberry Woods Drive Schlüsselstrasse 12 Cranberry Township, PA 16066 8645 Rapperswil-Jona Switzerland For your local MSA contacts please go to our website www.MSAsafety.com © MSA 2016. All rights reserved...
- Page 3 MSA Permanent Instrument Warranty 1. Warranty- Seller warrants that this product will be free from mechanical defect or faulty workmanship for a period of eighteen (18) months from date of shipment or one (1) year from installation, whichever occurs first, provided it is maintained and used in accordance with Seller’s instructions and/or recommendations.
- Page 4 5. Do not paint the Chillgard RT System. Also, do not paint near any of the sample line inlets to ensure paint is not deposited on the sample inlet fitting of the units. Such paint deposits would interfere with the sampling process, whereby a sample of the atmosphere being monitored is drawn into the Chillgard RT System.
- Page 5 9. Properly vent the exhaust of the Chillgard RT System to a safe area. Improper venting of the exhaust may cause serious personal injury or death. 10. Ensure the gas sample to the system is clean and non-condensing. Install end-of-line filters in all sample inlet lines.
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Page 6: Table Of Contents
The Internal Multipoint Sequencer Unit: ....... 1-7 Terminology ..............1-8 Applications ..............1-9 Sensor Selectivity* ............1-9 Table 1-2. Typical Chillgard RT System for R-11 Cross-Sensitivity Response Data ... 1-9 Table 1-3. Typical Chillgard RT System for R-12 Cross-Sensitivity Response Data ..1-10 Table 1-4. - Page 7 R-500 Cross-Sensitivity Response Data ..1-12 Table 1-10. Typical Chillgard RT System for R-502 Cross-Sensitivity Response Data ..1-13 Table 1-11. Typical Chillgard RT System for Ammonia* Cross-Sensitivity Response Data ....1-13 Table 1-12. Typical Chillgard RT System for R-404a Cross-Sensitivity Response Data ..1-14 Chapter 2 Installation and Set-up ........
- Page 8 Wiring the Chillgard RT Unit ........2-11 Analog Signal Output Wiring (FIGURE 2-5) ....2-11 4-20 mA ..............2-11 0-10 VDC ..............2-11 RS 232 Output ............2-12 Figure 2-5. Wiring Connections ......2-12 Ferrite Bead Installation ..........2-13 Figure 2-6. Ferrite Bead Installation ....... 2-13 CAUTION ............
- Page 9 Figure 4-1. Kit Components ........4-2 Table 4-1. RP Calibration Gases......4-3 Chillgard RT identification ..........4-3 CAUTION ............4-3 Figure 4-2. Chillgard RT Models ....... 4-4 Calibration Procedures ............ 4-5 Table 4-2. Calibration Sequence Screens ....4-5 Figure 4-3a. Zero Calibration ........4-6 Figure 4-3b.
- Page 10 Table B-1. Specifications…………………………….B-3 Figure B-3. Relay Module Main Power Connector and Communication Cable Connector Locations………………………………………...B-3 Communication Cable Connections…………………B-4 Figure B-4. Chillgard RT Relay Module Power Wiring Diagrams for 120 Volts and 240 Volts ………………………………………..B-4 Figure B-5. Chillgard RT Refrigerant Monitor………B-4 viii...
- Page 11 Communication Cable Connections ......B-7 WARNING ..............B-7 CAUTION ..............B-7 WARNING ..............B-7 Communication Cable Connections to the Chillgard RT Relay Module ........B-8 Communication Cable Connections to the Chillgard RT Refrigerant Monitor ......B-8 Relay Wiring ..............B-8 Operation ................B-9 Front Panel ..............
- Page 12 Multi-refrigerant Capability* ......D-1 Introduction ..............D-1 Specifications ..............D-1 Table D-1*. Multi-Refrigerant Chillgard RT Refrigerant Monitor ...... D-1 Table D-2. Typical Cross Sensitivity at 100 Parts Per Million (PPM) at 25°C for the Chillgard RT Refrigerant Monitor Calibrated at 1000 PPM R11 as Expressed in Response Factors ....
- Page 13 Installation ............... D-2 Figure D-1. Label and RS-232 Location ....D-3 Figure D-2. Calibration Label ........D-4 Figure D-3. Manufacture Date Label ......D-4 Initial Setup ............... D-5 Calibration ............... D-5 Display Screens .............. D-5 WARNING ............. D-5 Figure D-4. Gas by Point Setup Screens ....D-7 Figure D-5.
- Page 14 Chillgard RT Refrigerant Monitor...
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Page 15: General Information
These instruments can provide continuous refrigerant gas monitoring (see TABLE 1-1 for Operating Specifications). All units listed below have been evaluated by Underwriters Laboratory. The ammonia units have not been evaluated by Underwriters Laboratories, Inc. CHILLGARD RT MONITORS EVALUATED BY UNDERWRITERS LABORATORIES, INC. R-11 R-502 R-12 R-123... -
Page 16: Table 1-1. Chillgard Rt System General Operating Specifications
Table 1-1. Chillgard RT System General Operating Specifications PERFORMANCE SPECIFICATIONS STABILITY 0-50 ppm, +1 ppm; ammonia is 2 ppm 51-1000 ppm, +10% of reading SHORT TERM NOISE +1 ppm peak over a 10-minute period; ammonia* is +2 ppm LINEARITY 0-50 ppm +1 ppm; ammonia* is +2 ppm... -
Page 17: Identifying Your Unit
**For UL2075 testing from 50°C to 61°C, the Temperature Effect is +0.6%/°C of reading and +1 ppm/°C For the Chillgard RT Remote Relay* unit option, see Appendix B, "Relay Module." The Chillgard RT Monitor is intended for indoor use in mechanical equipment rooms housing air conditioning or refrigeration equipment or for use in areas where bulk refrigerants are stored. -
Page 18: Figure 1-1. Identifying Your Unit
Figure 1-1. Identifying your Unit... -
Page 19: Figure 1-2. Single Point Sequencer Unit
Figure 1-2. Single Point Sequencer Unit Figure 1-3. Four Point Sequencer Unit Figure 1-4. Eight Point Sequencer Unit... -
Page 20: Beacon
If the end of sample line filters are not included, they must be purchased. Place an end-of-sample line filter (P/N 711561). Figure 1-5. Chillgard RT Monitor with Optional Beacon General Description The Chillgard RT Unit: •... -
Page 21: The Internal Multipoint Sequencer Unit
• RS 232 output (see Appendix C for more information). The Internal Multipoint Sequencer Unit: • Allows a single Chillgard RT unit to monitor up to four or eight areas or locations, if equipped • Each point is capable of sampling from remote areas up to 500 feet (152 m) from the Chillgard RT unit •... -
Page 22: Terminology
PUMP- The electric motor driven device that moves the gas sample to the Chillgard RT Monitor. ALARMS- The Chillgard RT System has three alarms to alert the user at specific, user-adjustable refrigerant gas concentrations. (Level 1 = Caution, Level 2 = Warning and Level 3 = Alarm.) RELATIVE HUMIDITY- The percent of water vapor saturation in air at a given temperature. -
Page 23: Applications
Applications The Chillgard RT Monitor is factory-calibrated for a particular refrigerant gas. When calibrated, the Chillgard RT System is used in a wide variety of industrial applications, such as: • detection of refrigerant gases leaking into the atmosphere • ambient air monitoring for health and safety purposes... -
Page 24: Cross-Sensitivity Response Data
Table 1-3. Typical Chillgard RT System for R-11 Cross-Sensitivity Response Data CONCENTRATION (PPM) EQUIVALENT PPM R-12 Acetone Methyl Ethyl Ketone 1000 Methanol 1000 Methylene Chloride 1000 Trichloroethylene 1000 Ethyl Acetate 1000 Xylene (ortho-Xylene) 1000 R113 R134A R114 TEST CONDITIONS: Calibrated 0-1000 PPM R-12 in N 2; Temperature - 25°C Table 1-4. -
Page 25: Cross-Sensitivity Response Data
Table 1-5. Typical Chillgard RT System for R-123 Cross-Sensitivity Response Data CONCENTRATION (PPM) EQUIVALENT PPM R-123 Acetone Methyl Ethyl Ketone Methanol iso-Propanol Methylene Chloride 1000 Trichloroethylene 1000 Ethyl Acetate Xylene (ortho-Xylene) 1000 Ammonia Natural Gas 1000 R113 <1 R134A R123 TEST CONDITIONS: Calibrated 0-1000 PPM R-123 in N 2 ;... -
Page 26: Cross-Sensitivity Response Data
Table 1-7. Typical Chillgard RT System for R-113 Cross-Sensitivity Response Data CONCENTRATION (PPM) EQUIVALENT PPM R-113 R123 R134A R114 R113 TEST CONDITIONS: Calibrated 0-1000 PPM R-113 in N 2 ; Temperature: 25°C Table 1-8. Typical Chillgard RT System for R-113 Cross-Sensitivity Response Data... -
Page 27: Cross-Sensitivity Response Data
Table 1-10. Typical Chillgard RT System for R-502 Cross-Sensitivity Response Data CONCENTRATION (PPM) EQUIVALENT PPM R-502 R123 R134a R502 TEST CONDITIONS: Calibrated 0-1000 PPM R-502 in N 2 ; Temperature: 25°C Table 1-11. Typical Chillgard RT System for Ammonia* Cross-Sensitivity Response Data... -
Page 28: R404A Cross-Sensitivity Response Data
Table 1-12. Typical Chillgard RT System for R404a Cross-Sensitivity Response Data CONCENTRATION (PPM) EQUIVALENT PPM R-404a <1 R113 R123 R134a TEST CONDITIONS: Calibrated 0-1000 PPM R-404a in N 2 ; Temperature: 25°C 1-14... -
Page 29: Installation And Set-Up
Retain the original packing form for re-use in the event the unit must be returned for service. 3. Using a screwdriver, loosen the two latches on the Chillgard RT door (FIGURE 2-1) by turning 1/4 turn counterclockwise. 4. Open the front door. -
Page 30: Location Of The Monitor
Figure 2-1. Front Door Latches Location of the Monitor WARNING This unit must not be located in areas that may contain a flammable mixture of gas and air; otherwise, an explosion may occur. The monitor performance is dependent on its location and sensing pick- up location(s). -
Page 31: Guidelines For Locating The Sampling Point(S)
4. Do not mount unit where it will be exposed to direct solar heating. 5. For proper cooling, allow at least three inches (7.6 cm) clearance around all surfaces except for the mounting surface. 6. Mount the unit so the front panel is easily seen and accessed for service and calibration. -
Page 32: Figure 2-2. Typical Monitor Installation
Figure 2-2. Typical Monitor Installation (Monitors without sequencer option have one sampling port; those with sequencer have four or eight ports) -
Page 33: Activity In The Room
Activity in the Room The expected activities in the room must also be considered when determining the sensing point. Refrigerants will concentrate near the floor. Typically, sampling 12-18 inches (30.5-45.7 cm) above the floor is sufficient for early warning and to provide adequate protection for someone working close to the floor. -
Page 34: Mounting The Unit
8. DO NOT: • back-pressure the exhaust line or • connect it to a vacuum source or • install a flow meter in the exhaust line. ALWAYS : connect an exhaust line that is vented to a safe area or an outside atmosphere. -
Page 35: Wiring Connections
Wiring Connections Opening the Unit All wiring to the Chillgard RT unit is made via the side entries. Open the unit to provide complete access to all wiring connections. Ensure that all wiring codes are followed. These codes include, but are not limited to, the National Electrical Code. -
Page 36: Figure 2-3A. Mounting Dimensions
Figure 2-3a. Mounting Dimensions... -
Page 37: Figure 2-3B. Mounting Dimensions
Figure 2-3b. Mounting Dimensions... -
Page 38: Unit Power Wiring
1. Using a screwdriver, loosen the two latches on the enclosure door (FIGURE 2-1). 2. Open the front door. 3. Determine the power requirements for your Chillgard RT unit, ensuring the power is clean and reliable. (Refer to TABLE 1-1 for current capacity specifications.) -
Page 39: Wiring The Chillgard Rt Unit
L1 and L2 and ground wire to terminal. Analog Signal Output Wiring (FIGURE 2-5) The Chillgard RT unit has two available analog outputs. Each analog output is software-selectable between 10% or 100% of full scale: • 4-20 mA, isolated, current sourcing •... -
Page 40: Rs 232 Output
The voltage output can be programmed to correspond to the channel presently being sampled. The front-panel screen shows: 1V/PT IF OUT = 1-10V (indicating one volt per point if output equals one to 8 volts). When enabled, and the unit is monitoring from: •... -
Page 41: Ferrite Bead Installation
Ferrite Bead Installation Some models are shipped with ferrite beads. Follow the instructions below for proper installation. • The input and output signals must be connected by using twisted, shielded wire pairs. • The shield or its drain wire (FIGURE 2-6) must be connected to the grounding terminal on the power supply plate. -
Page 42: Optional Alarm Beacon
Optional Alarm Beacon Your unit may have an optional alarm kit installed. This kit is made up of a beacon on the top of the unit. It is factory-wired so no additional wiring is necessary; it lights when any alarm indication is given by the instrument. -
Page 43: Trouble Relay
Trouble Relay There is one relay (the Trouble relay) within the unit that indicates that a trouble or start-up condition exists. This relay is configured from the factory and operates differently than the alarm relays. It operates in a normally-energized mode. This relay is energized when the instrument is: •... -
Page 44: Audible Alarm Output
AWG. Shielded wire is necessary. Ground the shields of all cables at the transmitting end of the signal. Do not ground or connect the shield at the Chillgard RT Refrigerant Monitor. CAUTION All field wiring must be done in accordance with national and local electrical codes. -
Page 45: Multipoint Sequencer Operation
• the monitor returns to the previous sequencer setup (FIGURE 3-4). Chillgard RT operation with a sequencer has a normal dwell time of 30 seconds per sample line, or four measurement cycles. To improve monitor performance in noisy environments and eliminate false alarms due to high noise, a user-selectable parameter "threshold"... -
Page 46: Start-Up And Initial Adjustments
Chapter 3 Start-up and Initial Adjustments Before applying power to the Chillgard RT Refrigerant Monitor, follow the Appendix A check list. This will help ensure that the instrument is properly configured for operation. All instrument operation is performed via the front panel which consists of four keys and a two-line by 20-character vacuum fluorescent display. -
Page 47: Figure 3-1A. Display Screen Overview
Figure 3-1a. Display Screen Overview... -
Page 48: Figure 3-1B. Display Screen Overview Continued
Figure 3-1b. Display Screen Overview Continued... -
Page 49: Normal Operation Screens
Figure 3-2a. Start-up and Normal Operation Screens... -
Page 50: Normal Operation Screens Continued
Figure 3-2b. Start-up and Normal Operation Screens Continued... -
Page 51: Figure 3-3A. Setup Screens
Figure 3-3a. Setup Screens... -
Page 52: Figure 3-3B. Setup Screens Continued
Figure 3-3b. Setup Screens Continued... -
Page 53: Figure 3-4. Span Calibration
Figure 3-4. Span Calibration... -
Page 54: Figure 3-5. Zero Calibration
Figure 3-5. Zero Calibration... -
Page 55: Figure 3-6. Check Calibration
Figure 3-6. Check Calibration 3-10... -
Page 56: Figure 3-7. Diagnostic Screens
Figure 3-7. Diagnostic Screens 3-11... -
Page 57: Figure 3-8. Diagnostic Screens
Figure 3-8. Diagnostic Screens 3-12... -
Page 58: Figure 3-9. Diagnostic Screens
Figure 3-9. Diagnostic Screens 3-13... -
Page 59: Figure 3-10. Data Screens
Figure 3-10. Data Screens 3-14... -
Page 60: Figure 3-11. Sequencer Set-Up Screen
Figure 3-11. Sequencer Set-up Screen 3-15... -
Page 61: Figure 3-12. Sequencer Set-Up Screen
Figure 3-12. Sequencer Set-up Screen 3-16... -
Page 62: Figure 3-13. Alarm Level Screen
Figure 3-13. Alarm Level Screen 3-17... -
Page 63: Figure 3-14. Alarm Latching Screen
Figure 3-14. Alarm Latching Screen 3-18... -
Page 64: Figure 3-15. Alarm Latching Screen
Figure 3-15. Alarm Latching Screen 3-19... -
Page 65: Figure 3-16. Audio Alarm Screen
Figure 3-16. Audio Alarm Screen 3-20... -
Page 66: Figure 3-17. Analog Output Screen
Figure 3-17. Analog Output Screen 3-21... -
Page 67: Figure 3-18. Aux Alarm Screen
Figure 3-18. Aux Alarm Screen 3-22... -
Page 68: Figure 3-19. Auxiliary Alarm Screen
Figure 3-19. Auxiliary Alarm Screen 3-23... -
Page 69: Figure 3-20. Setup Time
Figure 3-20. Setup Time 3-24... -
Page 70: Figure 3-21. Setup Log
Figure 3-21. Setup Log 3-25... -
Page 71: Figure 3-22. Setup Password
Figure 3-22. Setup Password 3-26... -
Page 72: Figure 3-23. Review Log
Figure 3-23. Review Log 3-27... -
Page 73: Figure 3-24. Review Data
Figure 3-24. Review Data 3-28... -
Page 74: Chapter 4 Calibration
Perform the calibration procedure regularly and maintain a log of calibration adjustments. Calibration frequency may increase for a variety of reasons. If calibration cannot be performed at any step, STOP; consult MSA at 1-800-MSA-INST. -
Page 75: Calibration Equipment
Calibration Equipment Equipment needed: • Calibration Kit (MSA ATO #50; FIGURE 4-1) • A SPAN gas cylinder • Optional ZERO gas cylinder. • A ZERO gas cylinder may not be needed. • For ammonia units, zero gas cylinder must be used. -
Page 76: Table 4-1. Rp Calibration Gases
The Calibration Kit contains a ZERO gas scrubber which can be used in place of a ZERO gas cylinder if the ambient air around the Chillgard RT contains little or no refrigerant. CAUTION The zero gas scrubber must be replaced periodically. The frequency of replacement depends on the concentration of the ambient refrigerant vapors. -
Page 77: Figure 4-2. Chillgard Rt Models
Figure 4-2. Chillgard RT Models... -
Page 78: Calibration Procedures
Calibration Procedures Before calibrating the Chillgard Monitor, leak-check the sample line(s) connected to the monitor: 1. Temporarily block the sample inlet at the end-of-line filter(s) and verify that the monitor gives a trouble alarm. • If the monitor is a Multipoint Sequencer, the trouble alarm will not activate until the blocked sampling point is selected by the Sequencer. -
Page 79: Figure 4-3A. Zero Calibration
• If adjustments are needed, press ADJ to access the UP, DOWN and ENTER keys; enter the zeroing and spanning adjustments. 4. Zeroing the Monitor: When zero gas is required, attach a zero gas scrubber or zero gas cylinder to the connector as shown in FIGURE 4-3. NOTE: Use only the zero gas cylinder on monitors calibrated for ammonia. -
Page 80: Figure 4-3B. Zero Calibration Continued
NOTE: The span gas must be appropriate for monitor calibration. For many applications, a span gas cylinder of the refrigerant of interest is available from MSA. If a span gas cylinder of the specific refrigerant is not available, MSA has determined an appropriate synthetic span gas. -
Page 81: Figure 4-4. Span Calibration
Figure 4-4. SPAN Calibration Figure 4-5. Ammonia or R-404a Unit Calibration... -
Page 82: Warning
6. Perform the TABLE 4-2 sequence. a. Apply zero gas when requested. • Allow enough time for a stable reading. b. Accept (OK) or adjust ("ADJ") and enter a zero reading. c. Apply span gas when requested. • Allow enough time for a stable reading. d. -
Page 83: Maintenance
Chapter 5 Maintenance General Maintenance Under normal operation conditions the Chillgard RT Monitor requires minimal maintenance. The end-of-sample-line filter(s) should be examined regularly for dirt/dust build-up and replaced when necessary. If the filter(s) become severely clogged with dust, the flow rate will eventually fail and a flow alarm will occur. -
Page 84: Table 5-1. Replacement Parts
Table 5-1. Replacement Parts PART PART Internal Filter, Single Point 711561 Internal Filters, all Multipoint and single-point Ammonia 655533 Filter, End-of-Line 711561 Ammonia Unit, Filter, End-of-Line 655652 2.0 amp, 250 volt Fuse 638091 Display 655786 Front Panel Printed Circuit Board Assembly (grey ribbon cable) 10014705 Power Supply 637394... -
Page 85: Table 5-2. Troubleshooting Guidelines
2. Check span gas supply. 3. Check all tubing, filters and fittings for leaks. 4. For sequencer units, make sure unit is locked on the selected sample port used for calibration. 5. Leak test the flow system. 6. Return to MSA for service. - Page 86 OFF and re-start unit. sample flow line at 2. Leak test the flow system. unit startup Case temperature Main board 1. Return to MSA for service. failed component Case temperature Case 1. Return to MSA for service. range failed temperature is 0 to 90 °C...
- Page 87 1. Replacement requires MSA service. range failed temperature range of 45 to 90 °C Humidity sensor failed Checks H 2 O 1. Return to MSA for service. sensor output Infrared source failed Checks the I 1. Return to MSA for service of source...
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Page 88: Chapter 6 Data Logging
Chapter 6 Data Logging Log Size The Chillgard RT unit allows 1,078 sets of data and events to be logged. This data is either the maximum or average of the "last" data calculated. Last Values The maximum value is taken from the ’last’ data; this is not always the highest value displayed, but the last valid data taken from a point. - Page 89 Appendix A Check List Before applying power to the Chillgard RT Refrigerant Monitor, check for all items in the following table: ITEM CHECK FOR: CHECKED OR INITIALED Proper mounting of Chillgard RT Refrigerant Monitor on a non-vibrating surface which does not block the front panel.
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Page 92: Appendix B Relay Module
This accessory module has not be evaluated by Underwriters Laboratory, Inc. General Description The Chillgard RT Relay Module is intended to provide discrete relay outputs for the Chillgard RT Refrigerant Monitor equipped with a multi- point sequencer. The Chillgard RT Refrigerant Monitor has three alarm threshold levels (CAUTION, WARNING, and ALARM), each with a corresponding form C relay output. -
Page 93: Figure B-2. Mounting The Relay Module
Monitor and sets its installed relays according to information received. While the Chillgard RT Relay Module receives its information from the Chillgard RT Refrigerant Monitor, it is important to note that the Relay Module operates independently with respect to the Reset Switch and Audio operation. -
Page 94: Specifications
Specifications Table B-1. Specifications TEMPERATURE OPERATING 0 to 50°C RANGE STORAGE -20 to 60°C POWER 85 - 264 Volts @ 40 Watts max. MAXIMUM 30 seconds WARM-UP TIME HUMIDITY 0 to 99% RH non-condensing SYSTEM COMMUNICATION RS-485 RELAYS 10 Amps @ 125, 250 VAC COMMON TROUBLE 10 Amps @ 30 VDC AND HORN RELAY... - Page 95 Figure B-4. Chillgard RT Relay Module Power Wiring Diagrams for 120 Volts and 240 Volts AC Figure B-5. Chillgard RT Refrigerant Monitor Communication Cable Connections...
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Page 96: Figure B-6. Typical Interface Modules
Figure B-6. Typical Interface Modules... -
Page 97: Unpacking The Shipping Carton
Identifying the Unit Each bank of relays (see FIGURE B-3) is assigned to a particular alarm level. Chillgard RT Relay Modules can be purchased with one, two, or three internal relay banks (TABLE B-2). Table B-2. Part Numbers and Supplied Relays... -
Page 98: Communication Cable Connections
Identify the main power voltage that will power the Chillgard RT Relay Module; if unsure of your primary power, consult an electrician or local power utility. WARNING Application of improper power to the Chillgard RT Relay Module will result in damage to the unit. -
Page 99: Communication Cable Connections To The Chillgard Rt Relay Module
Relay Wiring Before installing any wiring to the relays within the Chillgard RT Relay Module, refer to the manual for the specific equipment being connected to the relays for wiring procedures and requirements. If your unit is a four-point Chillgard RT model, use the first four relays. -
Page 100: Operation
Section 4, Troubleshooting Guidelines. Trouble Indicator The Trouble Indicator turns ON and remains ON when a trouble condition is detected. The trouble condition may exist at the controlling Chillgard RT Refrigerant Monitor or it may exist locally at the Chillgard RT Relay Module. -
Page 101: Ready Indicator
• This indicator remains OFF during the initial Chillgard RT Refrigerant Monitor warm-up, setup and calibration. Chillgard RT Relay Module Relays There are three types of relays in the Chillgard RT Relay Module: • common horn relay • common trouble relay •... -
Page 102: The Discrete Caution, Warning And Alarm Relays
Note that during the Warm-Up state of the Chillgard RT Refrigerant Monitor, all alarm relays in the Relay Module are cleared. Alarm Relay Configuration Latching The configuration of all alarm relays is controlled by the Chillgard RT Refrigerant Monitor. • If the Chillgard RT alarm relay (CAUTION, WARNING, ALARM) is configured as latching, all eight relays of the corresponding bank in the Relay Module are configured for latching operation. -
Page 103: Operation
Trouble Relay While a trouble condition in the Chillgard RT Refrigerant Monitor activates the trouble relay in the Chillgard RT Relay Module, a trouble condition in the Relay Module does not activate the trouble relay in the controlling Chillgard RT Refrigerant Monitor. -
Page 104: Horn Operation
Horn Operation Configuration The configuration of the horn relay is controlled by the Chillgard RT Refrigerant Monitor. • The Horn Relay in the Relay Module is configured by the “Caution sets Audio Alarm,” “Warning sets Audio Alarm,” “Alarm sets Audio Alarm”... -
Page 105: Troubleshooting
Loss of communication Check wiring between Chillgard RT flashes Refrigerant Monitor and Relay Module Check power wiring or power supply Check wiring in the Chillgard RT Relay Module Power LED Power fault Check wiring, power supply and fuse not ON... -
Page 106: Appendix C Rs-232 Output
232 Output Introduction Your Chillgard RT Gas Monitor is ordered and built for the particular types of gas in use. The monitor full scale range may differ from the standard 0 to 1000 ppm range. Check the calibration label on the reverse side of the front cover (FIGURE C-1) to determine your instrument’s full scale range. -
Page 107: Three Types Of Messages Can Be Transmitted From The Rs-232 Port:
The instrument is ready to monitor; however, it is necessary to configure the unit to your specific requirements. Your Chillgard RT Gas Monitor may contain an internal Multi-Point Sequencer, enabling your unit to sample from up to eight individual sampling locations. Your unit also contains several other features described in this appendix: •... -
Page 108: Data Logged Value
Data Logged Value The data logged value is the next message. • The first line indicates the date and time. • The second line shows the: • point • gas type and • logged concentration. • The message is generated for every point and sent every 15 minutes or hourly, depending on the setup selection. -
Page 109: Status
Table C-2. Status Message... -
Page 110: Table C-3. Data Logging
Table C-3. Data Logging... -
Page 111: Rs-232 Output
Table C-4. Alarm Logging RS-232 Output The RS-232 output broadcasts certain information about the Chillgard RT Gas Monitor (TABLE C-3). This output conforms to the specification for RS-232 signal levels and is capable of driving its signal up to 200 feet (61 m) when using low capacitance RS-232 cable. See FIGURE C-1 for RS-232 connector location. -
Page 112: Figure C-2. Typical Rs-232 Wiring
Figure C-2. Typical RS-232 Wiring When connecting RS-232 cable to the instrument: • The strain relief cover or shell on the 25-pin sub "D" connector must be removed. It is not possible to use a pre-wired or molded cable because its shell or strain relief is not removable. The connector’s shell or strain relief does not fit within the instrument. -
Page 113: Remote Gas Sampling Channel Identification
Remote Gas Sampling Channel Identification Chillgard RT Monitors have two analog outputs: • 4-20 mA and • 0-10 Volts. The voltage output can be programmed to correspond to the channel presently being sampled. The front panel screen indicates: 1V/PT IF OUT = 1-10V (1 volt per point if output equals one to 10 volts). -
Page 114: Appendix D Multi-Refrigerant Capability*
TABLE D-1. Introduction The Chillgard RT Refrigerant Monitor is available with the capability to detect up to six different refrigerant gases. This capability is used when multiple chillers using different refrigerants are located together or in separate machinery rooms. -
Page 115: Calibrated At 1000 Ppm R11 As Expressed In Response Factors
After your unit is installed, open the front door and locate the Calibration Label (FIGURES D-1 and D-2). Also see the Manufacturing Date Label (FIGURES D-1 and D-3). If the Chillgard RT Refrigerant Monitor is built with multiple refrigerant gas capability, the calibration label shows what gases the unit can detect. -
Page 116: Figure D-1. Label And Rs-232 Location
Figure D-1. Label and RS-232 Location... -
Page 117: Figure D-2. Calibration Label
Figure D-2. Calibration Label Figure D-3. Manufacture Date Label... -
Page 118: Initial Setup
The only variation of the calibration procedure for the multi-gas Chillgard RT Refrigerant Monitor is to apply span gas to only one of the sample points. The particular sampling point chosen must be configured to monitor that particular gas. - Page 119 The screen in this section allows the user to define the refrigerant gas that is expected at each sampling point. Also, they determine which refrigerant gas is used for calibration by selecting the sampling point configured for that particular gas. Following are sample screens that differ from the Section 3, "Display Screens":...
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Page 120: Figure D-4. Gas By Point Setup Screens
Figure D-4. Gas by Point Setup Screens... -
Page 121: Figure D-5. Alarm Level Screens
Figure D-5. Alarm Level Screens... -
Page 122: Figure D-6A. Alarm Level Screens
Figure D-6a. Alarm Level Screens... -
Page 123: Figure D-6B. Alarm Level Screens
Figure D-6b. Alarm Level Screens D-10... - Page 124 For local MSA contacts, please visit us at MSAsafety.com Because every life has a purpose...
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