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Summary of Contents for Bacharach MVR-300
- Page 1 MVR-300™ Refrigerant Gas Detector for Occupied Spaces User Manual Installation ● Operation ● Configuration ● Troubleshooting P/N: 6203-9000 August 2016 Version 1 Product Leadership • Training • Service • Reliability 1.800.561.8187 information@itm.com www. .com...
- Page 2 All software utilized and/or distributed by Bacharach is subject to copyright protection. All rights are reserved. No party may use or copy such software in any manner or format, except to the extent that Bacharach grants them a license to do so. If this software is being loaded onto more than one computer, extra software licenses must be purchased.
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Page 3: Table Of Contents
MVR-300™ Refrigerant Gas Detector TABLE OF CONTENTS SECTION 1. SAFETY ..........................5 Definition of Alert Icons ......................5 General Safety Statements ....................... 5 Safe Connection of Electrical Devices ..................6 SECTION 2. DESCRIPTION ........................7 Product Overview ........................7 Intended Use ..........................7 Design Features ........................ - Page 4 Output Status Flags ....................40 SECTION 9. ORDERING INFORMATION ..................42 MVR-300 Refrigerant Leak Detector Configurations ............... 42 MVR-300 Refrigerant Leak Detector Configurations (UK Version) ......... 42 Accessories ..........................43 SECTION 10. CUSTOM UK BACK BOXES AND FACEPLATES ............44 10.1 Introduction to UK Version .......................
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Page 5: Safety
Only trained and competent personnel may use this product. • Only trained and competent personnel may inspect, repair and maintain the product as detailed in this manual. Maintenance that is not detailed in this manual must be completed by Bacharach or personnel qualified by Bacharach. •... -
Page 6: Safe Connection Of Electrical Devices
MVR-300™ Refrigerant Gas Detector Safe Connection of Electrical Devices Before connecting this detector to electrical devices not mentioned in this manual, consult the manufacturer or a qualified professional. The sensor must be connected by a marked, suitably located and easily reached switch or circuit-breaker as means of disconnection. -
Page 7: Description
The detector is for indoor applications. It is housed in an ABS enclosure that fits into most 2-gang electrical back boxes (not included). The MVR-300 is designed for use in 2-gang back boxes with a minimum depth of 47 mm (1.9”). Metal United Kingdom (UK) back boxes are also supported, but require a special UK version of the MVR-300, slightly modified installation, and a customized faceplate (not supplied by Bacharach). -
Page 8: Components Overview
MVR-300™ Refrigerant Gas Detector Components Overview Figure 2. MVR-300 Components (Front) P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com www. .com... - Page 9 MVR-300™ Refrigerant Gas Detector Figure 3. MVR-300 Components (Back) Item Description of MVR-300 Components in Figure 2 and Figure 3 Coin slot to release bezel Magnetic switch positions 1 (● on top) and 2 (●● on bottom) Multi-color status LED...
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Page 10: Installation
The access pathway of the refrigerant gas to the sensor must not be obstructed • The detector should be installed about 4 to 6 inches (100 to 150 mm) above the floor level Figure 4. A Sampling of 2-Gang Electrical Boxes Supported by the MVR-300 P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com... - Page 11 MVR-300™ Refrigerant Gas Detector Figure 5. Typical MVR-300 Installation in an Occupied Space Application Figure 6. Recommended Installation Locations P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com www. .com...
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Page 12: Configuration
For a proper reset, switch 1 must be toggled (ON then OFF). If it is left ON, the detector is held in reset mode and will not function correctly until the switch is returned to the OFF position. NOTICE Figure 7. Switches for Configuring the MVR-300 P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com www. - Page 13 MVR-300™ Refrigerant Gas Detector Switch Function Options and Descriptions Positions Off = Normal Operation (default) Restart On = Restart MVR-300 (must return switch to OFF position) Off, Off = No delay (default) Off, On = 5 minute delay Alarm ON 2, 3 Delay...
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Page 14: Electrical Installation
MVR-300™ Refrigerant Gas Detector Electrical Installation A switch or circuit breaker must be included in the installation. The switch or circuit breaker must be suitably located and easily reached, and it must be marked as the disconnect device for the equipment. - Page 15 MVR-300™ Refrigerant Gas Detector Step Description of Electrical Installation Observing proper polarity, connect normally closed (NC) common (COM), and normally open (NO) wires for relays to the appropriate terminals. Figure 9. Wiring Relay 1 (Low Gas Alarm) and Relay 2 (High Gas Alarm or Fault) Observing proper polarity, make the Modbus connections as follows, using the figures below for reference.
- Page 16 Place detector into electrical back box (not included) and secure through the appropriate mounting slots. Figure 12. Secure the MVR-300 and Wiring into the Back Box Put cover plate back into hinge and tighten the set screw. Figure 13. Replace and Secure Cover Plate Put the bezel back into hinge and snap on.
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Page 17: Operation
Relay state is “no alarm” Alarm Management Function and Configuration The MVR-300 offers several different ways how the detector behaves in case of a refrigerant alarm. The alarm manager can either be configured through the switches or the Modbus interface. -
Page 18: Alarm Delay - Switches 2 And 3
MVR-300™ Refrigerant Gas Detector Figure 15. Default Alarm Generation 4.2.2 Alarm Delay – Switches 2 and 3 To avoid premature alarms, ensuring the presence of refrigerant for a certain amount of time, the triggering of the alarm can be delayed for a short period of time. Unless the alarm condition is present for at least the delay time, the alarm will not be triggered. - Page 19 MVR-300™ Refrigerant Gas Detector Figure 17. Alarm ON Delay (A Shorter Delay Time Is Disregarded) Figure 18. Alarm ON Delay for Multiple Alarm Levels P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com www. .com...
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Page 20: Failsafe - Switch 4
MVR-300™ Refrigerant Gas Detector 4.2.3 Failsafe – Switch 4 If ON, the relays will change state whenever either of the following occurs. • Power loss • Alarm condition. 4.2.4 Alarm 2 Relay – Switch 5 If ON, the relay will only change state as a result of an alarm condition. -
Page 21: Other Switch Configurations
MVR-300™ Refrigerant Gas Detector Other Switch Configurations 4.3.1 Reset (Cycle Power) - Switch 1 Use the following procedure to cycle power to the MVR-300. Step Description Move switch 1 to the ON position. Move switch 1 to the OFF position. -
Page 22: Operation Of Magnetic Switches, Buzzer, And Led
Operation of Magnetic Switches, Buzzer, and LED Figure 20. Operation of Magnetic Switches, Buzzer, and LED If the drill pattern of the customized (metal) faceplate for the UK version of the MVR-300 does not accommodate the two magnetic switch locations, the faceplate must be removed to use the magnetic wand functions (e.g., zero adjustment, span adjustment,... -
Page 23: Maintenance
Performing these operations out of order will cause faulty calibration. WARNING Bacharach recommends calibrating detectors within the application-specific condition and with target gas. This method of zeroing the detector in the application environment and performing a target gas calibration is more accurate. A surrogate gas calibration may only be performed as an alternative if a target gas calibration is not possible. -
Page 24: General Procedure
MVR-300™ Refrigerant Gas Detector 5.2.2 General Procedure Step Description Verify that the detector is NOT in alarm and does not have a fault condition (i.e., it must not have a continuous orange LED). Verify that the calibration gas is in a balance of air, not Nitrogen (N Attach the pressure regulator to the calibration gas cylinder. -
Page 25: Zero Adjustment
MVR-300™ Refrigerant Gas Detector 5.2.3 Zero Adjustment Ambient air can be used to zero the sensor instead of synthetic air only if the area is known to be free of the target gas or any gas to which the sensor may be cross- sensitive. -
Page 26: Bump Test
MVR-300™ Refrigerant Gas Detector 5.2.5 Bump Test A bump test is a live test of a system to verify that the detector responds to gas and all connected alarm devices, BMS, etc. are operating accordingly. In this case it is necessary that all involved persons are informed about the test and certain alarms might have to be inhibited (e.g., shutdown valves, notification... -
Page 27: Hexadecimal Format
MVR-300™ Refrigerant Gas Detector Step Description The voltage reading is an indicator of the sensitivity of the sensor. If the voltage reading is significantly lower than the expected value, the sensor module must be replaced. The LED will blink green-orange-red indicating “offline”. -
Page 28: Fault Conditions
MVR-300™ Refrigerant Gas Detector 5.3.3 Fault Conditions Required Fault Pri- Mask Fault Description Clearing Action Actions During State ority (HEX) Fault All bits No fault cleared Firmware error (e.g., Fatal Acknowledge (reset Wait for switch 2 0x0001 Software fault unexpected switch... -
Page 29: Fatal Faults
MVR-300™ Refrigerant Gas Detector 5.3.4 Fatal Faults • Orange LED is on • Relay 2 indicates fault, if configured • Buzzer is on • Modbus flag is set to fault • Gas reading is invalid Fatal faults can only be recovered by rebooting the system. To reboot the system do the following. -
Page 30: Replacing The Sensor Module
MVR-300™ Refrigerant Gas Detector Replacing the Sensor Module This product uses semiconductors which can be damaged by electrostatic discharge (ESD). When handling the PCB, care must be taken so that the electronics is not damaged. CAUTION Step Description Power-down detector. -
Page 31: Cleaning The Detector
MVR-300™ Refrigerant Gas Detector Item Description Replaceable sensor module Sensor alignment ribs (x3) Sensor extractor tool (color may vary) Recesses (x2) for extracting sensor Alignment notches (x3) on sensor module Figure 23. Sensor Replacement Showing Sensor Extractor Tool Cleaning the Detector Clean the detector with a soft cloth using water and a mild detergent. -
Page 32: Sensor Principle
MVR-300™ Refrigerant Gas Detector SECTION 6. SENSOR PRINCIPLE Semiconductor or metallic oxide sensors (MOSs) are among the most versatile of all broad-range sensors. They are heated to a temperature between 150º and 300º C depending on the gas(es) to be detected. -
Page 33: Disposing Of The Detector
However, this device has not been registered for household usage. Therefore it must not be disposed of through these channels. The device can be returned to your national Bacharach Sales Organization for disposal. P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com... -
Page 34: Technical Data
MVR-300™ Refrigerant Gas Detector SECTION 8. TECHNICAL DATA Approvals Specification Description EN 50270:2015 Electromagnetic compatibility. Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen Approval pending UL/CSA/IEC/EN 61010-1 Approval Pending Specifications for Modbus RTU Digital Communication over RS-485... -
Page 35: Physical Specifications
MVR-300™ Refrigerant Gas Detector Physical Specifications Specification Description Enclosure Material Enclosure Protection IP40, NEMA 1 Size L x W x D 6” x 4.1” x 1.75” (150 x 105 x 45 mm) including bezel (Approximate) Depth of bezel 0.39” (10 mm) -
Page 36: Modbus Registers
MVR-300™ Refrigerant Gas Detector Modbus Registers If items span two registers (e.g., 1005 and 1006), then the registers are “long” or “float” data types. Otherwise the registers are integer data types or ASCII. NOTICE 8.9.1 Read Device Identification The following Object IDs are used with function code 43/14 to read ASCII device identification objects. - Page 37 MVR-300™ Refrigerant Gas Detector Name Description Data Type Def Val Addr Low alarm threshold as Unsigned 1019 Gas Low Alarm % FS (0-100) percentage of full scale Integer High alarm threshold as Unsigned 1020 Gas High Alarm % FS (0-100)
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Page 38: Analog Output Registers
MVR-300™ Refrigerant Gas Detector 8.9.3 Analog Output Registers Analog output registers are readable (using function code 03) and writable (using function code 06). Before writing to any “locked” registers, be sure to use the Parameter Unlock register (2000) first to unlock the registers and (if desired) to re-lock those registers afterwards. -
Page 39: Input Status Flags
MVR-300™ Refrigerant Gas Detector Data Name Description Def Val Addr Type 0 = Relay 2 indicates high alarm only R. W if Relay 2 Fault 1 = Relay 2 indicates high alarm Unsigned 2010 Indication and fault condition integer locked... -
Page 40: Output Status Flags
MVR-300™ Refrigerant Gas Detector 8.9.5 Output Status Flags Output status flags are readable (using function code 01) and writable (using function code 05). Before writing to any “locked” registers, be sure to use the Parameter Unlock register (2000) first to unlock the registers and (if desired) to re-lock those registers afterwards. - Page 41 MVR-300™ Refrigerant Gas Detector Data Name Description Addr Type Setting this flag places the detector into manual override mode to allow for testing of outputs. During manual override mode the relays, analog output and LEDs will not R. W if...
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Page 42: Ordering Information
0 to 10000 ppm 6203-0041 0 to 2500 ppm 6203-0042 0 to 5000 ppm R-32 6203-0043 0 to 10000 ppm MVR-300 Refrigerant Leak Detector Configurations (UK Version) Detection Range Refrigerant 6203-1001 0 to 2500 ppm 6203-1002 0 to 5000 ppm R-410a... -
Page 43: Accessories
Tubing for Calibrating Kit, Reactive Gases (1000-3718) 1100-2022 Extractor Tool (for removing sensor module during replacement process) 1100-2043 MVR-300 Standard Version, Replacement Plastics Kit, includes: • Top Cover, Plastic (1100-2008) • Bottom Cover, Plastic (1100-2009) • Bezel, Plastic (1100-2010) •... -
Page 44: Custom Uk Back Boxes And Faceplates
In applications requiring the thinner metal tabs, the standard plastic tabs must first be removed. If the tabs of your back box are too high, the MVR-300 may protrude too far from wall. In this case, you will need to remove the plastic tabs from MVR-300 base plate and replace them with thinner metal tabs (provided) to permit proper flush mounting. -
Page 45: 10.3 Using Optional Metal Tabs
10.4 Electrical Installation – UK Version Wiring installation of the UK version of the MVR-300 includes earth grounding of the custom metal cover plate to the metal back box, and the box to earth ground. Refer to local codes, laws, guidelines, and best practices for wiring instructions. -
Page 46: 10.5 Customizing Face Plates
Figure 28. Typical Grounding Lugs on Custom Metal Cover Plate and UK Back Box 10.5 Customizing Face Plates The UK version of the MVR-300 requires a customized faceplate (not supplied by Bacharach) that provides proper access holes for airflow to the sensor module and visual access to the LED indicator at a minimum. -
Page 47: 10.6 Calibration
Tubing Calibration Adapter (UK version) Though calibration of the standard MVR-300 can be done from the faceplate or the base plate (with the bezel and faceplate removed), calibration of the UK version is designed to be done using the rubber calibration adapter with the custom faceplate removed. - Page 48 Figure 32. Standard (Top) vs. UK Version (Bottom) Calibration Adapters with Tubing Aside from the calibration adapter itself (and the fitting of the adapter to the MVR-300), the actual zero and span calibration process is the same for both the standard and UK versions of the MVR-300.
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Page 49: Declaration Of Conformity
MVR-300™ Refrigerant Gas Detector SECTION 11. DECLARATION OF CONFORMITY The technical documentation file required by this directive is maintained at the headquarters of Murco, a Bacharach Company P/N: 6203-9000 Version 1 1.800.561.8187 information@itm.com www. .com...
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