Bacharach MZ-RD User manual

MZ-RD
Remote Display
Instruction 3015-5157
Installation / Operation / Maintenance
Rev. 6 – December 2011
UL 61010-1
CAN/CSA 22.2 No.61010.1
Product Leadership • Training • Service • Reliability

MZ-RD – Multi-Zone Remote Display
ii Instruction 3015-5157
NOTICE
Product improvements and enhancements are continuous; therefore the specifications and information contained in
this document may change without notice.
Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this material.
No part of this document may be photocopied, reproduced, or translated to another language without the prior written
consent of Bacharach, Inc.
Copyright © 2000–2011, Bacharach, Inc., All Rights Reserved
BACHARACH®is a registered trademark of Bacharach, Inc. All other trademarks, trade names,
service marks and logos referenced herein belong to their respective owners.
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.'s reasonable satisfaction
to have been defective; provided that written notice of the defect shall have been given by Buyer to Bacharach Inc.
within two (2) years after the date of delivery of this Product by Bacharach, Inc.
Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach's liability and Buyer's
remedy under this warranty of title are limited to the removal of any title defects or, at the election of Bacharach, to
the replacement of this Product or parts thereof that are defective in title.
The warranty set forth in Paragraph 1 does not apply to parts the Operating Instructions designate as having a limited
shelf-life or as being expended in normal use (e.g., filters).
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I) ANY AND
ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE: AND (II) ANY OBLIGA-
TION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT ARISING FROM
BACHARACH'S NEGLIGENCE, ACTUAL OR IMPLIED. The remedies of the Buyer shall be limited to those provided
herein to the exclusion of any and all other remedies including, without limitation incidental or consequential
damages. No agreement varying or extending the foregoing warranties, remedies or this limitation will be binding
upon Bacharach, Inc. unless in writing, signed by a duly authorized officer of Bacharach.
Register your warranty by visiting
www.mybacharach.com

MZ-RD – Multi-Zone Remote Display
Instruction 3015-5157 iii
Table of Contents
Chapter 1. Introduction ............................................................................................................. 1
1.1. How to Use This Manual .................................................................................................................. 1
1.2. 1
Warnings and Caution Labels .................................................................................................................... 1
Hazard Symbols on the Monitor ....................................................... Error! Bookmark not defined.
1.3. Safety Precautions ........................................................................................................................... 1
Altitude Limit .................................................................................... Error! Bookmark not defined.
1.4. 2
Communications Options .......................................................................................................................... 2
Chapter 2.......................................................................................................................................... 3
Installation ....................................................................................................................................... 3
2.1. Warnings and Cautions.................................................................................................................... 3
2.2. Preliminary Inspection ..................................................................................................................... 3
2.3. Location of the Remote Display....................................................................................................... 3
2.4. Mounting Instructions ..................................................................................................................... 4
2.5. Interior Components........................................................................................................................ 6
2.6. Electrical Wiring ............................................................................................................................... 7
2.7. Communications Connections ......................................................................................................... 8
2.7.1 MZ-RD Network .................................................................................................................. 8
2.7.2 Integration with Building Management System ................................................................. 8
2.8. 9
Connecting External Alarms....................................................................................................................... 9
2.8.1 Overview............................................................................................................................. 9
2.8.2 Connection.......................................................................................................................... 9
Chapter 3. Overview ................................................................................................................ 10
3.1. General........................................................................................................................................... 10
3.2. System Programming..................................................................................................................... 11
3.2.1. Setup Parameters ............................................................................................................. 11
3.2.2. Password Protection......................................................................................................... 11
3.3. Setup Programming ....................................................................................................................... 12
3.3.1. Setting the Clock ............................................................................................................... 12
3.3.2. Navigating to the 1st MZ-RD Setup Screen........................................................................ 12
3.3.3. Num Monitors on Net....................................................................................................... 13
3.3.4. Monitor Baud.................................................................................................................... 13
3.3.5. Audible Alarm ................................................................................................................... 13
3.3.6. BMS................................................................................................................................... 14
3.3.7. BMS Baud Rate ................................................................................................................. 14
3.3.8. Password........................................................................................................................... 14

MZ-RD – Multi-Zone Remote Display
iv Instruction 3015-5157
3.3.9. Navigating to the 2nd MZ-RD Setup Screen....................................................................... 14
3.3.10. Setting Relay Parameters.................................................................................................. 14
3.3.11. Node Address.................................................................................................................... 14
3.3.12. Navigating to the 1st and then 2nd Monitor Setup Screen.............................................. 15
3.3.13. Navigating to the 3rd Monitor Setup Screen ..................................................................... 16
3.4. Zone Setup Programming .............................................................................................................. 17
3.4.1. Navigating to the 1st Zone Setup Screen............................................................................. 17
3.4.2. Navigating to the 2nd Zone Setup Screen ............................................................................ 18
3.4.3. Navigating to the Trend Screen .......................................................................................... 18
Chapter 4. General Operation .................................................................................................. 20
4.1. Functional Overview ...................................................................................................................... 20
4.2. The Zone Screen............................................................................................................................. 20
4.3. 21
Alarm Conditions ..................................................................................................................................... 21
4.4. Fault Conditions ............................................................................................................................. 21
4.5. The System Screen......................................................................................................................... 22
4.5.1. Alarm Conditions................................................................................................................. 22
4.5.2. 23
Alarm Log ....................................................................................................................................... 23
4.5.3. Fault Conditions .................................................................................................................. 24
4.6. Alarms ............................................................................................................................................ 25
4.6.1. Functional Overview ........................................................................................................... 25
4.6.2. Responding to Alarms ......................................................................................................... 25
4.6.3. Alarm Detail Screen............................................................................................................. 26
4.6.4. Acknowledging Alarms........................................................................................................ 26
4.7. The Trend Screen ........................................................................................................................... 27
4.7.1. Overview - Log Interval ....................................................................................................... 27
4.7.2. Navigating to the Trend Screen .......................................................................................... 27
4.8. System Faults ................................................................................................................................. 28
4.8.1. Functional Overview ........................................................................................................... 28
4.8.2. Navigating to the Fault Screen............................................................................................ 29
4.8.3. Critical Faults....................................................................................................................... 29
4.8.4. Non Critical Faults ............................................................................................................... 30
4.8.5. Reset to Factory Default Settings........................................................................................ 30
4.8.6. Clearing System Faults ........................................................................................................ 31
4.8.7. Viewing Fault Log ................................................................................................................ 31
4.9. The Calibration Screen................................................................................................................... 32
4.9.1. Overview ............................................................................................................................. 32
4.9.2. Navigating to the Calibration Screen .................................................................................. 32
4.9.3. Adjusting Calibration Factor................................................................................................ 33
4.10. The Diagnostic Screen.................................................................................................................... 33

MZ-RD – Multi-Zone Remote Display
Instruction 3015-5157 v
4.10.1. Overview ........................................................................................................................... 33
4.10.2. Navigating to the Diagnostic Screen ................................................................................. 33
4.10.3. Diagnostic Screen Overview.............................................................................................. 34
4.11. 35
Service Mode ........................................................................................................................................... 35
Appendix A. Logic Diagram ............................................................................................................. 38
Appendix B. Specifications ............................................................................................................. 40
Appendix C. Agency Approvals ....................................................................................................... 42
Appendix D. Service Centers........................................................................................................... 44

MZ-RD – Multi-Zone Remote Display
vi Instruction 3015-5157

MZ-RD – Multi-Zone Remote Display
Instruction 3015-5157 1
CHAPTER 1. INTRODUCTION
1.1. How to Use This Manual
Thank you for investing in a Bacharach MZ-RD Remote Display. To assure operator safety and the proper
use of the MZ-RD please read, understand, and follow 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 refrigerant monitors, you will find this manual useful as a reference
tool. If you are new to the use of refrigerant monitors, you can educate yourself about the principles of
refrigerant gas detection and the proper operation of this device by reading this manual thoroughly. This
manual provides important information on how to install, operate, and service the Remote Display.
1.2. Warnings and Caution Labels
When used in this manual or as labeled on the MZ-RD, the following hazard symbols and/or associated
words are defined as follows.
WARNING: This symbol and/or the use of the word WARNING indicates a potential
hazard associated with the use of this equipment. It calls attention to a procedure,
practice, condition, or the like, which if not correctly performed or adhered to, could
result in death or serious injury.
WARNING: This symbol and/or the use of the word WARNING indicates a potential
hazard from electrical shock. It calls attention to a procedure, practice, condition, or the
like, which if not correctly performed or adhered to, could result in death or serious
injury.
CAUTION: This symbol and/or the use of the word CAUTION indicates a potential hazard
associated with the use of this equipment. It calls attention to a procedure, practice,
condition, or the like, which if not correctly performed or adhered to, could result in
minor or moderate injury.
IMPORTANT: The use of the word IMPORTANT in this manual calls attention to a
procedure, practice, condition, or the like, which if not correctly performed or adhered to,
could result in incorrect performance of or damage to the equipment and may void the
warranty.
1.3. Safety Precautions

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2 Instruction 3015-5157
WARNING: This instrument has not been designed to be intrinsically safe for use in areas
classified as hazardous locations. For your safety, DO NOT use it in hazardous (classified)
locations.
WARNING: Under no circumstances should the MZ-RD be operated without connection
to a protective ground. Doing so poses a potential shock hazard and is also a violation of
electrical safety standards applicable to this type of equipment.
WARNING: Do not operate this equipment in the presence of flammable liquids, vapors
or aerosols. Operation of any electrical instrument in such an environment constitutes a
safety hazard.
WARNING: Extreme care should be exercised when accessing the interior of the remote
display. Only qualified electrical maintenance personnel should perform connections and
adjustments. Always remove AC power before working inside the remote display’s
enclosure.
IMPORTANT: The protection provided by the remote display may be impaired if the
remote display is used in a manner not specified by Bacharach, Inc. Modifications to this
remote display, not expressly approved, will void the warranty.
IMPORTANT: In case of malfunction, do not continue to use this equipment if there are
any symptoms of malfunction or failure. In the case of such occurrence, de-energize the
power supply and contact a qualified repair technician or the nearest Bacharach Service
Center. Use ONLY the provided knockouts for electrical and communication wiring.
Drilling into the box will void the warranty.
WARNING: To clean the outside of the case use a DRY CLOTH. DO NOT use soap and
water.
IMPORTANT: This device is designed for operation at or below an altitude of 6,562 ft
(2,000 m). Do not operate this device above this altitude limit.
1.4. Communications Options
The MZ-RD features full two-way communications via an RS-485 interface. MODBUS RTU is the
communication protocol standard. The instrument (P/N 3015-5138) can be connected to a Building
Management System or it may be operated as a stand-alone system with Bacharach’s gas monitors.
Please refer to the Appendix for a more complete discussion of communication protocols.

MZ-RD – Multi-Zone Remote Display
Instruction 3015-5157 3
CHAPTER 2. INSTALLATION
2.1. Warnings and Cautions
WARNING: Explosion hazard! Do not mount the MZ-RD 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: Electrical installation should be performed by a certified electrician, and
should comply with all applicable NEC/CEC and local electrical safety codes.
WARNING: The AC power ground wire must first be connected to the monitor’s ground
stud. Under no circumstances should this monitor be operated without a protective
ground. Doing so poses a potential shock hazard, and is also a violation of electrical safety
standards applicable to this type of equipment.
WARNING: Shock hazard! Always disconnect AC power before working inside the
monitor.
CAUTION: Drilling holes in the MZ-RD enclosure may damage the unit and will void the
warranty. Please use provided knockouts for electrical connections.
CAUTION: The MZ-RD contains sensitive electronic components that can be easily
damaged. Be careful not to touch or disturb any of these components.
2.2. Preliminary Inspection
The MZ-RD has been thoroughly inspected and tested prior to shipment from the factory. Nevertheless,
it is recommended that the instrument be re-checked prior to installation. Inspect the outside of the
enclosure to make sure there are no obvious signs of shipping damage. Loosen the four screws on the
sides of the enclosure and remove the front panel. Visually inspect the interior of the display for loose
components that may have become dislodged during shipment. If damage is discovered, please contact
the nearest Bacharach Service Center for assistance.
2.3. Location of the Remote Display

MZ-RD – Multi-Zone Remote Display
4 Instruction 3015-5157
The MZ-RD should be centrally located in the facility (preferably outside of the mechanical room) and
should be easily accessible for visual monitoring and servicing. This is the “split architecture design” for
safety of the operator.
Dirt, grease, and oils can adversely affect the operation of the MZ-RD. The MZ-RD should be installed
out of direct sunlight in a clean, dry area that is not subject to temperature or humidity extremes.
Installation in a mechanical room is acceptable provided reasonable environmental conditions exist. If
there is a question, consider installing the unit outside of the mechanical room in a cleaner area of the
facility.
The MZ-RD can be located up to 4500 feet (1372 m) from the furthest gas monitor. The MZ-RD is the
main machine interface by which you can program the gas monitor, acknowledge alarms, and observe
conditions inside the mechanical room. Note that there are two additional alarm relay contacts in the
MZ-RD that can be programmed to alarm with “leak, spill, evacuate, fault or monitor on”.
2.4. Mounting Instructions
The MZ-RD should be installed plumb and level and securely fastened to a rigid mounting surface.
The enclosure utilizes
keyhole mounting
brackets designed for
¼ inch fasteners.
Locate the four
screws as shown in
the diagram below or
by using the provided
mounting template.
Allow the screw
heads to protrude
approximately 1/4"
(6 mm).
Hold the unit flat
against the mounting
surface and allow it
to slide down
engaging the screw
heads in the keyhole
slots of the mounting
brackets. Adjust the
screws as necessary
to hold the unit
MZ-RD Mounting Specs