Emerson MRLDS-450 Quick Start Manual

Refrigerant gas detector for machinery rooms, cold rooms and freezers
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Refrigerant Gas Detector (MRLDS-450)
for Machinery Rooms, Cold Rooms and Freezers
Quick Start Guide
The MRLDS-450 refrigerant gas detector is designed for use in refrigeration
applications and may be used as a stand-alone device, or connected to a facility's
building management system (BMS). It enables compliance with refrigerant
safety codes (ASHRAE 15 and EN378) and features audible and visual alarms to
alert personnel in the event of a refrigerant leak.
1. Safety Instructions
DANGER: The MRLDS-450 is NOT certified or approved for operation in
oxygen-enriched atmospheres. Failure to comply may result in severe injury or
death.
WARNING: Use this product ONLY for the purposes and under the conditions
listed in the user manual. Failure to comply may result in injury and/or damage
to the product. The MRLDS-450 has not been designed to be intrinsically safe
for use in areas classified as being hazardous locations. For your safety, DO NOT use in
hazardous locations. Consult a qualified professional before connecting the MRLDS-450 to devices not mentioned in
this manual. Failure to comply may result in injury and/or damage to the product.
WARNING: The gas diffusion path can become occluded (moisture, dust, debris, frozen condensation) over time, resulting in
reduced or complete lack of gas detection and alarming function. Routine visual inspection of the gas detector and bump
testing are recommended to ensure proper gas detection and alarm function. For information on calibrating the sensor, refer to
the Care and Maintenance section of the MRLDS-450 User Manual P/N 026-1316.
CAUTION: Except for the maintenance detailed in this manual, this product should ONLY be opened and/or
serviced by authorized personnel. Failure to comply may void the warranty.
CODE COMPLIANCE: Comply with all local and national laws, rules and regulations associated with this equipment. Operators
should be aware of the regulations and standards in their industry/locality for the operation of the MRLDS-450.
TECHNICIAN USE ONLY: The MRLDS-450 must be installed by a suitably qualified technician who will install this unit in
accordance with these instructions and the standards in their particular industry/locality. This document is only intended as a
guide and the manufacturer bears no responsibility for the installation or operation of this unit. Failure to install and operate the
unit in accordance with these instructions and with industry guidelines may cause serious injury or death and the manufacturer
will not be held responsible in this regard.
Document Part # 026-4417 Rev 1
©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use.
Visit our website at http://www.emerson.com for the latest technical documentation and updates.
Figure 1 - Refrigerant Gas Detector
Page 1 of 9

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  Summary of Contents for Emerson MRLDS-450

  • Page 1 MRLDS-450. TECHNICIAN USE ONLY: The MRLDS-450 must be installed by a suitably qualified technician who will install this unit in accordance with these instructions and the standards in their particular industry/locality. This document is only intended as a guide and the manufacturer bears no responsibility for the installation or operation of this unit.
  • Page 2: Component Overview

    Table 1 - Component Descriptions Document Part # 026-4417 Rev 1 Page 2 of 9 ©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use. Visit our website at http://www.emerson.com for the latest technical documentation and updates.
  • Page 3: Product Specifications

    STEP 1: Mount Gas Detector & Remove Lid CAUTION: DO NOT allow the lid/sensor to hang from the ribbon cable. Failure to comply may result in damage to the product. 1. Mount the MRLDS-450 according to the product dimensions, maximum wiring lengths, and following considerations: •...
  • Page 4 IMPORTANT: If analog output is 4 to 20mA, connect or short the connection to ensure the gas detector does not go into fault. IMPORTANT: The MRLDS-450 has a jumper on the analog output. This jumper MUST be removed to use the analog 4-20mA output signal.
  • Page 5 • Fasten terminal screws. Document Part # 026-4417 Rev 1 Page 5 of 9 ©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use. Visit our website at http://www.emerson.com for the latest technical documentation and updates.
  • Page 6 Figure 7 - Site Supervisor Setup Document Part # 026-4417 Rev 1 Page 6 of 9 ©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use. Visit our website at http://www.emerson.com for the latest technical documentation and updates.
  • Page 7 Figure 8 - E2 Setup Document Part # 026-4417 Rev 1 Page 7 of 9 ©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use. Visit our website at http://www.emerson.com for the latest technical documentation and updates.
  • Page 8: Operation Overview

    6. Connect MRLDS-450 to MRLDS-400 Series App (User Discretion) The MRLDS-450 uses a smartphone application to allow users to interface with the gas detector. IMPORTANT: Default alias, passkey, and unlock code can be changed via the MRLDS-400 Series App’s configuration menu.
  • Page 9: Part Number And Ordering Information

    The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Emerson Retail Solutions, Inc. and/or its affiliates (collectively “Emerson”), reserves the right to modify the designs or specifications of such products at any time without notice. Emerson does not assume...