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Emerson MRLDS Operation Manual

Modular refrigerant leak detection sensor (mrlds)
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026-1307 Rev 1 11-30-07
Modular Refrigerant Leak Detection
Sensor (MRLDS) Installation and
Operation Manual

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Summary of Contents for Emerson MRLDS

  • Page 1 026-1307 Rev 1 11-30-07 Modular Refrigerant Leak Detection Sensor (MRLDS) Installation and Operation Manual...
  • Page 3 Computer Process Controls, Inc. 1640 Airport Road Suite #104 Kennesaw, GA 31044 Phone 770-425-2724 Fax 770-425-9319 ALL RIGHTS RESERVED The information contained in this manual has been carefully checked and is believed to be accurate. However, Computer Process Controls, Inc. assumes no responsibility for any inaccuracies that may be contained herein.

  • Page 5: Table Of Contents

    OWERING 2 CHOOSING A MOUNTING LOCATION ... 2 2.1 M ... 2 OUNTING ENSOR 2.2 MRLDS D ... 3 IMENSIONS 3 MRLDS ANALOG VERSION (809-100X)... 3 3.1 N ... 3 ETWORK AYOUT 3.2 MRLDS W ... 3 IRING 3.3 R...

  • Page 7: Overview

    24VAC, 10VA Class 2 transformer is sufficient for up to three (3) MRLDS units. CPC supplies several sizes of transformers for power- ing multiple MRLDS units (three or more). Note that polarity must be maintained when connecting more than one MRLDS to a single transformer.

  • Page 8: Choosing A Mounting Location

    (Figure 1-1). Connect the wires to the terminal connector located in the base, as indicated in Figure 4-2 and Figure 3-2. The Modbus MRLDS must be connected to earth ground. Connect earth ground to the MRLDS ground terminal labeled 0°C ground with 14 AWG wire that is less than 6 inches.

  • Page 9: Mrlds Dimensions

    MultiFlex Board MRLDS Units Figure 3-1 - Analog MRLDS Network Layout Example MRLDS Wiring For analog MRLDS units, connect to a MultiFlex board via the analog input (use Belden 8761 cable). Analog MRLDS MULTIFLEX BOARD - to MultiFlex LOWER RIGHT CORNER...

  • Page 10: Refrigerant Jumper Settings

    Refrigerant Jumper Settings The jumper settings for refrigerant types are located on the label inside the MRLDS sensor cover (shown in Fig- ure 1-1). Set the jumpers according to how they are indi- cated on the label. The MRLDS supports three different refrigerant types.

  • Page 11: Mrlds Modbus Version (809-101X)

    J3. Refer to Table 4-1 (also included on the inside label of the MRLDS) for network addressing with corre- sponding jumper settings. If more than one MRLDS is on the network, each unit must have a unique address and be numbered according to the inside label (Table 4-1) specifications.
  • Page 12 4.2.4 Refrigerant Jumper Settings The jumper settings for refrigerant types are located on the label inside the MRLDS sensor cover (shown in Fig- ure 1-1). Set the jumpers according to how they are indi- cated on the label. The MRLDS supports three different refrigerant types.

  • Page 13: Mrlds Gateway

    4.3.2 Gateway Connections Cal/Setup 2 (Lsb) Up to 12 MRLDS units may be connected to the Gate- Factory way board (P/N 810-3040). The Gateway board can inter- Mode face with a site controller as a 16AI or as an IRLDS. If the...
  • Page 14 Board to the Einstein or REFLECS Network Each E2, Einstein, or REFLECS site controller that Six-Board will communicate with one or more MRLDS units must have a Gateway Board installed on its RS485 I/O Net- 640-0080 work. For Einstein controllers, this means the Gateway 80 VA will be installed on the RS485 I/O Network;...
  • Page 15 Figure 4-9 - Connecting the Gateway to the E2 RS485 Network To connect the Gateway to an MRLDS, feed the wires through the rectangular opening in the sensor base as indi- cated in Figure 1-1. Locate the RS485 connector and secure the wire leads to the connector orienting them as shown in Figure 4-10.
  • Page 16 RMCC, or E2), and defaults to 9600 baud. Dip switch 8 controls the baud rate at which the Gateway communicates with the MRLDS. For 9600 baud, set dip switch 8 to the OFF position. For 19200 baud, set dip switch 8 to the ON position (always use 19200 baud for MRLDS).

  • Page 17: Controller Setup For Modbus Mrlds

    (Back) button and select 1. Online Status (Alt + N) to check the status. For mapping the MRLDS unit as a 16AI board, first set dip switch #5 on the Gateway board to the ON position. Follow Steps 1-6 above, but for Step 6 select the num-...
  • Page 18 F1 to go to the Input Setup screen for that board/point. Each point will increase incrementally to correspond with each board. (For example, where the MRLDS is address 1 and the MRLDS address is 100, use board 1, point 1. For an MRLDS address of 101, use point 2.) 4.4.3...
  • Page 19 Logging Interval (HH:MM:SS): =PREV =NEXT ->=SET-DATA Controller Setup for Modbus MRLDS Locate the screen in the BEC or RMCC where sensors are set up. This is usually a menu option in the Sensors Menu, which may be reached from the Main Menu.

  • Page 20: Diagnostics

    If any one or all of the MRLDS sensors encounters a problem, the IRLDS application will alarm and all cell outputs will show NONE. For details on which individual unit is in alarm, go to the MRLDS Gateway and check the Status screen on the HHT. 5.2.2...

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