Instruction/ maintenance manual of the product MRLDS Emerson
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026-1307 Rev 1 11-30-07 Modular Refrigerant Leak Detection Sensor (MRLDS) Inst allation and Operation Manual.
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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 ha s been carefully chec ked and is believed to be accurate. However, Com puter Process Controls, Inc.
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MRLDS I&O Manual Table of Contents • v Table Of Contents 1 OVERVIEW ............ .............. .............. .............. .............. .............. ............... .............. ........... .............. .............. ............. 1 1.
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Specifications Overvi ew • 1 1 Overview CPC specs a modular refrigerant leak detection sensor (MRLDS) that continuously monitors for low levels of refrigerants most commonl y us ed in commercial refrigera- tion systems.
2 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 2 Choosing a Mounting Location Proper location of the refriger ant sensor is necessary to ensure accurate measurement of representative air sam- ples. Mount the sensor: • Indoors, inside a room area where air circulates freely .
MRLDS Dimensions MRLDS Analog Version (809-100x) • 3 2.2 MRLDS Dimensions 3 MRLDS Analog V ersion (809-100x) 3.1 Network Layout 3.2 MRLDS W iring For analog MRLDS units, connect to a MultiFlex board via the analog input (use Belden 87 61 cable).
4 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 3.3 R efrigerant Jumper Settings The jumper set tings for refr igerant 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.
Network Layout MRLDS Mo dbus Version (809-101x) • 5 3.4.3 RMCC Controllers For RMCC-type controllers, set the Gain parame ter to 250 and Offset to -10 00 . 4M R L D S M o d b u s V ersion (809-101x) 4.1 Network Layout 4.2 MRLDS Setup 4.2.1 MRLDS W iring 4.
6 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 4.2.3 Address Settings 4.2.4 Refrigerant Jumper Settings The jumper set tings for refr igerant 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.
MRLDS Gateway MRLDS Modbus Version (809-101x) • 7 bits with no parity and 2 (two) stop b its. 4.3 MRLDS Gateway 4.3.1 MRLDS Gateway Setup on I/O Network Modbus versions of the MRLDS must be connected to the 810-3040 MRLDS Gateway .
8 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 The Gateway Board commun icates with the MRLDS via the Modbus network, which is connected to the Gate- way’ s “Receiver Bus” network terminal. The Gateway communicates with the E2 via the RS485 I/O Network.
MRLDS Gateway MRLDS Modbus Version (809-101x) • 9 controller ’ s user manual. T o connect the Gateway to an MRLDS, feed the wires through the rectangular opening in the sen s or base as in di- 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 .
10 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 4.3.9 Setting the Baud Rate Dip Switches Dip switches 6 and 7 control the baud rate at which th e Gateway communicates w ith the site co ntroller on the RS485 Network.
Controller Setup for Modbus MRLDS MRLDS Modbus Version (809-101x) • 11 4.3.10.4 Setup/Online Screen 2 - The Setup/Online screen displays the addressing of the devices and whether they are enabled. Press the right/ left arrows to select the first address in the list.
12 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 ways. Navigate to the controller ’ s Input Status screen and highlight the board and point that yo u wish to map. Press F1 to go to the Input Setup screen for that board/ point. Each point will increase incr ementally to co rrespond with each board.
Controller Setup for Modbus MRLDS MRLDS Modbus Version (809-101x) • 13 field to change the name, and press the down or right arrow to move to the (sensor) Type field. Use the “.” and “ — ” keys to scroll through the options and select IRLDS .
14 • MRLDS I&O Manual 026-1307 Rev 1 11-30-07 “MV” should be entered for sensor inputs that read fault status. Gain and Offset Since the output terminals emit one volt fo r every 250 ppm of refrigerant detect ed, the gain for the refrigeran t leak sensors must be set to 250 and the O ffset to 0.
An important point after buying a device Emerson MRLDS (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Emerson MRLDS yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson MRLDS - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson MRLDS you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson MRLDS will certainly help you make a decision on the purchase.
If you already are a holder of Emerson MRLDS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson MRLDS.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson MRLDS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson MRLDS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
