Contents hide
1 COPELAND P-N 851-4074 Multi Zone Leak Detector Application and Panel
2 Product Usage Instructions
3 Overview
4 Configuring Modbus Settings
5 Connecting Communication Wires
6 Documents / Resources
6.1 References
7 Related Posts

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COPELAND P-N 851-4074 Multi Zone Leak Detector Application and Panel

COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel-productCOPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel-product

Specifications

  • Product Name: MultiZone Leak Detector
  • Model Number: P/N 851-4074 or 851-4550
  • Application: Refrigerant leak detection system
  • Monitoring Areas: Up to six (6) separate spaces (zones)
  • Technology: Infrared-sensing technology
  • Communication Protocols: Modbus RTU, BACnet MS/TP
  • Alarm Features: Audible and visible alarms, circuit shutdown capability

Product Usage Instructions

Connecting the Leak Detector

  1. Connect the leak detector to the desired detection zone.
  2. Ensure proper wiring for analog signal communication with then main panel.

Configuring Modbus Settings

  1. Press and hold T4 and T5 keys for three (3) seconds.
  2. Select Controller Info from the Setup screen.
  3. Set the date, time, and Modbus address using arrow keys.
  4. Save changes after each selection by pressing SET.
  5. Perform a controller reboot after configuring all Modbus settings.

Frequently Asked Questions (FAQ)
Q: How many zones can be monitored with one panel?
A: Up to six (6) separate spaces (zones) can be monitored with one panel.

Overview

  • The Multi-Zone Leak Detector application and panel (P/N 851-4074 or 851-4550) is a refrigerant leak detection system for monitoring refrigerant leaks in walk-in boxes, rack houses and machine rooms.
  • Up to six (6) separate spaces (zones) can be monitored for refrigerant leaks with one panel. The system uses infrared-sensing technology to determine the concentration of refrigerant and reports this back to the main panel via analog signal wiring.
  • The Visograph display is the interface to the leak panel, displaying the Parts Per Million (PPM), and programming for the zones. One leak detector can be connected in each detection zone.
  • The Multi-Zone Leak Detector application is fully integrated with the E2E, has relay outputs for third-party devices, or can operate fully independent as a stand-alone device. The communication with E2E can use either Modbus RTU or BACnet MS/TP protocol.
  • Each zone is capable of operating an audible and visible alarm based on user-defined alarm and spill setpoints. In addition, each zone has the ability to trigger a circuit shutdown in the event of a spill.

Configuring Modbus Settings

COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (2)To set controller information from the Detector Status screen:

  1. Press and hold the T4 and T5 keys for three (3) seconds.
  2. The Setup screen will appear.
  3. Use the up and down arrow keys to highlight and select Controller Info and press SET.
  4. The Controller Info screen will appear.
  5. Use the up and down arrow keys to highlight and set the date, time, and Modbus address.
  6. Press SET after each selection to save changes.
  7. After all Modbus settings have been configured, a controller reboot must be performed. Use the down arrow key to select No next to Reboot Controller, press SET to edit and use the arrow keys to select Yes. Press SET again. The controller will reboot and boot back up with the new settings applied.

Configuring BACnet Settings
To configure the BACnet Settings from the Detector Status screen:

  1. Press and hold the T4 and T5 keys for three (3) seconds.
  2.  The Setup screen will appear.
  3. Scroll to 3. BACnet Settings and press SET to enter.
  4. MS/TP MAC: This parameter specifies the MS/TP network MAC address of the I/O Module. Each BACnet device on the bus must have a unique number here. Enter a unique number between 0-127 and press SET to save.
  5. Baud Rate: This parameter specifies how fast data is sent over the serial line. Set to match the baud rate of the serial port of the E2E controller.
  6. Max Master: This parameter defines value the highest allowable address for master nodes on the network. Determine the highest MS/TP MAC address used on the bus and set Max Master equal to this value. Example: If there are 40 controllers on the bus and the highest address is 40, set the max master of all 40 controllers to 40.
  7. Device ID: Enter the BACnet device identifier here. Enter a unique number for the MS/TP network in the range of 0-4, 194, 303.
  8. When at least one setting has been edited, a cancel option will appear above the T7 key and a save option above the T8 key. Pressing Cancel will revert the system back to the previous settings and no change will be applied.

Connecting Communication Wires

If the communication protocol between Leak Detector and E2E is using Modbus, connect the RS485 wiring to the RS485 slave terminal on the iPro controller, terminals 97, 98, 99. The polarity of the + and – wires is reversed between E2E serial port and the leak detector serial port.
Note: The polarity of the Modbus connection between E2E and the Multi-Zone Refrigerant Leak Detector is reversed.

BACnet MS/TP
The BACnet MS/TP connection should be wired in a daisy chain topology: no star or T configurations are allowed. Connect the BACnet network cable to the three terminal connectors on the E2E COM port you wish to assign as BACnet MS/TP. Connect the network cable to the leak detector on the RS485 master port terminals 94, 95, 96. Reverse the polarity of +/- on the RS485 cable between the E2E serial port and the leak detector serial port. Copeland specs General Cable 92454A
(Copeland P/N 135-0600) shielded twisted pair cables for use as BACnet MS/TP wiring.

COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (3)Configuring each Leak Detector  Zone
To configure the parameters, from the Detector Status screen:

  1. Press and hold T4 and T5 for three (3) seconds.
  2. The Setup screen will appear.
  3. Use the up and down arrow keys to highlight and select Config Param.
    COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (4)
  4. To configure each zone, select the corresponding Zone X Setup. This example will configure Zone 1 Setup, the steps are the same for Zones 1-6. Select Zone 1 and press SET.COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (5)

On the Zone 1 Setup screen, each parameter in the table below can be edited by using the T4/T6 keys to change values and the T5 SET key to save the selection.
Scrolling between pages within the zone setup is done by using T7/T8 Keys. To advance to next or previous zone setup menu, use T2 or T3 shortcut keys.
Configure each parameter in Zone 1 Parameters Page 1 table and see the instruction column of the table for the required action.

COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (7) COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (7)

Advance to the next page of setup parameters by pressing T8. COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (7)

COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (8)

COPELAND-P-N-851-4074-Multi-Zone-Leak-Detector-Application-and-Panel- (1)

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. Copeland reserves the right to modify the designs or specifications of such products at any time without notice. Responsibility for proper selection, use and maintenance of any product remains solely with the purchaser and end-user. ©2024 Copeland is a trademark of Copeland LP.
026-4418 R6

Documents / Resources

COPELAND P-N 851-4074 Multi Zone Leak Detector Application and Panel [pdf] User Guide
P-N 851-4074, P-N 851-4550, P-N 851-4074 Multi Zone Leak Detector Application and Panel, P-N 851-4074, Multi Zone Leak Detector Application and Panel, Detector Application and Panel, Application and Panel, Panel

References

Related Posts

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