Installation and Maintenance Manual IM 736-4 Group: Controls Part Number: IM 736 Date: October 2006 Supercedes: IM 736-3 MicroTech II® Chiller Unit Controller BACnet® Communication Module (MS/TP) • WSC Water-Cooled Centrifugal, Single-Compressor • WDC Water-Cooled Centrifugal, Dual-Compressor • WPV Water-Cooled Centrifugal, Single-Compressor • HSC Water-Cooled Single-Compressor Centrifugal, Heat Recovery • HDC Water Cooled Dual-Compressor Centrifugal, Heat Recovery • TSC Water-Cooled Single-Com
Contents Figures ................................................................................................................................................... 2 Revision History.................................................................................................................................... 3 Reference Documents............................................................................................................................ 3 Limited Warranty ...............................
Revision History IM736-0 January 24, 2003 Initial release IM736-1 May, 2005 Added WGS, WMC, HSC, HDC and TSC to front page and to the “Reference Documents” section Edited part numbers in parts list Added note in “Unit Setup for BACnet Control” section Added note in “Changing the MSTP Data Transmission Rate” section IM736-2 November, 2005 Added module location, power wiring, and set screen information for scroll and screw compressor chillers. Added Table 1 and Password table.
Limited Warranty Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com. Notice Copyright © 2006 McQuay International, Minneapolis MN. All rights reserved throughout the world. McQuay International reserves the right to change any information contained herein without prior notice. The user is responsible for determining whether this software is appropriate for his or her application.
General Information This manual contains the information you need to install the BACnet® Communication Module, incorporate it into the network, and maintain it. ! WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment must be properly grounded. Only personnel that are knowledgeable in the operation of the equipment being controlled must perform connections and service to the MicroTech II Chiller Unit Controller. ! CAUTION Static sensitive components.
Description The BACnet Communication Module incorporates a MicroTech II Chiller Unit Controller into a BACnet Local Area Network (LAN). It supports the BACnet MS/TP (EIA 485) data link layer (physical layer). The BACnet Communication Module mounts in the MicroTech II Chiller Unit Controller panel. The BACnet Communication Module is a rectangular metal enclosure with connectors and an indicator on the front panel.
Component Data Figure 2 shows the external connectors of the BACnet Communication Module. Figure 2. BACnet Communication Module External Connectors (Top View) BCM Chiller (RS232) MCQ–3302742 Rev.___ BCM Ethernet PWR BCM RS485 (Isolated) 24VAC Connectors The BACnet Communication Module uses two of the connectors mounted on the top panel. Chiller (RS232) This connector is the interface between the MicroTech II Chiller Unit Controller and the BACnet Communication Module.
Installation The BACnet Communication Module can be factory or field installed. The sales representative should use the appropriate chiller selection software program in McQuayTools™ to include the BACnet Communication Module with the unit. For field installation, the BACnet Communication Module kit may be ordered through the McQuay sales office or through McQuay Parts. The BACnet Communication Module kit includes the BACnet Communication Module, cables, serial card connector, and this installation manual.
6. Figure 5 details the Serial Card slot with the 8-pin plug that mates to the receptacle on the RS 232 Serial Interface Card. Grasp the RS 232 Serial Interface Card, with the network connector on the underside. The 8-pin receptacle must mate to the 8-pin plug in the MicroTech II Chiller Unit Controller. The plug has a guide on each end to direct the card into the mating guide on the receptacle.
c. Keeping the RS 232 Serial Interface Card level, move it in the slot until you feel the connectors line up. The correct position seems to be level, toward the left side of the slot, and down slightly from the top. d. When you feel the connectors align, press the RS 232 Serial Interface Card into the connector. Verify that it is firmly seated in the connector. 8. Replace the cover on the Serial Card slot. Slip the cover over the network connector plug. 9.
Figure 4. Serial Card Slot in Unit Controller ® Ai r Condition ing Serial Card Slot IDC15 ID7 ID6 ID5 ID4 ID3 ID2 Y4 Y3 Y2 Y1 VG0 ID1 J5 J4 VG J19 ID15 8-Pin Connector for Serial Card ID15H Figure 5. Serial Card Slot Detail Unit Setup for BACnet Network Control Setup for MicroTech II Centrifugal Chiller Network Control: 1. 2. 3. 4. Disable the chiller. The chiller should not be operating while performing this setup. At the chiller touchscreen interface panel: a.
Table 2. MicroTech II Chiller Unit Controller Menu Screens Model Menu Screen Password AGZ-A ACZ-A AGZ-B ACZ-B AGS-B AGS-C WGS WGZ 9 6 9 7 12 14 15 10 2001 2001 2001 2001 8945 8453 8745 2001 NOTE: Models AGZ-A/B, ACZ-A/B, and WGZ have one unit controller, while models AGS-B/C and WGS have one unit controller and multiple circuit controllers. Unit settings for AGS-B/C and WGS models are adjusted on the unit controller. 3. 4.
Integration Access to Properties To access a property, you must specify the object identifier including the device object identifier or the object name including the device object name and the property identifier. See the MicroTech II Chiller Unit Protocol Information document (ED 15062) for details. Configuring the Unit Controller The MicroTech II Chiller Unit Controller and BACnet Communication Module are designed, programmed, and configured at the factory.
Once these steps are complete and your PC is on a similar IP address and subnet mask as the BACnet Communication Module, follow the instructions listed below to download the firmware from the McQuay website. 1. Go to www.mcquay.com\Products\Controls\Application Software and click on the “MicroTech II Chiller BACnet Communication Module v1.xx Update” file. 2. Save the contents of the zip file to a selected folder on your hard drive. 3. Open the zip file from your hard drive and print this section of IM 736.
Figure 6.
Changing the Network Settings The BACnet Communication Module is assigned a factory default IP address and Subnet Mask. These are only temporary but are required so that you know where to access the BACnet Communication Module in order to change network parameters. The BACnet Communication Module is configured using a minimal HTTP server that is accessed using Internet Explorer®.
8. Make changes to the configuration file in the BACnet Communication Module (see the Changing the MS/TP Data Transmission Rate section.) 9. Reboot the BACnet Communication Module to change the settings. 10. In the browser on your computer: a. Go to Tools/Internet Options/Connections/LAN Settings. b. Restore the settings as noted in Step 6a. 11. Restore the network settings on your computer (see following page for instructions based on your operating system.
To restore the network settings in a Microsoft Windows NT computer: 1. Open the Control Panel on your computer. 2. Open the Network Applet. 3. Select the Protocols tab. 4. Select the TCP/IP-Ethernet card combination on your computer. 5. Select the Properties button. 6. Select the appropriate adapter. 7. Restore the settings as previously noted. 8. Click the Apply button. Network Setting for Microsoft Windows 2000 To change the network settings in a Microsoft Windows 2000 computer: 1.
Figure 7. Ping and Response Configuring the HTTP Interface To change the parameters in the HTTP Interface, select the Configure button at the bottom of the HTTP Interface home page. Figure 6 shows the Configuration page in the HTTP Interface. To Configuring the HTTP Interface: 1. Connect to the BACnet Communication Module via the Ethernet port for configuration. 2. Browse to the HTTP Interface page Figure 6 3. Select the Configure button. The HTTP Configuration page opens (see Figure 9.) 4.
! WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment has exposed electrical connections inside BACnet Communication Module. Only personnel that are knowledgeable in the operation of this equipment must perform connections and service to the BACnet Communication Module. To Change the MS/TP Data Transmission Rate: 1. Remove power from the BACnet Communication Module. 2.
Figure 8. MS/TP Data Transmission Rate Switch Processor Isolat or Transf orm MS/TP Dat a Transmission Rat e Def ault Posit ion is High Note: This switch has been replaced with jumpers on newer versions of the isolator module. Contact the McQuay Controls Customer Support group with any questions regarding this switch. Note: Drawing shown as mounted on the chiller panel door with connectors on top.
Figure 9. BACnet Communication Module Configuration Page Configurable Parameters Table 3 defines the configurable parameters of the BACnet Communication Module in the same order as they appear on the HTTP Configuration page (see Figure 9). Change parameters as required for you network.
Table 3. Configurable Parameters Section Password Parameter Password New Password Device Device Instance LAN Type MS/TP Client Timeout Normal or Busy Network/The time the BACnet Communication Module waits for a response to a ConfirmedEventNotification. Limits the frequency, in minutes, of Who Is requests the BACnet Communication Module issues. Password that allows the BACnet Communication Module to be reinitialized from the network.
Section Parameter Value (Range)/Definition Initial Value/Note MS/TP MAC address 0-127/Media Access Control Address (unique hardware address) of the BACnet Communication Module. Max Masters Maximum Number of Master Controllers currently on the network that the BACnet Communication Module can poll. Maximum Number of Information Frames the BACnet Communication Module can send before it must pass the token. 1/See the BAS systems integrator. This value must be entered as a hexadecimal value.
Service Information Test Procedures If you can control the unit from its keypad, but you are not able to communicate with unit via the network: • Check the network wiring • Check communications • Use the standard TCP/IP suite of protocols to check your connectivity with other devices. For example, type “ping .” If you get a response from that IP address, you are connected to the BACnet Communication Module.
Appendix A: Hexadecimal Conversion Table Dec 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 26 Hex 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F Dec 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 Hex 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F Dec 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 9
This document contains the most current product information as of this printing. For the most current product information, please go to www.mcquay.com. All McQuay equipment is sold pursuant to McQuay’s Standard Terms and Conditions of Sale and Limited Warranty. (763) 553-5330 • www.mcquay.