McQuay ACZ-B Installation Manual
Installation and Maintenance Manual
IM 906-2
MicroTech II®
McQuay 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
• TSC Water-Cooled Single-Compressor Centrifugal, Templifier
• WMC, WMM Water-Cooled Centrifugal, Magnetic Bearing
Group: Controls
Part Number: IM 906
Date: December 2010
Supersedes: IM 906-1
• AGZ–A, B, C Air-Cooled Global Scroll
• ACZ–A, B Air-Cooled Scroll Condensing Unit
• WGZ, TGZ Water-Cooled Global Scroll
• AGS–A, B, C, D, DP Air-Cooled Global Screw
• WGS Water-Cooled Global Screw
NOTICE
Use this manual to physically install the McQuay MicroTech II Communication Module into the chiller unit
controller and connect the chiller unit controller to your network. Use the appropriate McQuay Engineering
Data (ED), known as the Protocol Information document, to integrate the unit into your network. The Protocol
Information document contains addressing details, BACnet® protocol information, and a list of the data points
available to the network. See the Reference Documents section of this manual for Protocol Information
document numbers. MicroTech II control integration literature is available from your local McQuay
International sales representative and www.mcquay.com.
Contents
Figures................................................................................................................................................... 2
Revision History....................................................................................................................................4
Reference Documents............................................................................................................................ 4
Limited Warranty.................................................................................................................................. 4
Introduction............................................................................................................................5
Recognize Safety Symbols, Words and Labels ..................................................................................... 5
General Information...............................................................................................................6
Description............................................................................................................................................ 6
Application............................................................................................................................................ 6
Component Data.................................................................................................................................... 7
Light Emitting Diodes (LEDs) .......................................................................................................... 7
BACnet Network Connector ............................................................................................................. 8
8-Pin Header......................................................................................................................................8
P1, P2 and P3 Jumpers...................................................................................................................... 8
Pushbutton......................................................................................................................................... 8
Installation..............................................................................................................................9
Mounting............................................................................................................................................... 9
Contents of the BACnet Communication Module Kit....................................................................... 9
Installing a new BACnet Communication Module............................................................................ 9
Mounting a BACnet Communication Module................................................................................... 9
Replacing an Existing BACnet Communication Module................................................................ 10
Meaning of the Jumpers .................................................................................................................. 11
Integration ............................................................................................................................12
Configuring the Unit Controller.......................................................................................................... 12
Network Connection............................................................................................................................ 12
BACnet MS/TP Addressing ............................................................................................................ 12
Configuring the BACnet Communication Module.............................................................................. 12
Restarting and Resetting the BACnet Communication Module .......................................................... 12
Restarting the BACnet Communication Module............................................................................. 12
Resetting Factory Defaults when the Chiller is Off:........................................................................ 13
Resetting Factory Defaults when the Chiller is On:......................................................................... 13
Service Information .............................................................................................................14
Test Procedures................................................................................................................................... 14
Parts List ............................................................................................................................................. 14
Installation Kit................................................................................................................................. 14
Appendix A: Chiller BACnet Communication Module Configuration Tool....................15
Introduction......................................................................................................................................... 15
The Configuration Tool as a BACnet Device.................................................................................. 15
Windows and PC Requirements.......................................................................................................... 15
Windows Requirements................................................................................................................... 15
BACnet MAC Layer Support.......................................................................................................... 15
PC Requirements............................................................................................................................. 15
Install and Set up the Configuration Tool ........................................................................................... 16
Overview of Components................................................................................................................ 16
Installation and Setup...................................................................................................................... 16
Launch and use the Configuration Tool to Set Network Parameters................................................... 16
Verify BACnet Communications......................................................................................................... 23
Download BACnet Firmware Files..................................................................................................... 23
BACnet MS/TP MAC Layer Select Options....................................................................................... 25
Troubleshooting Guide.......................................................................................................26
Figures
Figure 1. BACnet Communication Module External Connectors (Top View)...................................... 7
Figure 2. Serial Card Slot in Unit Controller....................................................................................... 11
IM 906-2 2
Figure 3. Serial Card Slot Detail ......................................................................................................... 11
Figure 4. BACnet MAC Layer Select Dialog Box .............................................................................. 17
Figure 5. Initiate Communications...................................................................................................... 18
Figure 6. Configuration Tool Communicating Properly..................................................................... 18
Figure 7. Change Device Instance and Re-establish Communications............................................... 20
Figure 8. Change Baud Rate ........................................................................................................... 20
Figure 9. BACdoor OEM Client Library............................................................................................ 22
Figure 10. BACdoor OEM Client Library Configuration ................................................................... 22
Figure 11. Reading Present Values using the Test Tab....................................................................... 23
Figure 12. System Tab ........................................................................................................... 24
Figure 13. BACnet MS/TP MAC Layer Status Window.................................................................... 25
Figure 14.MS/TP MAC Layer Status Expanded Window................................................................... 25
IM 906-2 3
Revision History
IM 906 February 2008 Initial release
IM 906-1 July 2009 Removed reference to requiring download of CSV file for metric units (it is not required). See
IM 906-2 September 2010 Removed references to AGZ. Corrected Table 13 – Max Masters & Max Info Frames were transposed.
Appendix B for details on using the BACnet Configuration Tool to change from English to Metric
units of measure.
Modified BCM Configuration Tool section.
Reference Documents
Number Company Title Source
ANSI/ASHRAE 1352001
IMM AGS, IMM
AGSD, IMM AGSDP
IMM ACZ/AGZ McQuay International MicroTech II Air-Cooled Condensing Unit Installation and Maintenance
IMM ACZ1 McQuay International MicroTech II Air-Cooled Condensing Unit Installation and Maintenance
IMM AGZ1 McQuay International MicroTech II Air-Cooled Scroll Chiller Installation and Maintenance
IMM WGZ, IMM
WGZC
IMM WMC McQuay International MicroTech II Magnetic Bearing Centrifugal Chiller Installation and
IMM WSCWDC McQuay International MicroTech II Chiller Unit Controller Installation and Maintenance
IMM WGS McQuay International MicroTech II Water Cooled Screw Compressor Chiller Installation and
OM AGS, OM AGSD,
OM AGSDP
OM CentrifMicro II McQuay International MicroTech II Unit Controller for Centrifugal Chillers and Templifiers
ED 15062 McQuay International MicroTech II Chiller Unit Controller Protocol Information, BACnet
OM WGS McQuay International MicroTech II Water-Cooled Screw Chiller Operating Manual www.mcquay.com
OM WMC McQuay International MicroTech II Magnetic Bearing Compressor Chiller www.mcquay.com
IOMM TSC McQuay International MicroTech II Templifier Single Compressor Centrifugal Installation,
American Society of Heating,
Refrigerating and AirConditioning Engineers
McQuay International MicroTech II Air-Cooled Screw Chiller Installation and Maintenance
McQuay International MicroTech II Water-Cooled Scroll Chiller Installation Manuals www.mcquay.com
McQuay International MicroTech II Air-Cooled Screw Chiller Operating Manuals www.mcquay.com
BACnet® A Data Communication Protocol for Building Automation
and Control Networks
Manuals
Manual
Manual
Manual
Maintenance Manual
Manual
Maintenance Manual
Operating Manual
MS/TP and L
Operation, and Maintenance Manual
ONWORKS
®
Networks
www.ashrae.org
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
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 © 2010 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.
® ™ The following are tradenames or registered trademarks of their respective companies: BACnet
from the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.; Windows
from Microsoft Corporation; McQuay and MicroTech II from McQuay International.
IM 906-2 4
Introduction
Recognize Safety Symbols, Words and Labels
The following symbols and labels are used throughout this manual to indicate immediate or potential
hazards. It is the owner and installer’s responsibility to read and comply with all safety information
and instructions accompanying these symbols. Failure to heed safety information increases the risk of
property damage and/or product damage, serious personal injury or death. Improper installation,
operation and maintenance can void the warranty.
!
DANGER
Dangers indicate a hazardous situation which will result in death or serious injury if not
avoided.
!
WARNING
Warnings indicate potentially hazardous situations, which can result in property damage,
severe personal injury, or death if not avoided.
!
CAUTION
Cautions indicate potentially hazardous situations, which can result in personal injury or
equipment damage if not avoided.
IM 906-2 5
General Information
This manual contains the information you need to install the BACnet® Communication Module on a
McQuay Chiller Unit Controller, incorporate it into the BACnet network, and maintain it.
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
Chiller Unit Controller.
Static sensitive components. Can cause equipment damage.
Discharge any static electrical charge by touching the bare metal inside the control panel
before performing any service work. Never unplug cables, circuit board terminal blocks, or
power plugs while power is applied to the panel.
This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with this instruction manual, may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his or her own
expense. McQuay International disclaims any liability resulting from any interference or
for the correction thereof.
DANGER
!
!
CAUTION
NOTICE
Description
Application
The MicroTech II® BACnet Communication Module incorporates a McQuay 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 is a printed circuit board that mounts in the Chiller Unit
Controller panel. Figure 2 on page 11 shows a drawing of the BACnet Communication Module itself.
The BACnet Communication Module connects the Chiller Unit Controller to a building automation
system (BAS) on a BACnet local area network. It is the interface for the exchange of BACnet objects
between the network and the unit controller.
IM 906-2 6
Component Data
Pushbutton
-
Figure 1 shows the external connectors of the BACnet Communication Module.
Figure 1. BACnet Communication Module External Connectors (Top View)
Status LEDs
Network Connector
GND
Light Emitting Diodes (LEDs)
The BACnet Communication Module has a Status LED and an RS485 LED to indicate
communication activity and status of the BACnet Communication Module. These indicators are
visible even when the module is installed in the Chiller Unit Controller.
Status LED
The status LED indicates the communication state between the BACnet Communication Module and
the Chiller Unit Controller.
During power-up, the status LED will show the following sequence:
• Off
• 2 seconds after startup: quick flashing red-green
• 5 seconds after startup: steady green
• 50 seconds after startup: regularly flashing (see Communication State with the BACnet
Communication Module section below for color descriptions)
Communication State with the BACnet Communication Module
After startup has completed, the Status LED will regularly blink to show the communication status
between the BACnet Communication Module and the Chiller Unit Controller. The table below
describes the different color and states.
Jumpers (P1, P2 & P3)
RS485 LEDs
+
8-Pin Header
Table 1. Status LED Definitions
Status LED Color Meaning
Quick Flashing Green Communication has been established between the BACnet
Communication Module and the Chiller Unit Controller.
Slow Flashing Red Communication has not been established between the BACnet
Communication Module and the Chiller Unit Controller.
Green/Red Flashing BACnet Communication Module detects an error or a temporary
answer fault from the Chiller Unit Controller.
IM 906-2 7
RS485 LEDs
The RS485 LEDs shows the communication status between the BACnet Communication Module and
the BACnet MS/TP network. The table below describes the status of the RS485 LEDs.
Table 2. Status of RS485 LEDs Definitions
RS 485 LED Color Meaning
Green with occasional
red flashes
Green and red ON
together
Communication is established. The BACnet MS/TP definition is as
follows:
• Green ON: BACnet Communication Module keeps the token
• Green OFF: BACnet Communication Module does not keep the
• Red ON: Poll-For-Master; search for a master to pass the token to
Communication is not established. The BACnet MS/TP definition is that
the communication status is in a state of continuous Poll-For-Master.
Possible explanations for this are as follows:
• Connection error
• No network is found due to:
BACnet Network Connector
token
• Electrical connection error
• Communication settings are not compatible with the other
network devices that are connected to the network
An RS485 connector connects the BACnet Communication Module to the MS/TP Network.
8-Pin Header
The 8-pin header connects the Chiller Unit Controller to the BACnet Communication Module.
P1, P2 and P3 Jumpers
Jumpers P1, P2 and P3 are located inside the front opening of the cover.
• Jumper P1 adds a 510-ohm polarization resistance between the negative data line (-) and GND
• Jumper P2 adds a 120-ohm terminal resistance between the two data lines (+) and (-)
• Jumper 3 adds a 510-ohm polarization resistance between the positive data line (+) and the
+5Vdc internal voltage
Refer to the Mounting a BACnet Communication Module section on page 9 for information on how
to set these jumpers.
Pushbutton
The pushbutton is used to either reboot the BACnet Communication Module or temporarily restore
the factory defaults. Refer to the section titled Restarting and Resetting the BACnet Communication
Module on page 12 for more information on using the pushbutton.
IM 906-2 8
Installation
!
The BACnet Communication Module is available as a factory-installed or a field-installed option.
The BACnet Communication Module kit may be ordered via McQuay SelectTools or McQuay
Parts. See the Installation Kit section on page 14 for additional information.
Mounting
Contents of the BACnet Communication Module Kit
Installing a new BACnet Communication Module
CAUTION
Electrostatic discharge hazard.
Can cause equipment damage.
This equipment contains sensitive electronic components that may be damaged by
electrostatic discharge from your hands. Before you handle a communications module, you
need to touch a grounded object, such as the metal enclosure, in order to discharge the
electrostatic potential in your body.
The following is the list of items included in the field-installed kit:
• The BACnet Communication Module circuit board
• Plastic cover for the module
• Three jumpers
• Plug-in connector
• Ferrite-lined plastic enclosure (for noise reduction, if desired)
Install a BACnet Communication Module on the Chiller Unit Controller to incorporate it into an
existing BACnet network.
Mounting a BACnet Communication Module
To mount a BACnet Communication Module
DANGER
!
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
Chiller Unit Controller.
1. Remove power from the Chiller Unit Controller.
2. Locate the Serial Card slot on the Chiller Unit Controller (see Figure 3 on page 11 ).
3. Remove the cover from the Serial Card slot if it has not already been removed. Use a small
screwdriver to carefully pry the cover off from one end.
4. Grasp the BACnet Communication Module, with the network connector on the underside. The 8-
pin header must mate to the 8-pin plug in the Chiller Unit Controller. The plug has a guide on
each end to direct it into the mating guide on the BACnet Communication Module header. Figure
3 on page 11 details the Serial Card slot with the 8-pin plug that mates to the header on the
BACnet Communication Module.
IM 906-2 9
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