ED15117
5
Introduction
This document contains the necessary information you need to incorporate a Daikin McQuay
Magnitude™ Chiller Unit Controller into a building automation system (BAS). It lists all BACnet
®
properties, L
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®
variables, and corresponding Magnitude Chiller Unit Controller data points. It
also contains the BACnet Protocol Implementation Conformance Statement (PICS). BACnet and
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terms are not defined. Refer to the respective specifications for definitions and details.
Unit Controller Data Points
The Magnitude Chiller Unit Controller contains data points or unit variables that are accessible from
three user interfaces: the unit controller OITS panel, a BACnet network (BACnet/IP, Ethernet, or
MS/TP), or a L
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network. Not all points are accessible from each interface. This manual lists
all important data points and the corresponding path for each applicable interface. Refer to OM 1034
(available on www.mcquay.com) for display details. This document contains the network details
necessary to incorporate the Magnitude Chiller Unit Controller into the network.
Protocol Definitions
The Magnitude Chiller Unit Controller can be configured in either an interoperable BACnet or
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network. The unit controller must have the corresponding communication module installed
for network integration (see Reference Document section for corresponding part numbers). There are
three communication modules: BACnet IP/Ethernet, BACnet MS/TP (Master/Slave Token Passing),
and L
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.
BACnet Protocol
BACnet is a standard communication protocol for Building Automation and Control Networks
developed by the American National Standards Institute (ANSI) and American Society of Heating,
Refrigeration and Air-conditioning Engineers (ASHRAE) specified in ANSI/ASHRAE standard 135-
2004. It addresses all aspects of the various systems that are applied to building control systems.
BACnet provides the communication infrastructure needed to integrate products manufactured by
different vendors and to integrate building services that are now independent.
The Magnitude Chiller Unit Controller is tested according to the BACnet Testing Laboratory (BTL)
Test Plan.
It is designed to meet the requirements of the BACnet Standard (ANSI/ASHRAE 135-2004)
as stated in the Protocol Implementation and Conformance Statement (PICS). However, it is not BTL
listed. The PICS are located at the end of this manual or the separate PICS document, ED 15119
(available on
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Networks
A control network specification for information exchange built upon the use of the LonTalk
®
protocol
for transmitting data developed by the Echelon
®
Corporation.
LonTalk Protocol
A protocol developed and owned by the Echelon Corporation. It describes how information should be
transmitted between devices on a control network.
LonMark
®
Certification
LonMark certification is an official acknowledgement by the LonMark Interoperability Association that
a product communicates using the LonTalk protocol and transmits and receives data per a standard
LonMark functional profile. The L
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communication module is LonMark 3.4 certified in
accordance with the Chiller functional profile.
