94 WGS 130A to 190A OM WGS-5
BAS Interface
The MicroTech II controller is equipped with the Protocol Selectability feature, an
exclusive McQuay feature that provides easy unit interface with a building automation
system (BAS). If the unit will be tied into a BAS, the controller should have been
purchased with the correct factory-installed interface module. The modules can also be
added in the field during or after installation.
If an interface module was ordered, one of the following BAS interface installation manuals
was shipped with the unit. Contact your local McQuay sales office for a replacement, if
necessary or download from www.mcquay.com.
IM 735, L
ONWORKS Communication Module Installation
IM 736, BACnet Communication Module Installation
IM 743, Modbus Communication Module Installation
ED 15062-0, MicroTech II Chiller Protocol Information – BACnet and L
ONWORKS
ED 15063-0, MicroTech II Chiller Unit Controller Protocol Information – Modbus
Unit Controller Setting
Settings are made in the unit controller. Set Unit Setpoints, Menu 1 is set to Source =
Network. The specific protocol being used is set in Set Unit Setpoints, menu 15.
Connection to Chiller
Connection to the chiller for all BAS protocols will be at the unit controller. An interface
card will have to be installed in the unit controller depending on the protocol being used.
NOTE:
In this revision (D), the starter electric data in the table below is now available to the
Building Automation System at the unit control supervisor port:
Starter Parameter
Supervisor Type Index Number
Compressor Average Amps Analog Output 26
Compressor Kilowatts Analog Output 27
Compressor Average Volts Analog Output 29
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