Specifications

Page 16 of 32 / IM 1060-3
MicroTech III Controller with
Communication Modules Features
The MicroTech III Controller with LonWorks or BACnet
Communication Module orchestrates the following unit
operations:
■ Enableheatingandcoolingtomaintainspace
temperature setpoint based on a room sensor setting
■ Enablefanandcompressoroperation
■ Monitorsallequipmentprotectioncontrols
■ Monitorsroomanddischargeairtemperatures
■ Monitorsleavingwatertemperature
■ Relaysstatusofallvitalunitfunctions
An amber, on-board status LED indicates the status of the
MicroTech III LonWorks or BACnet module.
The MicroTech III unit controller with
communication module includes:
■ ReturnAirTemperaturesensor(RAT)(eld-installed)
■ DischargeAirTemperaturesensor(DAT)(eld-installed)
■ LeavingWaterTemperaturesensor(LWT)
Note: Refer to IM 956-X for details to install (RAT) & (DAT)
sensors.
When an optional wall-mounted room temperature sensor is
connected to the unit controller, the Return Air Temperature
(RAT) sensor must not be installed. A wall-mounted room
temperature sensor and the return air temperature sensor
must not be connected simultaneously or the unit will not
operate properly.
CAUTION
Available Wall Sensors Include:
■ Roomsensor
■ RoomsensorwithLEDstatusandtenantoverride
button
■ TemperaturesensorwithLEDstatus,timed-override
button, and ±3°F setpoint adjustment
■ RoomsensorwithLEDstatus,timed-override
MicroTech® III Controller
with LonWorks® or BACnet
Communication Module
EachEnnityLargeHorizontalWaterSourceHeatPumpcan
be equipped with a LonWorks or BACnet communication
module. The LonWorksmoduleisLonMark3.4certiedand
designed to communicate over a LonWorks communications
network to a Building Automation System (BAS). The BAC-
net module is designed to communicate over a BACnet MS/
TP communications network to a building automation system.
Both communication modules are microprocessor-based and
canbefactoryoreld-installed.
The communication modules are programmed and tested with
all the logic required to monitor and control the unit. Optional
wall sensors may be used with the communication modules to
provide limited local control of the Horizontal Water Source
Heat Pump. The MicroTech III controller monitors water and
air temperatures and passes information to the communication
module. The module communicates with the BAS, to provide
network control of the Water Source Heat Pump.
MicroTech III LonWorks Communication
Module
The LonWorks communication module is designed for units
that are integrated into a LonWorks communication network
for centralized scheduling and management of multiple heat
pumps.
MicroTech III BACnet Communication
Module
Designed to be linked with a centralized building automation
system (BAS) through a BACnet communications network
for centralized scheduling and management of multiple heat
pumps.