Daikin Enfinity VFC - CONTROLS; MicroTech III Controller with BACnet Communication

Controls
www.DaikinApplied.com 19 EnnityVerticalWaterSourceHeatPumps• IM 930-6
MicroTech III Controller with
BACnet Communication Module
ForinstallationandoperationinformationonMicroTech
IIIunitcontrollerandotherancillarycomponents,see:
■ IM928-MicroTechIIIBACnetCommunication
Module
■ OM931-MicroTechIIIUnitControllerforWater
SourceHeatPumpsOperationandMaintenance
Manual
■ IM955-MicroTechIIIWallSensorForusewith
MicrotechIIIUnitController
Daikinwatersourceheatpumpsareavailablewitha
BACnetMS/TPcommunicationmodulethatisdesigned
tocommunicateoveraBACnetMS/TPcommunications
networktoabuildingautomationsystem(BAS).Itcanbe
factoryoreld-installed.
Theunitcontrollerisprogrammedandtestedwithallthe
logicrequiredtomonitorandcontroltheunit.Anoptional
wallsensormaybeusedwiththecommunication
moduletoprovidelimitedlocalcontrolofthewater
sourceheatpump.Theunit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.
Themodulemakesoperationaldataandcommands
availableonacommunicationsnetworkusingBACnet
objectsandproperties:
■ Thenetworkcableisashieldedtwisted-paircable
Networkcommunicationsrunupto76.8Kbps
■ DIPswitchesonthecontrollerenabletheMS/TP
MACaddresstobesetintherange0-127
■ FourgreenstatusLEDsonthecommunication
moduleindicatecommunicationactivityonthe
MS/TPcommunicationnetworkandwiththeunit
controller
Figure 15: MicroTech III BACnet Water Source Heat Pump
Snap-in Communication Module
MicroTech III Unit Controller with
BACnet MS/TP Communication
Module orchestrates the following unit
operations:
■ Enableheatingandcoolingtomaintainsetpoint
basedonaroomsensor
■ 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
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)(factory
installed)
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
Thecommunicationmoduleprovidesaccesstosetpoints
for operational control
Available wall sensors include:
■ RoomsensorwithLEDstatusandtenantoverride
button
■ RoomsensorwithLEDstatus,tenantoverride
button,and±3°Fsetpointadjustment
■ RoomsensorwithLEDstatus,tenantoverride
button,55°to95°Fsetpointadjustment