Daikin Enfinity Installation And Maintenance Manual

Daikin Enfinity Installation And Maintenance Manual Manual pdf 26 page image

www.DaikinApplied.com 26 LARGE VERTICAL WSHP IM 1059-127 If the thermostat operates but stops after a brief period:a. Is there proper airflow? Check for dirty filter,incorrect fan rotation (3-phase fan motors only),or incorrect ductwork.b. Is there proper water flow rate within temperaturelimits? Check water balancing; back-flush unit ifdirt-clogged.8 Check for vibrating refrigerant piping, fan wheels, etc.9 Do not lubricate the fan motor during the first year ofoperation as it is pre-lubricated at the factory.10 Field supplied relays installed on the input terminalsW1, W2, Y1, Y2 or G may introduce electrical noise.Never install relay coils in series with the inputs.Control optionsThe control enclosure houses the major operatingelectrical controls including the MicroTech III controllerand I/O expansion module, control transformer,compressor relays and fan relay. Each component iseasily accessed for service or replacement.Three unique control choices are offered with theMicroTech III control system:■ Standalone operation using a MicroTech IIIcontroller and I/O expansion module■ MicroTech III controller with I/O expansion moduleand L onWorks® communication module■ MicroTech III controller with I/O expansion moduleand BACnet® communication moduleEach option features direct quick-connect wiring to allunit-controlled components for “clean” wiring inside thecontrol box. Each control circuit board receives powerfrom a 75 VA transformer.start -uPFigure 18: Control optionsControl Description Application ProtocolMicroTech III(Standalone) UnitController with I/OExpansion ModuleThe MicroTech III controller is astandalone microprocessor-basedcontrol board conveniently locatedin the unit control enclosure for easyaccessibility. The board is designed toprovide thermostat control of a WaterSource Heat Pump using a two-stagewall thermostat. The unit controllerprovides unit-wide control of the WSHPand control of the first refrigerant circuit.Each unit controller is factoryprogrammed, wired, and tested forcomplete control of single zone,standalone operation of your DaikinWater Source Heat Pump.Unit-mounted or wall-mounted thermostat or roomsensorThe I/O Expansion Module is anextension of the Microtech III controllerand provides control of the secondrefrigerant circuit. External LED statuslights display fault conditions to provideeasy troubleshooting and diagnosis ofthe second circuit.Allows for:Control of second refrigeration circuit,secondary heating options andcooling/dehumidification options.LonWorksCommunicationModuleThe MicroTech III control systemaccepts a plug-in LonWorkscommunication module to providenetwork communications and addedfunctionality to easily integrate withan existing BAS. The communicationmodule can be factory- or field-installedand is tested with all logic required tomonitor and control the unit.LonTalk application protocol isdesigned for units that are integratedinto a L onWorks communicationnetwork for centralized schedulingand management of multiple heatpumps.L onM ark 3.4 CertifiedBACnetCommunicationModuleThe MicroTech III controller accepts aplug-in BACnet communication moduleto provide network communicationsand added functionality to easilyintegrate with an existing BAS. Thecommunication module can be factory-or field-installed and is tested with alllogic required to monitor and controlthe unit.Designed to be linked with acentralized building automationsystem (BAS) through a BACnetcommunications network forcentralized scheduling andmanagement of multiple heat pumps.BACnetMS/TP