McQuay MHW Geothermal Ran Installationshandbuch

Installation & Maintenance DataConsole Water Source Heat PumpsR-410A Models MHC Standard Range & MHW Geothermal R

Page 10 of 38 / IM 985-2Optional Factory-Installed Motorized & Hand Valve AssembliesConsolewatersourceheatpumpscanbeconguredwithfactory-

IM 985-2 / Page 11 of 38Motorized Isolation ValveThe2-waymotorizedvalvekitisavailableasafactory-in-stalledandwiredoptionormaybeordered

Page 12 of 38 / IM 985-2Cleaning & Flushing Water System CAUTION Prior to rst operation of any unit, the water circulating system must be clea

IM 985-2 / Page 13 of 38Electrical ConnectionsNote: Installation and maintenance must be performed only by qualied personnel who are familiar with l

Page 14 of 38 / IM 985-2Figure 11: Switching to Electric Heat DetailTable 3: Electric Heater Current and Power Nominal Sizes 007, 00

IM 985-2 / Page 15 of 38MicroTech® III Unit ControllerTheMicroTechIIIUnitControllerincludesbuilt-infeaturessuch as random start, compressor ti

Page 16 of 38 / IM 985-2Table 7: I/O Expansion Module LED & Fault Outputs Status LED's Thermostat Alarm Mode / Fault

IM 985-2 / Page 17 of 38Figure 13: LonWorks Communication ModuleMicroTech III Unit Controller with LonWorks Communica-tion Module orchestrates the fol

Page 18 of 38 / IM 985-2MicroTech III Unit Controller with BACnet Communication Module orchestrates the following unit operations:  Enableheatingan

IM 985-2 / Page 19 of 38MicroTech® III Unit Controller Terminals Locations and Descriptions H1 - 1 24 24 VAC Power Input H1 - 2 C 24 VAC Common

Page 2 of 38 / IM 985-2ContentsModel Nomenclature ...3Receiving and Storage ...

Page 20 of 38 / IM 985-2Note: A random start delay time between 180 and 240 seconds is generated at power up.Figure 15: MicroTech III Unit Controller

IM 985-2 / Page 21 of 38Figure 17: LonWorks Communication Module Placement on MicroTech III Unit Controller

Page 22 of 38 / IM 985-2Typical Wiring DiagramsMicroTech III Unit Controller for Sizes 007-015 – 208/230/60Hz/1-PhaseNotes: Transformer: Unused wire t

IM 985-2 / Page 23 of 38Typical Wiring DiagramsMicroTech III Unit Controller With Electric Heat for Size 018 – 208/230/60Hz/1-Phase Table B 208V RED

Page 24 of 38 / IM 985-2Typical Wiring DiagramsMicroTech III Unit Controller with Communication Module and Wall-Mounted Room Temperature Sensor – 265/

IM 985-2 / Page 25 of 38Start-upUnits must be checked for water leaks upon initial water system start-up. Water leaks may be a result of mishan-dling

Page 26 of 38 / IM 985-2System congurations: 1-stageheat,1-stagecool,heatpumpTiming: Anti-short Cycle:4minutes(BacklightOperation)Terminatio

IM 985-2 / Page 27 of 38Non-Programmable Electronic Thermostat (P/N 668811001)Non-Programmable, Auto Changeover, Fan Speed Control, Hardwired  Single

Page 28 of 38 / IM 985-2Wireless Temperature Control (T9000)The T9000 Wireless Temperature Control is designed to provide precision temperature contro

IM 985-2 / Page 29 of 38SpecicationsThermistorresistance(10kΩ)(Conforms to advance thermal products curve 2)Ambient Temperature Limits:Shipping an

IM 985-2 / Page 3 of 38Model NomenclatureNote: For illustration purposes only. Not all options available with all models. Please consult McQuay Sales

Page 30 of 38 / IM 985-2Figure 24: Temperature Sensor Wiring to MicroTech III Unit Controller (669529001)MicroTech III Unit Con-troller TB1 Terminals

IM 985-2 / Page 31 of 38Outside Air DamperField-installed Option CAUTION To prevent inltration of ambient conditions, it is the responsibil-ity of

Page 32 of 38 / IM 985-2Figure 26: Manual Outside Air Damper Assembly (See IM 974 for detailed installation instructions)SealSubbaseManual Outside Dam

IM 985-2 / Page 33 of 38TroubleshootingThe in and outs of R-410AR-410Aisanon-ozonedepletingblendoftworefrigerants-HFC-125andHFC-32inaf

Page 34 of 38 / IM 985-2Troubleshooting Refrigeration Circuit Air Water Safety Head Suction Compressor Super Temp (Loops) Temp L

IM 985-2 / Page 35 of 38Typical Cooling and Heating Refrigeration CyclesFigure 28: Cooling ModeReturn AirReversing ValveConditioned Air (Cooling)Therm

Page 36 of 38 / IM 985-2Troubleshooting the Water Source Heat Pump UnitFigure 30: Troubleshooting Guide - Unit OperationUnitLow voltage, check power s

IM 985-2 / Page 37 of 38Troubleshooting the MicroTech III Unit Controller DANGER To avoid electrical shock, personal injury or death, be sure that el

©2011 McQuay International • 800.432.1342 • www.mcquay.com IM 985-2 / Page 38 of 38 / (11-11) ®WarrantyAll McQuay equipment is sold p

Page 4 of 38 / IM 985-2Pre-InstallationWARNINGThe installer must determine and follow all applicable codes and regulations. This equipment presents ha

IM 985-2 / Page 5 of 384. Removethetwoscrews(numbered2)inFigure 1 securing thefrontpaneltothesubbaseandremovethepanelbyliftingupa

Page 6 of 38 / IM 985-2Note: Make sure electrical and piping connections are in the proper location within the subbase end piping compartment.7. Rem

IM 985-2 / Page 7 of 38STOP! If an outside air damper kit is to be installed, refer to IM 974 for the manual damper and the motorized damper kit and

Page 8 of 38 / IM 985-2Piping1. Connectunitstosupplyandreturnpipinginatwo-pipereversereturnconguration(Figure 4).  Areversereturnsy

IM 985-2 / Page 9 of 38Water ConnectionsAllpipingconnectionsshouldbemadeusinggoodplumbingpractices and in accordance with any and all local c