McQuay MHW Geothermal Ran Installation Manual

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

Page 10 of 36 / IM 985Motorized Isolation Valve & RelayThe motorized valve kit is available as a factory-installed andwiredoptionormaybeorde

IM 985 / Page 11 of 36Cleaning & Flushing Water SystemPrior to first operation of any unit, the water circulating system must be cleaned and flush

Page 12 of 36 / IM 985Electrical ConnectionsNote: Installation and maintenance must be performed only by qualified personnel who are familia

IM 985 / Page 13 of 36 Standard Range Geothermal Range Units Units Cooling Heating Cooling Heating Min. Entering. Water  55°F/13°C 5

Page 14 of 36 / IM 985Figure 11. I/O Expansion Module Conguration Jumper Terminals Adding an I/O Expansion Module (with an interconnect cable) to the

IM 985 / Page 15 of 36MicroTech III Unit Controller with LonWorks Communication Module orchestrates the following unit operations: Enable heating an

Page 16 of 36 / IM 985MicroTech III Controller with BACnet Communication ModuleFor installation and operation information on MicroTech III unit contr

IM 985 / Page 17 of 36MicroTech® III Unit Controller Terminals Locations and Descriptions H1 - 1 24 24 VAC Power Input H1 - 2 C 24 VAC Common H

Page 18 of 36 / IM 985Figure 14. MicroTech III Unit Controller Terminal LocationsLocation of Conguration Jumpers on the MicroTech III Unit Controller

IM 985 / Page 19 of 36Figure 15. LonWorks Communication Module Placement on MicroTech III Unit Controller

Page 2 of 36 / IM 985Model NomenclatureNOTE: For illustration purposes only. Not all options available with all models.Please consult McQuay Sales Rep

Page 20 of 36 / IM 985Typical Wiring DiagramsUnit-Mounted – With MicroTech III Unit Controller for Sizes 007-015 – 208/230/60Hz/1-PhaseNotes:1. Main

IM 985 / Page 21 of 36Notes:1. Main board jumpers: No jumpers shorted. All open.2. I/O Expansion board jumpers: Jumper JP4 shorted. Transformer:

Page 22 of 36 / IM 985Notes:1. Main board jumpers: Short JP2 cycling fan operation Short JP6 for Comm Module controlDrawing No. 668814815Note: Wiri

IM 985 / Page 23 of 36Start-upCooling or Heating – Manual Operation The Microtech III unit controller has built-in features such as random start, comp

Page 24 of 36 / IM 985Up buttonDown buttonRight (fan) buttonLeft (system) buttonRC/RH JumperField programming pinsConguration switchReset switchSpeci

IM 985 / Page 25 of 36Programmable Electronic Thermostat (P/N 668811101)7-Day Programmable, Auto Changeover, Fan Speed Control, Hardwired• 7-Day Prog

Page 26 of 36 / IM 985Wireless Temperature Control (T9000)The T9000 Wireless Temperature Control is designed to provide precision temperature control

IM 985 / Page 27 of 36Wiring Sensors to the MicroTech III Unit ControllerFigure 21. Temperature Sensor Wiring to MicroTech III Unit Controller (668900

Page 28 of 36 / IM 985Note: Connectors on valve must be cut off and stripped back and the wires twisted to make connections to the IV/PR

IM 985 / Page 29 of 36 CAUTIONCold Weather Operation Console water source heat pumps may experienceerratic operation during cold ambient condition

IM 985 / Page 3 of 36Pre-Installation1. To prevent damage, do not operate this equipment for supplementary heating and cooling during the constructio

Page 30 of 36 / IM 985Troubleshooting The in and outs of R-410AR-410A is a non-ozone depleting blend of two refrigerants-HFC-125andHFC-32inaft

IM 985 / Page 31 of 36Figure 26. Cooling ModeReturn AirReversing ValveConditioned Air (Cooling)Thermal Expansion ValveCoaxial Heat ExchangerBlowerCoil

Page 32 of 36 / IM 985UnitLow voltage, check power supply voltageFuse may be blown, circuit breaker is openWire may be loose or broken. Replace or tig

IM 985 / Page 33 of 36Troubleshooting the MicroTech III Unit ControllerGeneral Use and InformationThe Microtech III unit controller is provided with t

©2009 McQuay International • 800.432.1342 • www.mcquay.com IM 985 / Page 36 of 36 / (4-09) ®WarrantyAll McQuay equipment is sold

Page 4 of 36 / IM 985Note: If using the Alternate Unit Installation procedure (Using Mounting Brackets, page 6) it is not necessary to remove the top

IM 985 / Page 5 of 36Figure 2. Unit Mounting Details7. Removethelterandlocatetheexisting1/4"mounting holes in the bottom of the subbase

Page 6 of 36 / IM 985Note: Use the appropriate fasteners by others in accordance with local building codes.STOP! If an outside air damper kit is to

IM 985 / Page 7 of 36Note: Be sure that one end of the hose has a swivel tting to facilitate removal for service. Hard piping to the unit can result

Page 8 of 36 / IM 9858. Units are internally trapped. Copper or PVC condensate lines can be used. A means of disconnection must be furnished to facil

IM 985 / Page 9 of 36Adding Motorized & Valve AssembliesAllconsolewatersourceheatpumpscanbeeldinstalled with a motorized valve. All valv