McQuay LIA265-1 Specifications

Installation & Maintenance Data Group: WSHP Part Number: 910109005 Date: April 2010IM 1059-1 ©2010 McQuay Internatio

Page 10 of 36 / IM 1059-1Piping1. All units should be connected to supply and return pipinginatwo-pipereversereturnconguration.A reverse retu

IM 1059-1 / Page 11 of 36Cleaning & Flushing System1. Priortorstoperationofanyconditioner,thewatercirculatingsystemmustbecleanedan

Page 12 of 36 / IM 1059-110.Donotlubricatethefanmotorduringtherstyearof operation as it is prelubricated at the factory.11. Field supplied

IM 1059-1 / Page 13 of 36Electrical DataGeneral1. Verify the compatibility between the voltage and phase of the available power and that shown on the

Page 14 of 36 / IM 1059-1 Control Description Application ProtocolThe MicroTech III controller is a stand-alone microprocessor-based control boar

IM 1059-1 / Page 15 of 36The MicroTech III Controller is a microprocessor-based control board conveniently located in the unit control box for easy

Page 16 of 36 / IM 1059-1Figure 17: I/O Expansion Module Conguration Jumper TerminalsI/O Expansion ModuleThe I/O Expansion Module is factory-installe

IM 1059-1 / Page 17 of 36MicroTech III Controller with Communication Modules FeaturesThe MicroTech III Controller with LonWorks or BACnet Communicatio

Page 18 of 36 / IM 1059-1 Jumper Description Options JP1 Mode Open for normal operation mode Shorted for service/test operation

IM 1059-1 / Page 19 of 36Figure 18: MicroTech® III Controller DiagramFigure 19: Location of Conguration Jumpers on the MicroTech III ControllerNote

Page 2 of 36 / IM 1059-1Table of Contents Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . 2 Vertical Unit LVC-LVW . . . . . . .

Page 20 of 36 / IM 1059-1Figure 20: LonWorks® Communication Module Placement on MicroTech® III Controller

IM 1059-1 / Page 21 of 36Figure 21: MicroTech® III Controller with I/O Expansion Module & Communication Module 208/230, 460, 575-60-3 (1.5 hp or

Page 22 of 36 / IM 1059-1Typical Wiring DiagramsFigure 22: MicroTech® III Controller with I/O Expansion Module & Communication Module208/230, 460

IM 1059-1 / Page 23 of 36Typical Wiring DiagramFigure 23: MicroTech® III Controller with I/O Expansion Module & Communication Module208/230, 460,

Page 24 of 36 / IM 1059-14. Install two strand shielded wire between remote sensor and thermostat. Shielded wire must be used.Do not run remote sens

IM 1059-1 / Page 25 of 36Figure 30: Temperature Sensor Wiring to MicroTech III Unit Controller (669529001)2-Way Motorized Isolation ValveFigure 31:

Page 26 of 36 / IM 1059-1Figure 34: 2-Way Motorized Valve Wiring DetailsFigure 33: 2-Way Motorized Valve Wiring to MicroTech III Controller

IM 1059-1 / Page 27 of 36Figure 36: Multiple Unit Control Panel and BoardThe multiple unit control board provides the components necessary to protect

Page 28 of 36 / IM 1059-1Troubleshooting The in and outs of R-410AR-410A is a non-ozone depleting blend of two refrigerants -HFC-125andHFC-32ina

IM 1059-1 / Page 29 of 36Table 17: Troubleshooting Refrigeration CircuitCharge Undercharge System Low Low Low High Low Low Low Low Pressure

IM 1059-1 / Page 3 of 36IMPORTANTThis product was carefully packed and thoroughly inspected before leaving the factory. Responsibility for its safe de

Page 30 of 36 / IM 1059-1Typical Cooling Refrigeration Cycle – Dual CompressorsNote: Typical temperature readings are at full load conditions at ISO-1

IM 1059-1 / Page 31 of 36Typical Heating Refrigeration Cycle – Dual CompressorsNote: Typical temperature readings are at full load conditions at ISO-1

Page 32 of 36 / IM 1059-1UnitLow voltage, check power supply voltageFuse may be blown, circuit breaker is openWire may be loose or broken. Replace or

IM 1059-1 / Page 33 of 36Troubleshooting the MicroTech III ControllerGeneral Use and InformationThe Microtech III controller is provided with two driv

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©2010 McQuay International • www.mcquay.com • 800.432.1342 IM 1059-1 Page 36 of 36 WarrantyAll McQuay equipment is sold pursuant t

Page 4 of 36 / IM 1059-1Unit LocationLarge Vertical Water Source Heat Pump units are easily locatedinequipmentroomsoroor-by-oorinstallations.T

IM 1059-1 / Page 5 of 36Vibration IsolatorsFor minimum sound and vibration transmission, it is rec-ommended that the unit be mounted on vibration isol

Page 6 of 36 / IM 1059-15. Todeterminethedeectiondistancefromnormalposition, use a straightedge or stretch a cord from sheave to sheave to us

IM 1059-1 / Page 7 of 36Flexible ConnectorFlexible ConnectorFlexible ConnectorNote 2Note 2Note 2Note 1Note 1Note 1Fan Rotation(See Note 3)Transformati

Page 8 of 36 / IM 1059-1Figure 10: 2" Return Air Duct Collar and Filter Rack Dimensions Unit Sizes 072-120*2⅛"6"Optional 2" Filter

IM 1059-1 / Page 9 of 36ChassisCenter SupportsTop Duct CollarTop Filter RackCenter Filter RacksDuct Collar SideDoor EndDuct Collar Center SupportFigur