Lennox International Inc Comprehensive Guide to Lennox XP17 Heat Pump Wiring and Functionality

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Figure 15. Typical XP17 Wiring

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506586−01 10/10

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Contents General Table of ContentsHeat Pumps Model Number Identification Unit Dimensions −− Inches mmSide View Access View Base with Elongated LegsTypical Unit Parts Arrangement Control BOXOperating Service Valves Using Manifold Gauge SetShipping and Packing List To Access Service Port Operating Angle Type Service ValveOperating Ball Type Service Valve Reinstall Stem CapRecovering Refrigerant Recovering Refrigerant from Existing System1DISCONNECT Power 2CONNECT Manifold Gauge SETUnit Placement Detail a Outside Unit Placement Placement, Slab Mounting and Stabilizing UnitStabilizing Unit on Uneven Surfaces Removing and Installing PanelsRoof Mounting Detail C Louvered Panel InstallationLouvered Panel Removal Detail D Detail aNew or Replacement Line Set Refrigerant Line SETRefrigerant Line SET From Vertical to Horizontal Refrigerant Line SET Alling Horizontal RunsBrazing Connections 1PIPING Panel Removal and Preparing Line SET 2CAP and Core RemovalBraze Line SET Wrap Service ValvesFlow Nitrogen 7PREPARATION for Next StepFlushing Line Set and Indoor Coil Flushing Line Set and Indoor CoilSensing Bulb Installation Installing Indoor Expansion ValveIndoor Expansion Valve Installation Equalizer Line InstallationLeak Test Line Set and Indoor Coil Leak TestEvacuating Line Set and Indoor Coil S S S SElectrical Size Circuit and Install Disconnect2INSTALL Thermostat 24VAC TransformerRoute Control Wires Ting 3A. Route Control Wires Ting4ROUTE High Voltage and Ground Wires Typical XP17 Wiring Heat Pump Control A175 Jumpers and Terminals Heat Pump Control AGEHeat Pump Control A175 Jumper and Terminal Descriptions Field Control Wiring Flat metal jumperFurnace Control Unit Start−Up Connections for Testing and ChargingServicing Units Delivered Void of Charge System RefrigerantAdding or Removing Refrigerant Cooling Mode Indoor Airflow CheckHeating Mode Indoor Airflow Check Airflowindoor CoilUsing HFC−410A Weigh In Method Subcooling Charging MethodAir Handler / Coil Match ups and Targeted Subcooling Values Operating and Temperature Pressures PsigSystem Operations Defrost SystemResistor Location Sensor Temperature / Resistance Range Unit SensorsDefrost Calibration Sequence of Operations YESTest Pin E33 Functions S SLow Pressure S87 Switch Operation Or belowHigh Pressure Switch S4 Sequence of Operation Input Fault or Miswire Degrees Resistance Fahrenheit 136.3 2680 Resetting Fault and Lockout LED Codes System Status, Fault and Lockout LED CodesDS11 and DS14 ATUS, Fault Lockout LED Codes DS15 and DS13 Ault Lockout LED CodesAlert Status Moderate Device225ºF 107ºC Lockout Vice removed or Clears after FAN Motor B4 Test Procedure Field Configuration and TestingTroubleshooting FAN Motor Control A177 OPERATION,Fan Motor Control RPM, LED Code and DC Voltage Output Fan Motor Control Error/Fault LED CodesFan Motor Control Stage LED Indicator Codes Fan Motor Control Flash and Pause DurationsFAN Motor Position Adjustment TOP Grille or FAN Motor Mount Adjustment for FAN ClearanceTOP Grille Adjustment Demand BeginsFAN Motor Control A177 PULSE−WIDTH Modulation PWM Testing for External Power to Fan Motor Control Terminal StripStart FinishMaintenance Snow Guard Top CoverHomeowner SunSource Home Energy System Heating Mode XP17 Start−Up and Performance ChecklistCooling Mode START−UP Checks