Lennox International Inc 506510-01 installation instructions Low Pressure Switch Operation

Page 40

Figure 20. Low Pressure Switch Operation

Page 40

506510−01

Image 40

Contents Table of Contents GeneralShipping and Packing List AIR ConditionerUnit Dimensions − Inches mm and Parts Arrangement Side View Access ViewModel Number Identification Base with Elongated LegsTypical Unit Parts Arrangement PLUMBING, Switches and Sensor ComponentsControl BOX Operating Gauge Set and Service Valves Using Manifold Gauge SETOperating Service Valves Torque RequirementsTo Access Service Port Operating Angle Type Service ValveOperating Ball Type Service Valve Reinstall Stem CapRecovering Recovering Refrigerant from Existing SystemNew Outdoor Unit Placement Clearance on ALL Sides Minimum Clearance Above UnitMinimum Clearance Between TWO Units Positioning ConsiderationsStabilizing Unit on Uneven Surfaces Elevating the UnitRoof Mounting Outside Unit Placement Elevated Slab Mounting using Feet ExtendersSlab Mounting at Ground Level Stabilizing Unit on Uneven SurfacesRemoving and Installing Panels Access Panel RemovalAccess and Louvered Louvered Panel InstallationNew or Replacement Line Set Refrigerant Line SETLine SET Brazing Flushing Flushing the SystemUncased Coil Shown Line SET and Indoor Coil 1Equalizer Line Installation Sensing Bulb InstallationFlushing Line SET and Indoor Coil 2 Leak Testing the System Installing Isolation GrommetsLeak Test Line SET and Indoor CoilEvacuating Evacuating the SystemSize Circuit and Install Disconnect 2INSTALL ThermostatElectrical 24VAC Transformer3ROUTE Control Wires 4ROUTE High Voltage and Ground WiresTypical XC17 Wiring Main Control Jumpers and Terminals Main Control AGEMain Control Jumpers and Terminals FANField Control Wiring Flat metal jumperOn−board link Connections for Testing and Charging Gauge SETServicing Units Delivered Void of Charge Unit Start−UpIndoor Coil AirflowAction Weigh Charge METHOD? Determine byRequirements Calculating System Charge for Outdoor Unit Void of ChargeSubcooling ApproachTest and Charge Method Operating and Temperature Pressures HFC−410A Temperature Fahrenheit PsigSystem Operation Test Pins Function Ambient Sensor Temperature / Resistance Range High Discharge Sensor Temperature / Resistance Range Sensor Temperature / Resistance Range Resetting LED Alert CodesMain Control LED Alert Codes System LED Alert CodesAlert Status Compressor LED Alert Codes Detected in RUN High Pressure Switch Operation Low Pressure Switch Operation High Discharge Temperature Sensor Operation Maintenance Verifying Jumper Settings J2FAN Motor Control and Start UP Verifying LED Status CodesLED Codes and Sequence of Operations Fan Motor Board Unit LED CodesControl Panel Testing for External Power to Fan Control Fan Motor Test FAN Motor Surge Protection Fan Motor Surge Protection DeviceCooling Mode XC17 Start−Up and Performance ChecklistStart UP Checks Subcooling