Low Pressure Switch Operation | Lennox International Inc 506510-01

Figure 20. Low Pressure Switch Operation

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506510−01

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Lennox International Inc 506510-01, Dave Lennox Signature Collection XC17 Air Conditioner Low Pressure Switch Operation

Contents

Table of Contents GeneralShipping and Packing List AIR Conditioner Unit Dimensions − Inches mm and Parts Arrangement Side View Access ViewModel Number Identification Base with Elongated Legs Typical Unit Parts Arrangement PLUMBING, Switches and Sensor ComponentsControl BOX Operating Gauge Set and Service Valves Using Manifold Gauge SETOperating Service Valves Torque Requirements To Access Service Port Operating Angle Type Service ValveOperating Ball Type Service Valve Reinstall Stem Cap Recovering Recovering Refrigerant from Existing System New Outdoor Unit Placement Clearance on ALL Sides Minimum Clearance Above UnitMinimum Clearance Between TWO Units Positioning Considerations Stabilizing 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 Surfaces Removing and Installing Panels Access Panel RemovalAccess and Louvered Louvered Panel Installation New or Replacement Line Set Refrigerant Line SET Line SET Brazing Flushing Flushing the SystemUncased Coil Shown Line SET and Indoor Coil 1 Equalizer Line Installation Sensing Bulb InstallationFlushing Line SET and Indoor Coil 2 Leak Testing the System Installing Isolation Grommets Leak Test Line SET and Indoor Coil Evacuating Evacuating the System Size Circuit and Install Disconnect 2INSTALL ThermostatElectrical 24VAC Transformer 3ROUTE Control Wires 4ROUTE High Voltage and Ground Wires Typical XC17 Wiring Main Control Jumpers and Terminals Main Control AGE Main Control Jumpers and Terminals FAN Field Control Wiring Flat metal jumper On−board link Connections for Testing and Charging Gauge SETServicing Units Delivered Void of Charge Unit Start−Up Indoor Coil AirflowAction Weigh Charge METHOD? Determine byRequirements Calculating System Charge for Outdoor Unit Void of Charge Subcooling ApproachTest and Charge Method Operating and Temperature Pressures HFC−410A Temperature Fahrenheit Psig System 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 Codes Alert 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 Codes LED Codes and Sequence of Operations Fan Motor Board Unit LED Codes Control Panel Testing for External Power to Fan Control Fan Motor Test FAN Motor Surge Protection Fan Motor Surge Protection Device Cooling Mode XC17 Start−Up and Performance ChecklistStart UP Checks Subcooling