Manuals / Lennox International Inc / Household Appliance / Heat Pump

Lennox International Inc 4HP18LT manual L - Liquid S- Suction, Issue, Page, 506470-01

Models: 4HP18LT

1 28

Page 17

L - Liquid S- Suction

Values provided above are typical pressures. Indoor unit matchup, indoor air quality equipment, and indoor load will case pressures to vary.

Table 8

506470-01

Issue 1007

Page 17

Image 17

Lennox International Inc 4HP18LT manual L - Liquid S- Suction, Issue, Page, 506470-01

Contents

TABLE OF CONTENTS INSTALLATION AND MAINTENANCE INSTRUCTIONSINSTALLATION CONNECTION DIAGRAMFastener Installation ClearancesTorque Stem CapsSlab Mounting Electrical WiringSlab Mounting Roof MountingRefrigerant Piping Installing Refrigerant LineLiquid Line Line Set Length and Size BTUH Install unit away from windows12 ft. 25 ft. 50 ft. 75 ft. 100 ft S uction Line Line S et Length and S ize B T UHFloor Joist or Roof Rafter Tape or Wire Tie 8’ Wire Tie around vapor line onlyFloor Joist or Roof Rafter Tape or Wire Tie Refrigerant Line Sets Installing Horizontal RunsHeavy Nylon Flushing Connections Flushing ProcedureFlushing Existing Line Set and Indoor Coil Required Euipment4HP18LT- 24 H4TXV01 4HP18LT - 36 H4TXV02 MODEL4HP18LT - 48, -60H4TXV03 Refrigerant Metering DeviceSuction Line Ball Type Service Valve Liquid and Suction Line Service ValvesLeak Testing Manifold Gauge SetEvacuation Using an Electronic Leak Detector4.Open both manifold valves and start vacuum pump Refrigerant Charging Refrigerant Charge AdjustmentSTART-UP Low pressure gauge to suction line service valve Subcooling Values Table R410A Temperature/Pressure ChartApproach Values for TXV Systems Table L - Liquid S- Suction IssuePage 506470-01Crankcase Heater Filter DrierEmergency Heat Function Room Thermostat Defrost SystemPressure Switch Circuit Defrost Control Timing PinsDiagnostic LEDs Defrost Control Board Diagnostic LEDs TableInterpreting the Diagnostic LEDs System Diagnostic ModuleFlash Codes LED DescriptionFlash Codes cont 24VAC Power WiringMiswired Module Codes Miswired Module TroubleshootingThermostat Demand Wiring MAINTENANCE In case of extended power outage Inspect and clean outdoor coilTemperature Setting Levers HOMEOWNER INFORMATIONSystem Switch Fan SwitchTemperature Indicator Preservice CheckCooling Start-Upand Performance ChecklistHeating Sequence of OperationIssue Wire Diagram48630-001 Page506470-01 IssuePage