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Lennox International Inc Merit Series 14ACX Units Page, Thermal Protection, SWITCH S5 OR S173

Models: Merit Series 14ACX Units CONDENSING UNITS

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THERMAL PROTECTION

THERMAL PROTECTION

SWITCH (S5 OR S173)

HIGH PRESSURE SWITCH

(S4)

CRANKCASE HEATER (HR1)

CRANKCASE THERMOSTAT (S40)

Figure 17. Typical Factory Wiring Diagram (Interlink Compressor)

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14ACX SERIES

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Lennox International Inc Merit Series 14ACX Units Page, Thermal Protection, SWITCH S5 OR S173, High Pressure Switch

Contents

UNIT PLACEMENT NOTICE TO INSTALLERBRAZING LINE SET TO SERVICE VALVES 2P0711Unit Dimensions − Inches mm Model Number Identification 14 AC X−024− 230−13 Typical Unit Parts ArrangementFigure 1. Typical Unit Parts Arrangement PageOperating Manifold Gauge Set and Service Valves Operating Ball Type Service Valve Operating Angle Type Service ValveTo Access Service Port Reinstall Stem Cap1DISCONNECT POWER Recovering Refrigerant from Existing SystemRECOVERING REFRIGERANT Figure 3. Refrigerant Recovery Procedure PageNew Unit Placement DETAIL ADETAIL B Removing and Installing Louvers INSTALLATIONREMOVAL must be added, it must be a Polyol ester oil New or Replacement Line SetINSTALLATION LINE SETFigure 8. Line Set Installation Guidelines Page Line Set IsolationPage Brazing Connections1CUT AND DEBUR Figure 9. Brazing Procedures PageFigure 10. Brazing Procedures continued Page WRAP SERVICE VALVESFLOW NITROGEN 6BRAZE LINE SETFlushing Line Set and Indoor Coil Figure 11. Removing Metering Device and FlushingPage Installing Indoor Metering Device Figure 13. Leak Test Page Leak Test Line Set and Indoor CoilFigure 14. Evacuating System Page Evacuating Line Set and Indoor CoilElectrical ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING HIGH PRESSURE SWITCH S4 CRANKCASE THERMOSTAT S40 PageCRANKCASE HEATER HR1 HIGH PRESSURE SWITCH SWITCH S5 OR S173Page THERMAL PROTECTIONServicing Units Delivered Void of Charge GAUGE SETUnit Start−Up System RefrigerantWEIGH-IN APPROACH ORSUPERHEAT SUBCOOLINGUSE WEIGH-INMETHOD WEIGH IN RFC AND TXVWeigh-inor remove refrigerant USE WEIGH-INMETHODbased upon line length ABOVE orTable 3. HFC−410A Temperature Pressure Psig SUPERHEAT RFCUSE WEIGH-INMETHOD Weigh-inor remove refrigerantPage System Operation Maintenance DEALERHOMEOWNER Start−Up and Performance Checklist