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Lennox International Inc CONDENSING UNITS, Merit Series 14ACX Units Page, CRANKCASE HEATER HR1

Models: Merit Series 14ACX Units CONDENSING UNITS

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CRANKCASE HEATER (HR1)

HIGH PRESSURE SWITCH (S4)

CRANKCASE THERMOSTAT (S40)

Figure 16. Typical Factory Wiring Diagram (Copeland Compressor)

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506645−01

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Lennox International Inc CONDENSING UNITS Page, CRANKCASE HEATER HR1, HIGH PRESSURE SWITCH S4 CRANKCASE THERMOSTAT S40

Contents

NOTICE TO INSTALLER UNIT PLACEMENTBRAZING LINE SET TO SERVICE VALVES 2P0711Unit Dimensions − Inches mm Typical Unit Parts Arrangement Model Number Identification 14 AC X−024− 230−13Figure 1. Typical Unit Parts Arrangement PageOperating Manifold Gauge Set and Service Valves Operating Angle Type Service Valve Operating Ball Type Service ValveTo Access Service Port Reinstall Stem CapRecovering Refrigerant from Existing System 1DISCONNECT POWERRECOVERING REFRIGERANT Figure 3. Refrigerant Recovery Procedure PageDETAIL B New Unit PlacementDETAIL A REMOVAL Removing and Installing LouversINSTALLATION New or Replacement Line Set must be added, it must be a Polyol ester oilLINE SET INSTALLATIONFigure 8. Line Set Installation Guidelines Page Line Set IsolationBrazing Connections PageFigure 9. Brazing Procedures Page 1CUT AND DEBURWRAP SERVICE VALVES Figure 10. Brazing Procedures continued PageFLOW NITROGEN 6BRAZE LINE SETPage Flushing Line Set and Indoor CoilFigure 11. Removing Metering Device and Flushing Installing Indoor Metering Device Leak Test Line Set and Indoor Coil Figure 13. Leak Test PageEvacuating Line Set and Indoor Coil Figure 14. Evacuating System PageElectrical ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING CRANKCASE HEATER HR1 HIGH PRESSURE SWITCH S4 CRANKCASE THERMOSTAT S40Page SWITCH S5 OR S173 HIGH PRESSURE SWITCHPage THERMAL PROTECTIONGAUGE SET Servicing Units Delivered Void of ChargeUnit Start−Up System RefrigerantAPPROACH OR WEIGH-INSUPERHEAT SUBCOOLINGWEIGH IN RFC AND TXV USE WEIGH-INMETHODUSE WEIGH-INMETHOD Weigh-inor remove refrigerantbased upon line length ABOVE orSUPERHEAT RFC Table 3. HFC−410A Temperature Pressure PsigUSE WEIGH-INMETHOD Weigh-inor remove refrigerantPage Maintenance DEALER System OperationHOMEOWNER Start−Up and Performance Checklist