Lennox International Inc Merit Series 14ACX Units Single Phase High Voltage / Ground Wires

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ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING

SINGLE PHASE

HIGH VOLTAGE / GROUND WIRES

Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. Connect conduit to the control panel using a proper conduit fitting.

LOW VOLTAGE CONTROL WIRING

NOTE

maintain separation of field installed low and high voltage circuits.

NOTE

gauge per table above.

NOTE Do not bundle any excess 24VAC control wires inside control panel.

HIGH VOLTAGE CONNECTIONS (CONTACTOR)

GROUND

HIGH VOLTAGE FIELD WIRING

LOW VOLTAGE FIELD WIRING

FACTORY

WIRING

THERMOSTAT

B

CONTROL

WIRING

HIGH VOLTAGE

FLEXIBLE

CONDUIT

INDOOR UNIT

Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated.

ARun 24VAC control wires through hole with grommet and secure with provided wire tie.

BMake 24VAC thermostat wire connections. Locate the two wires from the contactor and make connection using field provided wire nuts:

S Yellow to Y1

S Black to C (common)

WIRE RUN LENGTH

AWG# INSULATION TYPE

LESS THAN 100’ (30 METERS)

18

TEMPERATURE RATING

MORE THAN 100’ (30 METERS)

16

35ºC MINIMUM.

R

W1

Y

G

C

POWER

HEAT

COOLING

INDOOR BLOWER

COMMON

R

W

Y

G

C

A

GROMMET AND

WIRE TIE

OUTDOOR

YELLOW UNIT

Y1

BLACK

C

Figure 15. Typical Field Wiring Diagram

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14ACX SERIES

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Contents Condensing Units Table of ContentsShipping and Packing List GeneralSide View Unit Dimensions − Inches mmModel Number Identification AC X −024 − 230 −13 Typical Unit Parts ArrangementTorque Requirements Operating Manifold Gauge Set and Service ValvesUsing Manifold Gauge SET Operating Service Valves11 12 98 7 6 2CONNECT Manifold Gauge SET Recovering Refrigerant from Existing System1DISCONNECT Power Recovering RefrigerantPositioning Considerations New Unit PlacementClearance on ALL Sides Minimum Clearance Above Unit Minimum Clearance Between TWO UnitsStep Removing and Installing LouversPlacing Unit on Slab Roof MountingMineral oils are not compatible with HFC−410A. If oil New or Replacement Line SetRefrigerant Line SET From Vertical to Horizontal InstallationRefrigerant Line SET Alling Vertical Runs NEW Construction ShownBrazing Connections 1CUT and Debur Brazing Procedures7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen 6BRAZE Line SETFlushing Line Set and Indoor Coil 2CONNECT Gauges and Equipment for Flushing ProcedureEqualizer Line Installation Installing Indoor Metering DeviceIndoor Expansion Valve Installation Sensing Bulb InstallationLeak detector must be capable of sensing HFC refrigerant Leak Test Line Set and Indoor CoilConnect Gauge SET Evacuating Line Set and Indoor Coil24VAC Transformer ElectricalLOW Voltage Control Wiring Single Phase High Voltage / Ground WiresTypical Factory Wiring Diagram Copeland Compressor Typical Factory Wiring Diagram Interlink Compressor System Refrigerant Connections for Testing and ChargingServicing Units Delivered Void of Charge Unit Start−UpStart Determine how refrigerant is metered Checking AIR Flow AT Indoor CoilBelow Calculating System Charge for Outdoor Unit Void of ChargeHFC−410A Subcooling TXV Charge Superheat RFC Start Measure outdoor ambient temperatureProblem exists with some component in the system System Operation MaintenanceUnit Components Homeowner Start−Up and Performance Checklist