Lenox Elite Series, XC14 Flushing Line Set and Indoor Coil, Installing Indoor Expansion Valve

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C Disconnect the equalizer line from the expansion valve equalizer line fitting on the vapor line.
D Remove the vapor line sensing bulb.
E Disconnect the liquid line from the expansion valve at the liquid line assembly.
F Disconnect the expansion valve from the liquid line orifice housing. Take care not to twist or damage distributor tubes during this process.
G Remove and discard expansion valve and the two Teflon® rings.
B Remove any shipping clamps holding the liquid line and distributor assembly.

Flushing Line Set and Indoor Coil

TYPICAL EXISTING FIXED ORIFICE

TYPICAL EXISTING EXPANSION VALVE REMOVAL

REMOVAL PROCEDURE (UNCASED

OR 1BPROCEDURE (UNCASED COIL SHOWN)

1A COIL SHOWN)

 

 

STUB END

 

DISTRIBUTOR TUBES

TWO PIECE PATCH PLATE

LIQUID LINE

EXPANSION

(UNCASED COIL ONLY)

 

ORIFICE

VALVE

LIQUID LINE ORIFICE HOUSING

 

DISTRIBUTOR

HOUSING

 

 

 

 

TEFLON® RING

TUBES

 

TEFLON®

 

 

RING

FIXED ORIFICE

 

 

 

BRASS NUT

DISTRIBUTOR ASSEMBLY

REMOVE AND DISCARD

WHITE TEFLON® SEAL

(IF PRESENT) LIQUID LINE ASSEMBLY (INCLUDES STRAINER)

AOn fully cased coils, remove the coil access and plumbing panels.

BRemove any shipping clamps holding the liquid line and distributor as- sembly.

CUsing two wrenches, disconnect liquid line from liquid line orifice hous- ing. Take care not to twist or damage distributor tubes during this pro- cess.

TEFLON®

RINGSENSING

LINE

DISTRIBUTOR EQUALIZER

ASSEMBLY LINE

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

MALE EQUALIZER

 

 

LINE FITTING

VAPOR

 

 

LIQUID

SENSING BULB

LINE

LINE

 

 

 

D Remove and discard fixed orifice, valve stem assembly if present and A On fully cased coils, remove the coil access and plumbing panels. Teflon® washer as illustrated above.

E Use a field−provided fitting to temporary reconnect the liquid line to the indoor unit’s liquid line orifice housing.

2CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE

INVERTED HCFC−22

GAUGE

CYLINDER CONTAINS

MANIFOLD

CLEAN HCFC−22 TO BE

 

A USED FOR FLUSHING.

 

1

LOW

HIGH

VAPOR LINE

NEW

SERVICE VALVE

OUTDOOR

 

UNIT

OPENED CLOSED

EXISTING

INDOOR

UNITB

LIQUID LINE SERVICE

VALVE

RECOVERY

 

CYLINDER

TANK

 

RETURN

 

VAPOR LIQUID

C

DISCHARGE

D

 

 

INLET

 

 

 

 

 

 

RECOVERY MACHINE

HUse a field−provided fitting to temporary reconnect the liquid line to the indoor unit’s liquid line orifice housing.

3FLUSHING LINE SET

The line set and indoor unit coil must be flushed with at least the same amount of clean refrigerant that previously charged the system. Check the charge in the flushing cylinder before proceeding.

ASet the recovery machine for liquid recovery and start the recovery machine. Open the gauge set valves to allow the recovery machine to pull a vacuum on the existing system line set and indoor unit coil.

BInvert the cylinder of clean HCFC−22 and open its valve to allow liquid refrigerant to flow into the system through the vapor line valve. Allow the refrigerant to pass from the cylinder and through the line set and the indoor unit coil before it enters the recovery machine.

AInverted HCFC−22 cylinder with clean refrigerant to the vapor service valve.

BHCFC−22 gauge set (low side) to the liquid line valve.

CHCFC−22 gauge set center port to inlet on the recovery machine with an empty recovery tank to the gauge set.

DConnect recovery tank to recovery machines per machine instructions.

CAfter all of the liquid refrigerant has been recovered, switch the recovery machine to vapor recovery so that all of the HCFC−22 vapor is recovered. Allow the recovery machine to pull down to 0 the system.

DClose the valve on the inverted HCFC−22 drum and the gauge set valves. Pump the remaining refrigerant out of the recovery machine and turn the machine off.

Figure 10. Installing Indoor Expansion Valve

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XC14 SERIES

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Contents AIR Conditioner Table of ContentsGeneral Shipping and Packing ListUnit Dimensions − Inches mm Model Number Identification230 Plumbing and Switches Components Typical Unit Parts ArrangementControl Panel Torque Requirements Operating Gauge Set and Service ValvesUsing Manifold Gauge SET Operating Service ValvesReinstall Stem Cap Operating Angle Type Service ValveOperating Ball Type Service Valve To Access Service Port2CONNECT Manifold Gauge SET Recovering Refrigerant from Existing System1DISCONNECT Power Recovering RefrigerantPlacing Unit on Slab Unit PlacementClearance on ALL Sides Positioning ConsiderationsDetail E Deck Top Mounting Detail a Outside Unit PlacementDetail C Elevated Slab Mounting using Feet Extenders Detail D Slab Side MountingLouvered Panel Removal Removing and Installing PanelsLouvered Panel Installation Roof MountingNew or Replacement Line Set Refrigerant Line SETRefrigerant Line Set Refrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 1CUT and Debur Brazing Procedures7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen 6BRAZE Line SETFlushing Line Set and Indoor Coil Installing Indoor Expansion ValveEqualizer Line Installation Installing Indoor Metering DeviceIndoor Expansion Valve Installation Sensing Bulb InstallationLeak Test Leak Test Line Set and Indoor CoilEvacuating System Evacuating Line Set and Indoor Coil24VAC Transformer Size Circuit and Install Disconnect2INSTALL Thermostat ElectricalVAC Control Wiring Diagrams Field Installed Typical Factory Wiring Diagram Interlink Compressor Typical Unit Wiring Diagram System Refrigerant Connections for Testing and ChargingServicing Units Delivered Void of Charge Unit Start−UpDevice? Determining Charge MethodWhich indoor MeteringCalculating System Charge for Outdoor Unit Void of Charge Checking AIR Flow AT Indoor CoilBelow AboveSHº Superheat Values +/−5ºF 40ºFSystem Operation Normal Operating Pressures Liquid +10 and Suction +5 psigUnit Components Unit Nameplate Actual MaintenanceIndoor Unit Indoor CoilState Start−Up and Performance ChecklistInstaller City Job Name Job no Date Job Location City

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