Lennox International Inc 506586-01 installation instructions Flushing Line Set and Indoor Coil

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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

CHECK

(UNCASED COIL ONLY)

 

ORIFICE

EXPANSION

LIQUID LINE ORIFICE HOUSING

 

DISTRIBUTOR

HOUSING

VALVE

 

 

 

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

 

 

 

DRemove and discard fixed orifice, valve stem assembly if present and Teflon® washer as illustrated above.

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

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

BRemove any shipping clamps holding the liquid line and distributor assembly.

CDisconnect the equalizer line from the check expansion valve equalizer line fitting on the vapor line.

2CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE

DRemove the vapor line sensing bulb.

EDisconnect the liquid line from the check expansion valve at the liquid line assembly.

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

 

 

 

TANK

 

 

 

RETURN

 

VAPOR LIQUID

C

DISCHARGE

D

 

 

INLET

RECOVERY

 

 

 

CYLINDER

 

 

 

 

 

 

RECOVERY MACHINE

FDisconnect the check expansion valve from the liquid line orifice housing. Take care not to twist or damage distributor tubes during this process.

GRemove and discard check expansion valve and the two Teflon® rings.

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 11. Flushing Line Set and Indoor Coil

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506586−01 10/10

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Contents General Table of ContentsHeat Pumps Unit Dimensions −− Inches mm Side View Access ViewModel Number Identification Base with Elongated LegsTypical Unit Parts Arrangement Control BOXOperating Service Valves Using Manifold Gauge SetShipping and Packing List Operating Angle Type Service Valve Operating Ball Type Service ValveTo Access Service Port Reinstall Stem CapRecovering Refrigerant from Existing System 1DISCONNECT PowerRecovering Refrigerant 2CONNECT Manifold Gauge SETUnit Placement Detail a Outside Unit Placement Placement, Slab Mounting and Stabilizing UnitStabilizing Unit on Uneven Surfaces Removing and Installing PanelsRoof Mounting Louvered Panel Installation Louvered Panel RemovalDetail C Detail D Detail aNew or Replacement Line Set Refrigerant Line SETRefrigerant Line SET From Vertical to Horizontal Refrigerant Line SET Alling Horizontal RunsBrazing Connections 1PIPING Panel Removal and Preparing Line SET 2CAP and Core RemovalWrap Service Valves Flow NitrogenBraze Line SET 7PREPARATION for Next StepFlushing Line Set and Indoor Coil Flushing Line Set and Indoor CoilInstalling Indoor Expansion Valve Indoor Expansion Valve InstallationSensing Bulb Installation Equalizer Line InstallationLeak Test Line Set and Indoor Coil Leak TestEvacuating Line Set and Indoor Coil S S S SSize Circuit and Install Disconnect 2INSTALL ThermostatElectrical 24VAC TransformerRoute Control Wires Ting 3A. Route Control Wires Ting4ROUTE High Voltage and Ground Wires Typical XP17 Wiring Heat Pump Control A175 Jumpers and Terminals Heat Pump Control AGEHeat Pump Control A175 Jumper and Terminal Descriptions Field Control Wiring Flat metal jumperFurnace Control Connections for Testing and Charging Servicing Units Delivered Void of ChargeUnit Start−Up System RefrigerantCooling Mode Indoor Airflow Check Heating Mode Indoor Airflow CheckAdding or Removing Refrigerant Airflowindoor CoilUsing HFC−410A Weigh In Method Subcooling Charging MethodAir Handler / Coil Match ups and Targeted Subcooling Values Operating and Temperature Pressures PsigSystem Operations Defrost SystemResistor Location Sensor Temperature / Resistance Range Unit SensorsDefrost Calibration Sequence of Operations YESTest Pin E33 Functions S SLow Pressure S87 Switch Operation Or belowHigh Pressure Switch S4 Sequence of Operation Input Fault or Miswire Degrees Resistance Fahrenheit 136.3 2680 System Status, Fault and Lockout LED Codes DS11 and DS14 ATUS, Fault Lockout LED CodesResetting Fault and Lockout LED Codes DS15 and DS13 Ault Lockout LED CodesAlert Status Moderate Device225ºF 107ºC Lockout Vice removed or Clears after Field Configuration and Testing TroubleshootingFAN Motor B4 Test Procedure FAN Motor Control A177 OPERATION,Fan Motor Control Error/Fault LED Codes Fan Motor Control Stage LED Indicator CodesFan Motor Control RPM, LED Code and DC Voltage Output Fan Motor Control Flash and Pause DurationsTOP Grille or FAN Motor Mount Adjustment for FAN Clearance TOP Grille AdjustmentFAN Motor Position Adjustment Demand BeginsFAN Motor Control A177 PULSE−WIDTH Modulation PWM Testing for External Power to Fan Motor Control Strip StartTerminal FinishMaintenance Snow Guard Top CoverHomeowner SunSource Home Energy System XP17 Start−Up and Performance Checklist Cooling ModeHeating Mode START−UP Checks