Lennox International Inc Dave Lennox Signature Collection XC17 Air Conditioner, 506510-01 Brazing

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BRAZING

CONNECTIONS

1CUT AND DEBUR

Cut ends of the refrigerant lines square (free from nicks or dents) and debur the ends. The pipe must remain round and do not pinch end of the line.

NOTE − Use silver alloy brazing rods with five or six percent minimum silver alloy for copper−to−copper brazing, 45 percent alloy for copper−to−brass and copper−to−steel brazing.

2CAP AND CORE REMOVAL Remove service cap and core from both the vapor and liquid line service ports.

LOW

3

ATTACHED GAUGES

 

 

 

 

A Connect gauge set low pressure side to liquid line service

 

 

 

 

 

 

 

 

valve.

 

 

 

 

 

B Connect gauge set center port to bottle of nitrogen with

 

 

 

 

 

regulator.

ATTACH

 

 

 

 

 

SERVICE PORT MUST BE OPEN TO ALLOW EXIT

GAUGES

 

 

 

 

 

 

 

 

POINT FOR NITROGEN

 

 

 

 

 

 

 

 

VAPOR LINE

 

 

 

 

SERVICE

 

 

 

 

 

 

 

vapor LINE

VALVE

INDOOR

UNIT

LIQUID LINE SERVICEVALVE A

LIQUID LINE

USE REGULATOR TO FLOW

NITROGEN AT 1 TO 2 PSIG.

HIGH

B

OUTDOOR

UNIT

NITROGEN

4WRAP SERVICE VALVETo protect components during

brazing, wrap a wet cloth around the liquid line service valve body and copper tube stub and use another wet cloth underneath the valve body to protect the base paint.

6BRAZE LINE SET

Braze the liquid line to the liquid line service valve. Turn off nitrogen flow.

POINT FLAME AWAY FROM

SERVICE VALVE

5FLOW NITROGEN

Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid line service valve and out of the valve stem port connection on the vapor service valve.

LOW

HIGH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

expansion valve metering device at the

 

 

TO 2 PSIG.

 

NITROGEN

indoor unit will allow low pressure

 

 

 

USE REGULATOR TO

 

 

 

nitrogen to flow through the system.

 

 

 

FLOW NITROGEN AT 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7INSTALL SERVICE PORT CAPS ONLY

After all connections have been brazed, disconnect manifold gauge set from service ports, cool down piping with wet rag and remove all wrappings. Do not reinstall cores until after evacuation procedure. Reinstall service port caps if desired to close off refrigerant ports.

WARNING

rag from the service valve. (TEMPERATURES ABOVE 250ºF

CAN DAMAGE VALVE SEALS

IMPORTANT

line service valve and repeat procedure starting at paragraph 4 for brazing the liquid line to service port valve.

SERVICE PORT

SERVICE PORT CORE

SERVICE PORT CAP

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XC17 SERIES

Image 13
Contents General Table of ContentsShipping and Packing List AIR ConditionerSide View Access View Unit Dimensions − Inches mm and Parts ArrangementModel Number Identification Base with Elongated LegsTypical Unit Parts Arrangement PLUMBING, Switches and Sensor ComponentsControl BOX Using Manifold Gauge SET Operating Gauge Set and Service ValvesOperating Service Valves Torque RequirementsOperating Angle Type Service Valve To Access Service PortOperating Ball Type Service Valve Reinstall Stem CapRecovering Refrigerant from Existing System RecoveringClearance on ALL Sides Minimum Clearance Above Unit New Outdoor Unit PlacementMinimum Clearance Between TWO Units Positioning ConsiderationsStabilizing Unit on Uneven Surfaces Elevating the UnitRoof Mounting Elevated Slab Mounting using Feet Extenders Outside Unit PlacementSlab Mounting at Ground Level Stabilizing Unit on Uneven SurfacesAccess Panel Removal Removing and Installing PanelsAccess and Louvered Louvered Panel InstallationRefrigerant Line SET New or Replacement Line SetLine SET Brazing Flushing the System FlushingUncased Coil Shown Line SET and Indoor Coil 1Equalizer Line Installation Sensing Bulb InstallationFlushing Line SET and Indoor Coil 2 Installing Isolation Grommets Leak Testing the SystemLine SET and Indoor Coil Leak TestEvacuating the System Evacuating2INSTALL Thermostat Size Circuit and Install DisconnectElectrical 24VAC Transformer4ROUTE High Voltage and Ground Wires 3ROUTE Control WiresTypical XC17 Wiring Main Control AGE Main Control Jumpers and TerminalsFAN Main Control Jumpers and TerminalsFlat metal jumper Field Control WiringOn−board link Gauge SET Connections for Testing and ChargingServicing Units Delivered Void of Charge Unit Start−UpIndoor Coil AirflowAction Charge METHOD? Determine by WeighRequirements Calculating System Charge for Outdoor Unit Void of ChargeSubcooling ApproachTest and Charge Method HFC−410A Temperature Fahrenheit Psig Operating and Temperature PressuresSystem Operation Test Pins Function Ambient Sensor Temperature / Resistance Range High Discharge Sensor Temperature / Resistance Range Resetting LED Alert Codes Sensor Temperature / Resistance RangeMain Control LED Alert Codes System LED Alert CodesAlert Status Compressor LED Alert Codes Detected in RUN High Pressure Switch Operation Low Pressure Switch Operation High Discharge Temperature Sensor Operation Verifying Jumper Settings J2 MaintenanceFAN Motor Control and Start UP Verifying LED Status CodesFan Motor Board Unit LED Codes LED Codes and Sequence of OperationsControl Panel Testing for External Power to Fan Control Fan Motor Test Fan Motor Surge Protection Device FAN Motor Surge ProtectionCooling Mode XC17 Start−Up and Performance ChecklistStart UP Checks Subcooling