Lennox Dave Lennox Signature Collection XC15

06/08 506044−01
*2P0608* *P506044-01*
Page 1
E2008 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause personal injury,
loss of life, or damage to property.
Installation and service must be performed by a
licensed professional installer (or equivalent) or a
service agency.
CAUTION
Physical contact with metal edges and corners
while applying excessive force or rapid motion can
result in personal injury. Be aware of, and use
caution when working near these areas during
installation or while servicing this equipment.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox Engineering Handbook. Coils
previously charged with HCFC−22 must be
flushed.
IMPORTANT
The Clean Air Act of 1990 bans the intentional
venting of refrigerant (CFCs, HCFCs AND HFCs) as
of July 1, 1992. Approved methods of recovery,
recycling or reclaiming must be followed. Fines
and/or incarceration may be levied for
noncompliance.
INSTALLATION
INSTRUCTIONS
Dave Lennox Signature
®
Collection XC15 Units
AIR CONDITIONER
506044−01
06/08
Supersedes 04/08
Table of Contents
Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . .
XC15 Outdoor Unit 3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions and Parts Arrangement 2. . . . . . . . .
General Information 3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Recovering Refrigerant from Existing System 5. . . . .
Removing Existing Outdoor Unit 5. . . . . . . . . . . . . . . . .
Positioning New Outdoor Unit 5. . . . . . . . . . . . . . . . . . .
Removing and Installing Panels 7. . . . . . . . . . . . . . . . .
New or Replacement Line Set 8. . . . . . . . . . . . . . . . . . .
Brazing Line Set Connections 9. . . . . . . . . . . . . . . . . . .
Removing Indoor Unit Metering Device 11. . . . . . . . . . .
Flushing System 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing New Indoor Unit Metering Device 13. . . . . . . .
Testing for Leaks 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuating the System 15. . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge 15. . . . . . . . . . .
Electrical Connection 15. . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up and Charging Procedures 16. . . . . . . . . . . . . . .
System Operation 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lennox System Operation Monitor (LSOM) 20. . . . . . .
Maintenance 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sound Reduction Cover and Assembly Procedure 23. .
Homeowner Information 23. . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 24. . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up and Performance Checklist 24. . . . . . . . . . . . .
Shipping and Packing List
Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1  Assembled outdoor unit.
1  Bag Assembly
S 1  Bushing (for low voltage wiring
S 2  Isolation grommets for liquid and suction
lines.
ISOLATION GROMMETS (2)
BUSHING (1)
Figure 1. Bag Assembly (Parts)
Litho U.S.A.

Lennox Dave Lennox Signature Collection XC15 Specifications

General

Brand	Lennox
Model	Dave Lennox Signature Collection XC15
Category	Air Conditioner
Language	English

Summary

Unit Dimensions and Parts Arrangement

XC15 Parts Arrangement

Detailed layout of internal components of the outdoor unit.

Recovering Refrigerant from Existing System

Refrigerant Recovery Method 1

Procedure for refrigerant recovery when the unit lacks manual shut-off valves.

Refrigerant Recovery Method 2

Procedure for refrigerant recovery using manual shut-off valves.

Removing and Installing Panels

Installing Isolation Grommets

Guidance on fitting isolation grommets to refrigerant lines for vibration dampening.

Removing Louvered Panels

Step-by-step instructions for safely removing and reinstalling louvered access panels.

New or Replacement Line Set

Refrigerant Line Set Overview

Information on field refrigerant piping, including line set types and isolation.

Matching Indoor Coil and Line Set

Guidelines for matching the outdoor unit with indoor coils and line sets.

Brazing Line Set Connections

Procedures for making secure and leak-free brazed connections for refrigerant lines.

Removing Indoor Unit Metering Device

Fixed Orifice Removal Procedure

Steps to remove a fixed orifice metering device from an indoor coil.

TXV Removal Procedure

Steps to remove a TXV (Thermostatic Expansion Valve) metering device.

Flushing the System

Flushing System Required Equipment

Lists necessary tools and materials for flushing the system, including recovery bottles and gauge sets.

Flushing System Procedure

Step-by-step instructions for flushing the system to remove contaminants and moisture.

Installing New Indoor Unit Metering Device

TXV Installation Procedure

Detailed steps for installing a TXV metering device in the indoor coil.

Testing for Leaks

Leak Testing Procedure

Steps to connect gauges, pressurize with nitrogen, and check for leaks using a detector.

Evacuating the System

Servicing Units Void of Charge

Procedure for servicing units that are initially empty of refrigerant.

Electrical Connections

Guidelines for making electrical connections according to local codes and NEC.

Start-Up and Charging Procedures

Setting Up for Charge Check

Steps to prepare the system for checking refrigerant charge using gauge sets.

Indoor Coil Airflow Check

Method for checking indoor coil airflow using the Delta-T process.

Determining Charge Method

Guidance on selecting the correct refrigerant charging method.

System Operation

High Pressure Switch Operation

Description of the high-pressure safety switch and its function.

Low Pressure Switch Operation

Description of the low-pressure safety switch and its operation.

Lennox System Operation Monitor (LSOM)

LSOM LED Functions

Explanation of the LED indicators and their meanings for system diagnostics.

LSOM Terminal Connections

Details on the purpose and connection of various terminals on the LSOM module.

Maintenance

Indoor Unit Maintenance

Maintenance tasks for the indoor unit, including filter cleaning and blower checks.

Outdoor Unit Maintenance

Maintenance for the outdoor unit, focusing on coil cleaning and airflow.

Thermostat Operation

Preservice Check

Pre-service checks to perform before calling for maintenance or troubleshooting.

XC15 Start-Up and Performance Checklist

Start-Up Checks

Sections for recording initial system checks like refrigerant type and load amps.

Cooling Mode Parameters

Sections for recording cooling mode parameters like pressures and temperatures.