Lennox Merit Series 13ACX - User Manual

09/08 506081−01
*2P0908* *P506081-01*
Page 1
2008 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
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.
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.
INSTALLATION
INSTRUCTIONS
Merit
®
Series 13ACX Units
AIR CONDITIONER
506081−01
09/08
Supersedes 07/08
Table of Contents
Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . . . .
13ACX Air Conditioners 1. . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recovering Refrigerant from Existing System 4. . . . . . .
Removing Existing Outdoor Unit 5. . . . . . . . . . . . . . . . . . .
Positioning New Outdoor Unit 5. . . . . . . . . . . . . . . . . . . . .
New or Replacement Line Set 6. . . . . . . . . . . . . . . . . . . . .
Brazing Connections 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Indoor Unit Metering Device 9. . . . . . . . . . . .
Flushing the System 10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing New Indoor Unit Metering Device 11. . . . . . . . .
Testing for Leaks 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuating the System 13. . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge 14. . . . . . . . . . .
Electrical Connections 14. . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up and Charging Procedures 15. . . . . . . . . . . . . . . .
System Operation 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Homeowner Information 22. . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 23. . . . . . . . . . . . . . . . . . . . . . . . . . .
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  Refrigerant flow control kit (Fixed Orifice)
1  Liquid line filter drier
13ACX Air Conditioners
13ACX Air Conditioners, which will also be referred to in
this instruction as the outdoor unit, uses HFC−410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the Lennox
13ACX Engineering Handbook.
This outdoor unit is designed for use in systems that use
one of the following refrigerant metering devices:
 Thermal expansion valve (TXV)
 Fixed orifice
Litho U.S.A.

Lennox Merit Series 13ACX Specifications