Lennox International Inc. CONDENSING UNITS Manuale Utente
07/11
506645−01
*2P0711*
*P506645-01*
Page 1
2011 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
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.
professional installer (or equivalent) or a service agency.
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.
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.
specified in Lennox Engineering Handbook. Coils
previously charged with HCFC−22 must be flushed.
NOTICE TO INSTALLER
UNIT PLACEMENT
It is critical for proper unit operation to place outdoor unit on an
elevated surface as described in Unit Placement section on page 7.
elevated surface as described in Unit Placement section on page 7.
BRAZING LINE SET TO SERVICE VALVES
It is imperative to follow the brazing technique illustrated starting on
page 11 to avoid damaging the service valve’s internal seals.
page 11 to avoid damaging the service valve’s internal seals.
INSTALLATION
INSTRUCTIONS
INSTRUCTIONS
Merit
®
Series 14ACX
Units
CONDENSING UNITS
506645−01
07/11
Supersedes 11/10
07/11
Supersedes 11/10
TABLE OF CONTENTS
Shipping and Packing List
Shipping and Packing List
. . . . . . . . . . . . . . . . . . . . . . . .
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Unit Parts Arrangement
. . . . . . . . . . . . . . . . . . .
Model Number Identification
3
. . . . . . . . . . . . . . . . . . . . . .
Operating Manifold Gauge Set and Service Valves
. . .
Recovering Refrigerant from Existing System
. . . . . . .
New Unit Placement
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and Installing Louvers
. . . . . . . . . . . . . . . . . .
New or Replacement Line Set
. . . . . . . . . . . . . . . . . . . . .
Brazing Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Line Set and Indoor Coil
. . . . . . . . . . . . . . . .
Installing Indoor Metering Device
. . . . . . . . . . . . . . . .
Leak Test Line Set and Indoor Coil
. . . . . . . . . . . . . . .
Evacuating Line Set and Indoor Coil
. . . . . . . . . . . . .
Electrical Connections
. . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge
. . . . . . . . . . .
Unit Start−Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Refrigerant
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up and Performance Checklist
. . . . . . . . . . . . . .
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.
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
General
14ACX 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
14ACX Engineering Handbook.
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
14ACX Engineering Handbook.
This outdoor unit is designed for use in systems that use
one of the following refrigerant metering devices:
one of the following refrigerant metering devices:
Thermal expansion valve (TXV)
Fixed orifice
Litho U.S.A.