Lennox CHX3518A Installation Instructions Manual

THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
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.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
NOTE - This unit CHX35 is a PARTIAL UNIT AIR CONDI-
TIONER, complying with PARTIAL UNIT requirements of
this Standard, and must only be connected to other units
that have been confirmed as complying to corresponding
PARTIAL UNIT requirements of this Standard, UL 60335-
2-40/CSA C22.2 No. 60335-2-40, or UL 1995/CSA C22.2
No 236.
Partial units shall only be connected to an appliance suit-
able for the same refrigerant
Shipping and Packing List
Package 1 of 1 contains:
1 - Evaporator coil
Check the components for shipping damage; if found, im-
mediately contact the last carrier.
WARNING
Maximum Altitude of application is 3200m above sea
level.
INSTALLATION
INSTRUCTIONS
CHX35 Series Coils - R410A
INDOOR COILS
Service Coil for Indoor Coil Replacement Only
(US applications)
For Servicing Existing Equipment Only
(US Applications)
507835-02
01/2025

Table of Contents

Model Number Identification ...........................................2
Releasing Air Charge .....................................................3
Installation .....................................................................3
Refrigerant Line Connections ........................................5
Leak Testing, Evacuating and Charging ........................5
Sealing Ducts ................................................................5
Condensate Drain Connections .....................................6
Blower Speed Selection ................................................7
Maintenance ..................................................................8
Decommissioning ..........................................................8
Every working procedure that affects safety means shall
only be carried out by competent persons. This appliance
is not to be used by persons (including children) with
reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have
been given supervision or instruction concerning use of
the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not
play with the appliance.
General Information
CHX35 all-aluminum coil horizontal evaporator coils are
designed for use with air conditioners and heat pumps and
are supplied with a factory-installed HFC-410A check/ex-
pansion valve.
The coil drain pan has a maximum service temperature
of 500°F. The drain pan must be at least 2" away from a
standard gas-fired furnace heat exchanger and at least
4" away from any drum-type or oil-fired furnace heat ex-
changer. Closer spacing may damage the drain pan and
cause a leak.
IMPORTANT: Special procedures are required for clean-
ing the aluminum coil in this unit. See page 8 in this in-
struction for information.
Refer to the Product Specification bulletin (EHB) for the
proper use of these coils with specific furnaces, outdoor
units and line sets.
These instructions are intended as a general guide and
do not supersede local or national codes in any way. Au-
thorities who have jurisdiction should be consulted before
installation.
Page 1
WARNING