Lennox CHX35 Series User Manual

Page 1
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.
IMPORTANT: Special procedures are required for clean-
ing the aluminum coil in this unit. See page 8 in this in-
struction for information.
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.
INSTALLATION
INSTRUCTIONS
INDOOR COILS
507835-01 (067198001)
4/2018
CHX35 Series Coils
General Information
CHX35 horizontal evaporator coils are designed for use
with air conditioners and heat pumps and are supplied
with a factory-installed HFC-410A check/expansion 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-red furnace heat exchanger and at least
4" away from any drum-type or oil-red furnace heat ex-
changer. Closer spacing may damage the drain pan and
cause a leak.
Refer to the Product Specication bulletin (EHB) for the
proper use of these coils with specic 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.
Table of Contents
Model Number Identication ...........................................2
Specications ................................................................2
Releasing Air Charge .....................................................3
Installation .....................................................................3
Refrigerant Line Connections ........................................ 5
Leak Testing, Evacuating and Charging ........................ 6
Sealing Ducts ................................................................6
Condensate Drain Connections .....................................6
Blower Speed Selection ................................................7
Maintenance ..................................................................8

Lennox CHX35 Series Specifications

General

Series	CHX35
SEER Rating	Up to 16
Refrigerant	R-410A
Compressor Type	Scroll
Voltage (VAC)	208/230
Phase	1
Stages	Single

Summary

General Information

Model Number Identification

Specifications

18A-30B

Details specifications for CHX35 models 18A through 30B, including line sizes, coil dimensions, and shipping data.

36A-42C

Provides specifications for CHX35 models 36A through 42C, covering line connections, coil dimensions, and shipping details.

Releasing Air Charge

Installation

Left-Hand and Right-Hand Discharge

Instructions for positioning the coil with a 1/2" slope for left/right discharge and securing it to the furnace.

Right-Hand Air Discharge with Spacer

Guidance for installing the coil with right-hand discharge, using a field-provided spacer for clearance.

Refrigerant Line Connections

Line Sizes

Table and guidance for selecting appropriate refrigerant line set sizes for CHX35 models.

Suction Line Connection

Procedure for connecting the suction line to the indoor coil, including brazing guidelines and precautions.

Leak Testing, Evacuating and Charging

Sealing Ducts

Condensate Drain Connections

Main Drain

Instructions for connecting the main condensate drain line to a suitable outlet, avoiding closed systems.

Overflow Drain

Guidance on connecting the overflow drain line or plugging it, with best practices for routing.

Blower Speed Selection

Maintenance

Cleaning the Coil

Detailed steps for cleaning the aluminum coil using mild cleaners and water, with specific pH and pressure recommendations.