Lennox CH35 Series

Page 1
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER 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.
WARNING
Risk of explosion or fire.
Can cause injury or death.
Recover all refrigerant to relieve pressure before
opening the system.
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
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
CH35 Series Units
INDOOR COILS WITH ALL-ALUMINUM COIL
507656-01
7/2018
NOTE - Not available in all areas. Contact your nearest
Lennox Sales Office for details.
Table of Contents
General 1......................................
Shipping and Packing List 1......................
Specifications 2.................................
Releasing Air Charge 3..........................
Installation 3....................................
Refrigerant Line Connections 5...................
Leak Testing, Evacuating and Charging 6..........
Sealing Ducts 6.................................
Condensate Drain Connection 6..................
Blower Speed Connection 7......................
Maintenance 8..................................
General
CH35 all-aluminum coil horizontal evaporator coils are
designed for use with air conditioners and heat pumps.
Each coil is equipped with a compression fitting that
provides convenient field installation of a properly sized,
separately ordered expansion valve.
The coil drain pan is high quality engineering polymer with
a maximum service temperature of 500°F. However,
adequate space must be provided between the drain pan
and furnace heat exchanger. At least 2" space is required
for heat exchanger and 4" for drum-type or oil-fired furnace
heat exchanger. Closer spacing may damage the drain
pan and cause leaking.
Refer to the CH35 Product Specification bulletin (EHB) for
proper use of these coils with specific furnaces, air
conditioners, heat pumps and line sets.
These instructions are intended as a general guide and do
not supersede local or national codes in any way. Consult
authorities who have jurisdiction before installation.
IMPORTANT: Special procedures are required for
cleaning the aluminum coil in this unit. See page 8 in this
instruction for information.
Shipping and Packing List
Package 1 of 1 contains the following:
1 - CH35 evaporator coil
Check the components for shipping damage. If you find
any damage, immediately contact the last carrier.

Lennox CH35 Series Specifications

General

Brand	Lennox
Model	CH35 Series
Category	Air Conditioner
Language	English

Summary

Installation Instructions

General Coil Information

Overview of the CH35 all-aluminum coil and its application with AC/heat pumps.

Shipping and Packing List

Details package contents and checks for shipping damage.

Technical Specifications

Lists technical specifications for the CH35 series indoor coils.

Safety and Preparation

Covers safety warnings and initial preparation steps like releasing air charge.

Model Number Identification

Unit Type and Series Explanation

Explains the unit type (Indoor Coil - Horizontal) and series designation.

Nominal Cooling Capacity Tonnage

Details the cooling capacity tonnage represented by model number digits.

Cabinet and Metering Device Codes

Explains cabinet width designations and metering device types.

Refrigerant and Installation Steps

Releasing Air Charge Procedure

Safely releases the factory air charge from the coil.

Coil Mounting and Orientation

Instructions for mounting the coil and its orientation for airflow.

Duct and Coil Connections

Supply Duct Securing

Secures the supply duct to the coil cabinet.

System Leak Testing

Refers to outdoor unit instructions for leak testing procedures.

D-Width Coil with C-Width Furnace

Application notes for specific coil and furnace width combinations.

Refrigerant Line Connections

Line Set Sizing Recommendations

Guidance on sizing refrigerant line sets according to outdoor unit instructions.

Suction Line Brazing Procedure

Step-by-step instructions for brazing the suction line connection.

Liquid Line Orifice Replacement

Procedure for removing the factory orifice and installing an expansion valve.

Condensate Drain and Duct System

Condensate Drain Best Practices

Recommended practices for optimal condensate removal.

Duct System Sizing

Importance of properly sizing and installing duct systems.

Drainage and Airflow Measurement

Main and Overflow Drain Line Setup

Diagrams and instructions for typical main and overflow drain installations.

Static Pressure Test Procedure

Instructions for measuring static pressure to ensure proper airflow.

Maintenance and Coil Cleaning

Air Volume and Static Pressure Table

Table relating air volumes, static pressure drop, and cabinet width.

Coil Cleaning Procedure

Step-by-step guide for cleaning the aluminum coil using recommended methods.