Lennox HS29-042

Page 1
©1998 Lennox Industries Inc.
Corp. 9802−L3
HS29
Service Literature
Revised 04−2004
HS29 SERIES UNITS
The HS29 is a residential split-system condensing unit.
Condensing coil size, circuiting and air volume result in a
minimum SEER rating of 10.0. The series is designed for
use with an expansion valve or RFCIV system in the in-
door unit. However, the HS29−651 and −060 use only the
TXV system.
The HS29−141 and −012 utilizes a rotary compressor. Other
HS29 units (−018, −024−2 and −211 through −653) utilize a recip-
rocating compressor. All compressors are hermetically sealed
for trouble-free operation and long service life. Compressor
components are spring-mounted within the sealed housing.
The compressor is installed in the unit on resilient rubber
mounts to assure quiet, vibration-free operation. A built-in
protection device assures protection from excessive
current and temperatures.
HS29−460 through HS29−650 models are furnished with
crankcase heaters to assure proper compressor lubrica-
tion at all times. The heater is temperature-actuated and
operates only when required. HS29−024−3 and HS29−030
through −060 units utilize a scroll compressor. The scroll oper-
ates like a standard compressor but it is unique in the way it
compresses refrigerant.
Several models are available in sizes ranging from 1 through 5
tons.
WARNING
Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered responsibly.
Failure to follow this warning may result in personal
injury or death.
IMPORTANT
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a qualified installer or service
agency.
This manual is divided into sections which discuss the
major components, refrigerant system, charging proce-
dure, maintenance and operation sequence.
All specifications in this manual are subject to change.
TABLE OF CONTENTS
Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I Unit Information 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II Unit Components 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Refrigerant System 8. . . . . . . . . . . . . . . . . . . . . . . . . .
IV Charging 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VI Wiring Diagrams and Operation Sequence 15. . . . . .

Lennox HS29-042 Specifications

General

Brand	Lennox
Model	HS29-042
Category	Heat Pump
Language	English

Summary

HS29 Condensing Unit Overview

Unit Capacities and System Matching

Details HS29 condensing unit capacities, system matching for warranty, and potential issues from misapplication.

HS29 Unit Components and Features

Control Box and Electrical Components

Describes the control box, field wiring, contactors, dual capacitors, transformers, and start capacitors.

Compressor Types and Characteristics

Explains rotary, reciprocating, and scroll compressor types, their operation, and key features.

Scroll Compressor Design and Operation

Detailed explanation of the scroll compressor's unique design, operation, efficiency, and critical vacuum handling precautions.

Refrigerant System Plumbing and Service

Refrigerant Piping and Line Set Selection

Information on field refrigerant piping, liquid/suction lines, and Lennox line set selection for proper installation.

Service Valve Operation and Safety Precautions

Instructions on accessing and operating liquid/suction line service valves, including critical safety warnings and procedures.

System Charging, Evacuation, and Leak Testing

Pumping Down and Leak Testing Procedures

Procedures for safely pumping down the system, performing leak tests with nitrogen, and checking connections.

System Evacuation and Refrigerant Charging

Detailed steps for evacuating the system to the required vacuum level and methods for refrigerant charging.

Routine Maintenance and System Checks

Outdoor Unit Cleaning and Inspection

Steps for cleaning and inspecting the outdoor unit's condenser coil and connecting lines for oil leaks.

Indoor Unit Cleaning and Inspection

Instructions for cleaning the indoor coil, checking connections, and cleaning the condensate line.

Wiring Diagrams and Operating Sequences

HS29-1 Single-Phase Operation (ReciprocatingRotary)

Wiring diagram and sequence of operation for HS29-1 single-phase units with reciprocating or rotary compressors.

HS29-2 & -3 Single-Phase Operation (ReciprocatingRotary)

Wiring diagram and sequence of operation for HS29-2 and -3 single-phase units with reciprocating or rotary compressors.

HS29 Three-Phase Operation Sequence

Wiring diagram and sequence of operation for HS29 three-phase units, covering all compressor types.

HS29-1 Single-Phase Operation (Scroll Compressors)

Wiring diagram and sequence of operation for HS29-1 single-phase units with scroll compressors.

HS29-2 & -3 Single-Phase Operation (Scroll Compressors)

Wiring diagram and sequence of operation for HS29-2 and -3 single-phase units with scroll compressors.