Lennox HS29-024

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 HS29-024 Specifications

General

Model	HS29-024
Type	Heat Pump
Brand	Lennox
Cooling Capacity (BTU/h)	24000
Heating Capacity (BTU/h)	24000
Refrigerant	R-410A
Compressor Type	Scroll
Number of Stages	Single
Voltage (V)	208/230
Phase	1
Maximum Operating Ambient Temperature (°F)	115
Sound Level (dBA)	76

Summary

HS29 Unit Specifications

HS29 Unit Specifications (Continued)

Detailed specifications for various HS29 models, including condenser coil and fan data.

HS29 Unit Specifications (Continued)

HS29 Electrical Data

Electrical specifications including line voltage, rated load amps, power factor, and circuit breaker sizes.

HS29 Electrical Data (Continued)

HS29 Unit Components

HS29 Compressor Types

Description of different compressor types (rotary, reciprocating, scroll).

Fan Motor and Compressor Access

Refrigerant System Plumbing

Details on field refrigerant piping, line sets, and service ports for charging.

Service Valve Operation and Safety

Closing Service Valves

Steps for closing liquid and suction line service valves, including specific instructions for 5-ton units.

Refrigerant Charging Procedures

Refrigerant Charge Adjustment Table

Pumping Down the System

Steps for pumping down the system for leak checking or repairs, including safety cautions.

Leak Testing Procedures

Detailed procedure for leak testing the system using nitrogen.

Evacuating the Refrigeration System

Steps for evacuating the system to the correct vacuum level.

Refrigerant Charging Methods

Charging Expansion Valve Systems

Procedure for charging expansion valve (TXV) systems using the approach method.

TXV Approach Temperature Data

Charging RFCIV Systems

Procedure for charging RFCIV systems using liquid line temperature.

Periodic Maintenance Procedures

Outdoor Unit Maintenance

RFC System Subcooling Data

Normal Operating Pressures Table

Table of typical operating pressures for various HS29 models and conditions.

Normal Operating Pressures Table (Continued)

RFC System Subcooling Data (Continued)

Wiring Diagrams and Operation Sequence

HS29-1 Single-Phase Sequence (ReciprocatingRotary)

Sequence of operation for HS29-1 single-phase units with reciprocating or rotary compressors.

HS29 P Voltage Operation Sequence

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

HS29 P Voltage Operation Sequence (for -2-3 Models)

HS29 Three-Phase Operating Sequence

HS29 Y, G, J Voltage Operation Sequence

HS29-1 Single-Phase Sequence (Scroll Compressors)

HS29 P Voltage Operation Sequence (Scroll Compressors)

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