Lennox HS29-311 User Manual

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 HS29-311 Specifications

General

Model	HS29-311
Type	Heat Pump
Phase	1
Number of Stages	1
Voltage	208/230

Summary

Unit Information

Unit Components

Control Box

Details electrical openings, thermostat wiring, and components within the control box.

Compressor Types

Describes rotary, reciprocating, and scroll compressor designs used in the HS29 series.

Refrigerant System

Plumbing and Lines

Covers field refrigerant piping, liquid/suction lines, and service ports for gauge manifold connection.

Service Valves

Explains access and operation of liquid and suction line service valves and their components.

Charging Procedures

Pumping Down System

Procedure for pumping down the system for leak checking, repairs, or making repairs to indoor coil.

Leak Testing

Steps for pressurizing the line set and indoor coil with nitrogen to check for leaks.

Evacuating the System

Instructions for evacuating the system to the required vacuum level using a vacuum pump.

Expansion Valve Charging

Procedure for charging systems using expansion valves, focusing on liquid line temperature.

RFCIV Systems Charging

Procedure for charging systems using RFCIV, focusing on condensing temperature and subcooling.

Maintenance

Outdoor Unit Maintenance

Instructions for cleaning and inspecting the condenser coil and connecting lines.

Indoor Coil Maintenance

Guidance on cleaning the indoor coil, checking connecting lines, and condensate line.

Indoor Unit Maintenance

Checks for filters, bearings, wiring, voltage, and blower motor amp-draw.

Wiring Diagrams and Sequence of Operation

HS29-1 Single-Phase Sequence (Reciprocating/Rotary)

Details the cooling sequence for single-phase units with reciprocating or rotary compressors.

HS29-2/-3 Single-Phase Sequence (Reciprocating/Rotary)

Explains the cooling sequence for HS29-2 and -3 single-phase units with specific compressors.

HS29 Three-Phase Sequence

Outlines the cooling sequence of operation for three-phase HS29 units.

HS29-1 Single-Phase Sequence (Scroll)

Describes the cooling sequence for HS29-1 single-phase units utilizing scroll compressors.

HS29-2/-3 Single-Phase Sequence (Scroll)

Details the cooling sequence for HS29-2 and -3 single-phase units with scroll compressors.

Service Notes