Lennox HS29-411 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 HS29-411 Specifications

General

Model	HS29-411
Type	Heat Pump
Compressor Type	Scroll
Phase	1
Cooling Capacity	41000 BTU/h
Voltage	208/230

Summary

Unit Information

Unit Components

Control Box

Details the control box, including contactors, capacitors, and transformers.

Compressor

Describes the rotary, reciprocating, and scroll compressor types used in HS29 units.

Refrigerant System

Plumbing

Outlines field refrigerant piping requirements and line set options.

Service Valves

Explains the function, access, and operation of liquid and suction line service valves.

Charging

Pumping Down System

Procedure for safely pumping down the system for maintenance or leak checking.

Leak Testing

Steps for pressurizing and checking the system for refrigerant leaks.

Evacuating the System

Detailed instructions for evacuating the system to the correct vacuum level.

Charging

Methods for charging the system with refrigerant, including weighing and subcooling.

Oil Charge

Directs users to the compressor nameplate for oil charge information.

Maintenance

Outdoor Unit

Instructions for cleaning and inspecting the outdoor unit's coil and lines.

Indoor Coil

Guidance on cleaning the indoor coil and checking condensate lines.

Indoor Unit

Steps for checking filters, bearings, wiring, voltage, and blower motor.

Wiring Diagrams and Sequence of Operation

HS29-1 Single-Phase Operating Sequence (Reciprocating or Rotary Compressor)

Explains the cooling sequence for HS29-1 single-phase units with specific compressors.

a-HS29 "P" Voltage Operation Sequence

Details the operational sequence for HS29 "P" voltage units, referencing diagrams.

HS29-2 & -3 Single-Phase Operating Sequence (Reciprocating or Rotary Compressor)

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

HS29 Three-Phase Operating Sequence (All Compressors)

Outlines the cooling sequence for HS29 three-phase units, covering all compressor types.

HS29-1 Single-Phase Operating Sequence (Scroll Compressors)

Explains the cooling sequence for HS29-1 single-phase units with scroll compressors.