Lennox HS24-461 User Manual

SERVICE
HS24
UNIT
INFORMATION
Page 1
1992 Lennox Industries Inc.
Corp. 9201ĆL1 Litho U.S.A.
HS24 SERIES UNITS
The HS24 is a highĆefficiency residential splitĆsystem conĆ
densing unit. Extra large condensing coil, coil circuiting
and high condenser air volume result in a high SEER rating
(minimum of 10.0). The series is designed for use with an
expansion valve or RFCII system in the indoor unit.
All compressors are hermetically sealed for troubleĆfree
operation and long service life. Compressor components
are spring mounted within the sealed housing. The comĆ
pressor is installed in the unit on resilient rubber mounts to
assure quiet, vibrationĆfree operation. A builtĆin protection
device assures protection from excessive current and temĆ
peratures.
HS24-510 through HS24-650 models are furnished with
crankcase heaters as standard equipment to assure proper
compressor lubrication at all times. The heater is temperaĆ
tureĆactuated and operates only when required.
Several models are available in sizes ranging from 1
through 5 tons.
This manual is divided into sections which discuss the maĆ
jor components, refrigerant system, charging procedure,
maintenance and operation sequence.
All specifications in this manual are subject to change.
SPECIFICATIONS
Model No. HS24Ć141 HS24Ć211 HS24Ć261 HS24Ć311
N t f ( ft )
12 60
12 60
12 60
14 70
Net face area (sq. ft.) 12.60 12.60 12.60 14.70
Condenser
Coil
Tube diameter (in.) & no. of rows 3/8 Ċ 1 3/8 Ċ 1 3/8 Ċ 1 3/8 Ċ 1
Coil
Fins per inch 20 20 20 20
Diameter (in.) & no. of blades 20 Ċ 3 20 Ċ 3 20 Ċ 3 20 Ċ 3
Condenser Motor hp 1/6 1/6 1/6 1/6
Fan Cfm 2500 2500 2500 2700
Rpm 850 850 850 850
Watts 200 200 200 205
*Refrigerant Ċ 22 charge furnished 4 lbs. 5 oz. 4 lbs. 10 oz. 5 lbs. 7 oz. 5 lbs. 12 oz.
Liquid line (o.d. in.) connection (sweat) **3/8 ***3/8 ***3/8 3/8
Suction line (o.d. in.) connection (sweat) 1/2 5/8 5/8 3/4
Shipping weight (lbs.) 1 package 121 153 154 168
*Refrigerant charge sufficient for 25 ft. length of refrigerant lines.
** 3/8" x 1/4" reducer furnished to adapt to 1/4 field fabricated line set.
*** 3/8" x 5/16" reducer furnished to adapt unit to 5/16" line set.

Lennox HS24-461 Specifications

General

Brand	Lennox
Model	HS24-461
Category	Heat Pump
Language	English

Summary

HS24 Series Units Overview

Unit Description and Features

Details the HS24 as a high-efficiency residential split-system condensing unit.

Specifications Summary

Introduces the detailed technical specifications for various HS24 models.

Unit Information and Capacities

Unit Capacities and Component Matching

Discusses available unit capacities and the importance of matching components for warranty.

Unit Components and Controls

Control Box Description

Explains the function and contents of the unit's control box for single and three-phase units.

Compressor Contactor (K1)

Details the compressor contactor's role in energizing the compressor via the thermostat.

Dual Capacitor (C12)

Explains the dual capacitor used for compressor and fan motors in single-phase units.

Start Capacitor (C7)

Describes the start capacitor used in specific HS24 units for compressor startup.

Transformer (T5)

Details the transformer used in 'J' voltage units for the fan motor.

Potential (Start) Relay (K31)

Explains the potential relay's function in controlling the start capacitor for specific units.

Fan Capacitor (C1)

Details the fan capacitor used in three-phase units.

Compressor Specifications

Provides a table of specifications for various HS24 compressors.

Crankcase Heater

Details the self-regulating crankcase heater used in specific HS24 models.

Compressor Cover

Describes the vinyl-faced fiberglass compressor cover for acoustic barrier.

Condenser Fan Motor

Explains the single-phase PSC fan motors and their connection to the compressor contactor.

Compressor Types and Operation

Rotary Compressor Description (-141 Units)

Details the hermetically sealed rotary compressor used in HS24-141 units.

Rotary Compressor Operation Cycle

Illustrates the four steps of the rotary compressor's operating cycle.

Suction Muffler (-141 Units)

Describes the suction muffler for compressor protection in HS24-141 units.

Accumulator (-141 Units)

Explains the accumulator's role in protecting the compressor from liquid slugging.

Reciprocating Compressor (Other Units)

Describes the conventional reciprocating compressors used in HS24 units other than -141.

Refrigerant System and Plumbing

Plumbing and Line Set Specifications

Details field refrigerant piping and Lennox L10 series line set specifications.

Liquid Line Service Valve

Describes the full service liquid line valve, its operation and port access.

Caution and Importance Notes for Liquid Line Valve

Provides critical safety and operational notes for using the liquid line service valve.

Suction Line Service Valve Description

Details the non-backseating suction line service valve and its components.

Warning and Safety for Suction Valve

Emphasizes the warning against backseating suction valves to prevent damage.

Charging Procedures

Refrigerant Charge Adjustment

Explains how to adjust refrigerant charge based on line set length.

Leak Testing Procedure

Details the process of leak testing using dry nitrogen.

System Evacuation

Outlines the procedure for evacuating the system to remove air and moisture.

Charging the System

Describes the recommended method for charging the unit with refrigerant by weight.

Refrigerant Charge Table

Lists the factory R-22 refrigerant charge for different HS24 unit models.

Expansion Valve Systems Charging

Provides procedures for charging expansion valve systems using approach method.

Normal Operating Pressures

Offers a guide to normal operating pressures for various HS24 models.

RFCII Systems Charging Method

Outlines the subcooling method for charging RFCII systems.

Subcooling Method Reference

Provides subcooling values for different outdoor temperatures and HS24 models.

Maintenance and Operation

Oil Charge Specifications

Refers to factory oil charge amounts for HS24 units.

Outdoor Unit Maintenance

Details cleaning and inspection of the outdoor unit components.

Indoor Coil Maintenance

Covers cleaning the indoor coil and checking for oil leaks.

Indoor Unit Maintenance

Includes filter changes, blower motor lubrication, and wiring checks.

Wiring Diagrams and Sequence of Operation

Single Phase Operating Sequence

Details the sequence of operation for single-phase HS24 units with cooling demand.

Three Phase Operating Sequence

Outlines the sequence of operation for three-phase HS24 units with cooling demand.