Lennox HS24-141 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 HS24-141 Specifications

General

Brand	Lennox
Model	HS24-141
Category	Heat Pump
Language	English

Summary

HS24 Series Units Overview

HS24 Series Specifications

Condenser Specifications

Details specifications for the condenser coil, fan motor, and fan performance.

Refrigerant and Connections

Lists refrigerant charge and line set connection sizes for various models.

HS24 Unit Capacities and Component Matching

HS24 Unit Components Overview

Control Box - Single Phase

Describes the components within the control box for single-phase HS24 units.

Control Box - Three Phase

Illustrates the control box components for three-phase HS24 units.

Safety Warning - Shock Hazard

Critical safety warning regarding electrical shock hazard during servicing.

Compressor Contactor (K1) Function

Dual Capacitor (C12) Ratings

Start Capacitor (C7) Function

Transformer (T5) for "J" Voltage Units

Potential (Start) Relay (K31) Operation

Fan Capacitor (C1) Ratings

Compressor Specifications

Rotary Compressor Operation (HS24-141)

Suction Muffler for HS24-141 Units

Explains the function and construction of the suction muffler.

Accumulator for HS24-141 Units

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

Reciprocating Compressor (All Other Units)

Crankcase Heater Function

Compressor Cover for Acoustic Barrier

Condenser Fan Motor Specifications

Refrigerant System Overview

Refrigerant Plumbing and Line Sets

Information on refrigerant piping, line sets, and service ports.

Service Valves: Liquid and Suction Lines

Liquid Line Service Valve Operation

Explains the function, operation, and safety precautions for the liquid line service valve.

Caution: Liquid Line Service Port

Important caution regarding sealing the liquid line service port to prevent leakage.

Important: Liquid Line Service Port

Note that the liquid line service port lacks a Schrader valve and requires backseating.

Accessing and Closing Liquid Line Service Port

Step-by-step procedures for accessing and closing the liquid line service port.

Opening and Closing Liquid Line Service Valve

Procedures for opening and closing the liquid line service valve.

Suction Line Service Valve Operation

Warning: Suction Line Valve Non-Backseating

Critical warning against attempting to backseat the suction line service valve.

Accessing Schrader Port (Suction Valve)

Procedure for accessing the Schrader port on the suction line service valve.

Opening Suction Line Service Valve

Steps for opening the suction line service valve.

Closing Suction Line Service Valve

Steps for closing the suction line service valve.

Refrigerant Charging Procedures

Important: Charging Method

Emphasizes using accurate readings for charging.

Important: Vacuum Gauge Type

Recommends specific gauge types for accurate vacuum readings.

Important: Compressor for Evacuation

Warning against using the compressor for system evacuation.

Evacuating the System

Step-by-step guide for evacuating the refrigeration system.

Leak Testing

Procedure for leak testing the system using dry nitrogen.

Caution: Nitrogen Pressure

Safety caution regarding the use of a pressure regulator with nitrogen.

Charging Method

Recommends weighing refrigerant for accurate charging.

Expansion Valve System Charging

Important: Charging Accuracy

Stresses the need for accurate ambient temp, liquid temp, and pressure readings.

Expansion Valve Charging Procedure

Step-by-step procedure for charging expansion valve systems.

Important: Approach Temperature

Guides on using approach temperature to adjust refrigerant charge.

Normal Operating Pressures Guide

Table of normal operating pressures for various conditions.

RFCII System Charging

Important: RFCII Charging Accuracy

Emphasizes accurate readings for RFCII system charging.

RFCII Charging Procedure

Step-by-step procedure for charging RFCII systems using subcooling.

Subcooling Method Guide

Table for subcooling calculations based on outdoor temperature.

Oil Charge Specifications

Periodic Maintenance Procedures

Outdoor Unit Maintenance

Cleaning and inspection of the outdoor unit components.

Indoor Coil Maintenance

Cleaning procedures for the indoor coil and condensate line.

Indoor Unit Maintenance

Filter cleaning/replacement and blower motor lubrication.

Wiring Diagrams and Sequence of Operation

Single Phase Operating Sequence

Outlines the sequence of operation for single-phase HS24 units.

Component Key (Single Phase)

Identifies components used in the single-phase wiring diagram.

Three Phase Operating Sequence

Three Phase Voltage Designations

Lists voltage designations for three-phase HS24 units.

Three Phase Operating Sequence (Y, G, J Voltage)

Describes the sequence of operation for specific three-phase voltage units.

Component Key (Three Phase)

Identifies components used in the three-phase wiring diagram.