Lennox HS24-411 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 HS24-411 Specifications

General

Brand	Lennox
Model	HS24-411
Category	Heat Pump
Language	English

Summary

UNIT INFORMATION

UNIT COMPONENTS

Details the various components of the HS24 series units, including control box, capacitors, and compressor.

UNIT COMPONENTS

Control Box

Details the control box for HS24 units with diagrams.

Compressor Contactor K1

Explains the function and operation of the compressor contactor.

Dual Capacitor C12

Describes the dual capacitor used for fan and compressor motors.

Start Capacitor C7

Details the start capacitor for compressor operation.

Transformer T5

Explains the role of the transformer in specific unit voltage configurations.

Potential (Start) Relay K31

Describes the potential relay controlling the start circuit.

Fan Capacitor C1

Details the capacitor used for fan motors in three-phase units.

Compressor Specifications

Provides specifications for the compressors used in HS24 units.

Rotary Compressor

Rotary Compressor Operation

Illustrates the four steps in the rotary compressor cycle.

Suction Muffler

Details the suction muffler for compressor protection.

Accumulator

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

Reciprocating Compressor

Describes the conventional reciprocating compressors used in most units.

Crankcase Heater and Compressor Cover

Crankcase Heater

Details the self-regulating crankcase heater for compressor lubrication.

Compressor Cover

Describes the vinyl-faced fiberglass cover for acoustic barrier.

Condenser Fan Motor and Refrigerant System

Condenser Fan Motor

Details the single-phase PSC fan motors and their operation.

Refrigerant System Plumbing

Covers field refrigerant piping and line set specifications.

Service Valves

Liquid Line Service Valve

Explains the operation and servicing of the liquid line service valve.

Suction Line Service Valve

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

CHARGING

Leak Testing

Procedure for checking refrigerant lines and connections for leaks.

Evacuating the System

Steps for evacuating the system to remove air and moisture.

Charging

Methods for charging the system with refrigerant, including weighing.

Expansion Valve Systems

Procedures for charging expansion valve systems using approach method.

RFCII Systems and Maintenance

RFCII Systems

Procedures for charging RFCII systems using subcooling method.

Oil Charge

Information on factory oil charge for HS24 units.

Maintenance

Seasonal maintenance for outdoor and indoor units.

WIRING DIAGRAMS AND SEQUENCE OF OPERATION

Single Phase Operating Sequence

Details the sequence of operation for single phase HS24 units.

Three Phase Operating Sequence

Details the sequence of operation for three phase HS24 units.