Lennox HS21 Series User Manual

Page 1
 1999 Lennox Industries Inc.
Litho U.S.A.
Corp. 9406-L3
HS21
Service Literature
EARLY / LATE
MODEL SERIES
Revised 10-2000
HS21 SERIES UNITS
HS21 early model units ( -411, -511, -651) and late model
units (-036, -048, -060) are high efficiency residential splitĆ
system condensing units which features a twoĆspeed
compressor. Models are available in sizes ranging from 3
through 5 tons in either single or threeĆphase configuration.
The series features solidĆstate twoĆspeed control, which regĆ
ulates compressor speed in response to thermostat
demand. The HS21 is designed for use with an expansion
valve at the indoor coil.
This manual is divided into sections which discuss the comĆ
ponents, refrigerant system, charging procedures,
maintenance and operation sequences.
Information contained in this manual is intended for use by
qulified service technicians only. All specifications are
subject to change. Procedures outlined in this manual are
presented as a recommendation only and do not superĆ
sede or replace local or state codes. In the absence of
local or state codes, the guidelines and procedures outĆ
lined in this manual (except where noted) are
recommended only.
LATE
MODEL
HS21 SHOWN
ELECTRICAL DATA (Early Model)
SPECIFICATIONS (Early Model)
Model No.
HS21Ć411
HS21Ć413
HS21Ć511
HS21Ć513
HS21Ć651
HS21Ć653
Condenser Coil
Condenser Fan
Refrigerant Charge (HCFCĆ22)
Face area (sq.ft.)
Tube diameter (in.)
No. of Rows
Fins per inch
Diameter (in.)
No. of Blades
Motor hp
Cfm
Rpm
Watts
Liquid line connection (sweat)
Suction line connection (sweat)
Model No.
Line voltage data Ć 60hz.
Compressor
Rated load amps
Power factor
Locked rotor amps
Outdoor Coil
Fan Motor
Full load amps
Locked rotor amps
Max fuse or circuit breaker size (amps)
*Minimum circuit ampacity
HS21Ć511 HS21Ć513 HS21Ć651 HS21Ć653
208/230/1ph 208/230/3ph208/230/3ph 208/230/1ph208/230/1ph 208/230/3ph
334
90.0 60.0 120.0 85.0 141.0 91.0
outside / inside
21.64/
20.81
21.64/
20.81
23.92/
23.01
3/8 3/8 3/8
222
20 20 20
24 24 24
1/6 1/6 1/4
3200 3200 4200
815 815 815
170 310170
11lbs. 6oz. 11lbs. 14oz. 13lbs. 14oz.
3/8 3/8 3/8
7/8 7/8 1Ć1/8
17.6 12.7 21.6 15.8 30.8 19.9
.98 .90 .98 .90 .92 .90
1.0 1.0 1.0 1.0 1.7 1.7
1.9 1.9 1.9 1.9 2.9 2.9
40 25 45 35 60 45
23.0 16.9 28.0 20.8 40.2 26.6
HS21Ć411 HS21Ć413
*Refer to National Electrical Code Manual to determine wire, fuse and disconnect size requirements.
NOTE - Extremes of operating range are plus 10% and minus 5% of line voltage

Lennox HS21 Series Specifications

General

Brand	Lennox
Model	HS21 Series
Category	Heat Pump
Language	English

Summary

Application Overview and ESD Precautions

Application Overview

Details the importance of matching components for warranty and performance.

Electrostatic Discharge (ESD) Precautions

Guidelines for preventing damage to electronic controls from static discharge.

Control Box Components

Identifies components located within the unit's control box.

Component Operation and Specifications

Single-Phase Contactor Operation

Explains how contactors K1 and K69 function in single-phase units.

Three-Phase Contactor Operation

Details the operation of contactors K1 and K69 in three-phase units.

Unit Components and Optional Equipment

Unit Components Overview

Details various internal components of the HS21 unit.

Compressor (B1)

Information on the compressor, including voltage and internal relief valves.

Optional Equipment

Information on optional accessories like humidity control and low ambient kits.

TSC5 Two-Speed Control Operation

TSC5 Normal Operation Sequence

Describes the step-by-step sequence for normal unit operation.

TSC5 Control Faults and Troubleshooting

TSC5 Two-Speed Control Fault Conditions

Explains fault conditions, lockout procedures, and diagnostic indicators.

TSC5 Lockout Reset and Troubleshooting

Instructions for resetting the control after a lockout and troubleshooting.

TSC5 Control System Operation

Mode Selection and Test Mode

Details jumper settings for modes, test mode, and LED indicators.

Diagnostic Codes and Display

Explains how diagnostic codes are displayed, recalled, and their meanings.

TSC5 Diagnostic Codes Explained

Refrigerant System and Maintenance

Plumbing, Muffler, Thermometer Well, and Valves

Details refrigerant piping, muffler, well, and service valves.

Routine Maintenance and Control Box Weatherproofing

Guidelines for system cleaning and control box sealing.

Service Valve Operation

Liquid Line Service Valve

Instructions for accessing and operating the liquid line service valve.

Suction Line Service Valve

Details on the suction line service valve, including schrader valve access.

Refrigerant Charging and Leak Testing

Charging Procedures

Procedures for charging the system with refrigerant, including adjustments.

Leak Testing Procedure

Steps for performing leak tests using nitrogen and refrigerant.

System Evacuation and Charging

Evacuating the System

Detailed steps for evacuating the system to remove non-condensables.

Approach Method Charging

Charging guidelines using ambient temperature and liquid line temperature.

Maintenance Checks and Specifications

Operating Pressures and Maintenance Tables

Reference tables for maintenance checks and operating pressures.

Oil Charge and Miscellaneous Notes

Specifies oil charge and control box weatherproofing details.

Compressor Operation Sequence

Single-Phase Compressor Start-Up

Explains the electrical sequence for starting single-phase compressors.

Three-Phase Compressor Start-Up

Describes the start-up sequence for three-phase compressors.

Wiring Diagrams and Operation Sequence

HS21 Single-Phase Wiring Diagram

Wiring diagram for single-phase HS21 models (-036, -048, 060).

Sequence of Operation

Overview of the unit's operational sequences.

Single-Phase Wiring Diagrams

HS21 Single-Phase Wiring (-411, -511, -651)

Wiring diagram specific to single-phase HS21 models.

Accessory Wiring Diagrams

Wiring diagrams for optional accessories like humidity control thermostats.

Single-Phase Unit Operation Sequences

Starting Sequence

Step-by-step process for starting single-phase HS21 units.

Compressor Start-Up and Cooling Sequence

Specific sequences for compressor start-up and cooling operations.

Three-Phase Wiring Diagram (-036, -048, -060)

Three-Phase Wiring Diagram (-413, -513, -653)

Three-Phase Unit Operation Sequences

Starting Sequence and Compressor Start-Up

Step-by-step process for starting three-phase HS21 units.

High Speed and Cooling Sequence

Sequences for high speed operation and three-phase cooling.