Lennox 10ACC-042-230 User Manual

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ã 2002 Lennox Industries Inc.
Litho U.S.A.
Corp. 0201-L1
10ACC
Service Literature
10ACC SERIES UNITS
The 10ACC is a residential split-system condensing
unit available in sizes ranging from 1-1/2 to 5 tons. Con-
densing 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
indoor unit.
10ACC 1-1/2 to 3 ton units are equipped with reciprocating
compressors. All compressors are hermetically sealed for
long service life. The compressor is installed in the unit on re-
silient rubber mounts to assure quiet, vibration-free operation.
A built-in protection device assures protection from excessive
current and temperatures.
10ACC3-1/2to5ton units are equipped with scroll com-
pressors. The scroll operates likea standard compressorbut
it is unique in the way it compresses refrigerant.
WARNING
Refrigerant can be harmful if it is inhaled. Refriger-
ant must be used and recovered responsibly.
Failure to follow this warning may result in person-
al injury or death.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon-
nect switch(es). Unit may have multiple
power supplies.
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.
IMPORTANT
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser-
vice must be performed by a qualified installer or
service agency.

Lennox 10ACC-042-230 Specifications

General

Model	10ACC-042-230
Type	Heat Pump
Cooling Capacity (BTU/h)	42000
Energy Efficiency Ratio (EER)	11.5
Voltage	230
Stages	Single
Refrigerant Type	R-410A
Sound Level (dB)	76
Phase	1
Heating Capacity (BTU/h)	42000

Summary

10ACC Series Units

General and Component Overview

I - General

Covers general unit information, safety warnings, and system matching.

II - Unit Components

Introduces the main components of the 10ACC condensing unit.

Detailed Unit Components

A - Control Box

Details electrical components within the control box like contactors and capacitors.

B - Compressor

Explains the scroll compressor design, operation, and critical usage notes.

C - Condenser Fan Motor

Describes the condenser fan motor, its requirements, and access for maintenance.

Refrigerant System and Charging Procedures

III - Refrigerant System

Covers field refrigerant piping, line sets, and service valve operation.

IV - Charging

Outlines procedures for pumping down, leak testing, and charging the system.

Charging Methods Details

Weighing Refrigerant Charge (Low Temp)

Method for weighing refrigerant charge for low outdoor temperatures.

Subcooling Method for Fixed Orifice Systems

Procedure for charging fixed orifice systems above 65°F using subcooling.

Approach Method for TXV Systems

Procedure for charging TXV systems at or above 60°F using the approach method.

Maintenance and Wiring

E - Maintenance

Covers routine maintenance checks for the condensing unit and indoor components.

V - Wiring Diagrams and Sequence of Operation

Provides wiring diagrams and the cooling operation sequence for the unit.