Lennox 10ACC-048-230 User Manual

Page 1
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-048-230 Specifications

General

Model	10ACC-048-230
Type	Heat Pump
Cooling Capacity (BTU/h)	48000
Heating Capacity (BTU/h)	48000
Voltage	230
Phase	1
Refrigerant	R-410A
Tonnage	4
SEER	16
HSPF	9

Summary

10ACC Series Units Overview

Unit Components

Control Box

Explains the electrical control box components like contactors, capacitors, and relays.

Compressor

Details the design and operation of the scroll compressor, including its unique compression mechanism.

Condenser Fan Motor

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

Refrigerant System

Plumbing and Connections

Covers liquid and suction line piping sizes, connection types, and installation guidance.

Service Valve Operation

Explains how to operate and use service valves for charging, leak testing, and system maintenance.

Charging Procedures

Pumping Down and Leak Testing

Details steps for pumping down the system and performing leak tests before evacuation.

Evacuating the System

Provides detailed instructions for evacuating the system to the required vacuum level.

Charging Methods

Explains weighing, subcooling, and approach methods for charging the refrigerant.

Maintenance

General Maintenance Checks

Outlines routine checks for the condenser coil, lines, wiring, voltage, and amp-draw.

Evaporator and Indoor Unit

Covers cleaning and checking the evaporator coil, condensate pan, and indoor unit components.

Wiring Diagrams and Sequence of Operation

Operating Sequence

Describes the sequence of operation for cooling demand and end of demand cycles.