American Standard 4A7A4048N User Manual

11-AC11D1-9E-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
Condensing Units
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. Some of the benefits of
installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall
system reliability.
4A7A4018 – 060
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation.................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 6
Section 6. Refrigerant Line Routing ..................................................... 7
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................. 10
Section 9. Evacuation .......................................................................... 11
Section 10. Service Valves .................................................................. 11
Section 11. Electrical - Low Voltage ................................................... 12
Section 12. Electrical - High Voltage .................................................. 15
Section 13. Start Up.............................................................................. 16
Section 14. System Charge Adjustment............................................. 17
Section 15. Checkout Procedures ...................................................... 23
Section 16. Refrigerant Circuits .......................................................... 23
Section 17. Wiring Diagrams ............................................................... 26
Section 18. Pressure Curves ............................................................... 36
Installation and Operation Manual

American Standard 4A7A4048N Specifications

General

Model	4A7A4048N
Type	Air Conditioner
Refrigerant	R-410A
Voltage	208/230V
Phase	1
HSPF Rating	Not Applicable
Stages	1
Heating Capacity	Not Applicable
Compressor Type	Single Stage
SEER Rating	Up to 14 SEER

Summary

Section 1. Safety

Electrical Safety Warnings

Safety warnings related to live electrical components during servicing.

R-410A Refrigerant Safety

Precautions and requirements for handling R-410A refrigerant.

Liquid Line Service Valve Safety

Critical warning for safely operating the liquid line service valve.

Section 5. Refrigerant Line Considerations

Section 7. Refrigerant Line Brazing

Brazing Procedure Steps

Detailed steps for brazing refrigerant lines, including preparation and execution.

Section 8. Refrigerant Line Leak Check

Leak Detection Procedure

Procedures for checking refrigerant lines for leaks using nitrogen and soapy solution.

Section 9. Evacuation

Evacuation Procedure

Steps for evacuating refrigerant lines and indoor coil to the required micron level.

Section 10. Service Valves

Opening Gas Service Valve

Opening Liquid Service Valve

Critical procedure for safely opening the liquid service valve with warnings.

Section 11. Electrical - Low Voltage

Low Voltage Hook-up Diagrams

Section 12. Electrical - High Voltage

High Voltage Power Supply & Safety

Information on high voltage power supply requirements and safety precautions.

High Voltage Disconnect Switch

High Voltage Grounding

Section 13. Start Up

System Start-Up Procedure

Step-by-step procedure for starting up the installed system.

Section 14. System Charge Adjustment

Temperature Measurements for Charging

Instructions for measuring temperatures to determine system charge.

Subcooling Charging Procedure

Detailed steps for subcooling charging, including charts and adjustments.

Performance Verification

Fixed Orifice Superheat Charging

Table for determining superheat for fixed orifice systems.

Section 17. Wiring Diagrams

Wiring Diagrams (018N, 019N, etc.)

Electrical wiring diagrams for specific outdoor unit models.

Wiring Diagrams (030N, 036N, etc.)

Wiring Diagrams (060N Models)

Wiring Diagrams (018L, 024/25L, etc.)

Wiring Diagrams (060L Models)

Section 18. Pressure Curves

Pressure Curves (4A7A4018N1)

Pressure Curves (4A7A4019N1)

Pressure Curves (4A7A4024N1, etc.)

Pressure Curves (4A7A4048N1, etc.)

Pressure Curves (4A7A4018L1)

Pressure Curves (4A7A4024L1, etc.)

Pressure Curves (4A7A4060L1)