American Standard 4A7A4018N 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 4A7A4018N Specifications

General

Brand	American Standard
Model	4A7A4018N
Category	Air Conditioner
Language	English

Summary

Unit Location Considerations

Unit Dimensions and Weight

Details unit dimensions and weight for various models, including a table.

Refrigerant Piping Limits

Specifies maximum refrigerant line length and vertical change.

Suggested Locations for Best Reliability

Provides guidance on optimal placement for unit performance and noise.

Coastal Considerations

Advises on specific requirements for coastal installations.

Unit Preparation

Prepare The Unit For Installation

Steps for checking unit for damage and removing it from the pallet.

Setting the Unit

Pad Installation

Guidelines for installing the unit on a support pad, including material and leveling.

Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Table detailing line sizes and service valve connections for different models.

Factory Charge

Information on the factory refrigerant charge and verification methods.

Required Refrigerant Line Length

Instructions to determine required line length and lift for system calculations.

Refrigerant Line Insulation

Guidelines for insulating refrigerant lines to prevent condensation and contact.

Reuse Existing Refrigerant Lines

Precautions and requirements for using existing refrigerant lines during installation.

Refrigerant Line Routing

Precautions

Advises on routing lines to prevent noise and vibration transmission in structures.

Refrigerant Line Brazing

Braze The Refrigerant Lines

Step-by-step instructions for preparing and brazing refrigerant lines.

Refrigerant Line Leak Check

Check For Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks.

Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system using a micron gauge to remove air and moisture.

Service Valves

Open the Gas Service Valve

Instructions on how to safely open the gas service valve.

Open the Liquid Service Valve

Detailed procedure and safety warning for opening the liquid service valve.

Electrical - Low Voltage

Low Voltage Maximum Wire Length

Table specifying maximum wire lengths for low voltage wiring based on gauge.

Low Voltage Hook-up Diagrams

Wiring diagrams for connecting thermostats and air handlers to outdoor units.

Electrical - High Voltage

High Voltage Power Supply

Guidelines for connecting the high voltage power supply, referencing nameplate and codes.

High Voltage Disconnect Switch

Requirement to install a separate disconnect switch for high voltage connections.

High Voltage Ground

Instructions for grounding the outdoor unit according to codes.

Start Up

System Start Up

Step-by-step guide for initiating the system after installation is complete.

System Charge Adjustment

Temperature Measurements

Instructions on measuring outdoor and indoor temperatures for charging.

Subcooling Charging in Cooling

Detailed procedure for subcooling charging in cooling mode.

Checkout Procedures

Operational And Checkout Procedures

Lists final inspection and operational checks to ensure proper system performance.