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American Standard
Air Conditioner
21 Series
American Standard 21 Series User Manual
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Models :
4TXM21
18A12N0A
4TXM2124A13N0A
4TXM2130A14N0A
4TXM2136A14N0A
4TXM2142A15N0A
Installer's Guide
Split System (R-410A)
21 Series Multi-Zone
Inverter System
18,000 Btu/h to 42,000 Btu/h
January 2023
MS-SVN085A-EN
2
Table of Contents
Table of Contents
4
Safety Precautions
5
Pre-Installation Checklist
6
Product Introduction
7
Ductless Multi-Split Approved Combinations
8
Operating Temperature Ranges
9
Preparation for Installation
10
Selecting the Installation Location
10
Installing the Outdoor Unit
11
Condensate Management of the Outdoor Unit
11
Refrigerant Piping between the Indoor and Outdoor Units
11
Refrigeration and Condensate Piping Tips
13
Connection Pipe Requirements
14
Refrigerant Piping Precautions
14
Nitrogen Purging While Brazing
14
Installing the Refrigerant Piping
16
Insulating the Refrigeration Piping and Connections
16
Refrigerant Piping between the Indoor and Outdoor Units
17
Vacuum and Refrigerant Leakage Detection
19
Wiring Precautions
20
Outdoor Wiring Connections
20
Stranded Wiring Connections
21
Electrical Connections
22
Post Installation Checklist
23
Refrigerant System Diagrams
24
Electrical Connections at the Outdoor Unit
25
Wiring Diagrams
26
Dimensional Diagrams
29
Troubleshooting
31
Error Codes
32
Maintenance
33
List of Resistance for Temperature Sensor
34
Parts Replacement
37
After-Sales Service
37
4
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American Standard 21 Series Specifications
General
SEER Rating
Up to 21
Refrigerant
R-410A
Model
21 Series
Type
Air Conditioner
Cooling Capacity
1.5 - 5 Ton
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