American Standard S9X1 User Manual

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Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning
equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person
could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment.
September 2020
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Upflow/Horizontal and Dedicated Downflow
Gas-Fired, Direct/Non-Direct Vent, Single Stage / Two Stage
Condensing Furnaces with High Efficiency Motor
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S9X1
S9X2
S9B1
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only. Actual model may differ in appearance.
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CAUTION
!
COIL REQUIREMENT!
Failure to follow this Caution could result in property damage or personal injury. 4GXC* and
4MXC* coils installed on upflow furnaces in vertical, horizontal left, or horizontal right
orientations without a factory installed metal drain pan shield must use a MAY*FERCOLKITAA
kit. Coils installed on upflow furnaces must have drain pans that are suitable for 400° F
(205°C) or have a metal drain pan shield. Downflow furnaces do not require a metal drain pan
shield or the use of the MAY*FERCOLKITAA kit. See Installer’s Guide for more information.
18-CE12D1-1D-EN
Installer’s Guide

American Standard S9X1 Specifications

General

Model	S9X1
Type	Gas Furnace
Heating Capacity	40, 000 to 120, 000 BTU/h
Fuel Type	Natural Gas or Propane
Heat Exchanger	Stainless Steel
Input BTU/h	40, 000 to 120, 000
AFUE	Up to 96%
Warranty	Lifetime Heat Exchanger, 10-year Parts

Summary

Safety Warnings

Fire and Explosion Hazards

Covers warnings related to fire and explosion risks during installation and operation.

Electrical Shock Hazards

Details warnings about electrical shock risks and proper servicing procedures.

Carbon Monoxide Hazards

Highlights dangers of carbon monoxide poisoning and proper venting requirements.

Furnace Installation Guidelines

Safety Practices and Precautions

Essential safety practices and precautions for furnace installation and servicing.

Locations and Clearances

Specifies required clearances and location considerations for furnace installation.

Furnace General Installation Procedures

Gas Piping

Instructions for gas piping connections, including default configurations and tables.

Combustion and Input Check

Procedures for checking combustion and input rates using gas flow tables.

Gas Valve Adjustment

Step-by-step guide for adjusting manifold pressure on the gas valve.

General Venting Requirements

Instructions for proper venting, including direct and non-direct vent systems.

Downward Venting and Air Supply

Covers downward venting and requirements for combustion and ventilation air.

Electrical Connections

Field Wiring Diagrams

Wiring diagrams for S9B1, S9X1, and S9X2 furnaces with thermostats.

General Start-up and Adjustment

Control and Safety Switch Adjustment

Guidance on checking and adjusting limit switches and safety controls.

Furnace Combustion Air Exhaust Options

Upflow Position Venting

Instructions for venting combustion air in upflow positions (top and side).

Horizontal Position Venting

Downflow Position Venting

Integrated Furnace Control Menu

Control Menu Navigation

Diagrams and explanations for navigating the IFC menu for S9X1/S9B1 and S9X2 models.

System Setup and Modes

Integrated Furnace Control Display Codes

Menu Options and Error Codes

Fault Code Recovery and Defaults

Sequence of Operation

Gas Heating Sequences

Detailed sequence of operation for 1st and 2nd stage gas heating.

Cooling and Heat Pump Sequences

Operational sequences for single and two-stage cooling and heat pump modes.