Trane S8X1 Series 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.
January 2019
1188--CCEE0044DD11--11BB--EENN
Upflow/Downflow/Horizontal
Gas-Fired, 1–Stage and 2–Stage Induced Draft
Furnaces with High Efficiency Motor
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Single Stage
S8X1A026M2PSAA
S8X1A040M3PSAA
S8X1B040M2PSAA
S8X1B060M3PSAA
S8X1B060M4PSAA
S8X1B080M4PSAA
S8X1C080M5PSAA
S8X1C100M5PSAA
S8X1D120M5PSAA
Two Stage
S8X2A040M3PSAA
S8X2B060M3PSAA
S8X2B060M4PSAA
S8X2B080M4PSAA
S8X2C080M5PSAA
S8X2C100M5PSAA
S8X2D120M5PSAA
S8X1
S8X2
NNoottee:: This installer’s Guide is used for multiple furnace families. Models
may have a “T” in the 12th digit designating they meet California less
than 40 ng/J (NOx) emissions requirements.
NNoottee:: Graphics in this document are for
representation only. Actual model may
differ in appearance.
18-CE04D1-1A-EN
Installer’s Guide

Trane S8X1 Series Specifications

General

Blower Motor	Multi-speed
Ignition System	Hot Surface Ignition
Fuel Type	Natural Gas or Propane
Heating Stages	Single-stage
Warranty	20-Year heat exchanger warranty, 5-Year parts warranty (with registration, warranty extends to 10-year parts warranty)

Summary

Safety Section Non-Condensing Furnaces

Fire, Explosion, and Electrical Hazards

Covers warnings about ignition, fuel leaks, electrical shock, and improper servicing.

Carbon Monoxide Poisoning Hazards

Details risks of poisoning from improper venting and emphasizes correct installation.

Installation and Gas Safety Precautions

Installation on Combustibles and Chemical Exposure

Addresses installation on combustible materials and chemical exposure risks (Prop 65).

Gas Leak Detection and Manual Lighting

Venting, Electrical, and System Safety

Venting, Chimney, and Electrical Precautions

Discusses venting requirements, disconnect switch usage, and overheating hazards.

Flammable Storage and System Safety

Furnace Installation Guidelines

Safety Practices and Precautions

Outlines essential safety practices and precautions to follow during installation and servicing.

General Installation Guidelines

Locations and Clearances

Clearances to Combustible Materials

Specifies required clearances to combustible materials for furnace installation.

Furnace General Installation

Gas Piping Installation

Upflow and Downflow Gas Piping

Details gas piping configurations for upflow and downflow orientations.

Horizontal Gas Piping Configurations

Horizontal Left and Right Gas Piping

Illustrates gas piping setups for horizontal left and right orientations.

Combustion and Input Check Procedures

Performing Combustion and Input Checks

Explains how to perform combustion and input checks using gas flow tables.

Gas Valve Adjustment Procedure

Adjusting Manifold Pressure

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

High Altitude Derate and Orifice Selection

Altitude Derate and Orifice Selection

Details how to derate input for high altitudes and select replacement orifices.

General Venting Requirements

Venting into Masonry Chimneys

Air for Combustion and Ventilation

Unconfined Space Airflow Requirements

Confined Space Air Requirements

Confined Space Ventilation Air

Electrical Connections

Field Wiring Diagrams

Illustrates field wiring diagrams for single and two-stage heating thermostats.

Twinning Wiring Diagrams

Twinning Connection Diagram (2 Stage Heat / 1 Stage Cool)

Twinning Connection Diagram (2 Stage Heat / 2 Stage Cool)

Twinning Connection Diagram (with Transformer)

Twinning Diagram for Single Stage Thermostat

General Start-up and Adjustment

Preliminary Inspections

Lighting Instructions

Control and Safety Switch Adjustment

Furnace Combustion Air Exhaust Options

Upflow Venting Options

Combustion Air Conversions

Upflow Orientation Venting Conversions

Horizontal Venting Conversions

Horizontal Right and Downflow Venting Conversions

Downflow Venting Conversions

Integrated Furnace Control Menu

Setting Up Your System

Guides on changing factory default values for furnace settings.

S8X1 Control System Menu Two Stage OD

Details menu options for two-stage operation including setup and fan speed selection.

S8X2 Control System Menu Single Stage OD

Details menu options for single-stage operation including setup and fan speed selection.

S8X2 Control System Menu Two Stage OD

Details menu options for two-stage operation including setup and fan speed selection.

Clearing Last 6 Faults

Selecting Cooling/HP Fan Speeds

Selecting Gas Heating Fan Speeds

System Status Menu

Status Indicators and Modes

Explains system status indicators, modes, and error code display.

Setting Airflow

Furnace Airflow vs. External Static Pressure Tables

Provides tables relating furnace airflow (CFM) to external static pressure (ESP).

Airflow Adjustment Examples

Integrated Furnace Control Display Codes

Menu Options Explained

Lists and explains the various menu options available on the furnace control.

Error Codes and Explanations

Lists and explains alarm error codes for furnace diagnostics.

Fault Code Recovery and Resetting Defaults

Fault Code Recovery Procedures

Provides procedures for viewing, clearing faults, and resetting furnace to factory defaults.

Sequence of Operation S8X1/S8X2

1st Stage Gas Heating Sequence

Details the step-by-step sequence for 1st stage gas heating operation.

2nd Stage Gas Heating Sequence (S8X2 Only)

Outlines the sequence of operation for 2nd stage gas heating in S8X2 models.

Sequence of Operation

Single Stage Cooling Sequence

Two Stage Cooling Sequence

Single Stage Heat Pump Sequence

Two Stage Heat Pump Sequence