Trane S8B1D120M5PSBA 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.
November 2020
1188--CCEE1166DD11--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 Two Stage
S8B1
S8X1
S8X2
S8B1B080M4PSBA
S8B1D120M5PSBA
S8X1B080M4PSBA
S8X1D120M5PSBA
S8X2B080M4PSBA
S8X2D120M5PSBA
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-CE16D1-1B-EN
Installer’s Guide

Trane S8B1D120M5PSBA Specifications

General

Brand	Trane
Model	S8B1D120M5PSBA
Category	Furnace
Language	English

Summary

Accessories

Furnace Installation Guidelines

Safety Practices and Precautions

Essential safety practices and precautions for furnace installation.

General Guidelines

General recommendations for equipment installation and local code adherence.

Locations and Clearances

Guidelines for furnace placement and required clearance to combustibles.

Outline Drawings

Furnace General Installation

S-Series Furnace Panel Removal

Instructions for removing the front panel for access to furnace components.

Horizontal Installation in an Attic or Crawlspace

Guidance for installing the furnace in horizontal attic or crawlspace configurations.

Gas Piping

Diagrams and notes for connecting the gas supply to the furnace.

Combustion and Input Check

Procedure for verifying furnace input rate and combustion performance.

Gas Valve Adjustment

Steps for adjusting manifold pressure for 1st and 2nd stage gas heating.

High Altitude Derate

Procedures for adjusting input rating at higher altitudes.

General Venting

Guidelines for connecting the furnace to a venting system for exhaust.

EXTERNAL MASONRY CHIMNEY

Recommendations to minimize corrosion when venting into external masonry chimneys.

Air for Combustion and Ventilation

Requirements for providing adequate air for furnace operation.

Confined spaces

Guidelines for air supply in confined installation spaces.

Duct Connections

Instructions for connecting supply and return air ducts to the furnace.

Return Air Filters

TYPICAL AIR FILTER INSTALLATIONS

Information on filter types and sizes needed for furnace installations.

Preparation for Upflow Bottom and Side Return Air Filter Installations

Steps for preparing upflow installations for filter placement.

RETURN AIR FILTERS FOR FURNACE IN HORIZONTAL CONFIGURATION

Specific filter installation requirements for horizontal furnace setups.

Electrical Connections

Field Wiring

Diagrams for connecting thermostats and outdoor units to the furnace.

Twinning

General Start-up and Adjustment

Preliminary Inspections

Checks to perform before initial furnace startup.

Lighting Instructions

Procedures for unit startup and initial operation.

Control and Safety Switch Adjustment

Guidance on adjusting safety controls and switches for proper operation, including limit switch checks.

Furnace Combustion Air Exhaust Options

Combustion Air Conversions

Steps for changing furnace orientation for exhaust venting.

Integrated Furnace Control Menu

S8B1-S8X1 Control System Menu Single Stage OD

Overview of the control system menu for single-stage operation.

S8X1 Control System Menu Two Stage OD

Control menu structure for two-stage operation on S8X1.

S8X2 Control System Menu Single Stage OD

Control menu structure for single-stage operation on S8X2.

S8X2 Control System Menu Two Stage OD

Control menu structure for two-stage operation on S8X2.

S8B1 - S8X1 - S8X2 Run Test Mode

Guide to using the run test mode for component verification.

S8B1 - S8X1 - S8X2 System Status Menu

Explanation of system status indicators and codes.

Setting Airflow

Integrated Furnace Control Display Codes

Fault Code Recovery

Procedures for viewing, clearing, and resetting fault codes.

Sequence of Operation S8B1/S8X1/S8X2

EAC and HUM Timing

Timing sequences for EAC and HUM relays during operation.

1st Stage Gas Heating

Detailed operational steps for the first stage of gas heating.

2nd Stage Gas Heating (S8X2 Only)

Operational steps for the second stage of gas heating on S8X2 models.

Single Stage Cooling

Operational sequence for single-stage cooling mode.

Two Stage Cooling

Operational sequence for two-stage cooling mode.

Single Stage Heat Pump

Operational sequence for single-stage heat pump mode.

Two Stage Heat Pump

Operational sequence for two-stage heat pump mode.