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Oxbox J951X U Series User Manual

Oxbox J951X U Series
44 pages
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J951X*D (95.0% AFUE)
Downflow Furnace
95.0% AFUESingle Stage Condensing Gas Furnaces
J951X*U (95.0% AFUE)
Upflow / Horizontal Furnace
INSTALLATION INSTRUCTIONS
WARNING
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly could result in serious injury, death or property
damage.
Installation and service must be performed by a qualified installer, service agency or the gas
supplier.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Leave the building immediately.
Immediately call your gas supplier from a neighbors phone. Follow the gas suppliers instructions.
If you cannot reach your gas supplier, call the fire department.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

Table of Contents

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Oxbox J951X U Series Specifications

General IconGeneral
Fuel TypeNatural Gas
AFUE95%
Ignition SystemHot Surface Ignition
Heating Capacity40, 000 - 120, 000 BTU/h
Warranty10 Years Parts Limited Warranty

Summary

Safety and General Information

General Safety Warnings and Precautions

Critical safety information and warnings applicable to installation, service, and operation.

Safe Furnace Operation During Construction

Guidelines and precautions for operating the furnace during building construction phases.

Installation Requirements and Codes

Applicable Codes and General Requirements

Overview of codes and general requirements governing furnace installation, including safety.

Clearances to Combustible Materials

Specifies minimum safe distances from the furnace to surrounding combustible materials.

Garage Installation Requirements

Specific requirements for installing the furnace safely within a garage environment.

Combustion Air and Venting

Combustion Air and Venting Requirements

Essential guidelines for providing adequate combustion air and proper venting of flue gases.

Direct Vent Furnace Venting

Instructions for direct vent (2-pipe) systems, drawing air from outdoors and venting outside.

Confined Space Venting

Requirements for venting in confined spaces, defining volume and air supply needs.

Category IV Venting Requirements

Special material and installation procedures for Category IV appliances requiring sealed systems.

Furnace Installation Procedures

General Furnace Installation Requirements

Fundamental requirements for furnace installation, including leveling and protection from water.

Upflow Furnace Installation Procedures

Specific considerations for installing furnaces in the upflow configuration.

Horizontal Furnace Installation Procedures

Guidelines for installing furnaces in horizontal orientations, including attic or basement placement.

Downflow Furnace Installation Procedures

Procedures and warnings specific to installing furnaces in the downflow configuration.

Inducer and Venting Configuration Options

Flexibility in rotating the inducer assembly for various venting configurations and requirements.

Gas Supply and Electrical Wiring

Gas Supply and Piping Installation

Installation guidelines and requirements for gas supply piping, including leak testing.

High Altitude Natural Gas Application

Adjustments for natural gas furnaces installed at altitudes above 2,000 feet.

Natural Gas to Propane Conversion

Instructions and warnings for converting the furnace from natural gas to LP/Propane fuel.

Electrical Wiring and Grounding

Proper installation of line voltage, low voltage wiring, and grounding for furnace safety and operation.

Start-Up, Adjustments, and Maintenance

Pre-Start Installation Checklist

Essential checks to perform before initiating furnace start-up to ensure safety and correct installation.

Furnace Start-Up Sequence

Step-by-step instructions for safely starting the furnace after installation and checks.

Input Rate Verification and Adjustment

Procedure to measure and set the furnace's gas input rate according to rating plate specifications.

Routine Furnace Maintenance

Guidelines for air filter, burner, and vent system maintenance for optimal performance and safety.

Troubleshooting and Checklist

Furnace Troubleshooting Guide

Diagnosing and resolving common furnace operational issues using LED indicators and component checks.

Final Installation Checklist

Comprehensive checklist for electrical, gas, and venting systems before final sign-off.

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