Table of Contents
Advertisement
Quick Links
GAS-FIRED UNIT HEATER INSTALLATION, OPERATION,
AND MAINTENANCE
• Failure to follow safety warnings exactly could result in serious injury, death, or property
damage.
• Improper installation, adjustment, alteration, service, or maintenance can cause serious injury,
death, or property damage.
• Installation and service must be performed by a qualified installer, service agency, or the
gas supplier.
• Be sure to read and understand the installation, operation, and service instructions in this
manual.
• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
• 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 phone remote from the building. Follow the gas
supplier's 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.
MODELS UBXC AND UDXC
⚠ DANGER ⚠
FIRE OR EXPLOSION HAZARD
WHAT TO DO IF YOU SMELL GAS
Revision: UBXC-UDXC-IOM (02-24) 1042980-0
Supersedes: — (Original Version)
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Reznor UBXC-175
Summarization of Contents
General Information
Important Safety Information
Crucial safety warnings and hazard definitions for proper appliance use.
Model Configuration
Details on UBXC/UDXC models and separated-combustion options.
Installation Codes
Compliance requirements with local and national building and gas codes.
Heater Location
Guidelines for optimal unit placement and airflow management.
Clearances
Minimum safe distances to combustible materials for installation.
Heater Throw Distances
Data on air throw patterns related to mounting height and louvers.
Dimensions
Physical dimensions and measurement data for unit models.
Combustion Air Requirements
Essential guidelines for providing adequate combustion and ventilation air.
Installation
Pre-Installation Checklist
Critical steps and checks before commencing unit installation.
Heater Suspension
Methods and requirements for securely mounting the heater unit.
Piping Connections
Instructions for gas supply and vent piping connections.
General Requirements for Vent Connections
Principles for venting, including condensation mitigation and sealing.
Category III Venting
Specific requirements for installing Category III vent systems.
Electrical Connections
Procedures for safe and compliant electrical wiring of the unit.
Controls
Pressure Switch
Function and settings of the pressure switch for safety and operation.
High Temperature Limit Switch
Critical safety device preventing overheating.
Circuit Board (DSI Control Module)
The central unit managing ignition, safety, and motor operations.
Operation
Pre-Startup Checklist
Essential checks to perform before initial operation.
Startup
Step-by-step guide for safely starting the unit for the first time.
Operating Sequences
Detailed sequences for normal and abnormal heating cycles.
Adjustments
Measure and Adjust Manifold (Outlet) Gas Pressure
Procedure for setting correct gas pressure for optimal burner performance.
Maintenance
Service Checklist
Recommended annual inspection and cleaning tasks for longevity.
Burner Maintenance
Cleaning and inspection procedures for the burner assembly.
Heat Exchanger Maintenance
Procedures for inspecting and cleaning the heat exchanger.
Ignition System Maintenance
Care for the DSI module, flame sensor, and ignitor.
Maintenance of Fan Motor, Fan Blades, and Fan Guard
Cleaning and inspection of the fan motor components.
Venter Wheel and Motor Assembly Maintenance
Procedures for cleaning and servicing the venter motor.
Combination Gas Valve Maintenance
Annual inspection and testing of the gas valve for proper shutoff.
Vent or Vent/Combustion Air System Maintenance
Annual inspection of the venting system for integrity and cleanliness.
Troubleshooting
General Troubleshooting
Common issues, their causes, and solutions for unit malfunctions.
Unit Troubleshooting Using DSI Control Module
Diagnostic steps using control module display codes.
Need help?
Do you have a question about the UBXC-175 and is the answer not in the manual?
Questions and answers