REZNOR USED-OIL-FIRED HEATERS AND BOILERS - Installation/Operation/Maintenance Manual and Reference Guide

Oct 25, 2026

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Installation/Operation/Maintenance manual for REZNOR used-oil-fired heaters and boilers, covering models RA 150, RA 250, RAD 150, and RAD 250. Provides instructions and requirements for correct draft, venting, air for combustion, fuel systems (tank, pump, supply lines), electrical/power installation, start-up procedures, and maintenance schedules. Includes safety warnings and emphasizes that improper installation or inadequate maintenance voids the warranty, with key troubleshooting and service guidance to maintain safe, efficient combustion and long-term performance.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages52

Reading Time2 h 11 min

AccessFree to download

Table of Contents

Installation

Maintenance

Service

Appendix

Index

Form I-RA/RAD 150/250 REZNOR® USED-OIL-FIRED HEATERS AND BOILERS Installation/Operation/Maintenance Manual and Reference Guide Heater Models RA 150 RA 250 RAD 150 RAD 250 CSA Certified to Electrical and Fuel Burning requirements only. Form I-RA/RAD 150/250, P/N 234817R5, Page 1 IMPORTANT Notice to Owner and Installer | To ensure the long term benefits of burning your used oil in a Reznor® Used-Oil-Fired Heater, it is necessary to become familiar with the correct installation and maintenance of your new furnace. Before installing or operating this heater, make sure you have read and understand this manual. | | --- | | IMPROPER INSTALLATION OR LACK OF MAINTENANCE WILL VOID THE WARRANTY.
The most critical sections of this manual are
• Correct Draft Over Fire-Page 21
• General Maintenance Requirements-Page 24
Identical to any gas or oil burner, without adequate draft over the fire, the combustion gases cannot escape resulting in an overheated combustion chamber. Even if the burner is installed correctly and adequate draft achieved, a flue passage blockage will affect the draft. Burning used oil is similar to burning wood. A fine gray ash accumulates in the chamber and flue passages. This accumulation of ash will eventually affect the draft. It is important to remove this ash before the draft is affected.
These topics are discussed in detail on the pages listed above. Please familiarize yourself with these sections of your manual. Spending a few minutes to review this material will assure that you receive the return on investment that you expect from your heater. | Form I-RA/RAD 150/250, Page 2 Table of Contents Installation....................4-18 Introduction.................................... 4 Use.................................................. 4 Codes and Regulations ................ 4 Warranty......................................... 4 Safety Warnings ............................ 5 Secondary Heat Source................ 5 Fuels............................................... 5 Hazardous Atmosphere................ 5 Venting ........................................... 5 Air for Combustion ....................... 6 Non-Compliance............................ 6 Unpacking and Inspection............ 6 Parts Carton................................... 7 Heater Placement .......................... 8 Minimum Clearances from Combustibles ................................ 8 High Altitude Installation .............. 9 Fuel Tank, Pump, and Supply Lines ........................... 10 Fuel Tank...................................... 10 General Requirements................ 10 Pump ............................................ 11 Supply Lines Installation............ 11 Typical Installation ...................... 12 Mounting the Heater.................... 13 Weights ........................................ 13 Suspension.................................. 13 Venting the Heater ...................... 14 Guidelines for the Vent System . 14 Detailed Vent System Information ............................ 15 Draft Regulator ............................ 16 Installing Ducts............................ 17 Inlet Air Duct ................................ 17 Discharge Duct............................ 17 Power Installation........................ 18 Heater Power ............................... 18 Pump Power Installation ............ 18 Heating Thermostat .................... 18 Heater Start-Up .......... 19-23 System Check .............................. 19 Priming and Leak Check ............ 19 Heater Start-Up ............................ 21 Start-Up Procedure ..................... 21 Check Test-After Start-up ......... 21 Maintenance...............24-33 General Maintenance Requirements .......................... 24 Maintenance Schedule ............... 24 Maintenance Procedures ............ 25 Service ....................... 3

FAQs

Why is correct installation and maintenance critical for warranty coverage?

The manual states that improper installation or lack of maintenance will void the warranty. It highlights critical areas like correct draft over the fire and general maintenance requirements.

What main installation standards must be followed?

Installation must comply with NFPA 31 and NFPA 70 in the United States, and CSA standards (B139-M91 and C22.1) in Canada, along with applicable federal, state/provincial, and municipal codes and required permits.

What factors can impair combustion and draft when burning used oil?

Even with adequate draft, flue passage blockage can affect draft. Burning used oil can lead to ash accumulation in the chamber and flue passages, which should be removed before draft is affected.

Oct 25, 2026

Upload by Tirek