EasyManua.ls Logo

CLEAN BURN CB-2500 - User Manual

Default Icon
142 pages
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
CLEAN BURN MODELS: CB-1750, CB-2500, and CB-3250
MULTI-OIL FURNACES
with CB-525-S2 BURNER
PUBLICATION DATE: 05/12/14, Rev. 14 CLEAN BURN PART # 43195
IMPORTANT FOR U.S. INSTALLATIONS: All installations must be made in accordance with state and local codes
which may differ from the information provided in this manual. Save these instructions for reference.
IMPORTANT FOR CANADIAN INSTALLATIONS: These instructions have been reviewed and accepted by
Underwriters' Laboratories of Canada as being appropriate for the installation of the ULC labelled products
identied herein. The use of these instructions for the installation of products NOT bearing the ULC label and
NOT identied herein may result in an unacceptable or hazardous installation.
IMPORTANT FOR CANADIAN INSTALLATIONS: The installation of this equipment is to be accomplished by
qualied personnel and in accordance with the regulation of authorities having jurisdiction and CSA Standard B 139,
Installation Code for Oil Burning Equipment.
WARNING: DO NOT assemble, install, operate, or maintain this equipment without rst
reading and understanding the information provided in this manual. Installation and
service must be accomplished by qualied personnel. Failure to follow all safety precautions
and procedures as stated in this manual may result in property damage, serious personal injury
or death.
OPERATOR'S MANUAL
IN THE VICINITY OF THIS OR ANY APPLIANCE !!
OR OTHER FLAMMABLE VAPORS AND LIQUIDS
DO NOT STORE GASOLINE
FOR YOUR SAFETY -
ENERGY SYSTEMS
www.cleanburn.com
I88435-D
USED-OIL BURNING
APPLIANCE
USED OIL-FIRED
FURNACE
LISTED
#MH15393 (N)

Table of Contents

Questions and Answers

  • K
    Kellie BrownAug 22, 2025
    Why CLEAN BURN Furnace pump will not prime but the motor is running?
    • J
      Jennifer SosaAug 22, 2025
      If the CLEAN BURN Furnace pump will not prime but the pump motor is running, the possible causes are: * Leaks in the suction line. * Improper pump installation. * Dry pump gears. * Damaged pump seal. * Closed ball valve. * Dirty canister filter. * Dirty check valve. * Damaged or worn-out pump. Solutions include ensuring the suction line is airtight, filling the pump head with oil before starting, filling the oil line and priming the pump, replacing the pump or seal if damaged, opening the ball valve, and cleaning the canister filter and check valve. If these steps don't work, the pump may need replacement.
  • D
    David MartinezAug 26, 2025
    How to fix CLEAN BURN CB-2500 Furnace when burner won’t run and power light is off?
    • L
      Lonnie MyersAug 26, 2025
      If the CLEAN BURN Furnace burner won’t run at all and the green power light is NOT ON, check the following: 1. Circuit breaker/main switch open. 2. Blown fuse/breaker. 3. Damaged or improperly plugged-in burner cable. To solve this, close the circuit breaker/switch, have an electrician check the electrical system, and inspect the burner cable.
  • P
    Patrick RyanSep 2, 2025
    Why does my CLEAN BURN CB-2500 Furnace burner shut off on reset periodically?
    • M
      Matthew FaulknerSep 2, 2025
      If your CLEAN BURN Furnace burner ignites and runs, but shuts off on reset periodically, such as overnight, consider these potential causes: * Air may be entering the suction oil line due to leaks at the fittings. Perform a vacuum test on the pump as described in Section 5. Re-install and properly seal the suction line fittings to prevent air leaks. * Air may be trapped in a high point in the pressure oil line. Follow the instructions in Section 4 to bleed the air out of the pressure oil line.
  • C
    Carlos GarciaSep 4, 2025
    How to fix a CLEAN BURN CB-2500 when the burner won’t run and the green power light is off?
    • T
      Travis BishopSep 4, 2025
      If the CLEAN BURN Furnace burner won’t run and the green power light is not on, it could be due to: * An open circuit breaker or main switch. Close the circuit breaker or switch. * A blown fuse or breaker. An electrician should check the electrical system. * A damaged or improperly plugged-in burner cable. Check the burner cable.
  • K
    Kelly StricklandSep 6, 2025
    What to do if the CLEAN BURN CB-2500 blower motor will not run?
    • C
      Carol GarnerSep 6, 2025
      If the CLEAN BURN Furnace blower motor will not run: * Check the blower motor wiring. If it's not wired correctly, refer to the wiring diagram and ladder schematic in Appendix B. Follow the directions in Section 6 to test for proper fan operation. If the fan still does not operate, shut OFF power to the furnace and call your Clean Burn dealer for service. * The blower or fan switch may be defective and need to be replaced. * The blower motor may have overheated and shut down on thermal reset. Check the voltage and amperage draw of the blower motor, and call your dealer if the problem continues.
  • T
    Taylor ClarkSep 8, 2025
    Why does the CLEAN BURN Furnace blower motor run all the time?
    • G
      Gregory ShawSep 8, 2025
      If the CLEAN BURN Furnace blower motor runs all the time, the blower motor circuit may be wired incorrectly. Refer to the wiring diagram and ladder schematic in Appendix B to troubleshoot the blower motor circuit.
  • M
    Michael HallSep 10, 2025
    What to do if CLEAN BURN Furnace burner ignites, but will not stay running?
    • D
      deborah84Sep 10, 2025
      If the CLEAN BURN Furnace burner ignites but shuts off on reset within 15 seconds, it could be due to several reasons: * A fuel delivery problem. * A dirty cad cell. * Loose cad cell wires. * Damaged cad cell/cad cell wires. * The primary control not receiving the proper ohm signal from the cad cell. Possible solutions include cleaning or replacing the cad cell and wires, ensuring proper wire connections at the "F" terminals on the oil primary control, and checking the cad cell position to ensure it looks straight through the central hole in the retention head. Also, verify the position of the retention head.
  • B
    Bruce MitchellSep 12, 2025
    What to do if CLEAN BURN Furnace burner ignites and shuts off later?
    • L
      Lynn HallSep 12, 2025
      If the CLEAN BURN Furnace burner ignites and then shuts off on reset sometime later, it could be due to: * Air in the fuel supply. * The primary control not receiving the proper ohm signal from the cad cell. * Insufficient air pressure. * A cold heater block. * Fouled electrodes. To address this, prime the pump, check for a proper ohm signal, adjust the air regulator for proper air pressure, ensure the heater block remains hot by not shutting off power to the furnace overnight (instead, turn the wall thermostat to OFF), and clean the electrodes and retention head if oil residues have built up.
  • R
    rebeccaclarkSep 13, 2025
    What to do if CLEAN BURN Furnace burner won’t run but the power light is on?
    • J
      jeremy58Sep 14, 2025
      If the CLEAN BURN Furnace burner won’t run at all and the green power light is ON, the possible causes are: 1. Oil primary control has shut down on safety reset. 2. Wall thermostat is not operating. 3. Heater block is not heating up. 4. F-120 proving switch has not closed. 5. Oil primary control terminals are not wired correctly. 6. Oil primary control is damaged. 7. The L-200 or L-290 limit switches have opened. To troubleshoot, reset the oil primary control, check the wall thermostat and cable, ensure the heater block is hot, check the F-120 proving switch for power, verify the oil primary control wiring, and replace the oil primary control if necessary. Also, test the limit switch for power.
  • T
    troy27Sep 15, 2025
    Why does my CLEAN BURN Furnace blower motor run all the time?
    • W
      Wendy MooreSep 16, 2025
      If the CLEAN BURN Furnace blower motor runs all the time, it could be due to: 1. Incorrectly wired blower motor circuit. 2. For CB-2500/3250 models only: a blower relay stuck in the closed position. To troubleshoot, refer to the wiring diagram and ladder schematic to check the blower circuit. Also, test the blower motor contactor and replace it if it does not open when the power is turned OFF.

Summary

Introduction to the Clean Burn Furnace Manual

Critical Safety Warning: Read Manual First

Emphasizes reading and understanding the manual before installation or operation.

General Safety Information and Precautions

Fire and Explosion Hazard Warnings

Specific warnings about flammable liquids, vapors, and hazardous materials.

Important Safety Warnings and Compliance

Installation Compliance: US & Canadian Standards

Lists US national/local codes and CSA standards for installation and maintenance.

Furnace Usage Guidelines and Regulations

Used Oil Tank Installation Safety

Used Oil Tank Installation Requirements

Mandates compliance with codes, UL standards, and tank size requirements.

Furnace Cabinet Safety Label Details

Hazardous Voltage Safety Warning

Warning about electrical shock hazards and precautions before servicing.

Fire and Burn Hazard Warnings

Precautions regarding clearances, fuel types, and hot gases during operation.

Entanglement Hazard Safety Warning

Safety advice regarding blower operation and guards to prevent injury.

SECTION 2: UNPACKING

SECTION 3: FURNACE ASSEMBLY

Installing CB-1750 and CB-2500 Blower Assembly

Installing Blower Safety Guards

Emphasizes the importance of installing blower guards for safe operation.

Installing the CB-3250 Blower Assembly

Wiring the CB-3250 Blower Motor

Instructions for wiring the CB-3250 blower motor based on voltage supply.

Determining the Air Discharge Configuration

Installing the Energy Retention Disc

Installing the Burner Assembly

Mounting the Burner on the Hinge Bracket

Installing Connector Block and Oil Lines

Locking the Burner into Firing Position

SECTION 4: FURNACE INSTALLATION

Installation Compliance Warnings

Critical warnings regarding qualified personnel, codes, and standards for installation.

Selecting a Furnace Location

Clearances from Combustibles

Minimum required clearances from combustible surfaces for safe installation.

Mounting the Furnace

Platform and Floor Mounting Options

Floor Mounting and Non-Combustible Floor Construction

Steps for constructing a non-combustible floor and floor mounting the furnace.

Oil Tank Installation Specifications

Tank Installation Standards and Codes

Mandates compliance with codes, UL standards, and tank size requirements.

Installing the Metering Pump

Wiring the Furnace and Metering Pump

Wiring the Furnace Electrical Connections

Steps for connecting the dedicated electrical circuit to the furnace junction boxes.

Wiring the Metering Pump Circuit

Critical warnings and instructions for wiring the pump's circuit from the furnace.

Installing Suction Oil Line Components

Suction Oil Line Specifications and Requirements

Critical specifications for suction line installation, including lift and airtightness.

Installing Pressure Relief Oil Line

Installing the Compressed Air Line

Compressed Air Line Requirements

Minimum requirements for air pressure, water traps, and regulators for the air line.

Installing the Furnace Stack

Stack Design and Specification Details

Details on stack size, height, horizontal runs, and turn limitations for optimal draft.

Installing the Interior Stack Components

Installing the Barometric Damper

Steps for installing the barometric damper in the stack tee for draft control.

Installing Stack Safety Switch for Canadian Installations

Installing the Optional Draft Inducer

Installing the Wall Thermostat

SECTION 5: METERING PUMP PRIMING

Priming the Metering Pump Steps

Metering Pump Priming Precautions

Emphasizes precision and avoiding dry running to prevent pump damage.

Vacuum Testing the Oil Pump

Purpose of Vacuum Testing the Oil Pump

Explains what vacuum testing determines regarding pump condition and fitting airtightness.

Vacuum Test Procedure Steps

Step-by-step instructions for performing the vacuum test on the oil pump system.

SECTION 6: STARTING AND ADJUSTING THE BURNER

Preparing the Burner for Startup

Initial steps before starting the burner, including thermostat and preheater checks.

Starting and Adjusting the Burner

Adjusting the Air Regulator

How to adjust the air regulator clockwise for proper operating air pressure.

Observing Flame Length and Adjustment

Guidance on visually inspecting flame length and potential adjustments.

Fine-Tuning Combustion Air and Smokeless Burn

Fine Tuning Combustion Air Band

Adjusting the air band for optimal flame characteristics (yellow-white, sharp tips).

SECTION 7: RESETTING THE FURNACE AND BURNER

Resetting the Oil Primary Control

Steps to safely reset the oil primary control after a flame-out lockout.

Hi-Temp Limit Switches Function

SECTION 8: ADJUSTING THE DRAFT OVERFIRE

Checking for Correct Draft Overfire

How to check draft overfire using a draft gauge and the importance of proper draft.

Adjusting the Barometric Damper

Barometric Damper Adjustment Procedure

Steps to adjust the weight on the damper to achieve a consistent draft reading.

Solving Draft Overfire Problems

Effect of Exhaust Fans on Furnace Draft

Checking Draft for Backdraft Severity

Procedure to determine backdraft severity caused by exhaust fans.

Installing a Make-up Air Louver

SECTION 9: MAINTENANCE

Periodic Burner Inspection

Cleaning the Canister Filter

Servicing the Metering Pump

Cleaning Check Valve and Screen

Cleaning the Oil Supply Tank

Cleaning Ash from the Furnace

Cleaning Ash from Stack and Combustion Chamber

Annual Burner Tune-up

SECTION 10: TROUBLESHOOTING

Troubleshooting: Burner Not Running

Burner Wont Run, No Power Issue

Addresses issues when the burner won't run and the green power light is off.

Burner Wont Run, Power On Issue

Addresses issues when the burner won't run but the green power light is on.

Troubleshooting: Burner Shutdowns

Burner Shuts Off Within 15 Seconds

Diagnoses and resolves issues where the burner shuts off shortly after ignition.

Troubleshooting: Burner Resets

Troubleshooting: Pump Priming Issues

Pump Will Not Prime, Motor Running Issue

Diagnoses and resolves issues when the pump motor runs but the pump won't prime.

Troubleshooting: Pump and Blower Issues

Pump Will Not Prime, Motor Not Running Issue

Addresses issues when the pump will not prime and the motor is not running.

Burner Components (continued)

Understanding the Oil Primary Control

Installing and Wiring the Primary Control

Warnings and steps for wiring the primary control, including safety precautions.

Troubleshooting the Oil Primary Control

Burner Control Not Starting Issues

Troubleshooting steps when the burner control will not start or shows lockout.

CLEAN BURN CB-2500 Specifications

General IconGeneral
BrandCLEAN BURN
ModelCB-2500
CategoryFurnace
LanguageEnglish

Related product manuals