Page 1 OPERATOR'S MANUAL CLEAN BURN MODELS: CB-1750, CB-2500, and CB-3250 MULTI-OIL FURNACES with CB-525-S2 BURNER USED-OIL BURNING APPLIANCE #MH15393 (N) FOR YOUR SAFETY - LISTED DO NOT STORE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS USED OIL-FIRED IN THE VICINITY OF THIS OR ANY APPLIANCE !!
Page 3: Warranty Information
If the defect occurs within the first ten (10 years or 15,000 hours, whichever comes first), Clean Burn will replace or repair the heat exchanger/combustion chamber.
Page 4 TRADEMARKS The Clean Burn logo is a trademark of Clean Burn, LLC. All other brand or product names mentioned are the registered trademarks or trademarks of their respective owners. COPYRIGHT Copyright ©...
Page 5: Table Of Contents
SECTION 3: FURNACE ASSEMBLY ....................3-1 Understanding Assembly ....................... 3-1 Required Tools and Materials ....................3-1 Installing the CB-1750 and CB-2500 Blower Assembly .............. 3-3 Wiring the CB-1750 and CB-2500 Blower Motor ..............3-4 Installing the CB-3250 Blower Assembly ..................3-6 Mounting the CB-3250 Blower ....................
Page 6 TABLE OF CONTENTS Preparing for Installation ....................... 4-9 Standard Mounting: Vertical Positioning ................4-9 SECTION 4: FURNACE INSTALLATION (continued) ................. Alternate Mounting: Horizontal Positioning ................4-11 Wiring the Furnace and Pump ..................... 4-12 Wiring to the Furnace ......................4-12 Wiring to the Metering Pump....................4-12 Installing the Suction Oil Line Components ................
Page 7 Burner Technical Specifications ....................A-2 Furnace Dimensions ........................A-2 Burner Components ........................A-4 Removing the Nozzle for cleaning ..................A-9 CB-1750 Furnace Components ....................A-10 CB-1750 Blower Components ....................A-12 CB-2500 Furnace Components ....................A-14 CB-2500 Blower Components ....................A-16 CB-3250 Furnace Components ....................
Page 8 TABLE OF CONTENTS APPENDIX C Furnace Service Record .........................C-1...
Page 9: Section 1: Introduction
This manual contains all the information necessary to safely install and operate the Clean Burn Furnace Models CB-1750, CB-2500 and CB-3250. Consult the Table of Contents for a detailed list of topics covered. You'll find this manual's step-by-step procedures easy to follow and understand. Should ques- tions arise, please contact your Clean Burn dealer before starting any of the procedures in this manual.
Page 10: For Your Safety
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 For Your Safety... For your safety, Clean Burn documentation contains the following types of safety statements (listed here in order of increasing intensity): • NOTE: A clarification of previous information or additional pertinent information.
Page 11 Clean Burn, LLC. Unauthorized modifications or alteration can adversely affect the proper, safe operation of your furnace. WARNING: The burner which is shipped with your Clean Burn furnace is to be used only with your furnace according to the instructions provided in this manual. DO NOT use the...
Page 12: Guidelines For Furnace Usage
Contact your Clean Burn dealer for current EPA regulations. • If your furnace ever requires service, call your Clean Burn dealer. DO NOT allow untrained, unauthorized personnel to service your furnace. Make sure that your furnace receives annual preventative maintenance to ensure optimal performance.
Page 13: Guidelines For Used Oil Tanks
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 For Your Safety... (continued) WARNING Guidelines for Used Oil Tanks For the safe storage of used oil and the safety of persons in the vicinity of the used oil supply tank, ensure that your tank installation adheres to the...
Page 14: Safety Labels
If any labels on your Clean Burn furnace ever become worn, lost or painted over, please call your Clean Burn dealer for free replacements.
Page 15 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 For Your Safety... (continued) Furnace Cabinet Safety Labels WARNING WARNING Fire, explosion and burn hazards: Hazardous voltage. Maintain clearances from To prevent serious injury, shut OFF main combustibles as listed on unit. power to unit before removing cover.
Page 16 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 For Your Safety... (continued) Furnace Cabinet Safety Labels MODEL NO. CB-1750 MODEL NO. CB-2501 INPUT RATING W/NO 2 FUEL OIL (BTU/HR) 170000 INPUT RATING W/NO 2 FUEL OIL (BTU/HR) 250000 ATOM AIR ATOM AIR...
Page 17 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 For Your Safety... (continued) Furnace Cabinet Safety Labels MODEL NO. CB-3250 INPUT RATING W/NO 2 FUEL OIL (BTU/HR) 300000 ATOM AIR LISTED FUELS INPUT INPUT PRESSURE PRESSURE - GPH - - GPH -...
Page 18 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 For Your Safety... (continued) 525 BURNER CB-525-S2 Burner Labels Label 42005 Part # Description 42005 Sold and Serviced By Label 42235 42004 Burner Safety Warning Label 42004 (High Voltage/Moving Parts Hazards) 42000 Burner Safety Warning Label...
Page 19: Section 2: Unpacking
Unpacking and Inspecting All Components Following is an itemized list of all components you should have received in your Clean Burn furnace shipment. Open all shipping containers and inspect all components according to the list. Immediately notify the freight company and your Clean Burn dealer in case of shipping damage or shortage(s).
Page 20: Unpacking Items Packed Inside The Furnace
I88436-A Figure 2A - Accessing the Combustion Chamber Warranty Registration For proper warranty registration, Clean Burn requires that you fill out the provided warranty registration card and return it within 30 days to: CLEAN BURN WARRANTY REGISTRATION Clean Burn, LLC.
Page 21: Section 3: Furnace Assembly
(4) Installing the Burner (5) Installing the Connector Block, Oil Line Tubing, and Air Line Tubing Clean Burn recommends that you review all assembly procedures before proceeding, paying careful attention to safety information statements. Figure 3A on the following page provides a general overview of the furnace components and their proper assembly.
Page 22 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 "ALL THREAD" RODS COUPLINGS FOR "ALL THREAD" RODS PUMP PRIMING JUNCTION SWITCH BURNER CABLE BURNER MOUNTING BRACKET R.H. FURNACE BREECH THROAT FURNACE DOOR LH FURNACE BREECH WITH CLEAN-OUT NOTE: LOOP ON ENERGY RETENTION...
Page 23: Installing The Cb-1750 And Cb-2500 Blower Assembly
Remove the blower stabilizer brackets as shown in Figure 3B. (These braces, which are installed at the factory, are designed to keep the blower in proper position during shipping. Note that these braces are provided on CB-2500 blower assemblies ONLY; CB-1750 blower assemblies do not require these special shipping braces.) Position the blower over the opening in the back of the furnace cabinet by sliding the blower into the mounting angle brackets.
Page 24: Wiring The Cb-1750 And Cb-2500 Blower Motor
I88438-D Figure 3C - Blower Installed on Furnace Cabinet (CB-1750 and CB-2500) Wiring the CB-1750 and CB-2500 Blower Motor WARNING: Make sure the main power to the furnace is turned OFF before wiring the blower motor.
Page 25 Installing the CB-1750 and CB-2500 Blower Assembly (continued) REAR JUNCTION WHITE WHITE BLACK BLACK BLOWER MOTOR POWER IN (FLEX CONDUIT) I42425 Figure 3D - Detail of Blower Motor Wiring for CB-1750 REAR JUNCTION WHITE SPADE (MALE TO FEMALE) WHITE BLOWER (UNDER LUG SCREW) MOTOR POWER BLACK...
Page 26: Installing The Cb-3250 Blower Assembly
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the CB-3250 Blower Assembly Mounting the CB-3250 Blower Refer to Figures 3F and 3G. Position the blower over the opening in the back of the furnace cabinet by sliding the blower into the mounting angle brackets.
Page 27 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 BLOWER ASSEMBLY PARTS LIST MOTOR (4) 1 MOTOR PULLEY SHEAVE BUSHING 7/8” MOTOR MOUNTING PLATE BOLT SQUARE HEAD BOLT BLOWER GUARD MOTOR MOUNTING BRACKET 10 BLOWER 11 MOTOR TENSIONING BRACKET 12 SELF TAPPING SCREW 13 BLOWER PULLEY 14 SHEAVE BUSHING 1"...
Page 28 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the CB-3250 Blower Assembly (continued) I89021 Figure 3G - Blower Installed on Furnace Cabinet (CB-3250) Installing the CB-3250 Motor Pulley, Blower Pulley, and V-Belt Review the contents of the Blower Pulley and Motor Pulley as shown in Figure 3F.
Page 29 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 GROUND 115 VOLTS AC COMMON / NEUTRAL VOLTS HOT LEG WHITE FLEX BLACK CONDUIT ORANGE BLOWER MOTOR CONTACTOR HAS A 110 - 120 VOLT AC COIL CONNECT 2 HP BLOWER MOTOR ACCORDING TO THE LABEL SUPPLIED WITH...
Page 30: Determining The Air Discharge Configuration
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the CB-3250 Motor Pulley, Blower Pulley, and V-Belt (continued) Align the motor pulley with the blower pulley. a. Place the blower bushing ½ inch from the end of the shaft and tighten the capscrews securely (9 Ft.
Page 31 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Determining the Air Discharge Configuration (continued) Static Pressure (SP) and Air Flow (CFM) Specifications CB-1750 Air Discharge Louvers Air Discharge Louvers Mounted on Furnace Air Discharge Louvers Removed Mounted on Furnace (Fully Open - Ductwork Installed Over Top)*...
Page 32: Installing The Hot Air Discharge Components
• For ducting applications of .30 (CB-1750) or .40 (CB-2500 and CB-3250) static pressure, DO NOT install the louvers. The ductwork should be installed directly over the desired air discharge openings on the side of the furnace cabinet.
Page 33 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Hot Air Discharge Components (continued) Adjust the louvers for the desired air flow direction. ATTENTION: DO NOT restrict the flow of the hot air from the furnace by closing the louvers, or the furnace will not operate properly.
Page 34: Installing The Energy Retention Disc
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Energy Retention Disc Installing the Energy Retention Disc at the Back of the Combustion Chamber ATTENTION: DO NOT fire your furnace without the Energy Retention Disc in place, or combustion chamber damage will occur. Handle the Energy Retention Disc carefully to avoid damaging it.
Page 35: Installing The Burner
Checking the Burner Nozzle and Electrodes NOTE: The burner nozzle is factory installed. All furnace models (CB-1750, CB-2500, and CB-3250) use a Delavan 9-5 nozzle. The nozzle size is indicated on the nozzle as shown in Figure 3K. Refer also to Appendix A at the back of the manual for additional specifications/instructions on the burner nozzle.
Page 36: Mounting The Burner On The Hinge Bracket
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Burner (continued) Mounting the Burner on the Hinge Bracket ATTENTION: Burner tube components (e.g. electrodes and retention head) are factory set. Handle the burner with extreme care so that burner components are not damaged.
Page 37: Installing The Connector Block, Oil Line Tubing, And Air Line Tubing
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Connector Block, Oil Line Tubing, and Air Line Tubing ATTENTION: DO NOT use teflon tape on any fittings. Teflon tape residues will plug vital burner components and void your warranty. OIL LINE...
Page 38: Installing The Air Line Tubing
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Connector Block, Oil Line Tubing, and Air Line Tubing (continued) Installing the Oil Line Tubing (continued) Make sure that the curl in the oil line is positioned as shown in Figure 3L so that the burner can swing open correctly.
Page 39: Locking The Burner Into Firing Position
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Locking the Burner into Firing Position Swing the burner into firing position. Install and tighten the lock-down nut on the mounting plate bolt to secure the burner in its firing position. Plug the burner electrical cable into the receptacle on the CONNECTOR PLUG top of the burner housing.
Page 40 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 3-20...
Page 41: Section 4: Furnace Installation
Clean Burn Operator's Manual and with all national, state, and local codes or authorities having jurisdiction over environmental control, building inspection and fuel, fire and electrical safety and the...
Page 42 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 WARNING: When installing your furnace, adhere to the minimum clearances from combustible surfaces as stated in Section 4. These clearances also provide adequate space for servicing. Failure to maintain proper clearances may result in fire, explosion, personal injury, or death.
Page 43: Selecting A Location
CLEARANCES FOR UNIT HEATER INSTALLATION WITH MINIMUM DISTANCES SIDE AIR DISCHARGE CB-140 / CB-1750 / CB-2500 / CB-3250 FURNACES REAR 2" • TOP (of furnace) ......12"...
Page 44: Mounting The Furnace
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Mounting the Furnace After selecting a safe and appropriate location for your furnace, construct the mounting system as required by the location and the following specifications. Ceiling Mounting WARNING: To prevent serious personal injury, ensure that your furnace mounting system can safely bear the suspended weight of the furnace and allow safe servicing of furnace components.
Page 45: Raised Platform Mounting
Add 12" (minimum) to all sides of the cabinet to achieve the total measurement for the non-combustible floor. EXAMPLE: The CB-1750 measures 55" long x 27" wide. 55" + 12" + 12" = 79" long 27" + 12" + 12" = 51" wide Refer to Figure 4E.
Page 46 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Constructing a Non-Combustible Floor (continued) Place a sheet of 24-gauge (minimum) galvanized sheet metal on top of the 5/8" sheet rock; the sheet metal must cover the sheet rock completely. Place 4" thick (minimum) hollow masonry block, end to end, on top of the 24-gauge sheet metal to make a solid foundation.
Page 47: Oil Tank Installation Specifications
Fire and explosion hazards installation and usage. If you do not have a copy of this label, please contact your Clean Burn dealer for To prevent serious injury or death: a copy, which is to be affixed directly to your used ONLY place these listed substances in oil supply tank.
Page 48: Installing The Tank Vent And Emergency Vent
Some codes require that you install a tank vent (to the outside) and an emergency vent for your tank as shown in Figure 4F. Tank Vent Kits are available from Clean Burn; contact your local Clean Burn dealer to order. Be sure to check your local codes for any additional tank installation requirements, and adhere to the following installation guidelines: •...
Page 49: Installing The Metering Pump
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Metering Pump Preparing for Installation Before starting installation of the metering pump, review Figures 4G, 4H, and 4I to become familiar with the metering pump components. You will also need to accomplish the following activities: •...
Page 50 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 # PART # DESCRIPTION SUPPLY RETURN TO BURNER 33363 CAPACITOR - GEARMOTOR TO TANK see chart GEARMOTOR 11322 MOUNT - METER PUMP 32037 1/8 NPT X 1/4 TUBE COMPRESSION FITTING 1/4 COPPER OR ALUM. TUBING 3/8 OR 1/2 TUBE FLARE NUT 3/8 OR 1/2 COPPER OR ALUM.
Page 51: Alternate Mounting: Horizontal Positioning
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Metering Pump (continued) Alternate Mounting: Horizontal Positioning ATTENTION: If the metering pump is to be mounted horizontally or on a bracket as shown in Figure 4I, the pump head must be rotated counterclockwise so that it is aligned in a horizontal position.
Page 52: Wiring The Furnace And Pump
Wiring to the Furnace Install a dedicated electrical circuit to the BURNER WARNING: DO NOT tie into junction box on the CB-1750 / 2500 and to the an existing circuit, or electrical BLOWER junction box on the CB-3250. overload may occur.
Page 53: Installing The Suction Oil Line Components
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Suction Oil Line Components ATTENTION: It is critical that you adhere to the following specifications for suction oil line installation (oil line from the tank to the pump). If these specifications are not met, the metering pump will not function correctly and the burner will shut down on reset. The majority of service problems with the metering pump are caused by leaks at fittings in the suction oil line;...
Page 54 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Suction Oil Line Components (continued) • Remove the plug from one of the 1/8" gauge ports in the canister filter and install the vacuum gauge. Seal the threads of the gauge with Permatex #2 non-hardening gasket sealer.
Page 55 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Install the suction oil line (from the the tank to the canister filter): a. Refer to Figures 4H and 4J. b. Prepare a piece of 1/2" O.D. copper tubing (user-supplied) which will function as the pick- up line from the tank to the canister filter. This copper tubing must have the following specifications: •...
Page 56: Installing The Pressure Relief Oil Line Back To The Tank
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Pressure Relief Oil Line Back to the Tank ATTENTION: It is critical that you adhere to the following specifications for plumbing the pressure relief back to the tank. The metering pump requires the installation of a pressure relief oil line back to the tank that you are pulling oil from as shown in Figures 4H, 4J, and 4K.
Page 57: Installing The Pressure Oil Line Components
50 psi and water trap or dryer. If you do not have shop air, an optional air compressor is available. Contact your local Clean Burn dealer for more information. Run a compressed air line from your shop air to the connector block on the furnace. Use minimum 1/4"...
Page 58: Installing The Stack
Installing the Stack WARNING: Inappropriate stack materials or improper stack design/installation can adversely affect the proper, safe operation of your furnace. Contact your Clean Burn dealer to purchase the proper stack components for your furnace. Stack designs are generally classified as follows: (1) "Class A"...
Page 59 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Stack (continued) "CLASS A" STACK CAP - NON-RESTRICTIVE TYPE TO ALLOW FREE FLOW OF THE STACK GASES NOTE: THE LAST STACK SECTION SHALL EXTEND AT LEAST WARNING! ENSURE PROPER 90 cm (3') HIGHER THAN ANY RIDGE, PARAPET, WALL OR ROOF CLEARANCES BETWEEN STACK STRUCTURE WITHIN 3 m (10') OF IT.
Page 60 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Stack (continued) WARNING! ENSURE PROPER "CLASS A" STACK CAP - NON-RESTRICTIVE TYPE CLEARANCES BETWEEN STACK TO ALLOW FREE FLOW OF THE STACK GASES COMPONENTS AND COMBUSTIBLES PER ALL APPLICABLE CODES. NOTE: THE LAST STACK SECTION SHALL EXTEND AT LEAST 3 FEET HIGHER THAN ANY RIDGE, PARAPET, WALL OR ROOF STRUCTURE WITHIN 10 FEET OF IT.
Page 61: Installing The Interior Stack
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Interior Stack WARNING: Single wall stack components may be used only for those portions of the stack which are located inside your building and away from any fire/burn hazards. Install the single wall stack with proper clearances from combustibles. Also ensure that the stack is located a safe distance from all shop personnel.
Page 62: Installing The Stack Safety Switch For Canadian Installations
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Stack Safety Switch For Canadian Installations NOTE: CSA Standards require that all heating equipment must be installed with a stack safety switch. If your heating equipment is being installed in Canada, follow the instructions listed below.
Page 63: Resetting The Stack Safety Switch
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Resetting the Stack Safety Switch WARNING: BURN HAZARD! To prevent serious personal injury, be sure to allow ample time, at least 30 minutes, for the stack, barometric damper, and switch to cool down before attempting to access and service these components.
Page 64: Installing The Stack Penetration
ATTENTION: The draft inducer, Field brand model DI-2, is optional equipment and may be installed to ensure proper draft. The Field brand draft inducer has been tested for use on Clean Burn furnaces. DO NOT use other models or brands of draft inducers.
Page 65 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Optional Draft Inducer (continued) NOTE: Lubricate the motor as recommended by the Draft Inducer manufacturer. "CLASS A" STACK OPTIONAL DRAFT INDUCER NOTE: INSTALL DRAFT INDUCER IN LAST SECTION OF VERTICAL STACK TO POSITION...
Page 66: Installing The Wall Thermostat
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing the Optional Draft Inducer (continued) Refer to Figure 4Q. Follow the instructions included with the draft inducer to mount the draft inducer on the section of single-wall vertical stack. Position the draft plate all the way out so that it does not reduce the draft produced by the draft inducer.
Page 67: Section 5: Metering Pump Priming
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 SECTION 5: METERING PUMP PRIMING Understanding Metering Pump Priming Preparing your Clean Burn furnace for operation begins with priming the metering pump. The procedures in this section must be performed in sequence without interruption to properly prime the pump.
Page 68: Priming The Metering Pump
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Priming the Metering Pump ATTENTION: The priming process must be done precisely as described in this procedure to ensure that all air is thoroughly bled from the system. Failure to bleed all air from the system will result in repeated burner shutdowns on reset.
Page 69 Priming the Metering Pump (continued) Activating the Pump NOTE: The CB-1750/2500/3250 furnaces feature a priming switch which is mounted on the right-hand side of the electrical junction box on the front of the furnace cabinet. The priming switch has two positions: PRIME (switch is in the UP position): This is used only for pump priming.
Page 70: Vacuum Testing The Oil Pump
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Run the pump until a solid stream of oil flows from the pump bleeder. This will bleed all air out of the suction line, oil filter and pump head. ATTENTION: For the metering pump to operate correctly, it is very important that the system is entirely full of oil and all air is bled out.
Page 71 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 If there are no suction leaks, the system will hold vacuum. NOTE: It is acceptable for the vacuum to drop one to five inches within one minute as the seal in the pump seats. The vacuum should then hold steady for 15 minutes.
Page 72 Operator's Manual: Models CB-1750, CB-2500 & CB-3250...
Page 73: Section 6: Starting And Adjusting The Burner
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 SECTION 6: STARTING AND ADJUSTING THE BURNER Understanding Burner Startup and Adjustment Starting and adjusting the burner involves a series of separate procedures which must be accomplished in sequence without interruption. Review all the procedures before attempting burner startup and adjustment, paying careful attention to safety information statements.
Page 74 7/8" Used Hydraulic Oil* check flame length 12-18 7/8" check flame length #4 and #5 Fuel Oils 12-18 7/8" *If you are burning light viscosity oils, it may be necessary to install a smaller nozzle. Call your local Clean Burn Distributor for more information.
Page 75: Starting The Burner
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Starting the Burner Adjust the thermostat setting above room temperature to start the burner. Adjusting the Air Regulator: As soon as the burner starts running, turn the knob on the air regulator clockwise to achieve proper operating air pressure.
Page 76: Checking The Operation Of The Blower Motor
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Starting the Burner (continued) Fine Tuning the Combustion Air Band: NOTE: The initial setting of the combustion air band may require additional adjustment. • Refer to Figure 6A to identify the combustion air band location on the burner.
Page 77: Section 7: Resetting The Furnace And Burner
Review the material on the following page about the safety switches to determine if the furnace is shut down on high limit. • If the burner still will not restart, contact your Clean Burn Distributor for immediate service. The Oil Primary Control The oil primary control will go into safety lockout...
Page 78: The Blower Switch
When the combustion chamber reaches the proper temperature, the blower/fan switch closes and sends power to the blower motor (CB-1750) or relay (CB-2500/3250) to turn ON the blower motor. When the wall thermostat is satisfied and the burner shuts off, the blower continues to run until the switch senses that the combustion chamber has cooled down.
Page 79 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 The Hi-Temp Limit Switches (continued) CLEAN-OUT BREECH COMBUSTION CLEAN-OUT CAP CHAMBER (33230) F-180 33288 L-290 HI LIMIT AUXILIARY SURFACE MOUNT SWITCH (AUTO RESET) FAN SWITCH BLACK & TAN WIRE FROM TERMINAL BLOCK RED & TAN WIRE LINKS THE 2...
Page 80 Operator's Manual: Models CB-1750, CB-2500 & CB-3250...
Page 81: Section 8: Adjusting The Draft Overfire
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 SECTION 8: ADJUSTING THE DRAFT OVERFIRE Understanding the Importance of Draft Draft in the furnace is created as the hot combustion gases rise up the stack, creating a negative pressure inside the stack and the furnace. This negative pressure is measured as inches of water column (W.C.) of draft.
Page 82: Adjusting The Barometric Damper
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Adjusting the Barometric Damper NOTE: If the draft overfire is not in the -.02 to -.04 w.c. range, it is necessary to adjust the barometric damper. Before starting the burner, turn the weight on the flapper COUNTERCLOCKWISE until the flapper remains closed.
Page 83: Understanding The Effect Of Exhaust Fans On Draft
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Understanding the Effect of Exhaust Fans on Draft Any type of exhaust fan, paint booth, or exhaust system in a building will create negative pressure in the building unless there is a source of make-up air (i.e. fresh air which enters the building and replaces the air removed by the exhaust fans.) Refer to Figure 8C on the following page.
Page 84 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 EXHUST FAN CREATES BACKDRAFT IN STACK AND SUCKS COMBUSTION GASES DOWN THE BACKDRAFT STACK AND BACK INTO THE FURNACE BACKDRAFT CREATED BY EXHAUST FAN Special Note to Service Personnel To arrive at proper...
Page 85: Installing A Make-Up Air Louver
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing a Make-up Air Louver Exhaust Fans and Make-up Air Louvers When exhaust fans are operated in tight buildings, there is little or no source of fresh air to replace the air removed from the building by the exhaust fan. This results in negative pressure (vacuum) in the building which creates severe backdraft problems at the furnace.
Page 86 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Installing a Make-up Air Louver (continued) Calculated Opening Size Required Louver / Grill Size (Square Feet) (Inches) From 0.000 to 0.569 10 x 10 From 0.570 to 0.900 12 x 12 From 0.901 to 1.556 16 x 16 From 1.557 to 2.070...
Page 87: Section 9: Maintenance
SECTION 9: MAINTENANCE Understanding Maintenance Servicing your Clean Burn furnace in a timely manner is very important to keep your furnace running in peak condition. Just as an automobile requires periodic maintenance such as oil changes, engine tune- ups, etc. your Clean Burn furnace also requires regularly scheduled service.
Page 88 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Periodic Burner Inspection Following initial start up of the burner, you should inspect the operation of the burner periodically--ideally on a monthly basis. Doing so ensures that the system is functioning efficiently and safely.
Page 89: Cleaning The Canister Filter
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Cleaning the Canister Filter ATTENTION: Never operate your furnace with more than 10" HG of vacuum on the suction side of the pump. High vacuum separates air from the oil and results in erratic burner operation.
Page 90: Servicing The Metering Pump
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Servicing the Metering Pump Refer to Figure 9C. Remove the pump head cover (part 1). Remove the screen (part 2) and wash it. Remove and discard the used gasket (part 3). Install a new gasket (Clean Burn Part #32422).
Page 91: Cleaning The Check Valve
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Cleaning the Check Valve And Check Valve Screen This procedure applies to furnace installations with inside and outside tanks. The following protective gear should be worn when cleaning the check valve/screen: • Rubber gloves •...
Page 92: Cleaning The Tank
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Cleaning the Tank DO NOT allow water, sludge, or other debris to accumulate in your oil supply tank to the point that non- combustible or harmful materials are drawn into the pump or burner.
Page 93: Cleaning Ash From The Furnace
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Cleaning Ash from the Furnace NOTE: The maintenance interval for cleaning ash from the furnace is approximately 700 hours of operation as indicated on the hour meter on the burner (refer to the servicing intervals at the beginning of this chapter).
Page 94 ATTENTION: White ash indicates excessive air pressure. Black ash or soot indicates lack of combustion air. If these conditions exist, call your Clean Burn dealer. DO NOT overfire your furnace by turning up the compressed air. Overfiring will damage the combustion chamber and heat exchanger and will void your warranty.
Page 95: Annual Burner Tune-Up
--similar to an automotive tune-up--to keep it running in peak condition. The burner tune-up should be performed by a qualified Clean Burn service technician who has the necessary parts and expertise. Contact your local Clean Burn dealer to schedule the annual periodic maintenance which is usually (preferably) performed during warm weather to prepare the furnace for the next heating season. Various levels of service are provided to fit your particular need.
Page 96 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 9-10...
Page 97: Section 10: Troubleshooting
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 SECTION 10: TROUBLESHOOTING The following charts and tables are provided for reference in troubleshooting any difficulties encountered in furnace operation and adjustment. The Flow Chart outlines the proper sequence of events in furnace operation -- use this •...
Page 98 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 10-2...
Page 99 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 PROBLEM POSSIBLE CAUSE(S) POSSIBLE ACTION(S) Burner won’t run at all and Circuit breaker/main switch open. Close circuit breaker/switch. Green power light is NOT ON. Fuse/breaker blown. Electrician should check out electrical system. Burner cable is damaged or not Check burner cable.
Page 100 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 PROBLEM POSSIBLE CAUSE(S) POSSIBLE ACTION(S) Burner ignites, but will not stay There is a fuel delivery problem. Follow the procedures listed in the running and Burner shuts off on reset next problem. within 15 seconds.
Page 101 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 PROBLEM POSSIBLE CAUSE(S) POSSIBLE ACTION(S) Burner ignites and Burner shuts off There is air in the fuel supply. Prime the pump. If the pump on reset sometime later during the will not prime or there is air in day or night.
Page 102 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 PROBLEM POSSIBLE CAUSE(S) POSSIBLE ACTION(S) Pump will not prime and Pump There is a leak(s) in the suction Follow the specifications in Section motor is running. line. 4 to make sure the suction line is installed properly and that all fittings are 100% airtight.
Page 103 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 PROBLEM POSSIBLE CAUSE(S) POSSIBLE ACTION(S) Pump will not prime and Pump motor is There is NO power on the pump Start the burner and adjust the air NOT running. circuit from the burner.
Page 104 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 10-8...
Page 105: Furnace Technical Specifications
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 APPENDIX A Detailed Furnace Specifications Furnace Technical Specifications FURNACE MODEL CB-1750 CB-2500 CB-3250 BTUH Input 175,000* 250,000* 300,000* @ 1.2 GPH @ 1.7 GPH @ 2.1 GPH Listed Fuels: #2, #4, #5 Fuel Oils...
Page 106: Burner Technical Specifications
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Burner Technical Specifications Burner CB-525-S2 Ignition Transformer Carlin Transformer 14,000 Volts Nozzle Delavan 9-5 Burner Motor 1/10 HP 3200 RPM with centrifugal switch Burner Motor Rotation CCW shaft end CB-1750 CB2500 / 3250 Compressed Air Requirements 2.0 CFM...
Page 107 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Furnace Dimensions (continued) CB-2500 NOTE: MEASUREMENT FROM BOLT CENTER TO BOLT CENTER IS 69" 18 3/4 14 1/2 26 1/2 TOP VIEW 12 1/2 2 3/4 2 5/8 26 1/2 7 1/4 SIDE VIEW...
Page 108: Burner Components
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Burner Components (CB-525-S2) SEE ILLUSTRATION I88543 FOR PART NUMBERS CB - 525 - S2 BURNER I88234-C Figure A1 - CB-525-S2 Burner Component Detail...
Page 109 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Burner Components (CB-525-S2) (continued) Item# Clean Burn Part# Qty. Component Description 26103 AIR INTAKE OUTER PLATE 11359 AIR INTAKE INNER PLATE 33400 CARLIN PRIMARY CONTROL (w/ INTERRUPTED IGNITION) 33189 CARLIN IGNITER (TRANSFORMER) 33116...
Page 110 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Burner Components (continued) I88543-A Figure A2 - Preheater Block Assembly Component Detail...
Page 111 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Burner Components (continued) Item# C.B. Part# Qty. Component Description 34169 ELECTRODE SCREW - 10-32 x 3/4 33183 SINGLE PIECE ELECTRODE 34165 WASHER 32000 9 - 5 NOZZLE 13150 NOZZLE ADAPTOR 32007 PLUG - 1/8 NPT...
Page 112 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Burner Components (continued) INSTALLATION OF THE SPINNER RETENTION HEAD THE SPINNER RETENTION HEAD FITS INSIDE THE BURNER TUBE AND REQUIRES (3) SELF-TAPPING SCREWS. IT IS VERY IMPORTANT THAT THE SPINNER HEAD IS NOT TIPPED FROM SIDE TO SIDE OR FROM TOP TO BOTTOM.
Page 113: Removing The Nozzle For Cleaning
Check the electrodes for proper gap and clearances. (Figure A3) Re-install the burner and adjust for optimal performance as described in Section 6. NOTE: If the nozzle plugs within a few days after cleaning, call your Clean Burn Dealer for service.
Page 114 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 CABINET CB-1750 (# 11536) DETAIL C DETAIL A DETAIL B DETAIL D I88953-C A-10...
Page 115 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description ITEM# PART# Description 31091 DUCT CAP ROUND 8" • 14084 FIBERGLASS ROPE A 21010 STACK PIPE FLASH RING • 34162 STOVE CEMENT - HIGH TEMP 29083 SHROUD RIGHT • 70416...
Page 116 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 BLOWER ASSEMBLY CB-1750 I88954 A-12...
Page 117 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description 34116 10 X 5/8 HEX WASHER HEAD TEK Z 31191 GUARD DD BLOWER 31204 BRACKET KIT - 3/4 HP MOTOR EA 31199 BLOWER DD 1750 10-10A 33142 CLAMP 3/8 FLEX CONDUIT or 1/4 33470 FLEX CONDUIT R.W.
Page 118 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 CABINET CB-2500 ( # 11471 ) DETAIL A DETAIL C DETAIL B DETAIL D I88955-B A-14...
Page 119 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description ITEM# PART# Description 31091 DUCT CAP ROUND 8" • 14084 FIBERGLASS ROPE A 21010 STACK PIPE FLASH RING • 11471 FURN CAB CB-2500 29066 SHROUD RIGHT • 11473 ACCESSORY GROUP...
Page 120 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 BLOWER ASSEMBLY CB-2500 I88956 A-16...
Page 121 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description 31191 GUARD DD BLOWER 31189 BLOWER CB-2500 12057 FLEX CONDUIT RW 3/8 X 23 33055 WIRE PROTECTOR (anti-short) 33450 MOTOR 1 HP 11482 MOTOR MOUNT WELD 34116 10 X 5/8 HEX WASHER HEAD TEK Z 34035 CB 3/8-16 X 1.25 G5 Z...
Page 122 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 CABINET CB-3250 #11595 DETAIL B DETAIL A DETAIL C I89028-B A-18...
Page 123 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description ITEM# PART# Description 31091 DUCT CAP ROUND 8" • 33572 METER PUMP CB-3250 21010 STACK PIPE FLASH RING • 31084 BLOWER - CB 3250 29165 SHROUD RIGHT • 29157 FLUE PLATE COMBUSTION CHAMBER...
Page 124 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 BLOWER ASSEMBLY CB-3250 I89023 A-20...
Page 125 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description 11125 BELT GUARD ASSY 34116 10 X 5/8 HEX WASHER HEAD TEK Z 34214 1/4-20 X 1 HHCS GR-5 ZINC 31226 SHEAVE BUSHING 1" 31225 BLOWER PULLEY 3250/3500/5000 210131 KEY 1/4 X 1 1/4...
Page 126: Metering Pump Components
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Metering Pump Components SUPPLY TO BURNER RETURN TO TANK G AU R .H O TA TI O PACKAGED WITH CLEAN BURN EQUIPMENT SINGLE PIECE OF COPPER TUBING (USER SUPPLIED) PACKAGED WITH CLEAN BURN...
Page 127 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 ITEM# PART# Description ITEM# PART# Description 33363 CAPACITOR • 33297 HOUR METER (60 Hz) 33353 GEAR MOTOR CB-1750 • 21182 MTR PUMP COVER FOR HOUR METER 33354 GEAR MOTOR CB-2500 • 13176 SUCTION FITTINGS PACKAGE...
Page 128 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 A-24...
Page 129: Wiring Diagrams
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 APPENDIX B Wiring Diagrams CB-1750 BLOWER MOTOR WHITE WHITE BLACK BLACK (OPTIONAL) DRAFT INDUCER Ref. 42425 BLOWER PRIME PUMP GRND HOT (BLK) POWER IN BURNER 120 VAC NEUT (WHT) WHITE WHITE BLACK PURPLE...
Page 130: Cb-2500 Furnace Wiring Diagram
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Wiring Diagrams (continued) CB-2500 WHITE SPADE (MALE TO FEMALE) WHITE BLOWER (UNDER LUG SCREW) MOTOR BLACK (OPTIONAL) (UNDER LUG SCREW) DRAFT INDUCER Ref. 42423 TO BLOWER (FLEX CONDUIT) PRIME PUMP GRND HOT (BLK)
Page 131: Cb-3250 Furnace Wiring Diagram (115 Volts)
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Wiring Diagrams (continued) CB-3250 (115 VOLTS) GROUND 115 VOLTS AC VOLTS COMMON / NEUTRAL HOT LEG WHITE BLACK ORANGE BLOWER MOTOR CONTACTOR HAS A 110 - 120 VOLT AC COIL CONNECT 2 HP BLOWER MOTOR...
Page 132: Cb-3250 Furnace Wiring Diagram (230 Volts)
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Wiring Diagrams (continued) CB-3250 (230 VOLTS) GROUND COMMON / NEUTRAL 230 VOLTS AC VOLTS HOT LEG HOT LEG WHITE BLACK ORANGE BLOWER MOTOR CONTACTOR HAS A 110 - 120 VOLT AC COIL CONNECT 2 HP BLOWER MOTOR...
Page 133: Burner Wiring Diagram
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Wiring Diagrams (continued) Figure B5 - Burner Wiring Diagram...
Page 134 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 MODEL CB-1750 - UH/CF DRAWING : I44080 OPTIONAL SERVICE DISCONNECT SWITCH NEUTRAL BLOWER SWITCH BLOWER MOTOR (METAL SURFACE; 33230) HI LIMIT TEMP SWITCH N/C SECONDARY TEMP SWITCH N/C (ON METAL SURFACE:33288) (ON METAL SURFACE:33390)
Page 135 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 MODEL CB-2501-UH/CF DRAWING : I44076 OPTIONAL SERVICE DISCONNECT SWITCH NEUTRAL SINGLE POLE RELAY BLOWER SWITCH 110 V COIL (METAL SURFACE; 33230) BLOWER MOTOR HI LIMIT TEMP SWITCH N/C SECONDARY TEMP SWITCH N/C (ON METAL SURFACE:33288)
Page 136 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 DRAWING : I44123 MODEL CB-3250-UH/CF OPTIONAL SERVICE 115 VOLTS / 60 Hz DISCONNECT SWITCH BLOWER MOTOR (WIRED FOR 115 V) BLOWER SWITCH (METAL SURFACE; 33230) 110 VOLTS COIL HI LIMIT TEMP SWITCH N/C...
Page 137 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 DRAWING : I44122 MODEL CB-3250-UH/CF OPTIONAL SERVICE 230 VOLTS / 60 Hz DISCONNECT SWITCH BLOWER MOTOR (WIRED FOR 230 V) BLOWER SWITCH (METAL SURFACE; 33230) 110 VOLTS COIL HI LIMIT TEMP SWITCH N/C...
Page 138: Metering Pump Wiring Schematic
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Wiring Diagrams (continued) ENCLOSED J-BOX GROUND BLUE L 2 (WHT) L 1 (BLK) * 115 V 60 HZ POWER FROM OIL PUMP CIRCUIT (SEE FURNACE SCHEMATIC) I44040 Figure B10 - Metering Pump Wiring Schematic...
Page 139: Cad Cell Oil Primary Control Data Sheets
Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Understanding the Oil Primary Control Model 40200 / 42230 Cad Cell Oil Primary Control Data Sheet Model 40200/ 42230 CAD Cell Oil C77009 Primary Control Data Sheet • Oil pump bleed assist • Thermostat/aquastat compatible up to 1 min.
Page 140 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 Understanding the Oil Primary Control (continued) Model 40200 / 42230 Cad Cell Oil Primary Control Data Sheet C77010 Start-up & operation continued... Pump Prime To enter pump prime: 1. Start a CFH cycle. During Pre-Ignition or Pre-Purge, press Reset until motor turns off (10 seconds), then in Pump Prime, release Reset button.
Page 141 Operator's Manual: Models CB-1750, CB-2500 & CB-3250 APPENDIX C Furnace Service Record Furnace Purchased: Date __________ From (name/phone)________________________________ Furnace Installed: Date __________ By (name/phone)__________________________________ Furnace Inspected: Date __________ By (name/phone)__________________________________ Note: Refer to Section 9 for Maintenance Instructions Draft Readings...
Page 142 Operator's Manual: Models CB-1750, CB-2500 & CB-3250...

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CLEAN BURN CB-1750 Operator's Manual

Section 1: Introduction

Guide to this Manual

Section 2: Unpacking

Section 3: Furnace Assembly

Section 4: Furnace Installation

SECTION 4: FURNACE INSTALLATION (Continued)

Section 5: Metering Pump Priming

Section 6: Starting and Adjusting the Burner

Section 7: Resetting the Furnace and Burner

Section 8: Adjusting the Draft Overfire

SECTION 8: FURNACE INSTALLATION (Continued)

Section 9: Maintenance

Section 10: Troubleshooting

Appendix A

Appendix B

APPENDIX B Wiring Diagrams

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