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OIL FIRED FURNACE 
INSTALLATION AND OPERATION MANUAL 
WITH USERS INFORMATION SECTION 
 
MODEL: Counterflow / Horizontal 
OD6FA072D48B OD6RA072D48B OD6FX072DV5R 
OD6FA072DV5B OD6RA072DV5B OD6RX072DV5R 
OD6FA072D48R OD6RA072D48R                  
OD6FA072DV5R OD6RA075DV5R  
 
 
 
 
c WARNING: IF THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A 
FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY, OR 
LOSS OF LIFE. 
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMAB
                    
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                          CONTENTS  SECTION                   PAGE  I.  SAFETY SECTION          1  A. CODES AND CLEARANCES       3  B. MAKE-UP AIR         4  II.  GENERAL INSTRUCTIONS         5  A. CHIMNEY          6  B. VENTING          10  C. DRAFT REGULATORS        11  D. DUCT WORK/AIR CONDITIONING       11  E. AIR FILTER(S)         15  F. LIMIT POSITION AND LOCATION       16  G. BURNER INSTALLATION        16  H. BURNER SPECIFICATIONS AND APPLICATIONS     19  I. OILTANK AND PIPING        22  J. OIL FILTER          2
                    
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                        Model Number Digit 1 2 3 4 5 6 7 8 9 10 11 12    Oil Furnace Model Nomenclature   Example Model Numbers O D 6 F A 0 7 2 D 4 8 B  O D 6 F A 0 7 2 D V 5 R  O D 6 R A 0 7 2 D 4 8 B  O D 6 R A 0 7 2 D V 5 R  O D 6 F X 0 7 2 D V 5 R  O D 6 R X 0 7 2 D V 5 R               O = Oil O                       H = Highboy   D = Downflow   D                     6 = Heat Exchanger Size Identifier     6                    F = Front       F                  R = Rear        R                 A = Single Stage     
                    
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                          I.  SAFETY SECTION  This page and the following contains various warnings and cautions found  throughout the Oil Furnace Manual. Please read and comply with the statements  below.    cWARNING AND CAUTIONS:    cWARNING: This furnace is not to be used as a construction heater. See Page 3    c CAUTION MUST BE TAKEN NOT TO EXCEED 90° ROTATION (OF THE FLUE  ELBOW) LEFT OR RIGHT FROM THE VERTICAL POSITION.  See Page 10    cWARNING:  The predetermined limit locations on all of the Thermo Pride oil fi
                    
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                          The entire text of these instructions must be read and understood, before  installing the appliance. It is the installer's responsibility to do the following:    1. Inform and demonstrate to the user, the correct operation and maintenance of the appliance, as  explained in the Homeowner/User Information and Routine Maintenance section of this manual.     2. Inform the user of the hazards of flammable liquids and vapors and to remove such liquids and  vapors from the vicinity of the appliance. 
                    
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                           b. Non-combustible material:  “...material that is not capable of being ignited and burned; such as material  consisting entirely of, or a combination of, steel, iron, brick, concrete, slate,  asbestos, glass, and plaster.”    : Carefully read and thoroughly understand the following guidelines and warnings  before continuing with the installation of this appliance.  Failure to follow these guidelines can  cause improper and unsafe operation of this appliance. Unsafe operation can result in su
                    
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                          II.  GENERAL INSTRUCTIONS - READ BEFORE START OF INSTALLATION    1.  The heating output capacity of the furnace proposed for installation should be based on a heat loss   calculation made according to the manuals provided by the Air Conditioning Contractors of America  (ACCA) or the American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc.  (ASHRAE).    2.  All local codes and/or regulations take precedence over the instructions in this manual and should be  followed acco
                    
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                          A.  CHIMNEY:  The furnace must be connected to an adequate chimney or an approved vent in accordance with these  instructions. An adequate chimney is one that is sealed and lined with the capability of producing a (-).04"  WC flue draft and having the capacity to handle the amount of stack gases that are introduced into it. A  chimney with an internal construction of corrosion resistant tile, stainless steel, or some other material  that will withstand flue gas temperatures up to 900°F is requ
                    
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                          and reduce the stack gas temperature loss. Insulation may be added around the liner for further  temperature stability. If the chimney is on the home's exterior or passes through a sizable, unheated area  of the building, such as a porch, high ceiling attic, etc., and condensing occurs, the chimney must be  insulated around its exterior to help the flue hold its temperature. Also, check to see if the chimney is too  large for the furnace and other appliances connected to it. If so, reduce to p
                    
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                            Fig. 4: Proper insertion of the vent connector in the chimney.      5. PROPER CHIMNEY BOTTOM LEVEL:  In cases where the chimney extends to the basement floor, the draft can usually be improved by filling the  base of the chimney with sand to within 12 inches of the vent connector pipe after relocating the clean-out  door. (See Fig. 5).  Fig. 5: Suggested method to improve chimney draft.      6. TIGHT JOINTS:  All joints of the chimney must be tightly sealed. The inside of the chimney should 
                    
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                              Fig. 6: Suggested method to accommodate vent connector passage through a wall composed of a combustible material.        Fig. 7: Alternate constructions that allow reduced clearances to combustible materials.    REDUCTION OF CLEARANCES WITH SPECIFIED FORMS OF PROTECTION:  Type of protection applied to and covering all surfaces of combustible material within the distance  specified as the required clearance with no protection unless otherwise noted, all dimensions in inches,  refer to Fig. 
                    
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                          The vent connector pipe between the furnace and chimney shall be of equal diameter as the flue outlet of the  furnace. The vent connector pipe must be made of 24 gauge (or thicker) corrosion-resistant steel. The  vent connector pipe should be as short as possible and installed so that it has a continuous rise from the  furnace to the chimney. The horizontal length of a connector to a natural draft chimney or vent serving a single  appliance shall not be more than 75 percent of the height of th
                    
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                          The combustion air inlet can be installed through the either the lower left side casing knock-out or the  lower right side casing knock-out.    C. DRAFT REGULATORS:  A draft regulator is supplied with the furnace and should be installed according to the regulator  manufacturers recommendations. With the burner operating, use a draft gauge to adjust the regulator to  the proper setting. (refer to the instructions enclosed with draft regulator to adjust to the proper setting).  When the burner a
                    
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                          2. To reduce the transmission of vibration and noise to the duct system and to reduce flexure of the duct  system due to thermal expansion and contraction, it is recommended that flexible joints be installed at  the supply and return duct connections to the unit.    3. The return air duct system must equal the supply air duct system in the flow capacity (CFM) for a  given pressure drop. Use a supplier's catalog for proper sizing of outlet and return air registers and  grills to ensure that the
                    
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                          The ASHRAE Handbook – Fundamentals is an excellent source of duct system design principles  and pressure drop data.  Conversely, for a specified type of fitting, it is also possible to determine  the required size or diameter of the component for a specified pressure drop and flowrate.   h. The resistance of the take-off and the outlet register (or return grill) should then be summed  together to determine the total pressure drop for each branch. This value should be close to  the assumed valu
                    
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                          8. As a final step in the installation, the appliance must be adjusted to deliver a temperature rise within  the range of 50° to 80°F. Adjust the blower motor speed to obtain a temperature rise within the  acceptable range. The required blower speed will depend on the airflow resistance of a supply and  return air duct systems.      Fig. 9: Supply air duct sizing Example    The RETURN AIR DUCT SYSTEM should equal the warm air duct system in airflow capabilities.     NOTE: When a return registe
                    
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                                  E.  Air Filters    Filter Installation    The OD6 comes with (2) two 18-3/4” x 12-3/4” reusable filters. A “W” style filter rack is shipped with the  furnace for placement of the filters inside the return air plenum.  Access to the filters is through the  removable blower door. For horizontal installations, it is recommended that return air grill filters be  installed for homeowner access.                        19.125"         3.000"        Fig. 10: A typical filter rack and dimension
                    
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                                  F.  LIMIT POSITION AND LOCATION    cWARNING:  The predetermined limit locations on all of the Thermo Pride oil fired furnaces have been  tested and approved by Thermo Products, LLC. Any attempt to relocate these safety controls or replace  these safety controls with a control that is not approved, or is incompatible, may result in personal injury,  substantial property damage or death.    The unit listed in the table below must have the limit control installed at the time of unit insta
                    
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                                    Fig. 12-1: Typical location of the overfire air tap and components in burner mounting plate area for OD6F*072D***  counterflow and horizontal installations       17