Crown Boiler CHB68-112 Installation, Operation And Service Manual
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Crown Boiler CHB68-112 Installation, Operation And Service Manual

Crown Boiler CHB68-112 Installation, Operation And Service Manual

Oil-fired central furnace
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P/N: MO-426 (Printed Instruction Manual)
Note: This page is not to be included as part of printed hard copy.
Overall Specifications:
Material: white plain paper
Printed text: black
Binder: staple upper left corner
Individual page specifications:
Cover page: printed single-side up
The balance of instruction manual pages to be printed utilizing both front and back side of paper.

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Summary of Contents for Crown Boiler CHB68-112

  • Page 1 P/N: MO-426 (Printed Instruction Manual) Note: This page is not to be included as part of printed hard copy. Overall Specifications: Material: white plain paper Printed text: black Binder: staple upper left corner Individual page specifications: Cover page: printed single-side up The balance of instruction manual pages to be printed utilizing both front and back side of paper.
  • Page 2 • read prior to installing the furnace. • retained for reference by qualified service personnel. • reviewed before performing any service or maintenance. MO-426 ECN 5079-MA Models: CHC68-96 c WARNING Crown Boiler Company 3633 “I” Street Philadelphia, Pennsylvania 19134 CLBF68-112 CLBR68-112 Made in USA...

  • Page 3: Table Of Contents

    Combustion Chamber ... 15 Oil Burner and Oil Nozzle Installation ... 15 Fuel System Installation ... 18 Horizontal / Counterflow Furnace Setup ... 19 INITIAL OPERATION OF THE FURNACE ... 21 Initial Burner Operation ... 21 Supply/Return Airflow and Air Temperature ... 23 Furnace Limit and Blower Controls ...
  • Page 4 APPENDIX A: SOURCES FOR REFERENCED STANDARDS ... 40 APPENDIX B: ELECTRICAL DIAGRAMS ... 41 APPENDIX C: SPECIFICATION SHEETS ... 43 APPENDIX D: REPLACEMENT PARTS ... 46...

  • Page 5: Notice To The Installer

    Installation of this oil-fired furnace must be performed by a qualified installer in accordance with all local codes and authorities having jurisdiction. In the absence of local governing codes, installation shall conform to these instructions and to the regulations of the National Fire Protection Association’s Standard for the Installation of Oil-Burning Equipment, NFPA 31-...

  • Page 6: Installation Guidelines

    If the furnace is installed in a residential garage, it must be installed so the burner is located higher than 18 inches above the floor, unless the required combustion air is taken from the exterior of the garage.

  • Page 7: Closet And Alcove Installation

    Figure 1: Recommended Support Frame for Horizontal / Counterflow Furnaces Closet and Alcove Installation All furnace models may be installed in a closet or alcove on combustible flooring with specified (standard) clearances to combustible construction. The horizontal / counterflow furnace model requires an optional combustible surface-mounting base (model # CSFB-HC68) for vertical installation (i.e., counterflow...

  • Page 8: Air For Combustion And Ventilation

    The minimum clearances from furnace casing surfaces to combustible materials are: • 3 inches from casing sides and rear • 8 inches from front casing of furnace to the closet door, with exception of: o the lowboy rear flue model only requires 3 inches from front casing of the...
  • Page 9 If it is necessary to store or use chemicals in the same space as the furnace, the area should be well-ventilated and all containers should be sealed when not in use.
  • Page 10 2. Full Basement (example of an unconfined space) a. Where a furnace is installed in a full basement, in a building of conventional construction with normal air infiltration, infiltration is normally adequate to provide air for combustion and ventilation.

  • Page 11: Chimney Inspection

    For some installations, it may be prudent to turn the furnace flue elbow 90 degrees clockwise, with respect to the front of the furnace, such that the elbow is open to the right-hand side of the unit, rather than upward. Turning the flue elbow may better facilitate connection of the vent connector piping to the flue elbow on the highboy and front flue, lowboy furnaces.

  • Page 12: Power (Side-Wall) Venting - Important Note Regarding

    NOTICE: Crown Boiler recommends the use of a chimney to vent residential oil furnaces. If a power venter must be used, it is the responsibility of the installer and power venter manufacturer to design, assemble, and demonstrate proper operation of the power venting system with the furnace.

  • Page 13: Duct Work And Air Conditioning

    Due to the need to maintain an adequate supply of combustion and ventilation air, the furnace shall not be installed in small room without return air duct system. A duct the full size of the furnace return air opening shall extend to a location outside the furnace room.
  • Page 14 On the highboy furnace, it is necessary to cut the return air opening in the lower side, or rear, of the casing depending upon the needs of the specific installation, refer to Figure Figure 3: Cutaway view of fan section of a typical highboy furnace.

  • Page 15: Electrical Connections

    Since the furnace is entirely pre-wired at the factory, it is only necessary to connect the building electrical service lines to the two (2) pigtail wires extending from the fan center junction box.

  • Page 16: Combustion Chamber

    NOTICE: NO other burners may be used in this application. The heat output from the furnace is fixed, based on the size of nozzle installed in the oil burner. Four (4) heat input rates are permissible: 85,000, 105,000, 120,000, and 140,000 BTUH.
  • Page 17 ACCA and the ASHRAE at the addresses given in Appendix A of this manual. The oil burner is shipped in a separate carton from the furnace. In the field, it is necessary to mount the oil burner, secure it to the furnace, and connect the wiring harness to complete the installation.
  • Page 18 Seat the gasket against the mounting plate. Using fasteners supplied in the parts bag with each furnace, three (3) 5/16 in. brass hex nuts and three (3) steel flat washers, install and secure the burner to the mounting studs on the burner mounting plate, refer to Figure 5.

  • Page 19: Fuel System Installation

    Insert and secure the cable or conduit from the wiring harness in the burner junction box. Snap together the two (2) mating, multipin quick connections, on the wiring harness from the furnace fan center and the wiring harness of the oil burner, inside the burner junction box.

  • Page 20: Horizontal / Counterflow Furnace Setup

    2) Install the flange gasket and the burner on the mounting plate threaded studs. Using fasteners supplied in the parts bag with each furnace [use two (2) or three (3) 5/16 in. brass hex nuts and flat washers, as required], secure the burner to the mounting studs on the burner mounting plate.
  • Page 21 Figure 7. If the control must be relocated, remove the cover of the control to gain access to the mounting screws.

  • Page 22: Initial Operation Of The Furnace

    CAUTION: The oil burner must be installed and adjusted using recently (within the last year) calibrated combustion instruments by a qualified heating contractor prior to placing the furnace in operation. Refer to this manual and the oil burner instruction manual for details.
  • Page 23 9) Draft – Draft measurements should be taken through the overfire port and in the vent connector, not more than 12 inches away from the furnace outlet. A 5/16 in. hex washer head bolt plugs the overfire port in the burner mounting plate.

  • Page 24: Supply/Return Airflow And Air Temperature

    The supply/return airflow shall be set to obtain an air temperature rise, across the furnace, in the range of 70 to 100ºF. Since the flow resistance of each duct system is slightly different, the airflow (fan speed) may have to be changed in the field to achieve a satisfactory temperature rise.
  • Page 25 The blower (fan) speed fan is adjusted by changing the fan motor winding energized by the control system. The furnace is set on the lowest fan speed, “L”, at the factory, refer to Table 2. To adjust the fan speed, follow this procedure.

  • Page 26: Furnace Limit And Blower Controls

    The thermostatic fan control should be set so the greatest fuel utilization efficiency of the furnace is obtained. Generally, a blower “ON” setting of 130ºF should give the best result. After the burner shuts down, the circulating air blower will continue to operate until the air temperature inside the furnace falls below the lower setting on the fan control.

  • Page 27: Room Thermostat

    1) Describe the general operation of the furnace and, if properly equipped, the cooling system. 2) Show the location of the furnace air filter(s) and those in the duct system, if equipped. Demonstrate how to remove, clean, and replace the air filter(s).

  • Page 28: Service

    Before beginning these troubleshooting procedures, always review these basic points. 1) Check for 120 VAC power to the furnace. If there is no voltage, check the disconnecting switch for circuit breaker trip or blown fuses. 2) Make sure the room thermostat is set on the heating mode and is “calling for heat”.
  • Page 29 If the burner does not operate properly after depressing the reset button three (3) times, turn off the electrical power to the furnace and close the manual oil shutoff valve. Immediately contact a qualified heating contractor for service.
  • Page 30 3) Measure the oil pump pressure. If required, adjust the pressure to burner nameplate value. (This is the typical minimum pressure required to obtain the full input rate from the furnace). 4) Verify the burner is configured as specified in Table 1 and adjusted according to the Initial Burner Operation section of this manual and the burner manufacturer’s instructions.
  • Page 31 If there is little or no stack draft, the chimney flue way may require cleaning, the chimney is too restrictive, or a downdraft condition exists. E. Symptom: Furnace blower will not start. Items to check: 1) Confirm there is 120 VAC at the blower motor terminal block.

  • Page 32: Flame Sensor ("Cad Cell") Checkout Procedure

    Flame Sensor (“Cad Cell”) Checkout Procedure On the Honeywell oil primary control, to check the electrical resistance of the flame sensor (referred to as a cadmium sulfide photocell, or “cad cell”), depress the reset button on the oil primary safety control while the burner is firing. The oil primary control will report the measured resistance range of the cad cell by flashing the LED (light emitting diode) one (1) to four (4) times.

  • Page 33: Replacement Parts

    On the Riello 40-F3 burner only, the cad cell is an integral part of the oil primary control. If replacement of the cad cell is required, the entire primary control must be replaced. Replacement Parts Appendix D of this manual contains a list of replacement parts available for these furnaces.

  • Page 34: Maintenance

    CAUTION: DO NOT attempt to clean the heat exchanger unless electrical power and fuel flow to the furnace are turned off and the furnace is at room temperature. c CAUTION: The combustion chamber refractory material is fragile and can be easily damaged.
  • Page 35 NOTICE: A qualified heating contractor MUST inspect the heat exchanger in this furnace at least once a year. If heavy deposits are found, immediate cleaning is required. All heat exchanger surfaces should be as clean as possible for the most efficient operation of the furnace.

  • Page 36: Flue And Chimney

    The heat exchanger may also be cleaned through the flue pipe connection. With the furnace turned off and at room temperature, carefully remove the vent connector and the heat exchanger flue pipe, if equipped, to inspect and clean the heat exchanger.

  • Page 37: Users Information

    • The area around the furnace should be kept free and clear of flammable vapors, liquids, and material, especially papers and rags. • NEVER burn garbage or refuse in the furnace. NEVER try to ignite oil by tossing burning papers or other material into the furnace.

  • Page 38: Oil Supply

    1) Adjust the room thermostat to the lowest setpoint and set the operating mode, if equipped, to “OFF”. 2) If service will be performed, turn off all electric power to the furnace at the disconnecting switch. 3) Turn the manual oil shutoff valve to the closed or “OFF” position.

  • Page 39: Extended Shutdown

    Lack of adequate combustion and ventilation air can result in erratic operation of the burner, noisy and poor combustion, sooting of the combustion chamber, and fuel odors in the air. Never block off or restrict the supply of air to the furnace. Inspection Areas Burner Compartment: On the highboy and lowboy furnace models, the burner compartment can be inspected by removing the front door of the furnace.
  • Page 40 Venting System: The furnace flue pipe, vent connector, barometric damper, and chimney should be inspected for: • Signs of excessive rust, corrosion pitting, and holes. • Signs of condensation or moisture leakage (sometimes indicated by soot or condensate streaks). • Evidence of structural damage, and loose or disconnected piping joints.

  • Page 41: Appendix A: Sources For Referenced Standards

    APPENDIX A: SOURCES FOR REFERENCED STANDARDS 1. Air Conditioning Contractors of America 1712 New Hampshire Avenue, N.W. Washington, D.C. 20009 http://www.acca.org/ 2. American Society of Heating, Refrigeration, and Air-Conditioning Engineers, Inc. 1791 Tullie Circle N.E. Atlanta, Georgia 30329 http://www.ashrae.org/ 3. National Fire Protection Association 1 Batterymarch Park Quincy, Massachusetts 02269 http://www.nfpa.org/...

  • Page 42: Appendix B: Electrical Diagrams

    APPENDIX B: ELECTRICAL DIAGRAMS...

  • Page 44: Appendix C: Specification Sheets

    APPENDIX C: SPECIFICATION SHEETS Crown Furnace Oil-Fired Highboy Furnace Specifications Model Heat Input Rate (BTUH): Nominal Thermal Efficiency (%): Heating Capacity (BTUH): Nominal Temp. Rise (deg. F.): Minimum AFUE Rating (%): Gross Heat Exchange Area (sq. ft.): Casing Height (in.): Casing W idth (in): Casing Depth (in.):...
  • Page 45 Crown Furnace Oil-Fired Lowboy Furnace Specifications Model Heat Input Rate (BTUH): Nominal Thermal Efficiency (%): Minimum Heating Capacity (BTUH): Nominal Temp. Rise (deg. F.): Minimum AFUE Rating (%): Gross Heat Exchange Area (sq. ft.) ** : Casing Height (in.): Casing W idth (in): Casing Depth (in.):...
  • Page 46 Crown Furnace Oil-Fired Horizontal/Counterflow Furnace Specifications Model Heat Input Rate (BTUH): Nominal Thermal Efficiency (%): Minimum Heating Capacity (BTUH): Nominal Temp. Rise (deg. F.): Minimum Efficiency Rating (AFUE): Gross Heat Exchange Area (sq. ft.): Casing Height (in.): Casing W idth (in.): Casing Depth (in.):...

  • Page 47: Appendix D: Replacement Parts

    APPENDIX D: REPLACEMENT PARTS Highboy Model...
  • Page 48 Lowboy Front Flue Model...
  • Page 49 Lowboy Rear Flue Model...
  • Page 50 Horizontal/Counterflow Model...

This manual is also suitable for:

Chc68-96Clbf68-112Clbr68-112

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