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Crown CHB68-112 Installation, Operation And Service Manual

Oil-fired central furnace
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OIL-FIRED CENTRAL FURNACE
Installation, Operation, And Service Manual
CHB68-112
• Do NOT store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
•
Improper installation, adjustment, alteration, service, or maintenance can
cause a fire or explosion resulting in property damage, personal injury, or
loss of life. For assistance or additional information consult a qualified
installer or service agency.
These instructions should be:
• 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
With Users Information Section
Models:
CHC68-96
c WARNING
Crown Boiler Company
3633 "I" Street
Philadelphia, Pennsylvania 19134
CLBF68-112
CLBR68-112
:
Made in USA

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  • Page 1 OIL-FIRED CENTRAL FURNACE Installation, Operation, And Service Manual With Users Information Section Models: CHB68-112 CHC68-96 CLBF68-112 CLBR68-112 c WARNING • Do NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

  • Page 2: Table Of Contents

    Contents SECTION PAGE Notice to the Installer ....................4 INSTALLATION GUIDELINES ..................5 Codes ......................... 5 Installation Location .................... 5 Closet and Alcove Installation ................6 Standard Clearances ..................6 Air for Combustion and Ventilation ..............7 Chimney Inspection .................... 10 Flue / Chimney / Vent Connector ................
  • Page 3 APPENDIX A: SOURCES FOR REFERENCED STANDARDS ........40 APPENDIX B: ELECTRICAL DIAGRAMS ..............41 APPENDIX C: SPECIFICATION SHEETS ..............43 APPENDIX D: REPLACEMENT PARTS ............... 46...

  • Page 4: Notice To The Installer

    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- 2001, and the National Electrical Code, ANSI/NFPA 70-2002, or the latest editions thereof.

  • Page 5: Installation Guidelines

    INSTALLATION GUIDELINES Codes All local codes and regulations take precedence over the instructions in this manual and shall be followed accordingly. In the absence of local codes, this installation must conform to these instructions and to the regulations of the National Fire Protection Association (NFPA) publications, the Standard for the Installation of Oil-Burning Equipment, NFPA 31-2001, and the National Electrical Code, ANSI/NFPA 70-2002, or the latest editions thereof.

  • Page 6: 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 configuration) directly on combustible materials, refer to Figure 2.

  • Page 7: Air For Combustion And Ventilation

    Accessibility clearances, which are typically greater, may exceed fire protection clearances. Therefore, consider providing at least 24 inches of clearance from the front (and the rear, for lowboy furnaces) of the furnace to obstructions and surfaces for adequate service and maintenance access. The minimum clearances from furnace casing surfaces to combustible materials are: •...
  • Page 8 Often, household chemicals contain chloride-bearing compounds. There are many compounds representative of this classification of chemicals. A few common examples are listed below. • Cleaning solvents • Varnish and paint removers • Bleaches • Fabric softeners • Water softener salt •...
  • Page 9 Provide two (2) permanent openings, one (1) located within 12 inches of the floor and one (1) within 12 inches of the ceiling, or roof, of the room. These openings shall allow for direct exchange of air between the room and outdoors.

  • Page 10: Chimney Inspection

    Chimney Inspection The chimney, vent, or any passageway for the stack gases to flow to the outdoor atmosphere is a very important part of the heating system. No furnace, regardless of the efficiency of the design, can perform satisfactorily when the chimney to which it is connected is inadequate or in poor condition.

  • Page 11: Power (Side-Wall) Venting - Important Note Regarding

    If desired, with the furnace flue elbow turned to the right, the standard furnace top front panel (p/n 52-17346-1) may be replaced with the top front panel from the rear flue lowboy model (p/n 52-17383-1). Refer to Appendix D: Replacement Parts for sketches of these parts.

  • Page 12: Duct Work And Air Conditioning

    Duct Work and Air Conditioning Design and installation of the duct system should follow the current guidelines of the Air Conditioning Contractors of America (ACCA) or the American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc. (ASHRAE). Refer to the Residential Duct Systems, Manual D, from the ACCA, and the ASHRAE Handbook Fundamentals volume, from ASHRAE, for recommended practices in duct system design and installation.
  • Page 13 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. The side casings have each been pre-punched with four (4), square, knockout openings for use in locating the proper position for the return air filter rack.

  • Page 14: Electrical Connections

    Electrical Connections NOTICE: All field wiring must conform to local, state, and national installation codes. A disconnecting switch equipped with overcurrent protection rated at 15 A. (e.g. a time delay-type fuse or inverse time, circuit breaker) should be installed in the service line for shutting down and protecting the furnace and electrical system.

  • Page 15: Combustion Chamber

    The room thermostat should be located on an interior wall in the natural circulating path of the room air. The thermostat should not be installed in a location where it is directly exposed to, • cold air infiltration, i.e. drafts from outside openings such as windows and doors, •...
  • Page 16 Nozzle selection (i.e. heating capacity of the furnace) shall be based on a rate of heat loss (heating load) calculation for the building. These calculations should be 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.
  • Page 17 Figure 4: Side view of correct burner insertion into combustion chamber Push the burner flange gasket (included with the burner) on to the burner mounting plate threaded studs. 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 18: Fuel System Installation

    the gap between the outer surface of the air tube and the inner wall surface of the combustion chamber opening to provide a seal, keeping hot combustion gases within the chamber. Insert and secure the cable or conduit from the wiring harness in the burner junction box.

  • Page 19: Horizontal / Counterflow Furnace Setup

    Horizontal / Counterflow Furnace Setup The horizontal / counterflow furnace is shipped from the factory upright for vertical installation (counterflow configuration). If the furnace is to be installed lying down on the right-hand or left-hand side (horizontal configuration), the positions of the oil burner and the fan and limit control thermostat may have to be changed.
  • Page 20 4) When the furnace is installed in the horizontal configuration, the high limit and fan control must also be located in the upper position on the casing when the furnace is placed in the final installed position, refer to Figure 7. If the control must be relocated, remove the cover of the control to gain access to the mounting screws.

  • Page 21: Initial Operation Of The Furnace

    INITIAL OPERATION OF THE FURNACE Initial Burner Operation c WARNING: To avoid possible explosion, DO NOT attempt to light the burner if: • Oil has accumulated in the base of the combustion chamber. • The furnace is full of fuel vapors. •...
  • Page 22 7) Measure the oil pump pressure. If required, adjust it to deliver the appropriate pressure for the burner. The oil pump should be set to produce, • 130 PSIG, for the R.W. Beckett model AF burner, • 150 PSIG, for the R.W. Beckett model NX burner, •...

  • Page 23: Supply/Return Airflow And Air Temperature

    10) Flue Gas Temperature – The flue gas temperature will vary depending on heat input rate, air temperature rise across the heat exchanger, and air flowrate through the furnace. To prevent excessive water vapor condensation from the flue gases, the gross flue gas temperature should not fall below 330ºF.
  • Page 24 One way to measure the temperature rise across the furnace is to insert temperature measuring devices (e.g. thermometers) into the return air duct and into the supply air duct about 12 inches from the furnace. After the furnace has been firing continually for over 20 minutes, read the temperature difference between the two (2) thermometers.

  • Page 25: Furnace Limit And Blower Controls

    Furnace Limit and Blower Controls All furnaces are equipped with a combined thermostatic high temperature limit and blower (fan) control. The high temperature limit is set such that it does not permit a supply (discharge) air temperature above 200ºF. The thermostatic fan control should be set so the greatest fuel utilization efficiency of the furnace is obtained.

  • Page 26: Room Thermostat

    Room Thermostat Most room thermostats are equipped with user adjustable, or selectable, levels of heat anticipation. This feature helps to reduce the amount of room air temperature overshoot that occurs after a heating cycle. To adjust the heat anticipator, measure the electrical current output of the oil burner primary safety control to the room thermostat.

  • Page 27: Service

    SERVICE Troubleshooting c WARNING: When testing electrical equipment, always follow standard electrical safety procedures. 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.
  • Page 28 3) Confirm the room thermostat is wired correctly, set on the “HEAT” mode, and “calling for heat”. 4) For all primary controls, lockout can be confirmed by measuring voltage from the oil primary safety control to the burner motor. If none, depress the oil primary reset button.
  • Page 29 C. Symptom: Burner short cycles on high limit thermostat, but does not “lock out” on oil primary safety control. Items to check: 1) Open dampers or registers in the air distribution system. Clear any duct system restrictions. 2) Inspect and clean all air filters in the air distribution system. 3) Inspect blower for interference with rotation or locked rotor condition.
  • Page 30 6) Measure the draft at the point where the vent connector attaches to the heat exchanger flue pipe. With the burner operating, the stack draft should not exceed 0.05 in. W.G. If the stack draft has been adjusted above this value to give the proper overfire draft, the heat exchanger will require cleaning.

  • Page 31: 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 32: 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 33: Maintenance

    MAINTENANCE Air Filter(s) c CAUTION: To avoid injury from moving parts, hot surfaces, or electrical shock, shut off the power to the furnace and allow the furnace to cool BEFORE removing any furnace access doors to service air filters. Highboy and lowboy furnace models are factory-supplied with a permanent-type, air filter.
  • Page 34 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 35: 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. The inner radiator of the heat exchanger may be cleaned from the inside of the combustion chamber.

  • Page 36: Users Information

    USERS INFORMATION c WARNING: • 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 37: Oil Supply

    4) This furnace is equipped with an electronic ignition system that automatically lights the burner. DO NOT try to light the burner by hand. 5) Turn on the electric power to the furnace at the disconnecting switch. 6) Adjust the room thermostat to the desired setpoint and set the operating mode, if equipped, to “HEAT”.

  • Page 38: Extended Shutdown

    • Annually, have a bottom sample from the fuel oil tank taken for analysis. If present in excessive quantities, sludge and water should be removed. Fuel oil additives may be of benefit in helping to resolve some problems that are indicated by the analysis. In severe cases, tank cleaning may be required.
  • Page 39 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 40: 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 41: Appendix B: Electrical Diagrams

    APPENDIX B: ELECTRICAL DIAGRAMS...

  • Page 43: Appendix C: Specification Sheets

    APPENDIX C: SPECIFICATION SHEETS Crown Furnace Oil-Fired Highboy Furnace Specifications Model CHB 68-112 Heat Input Rate (BTUH): 140000 * 119,000 105,000 84,000 Nominal Thermal Efficiency (%): 83.6 Heating Capacity (BTUH): 115000 * 98,000 87,000 70,000 Nominal Temp. Rise (deg. F.): Minimum AFUE Rating (%): 82.4 Gross Heat Exchange Area (sq.
  • Page 44 Crown Furnace Oil-Fired Lowboy Furnace Specifications CLBF 68-112 (Front Flue) or CLBR 68-112 (Rear Flue) Model Heat Input Rate (BTUH): 140000 * 119,000 105,000 84,000 Nominal Thermal Efficiency (%): 84.2 Minimum Heating Capacity (BTUH): 114000 * 98,000 87,000 70,000 Nominal Temp. Rise (deg. F.): 82.0 Minimum AFUE Rating (%): 27.8 (front flue) / 30.0 (rear flue)
  • Page 45 Crown Furnace Oil-Fired Horizontal/Counterflow Furnace Specifications Model CHC 68-96 Heat Input Rate (BTUH): 119,000 105,000 84,000 84.2 Nominal Thermal Efficiency (%): Minimum Heating Capacity (BTUH): 98,000 86,000 69,000 Nominal Temp. Rise (deg. F.): Minimum Efficiency Rating (AFUE): 82.0 27.8 Gross Heat Exchange Area (sq. ft.): 22.25 (in horizontal configuration) Casing Height (in.): 61.25 [in counterflow (vertical) configuration]...

  • Page 46: Appendix D: Replacement Parts

    APPENDIX D: REPLACEMENT PARTS Highboy Model...
  • Page 47 Lowboy Front Flue Model...
  • Page 48 Lowboy Rear Flue Model...
  • Page 49 Horizontal/Counterflow Model...

This manual is also suitable for:

Clbf68-112Clbr68-112Chc68-96

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