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Williamson-Thermoflo w 80 Information Manual

Multi-position furnace
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INSTALLER'S INFORMATION MANUAL
UPFLOW
DOWNFLOW
ATTENTION, INSTALLER!
furnace, show the user how to turn off gas and electricity to
the furnace.
Point out control and switch locations for
turning off gas and electricity. Go over the User Information
Manual and Section 26, "Maintaining Furnace In Good
Working Order" in this manual with the user. Make sure the
user understands the importance of following all safety
precautions, including what could happen if they don't.
Attach the following documents on or adjacent to the
furnace. Tell the user where these documents are located:
•
User's Information Manual
•
Installer's Information Manual
•
Parts List
•
Warranty Information
While these instructions have been written as accurately
and thoroughly as possible, they may not cover every
system
variation
or
contingency.
interpretation may arise. For more information, solutions to
particular problems or clarification, contact your local
distributor or the manufacturer.
WARNING:
Individuals who install this furnace, must have the training and experience necessary to install gas
furnaces.
They must also have training and experience necessary to install related comfort air conditioning appliances.
Improper
installation
could
MULTI-POSITION FURNACE
HORIZONTAL AIR-LEFT
After installing the
Questions
of
create
a
hazard,
resulting
HORIZONTAL AIR-RIGHT
ATTENTION, USER!
give you the important documents listed above. You should
immediately read the User's Information Manual for
important safety information to keep you and your family
safe. Keep these as long as you keep your furnace. Pass
them on to future furnace purchasers or users. If any of the
documents are missing or illegible, contact your installer or
furnace manufacturer for replacement.
manual, when we use the word "you" we refer to the
qualified service technician
application, installation and service of your furnace.
−
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
−
WHAT TO DO IF YOU SMELL GAS
•
Do not try to light any appliance.
•
Do not touch any electrical switch.
•
Do not use any phone in your building.
•
Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
•
If you cannot reach gas supplier, call the fire
department.
in
the
possibility
of
Your furnace installer should
Throughout this
who is responsible for
damage,
injury
or
death.
414470 H

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Summary of Contents for Williamson-Thermoflo w 80

  • Page 1 MULTI-POSITION FURNACE INSTALLER'S INFORMATION MANUAL UPFLOW DOWNFLOW HORIZONTAL AIR-LEFT HORIZONTAL AIR-RIGHT ATTENTION, INSTALLER! ATTENTION, USER! After installing the Your furnace installer should furnace, show the user how to turn off gas and electricity to give you the important documents listed above. You should the furnace.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SECTION 1. Important Safety Rules ........................... 2 SECTION 2. Meeting Codes ............................3 SECTION 3. Determining Best Furnace Location ....................... 3 SECTION 4. Conversion To Downflow Configuration ....................5 SECTION 5. Allowing For Clearances......................... 6 SECTION 6. Providing Combustion And Ventilation Air....................

  • Page 3: Section 2. Meeting Codes

    We also use the words "must" and "should" in this manual. SECTION 2. MEETING CODES "Must" is mandatory. "Should" is advisory. This furnace complies with American National Standard and National Standard of Canada for Gas Fired Central WARNING: Read and follow the safety rules in Furnaces, ANSI Z21.47 / CAN/CGA-2.3.
  • Page 4 Btu/Hr* MOTOR* VENT FURNACE RETURN** SUPPLY** BLOWER TEMP INPUT H.P. WIDTH AIR SIZE AIR SIZE WHEEL RISE °F at 0.50” 18-29/32” x B 18-15/16” X C SIZE W.C. 40,000 3” 14-1/2 12-3/4” 12-15/16” 10-4 50-80 40,000 3” 14-1/2 12-3/4” 12-15/16” 10-6 30-60 1265...

  • Page 5: Section 4. Conversion To Downflow Configuration

    Provide ample space for servicing and cleaning, and vestibule near the manifold pipe. In this configuration the around air openings into the combustion chamber. furnace can be installed as a downflow furnace or as a Location must allow 30 inches minimum front clearance for horizontal furnace on its left or right side.

  • Page 6: Section 5. Allowing For Clearances

    Figure 4. Upflow Configuration. Figure 5. Downflow Configuration. 12. Line up front duct flange with holes in casing. Place base panel over front duct flange and secure both to SECTION 5. ALLOWING FOR casing with four screws. CLEARANCES 13. Install junction box on base panel using two #6B blunt- point screws removed in step 1.
  • Page 7 UPFLOW AND DOWNFLOW CLEARANCES Table 1. Upflow/Downflow - Minimum Clearance To Combustibles (Inches) VENT VENT SIDES BACK FRONT MATERIAL CLEARANCE SINGLE WALL TYPE B1 * 14½-inch casings require 1-inch clearance due to single wall vent pipe requirements. All other casing sizes require no clearance.

  • Page 8: Section 6. Providing Combustion And Ventilation Air

    When using single wall vent pipe, horizontal furnaces with 14½-inch high casings must be raised 1 inch to provide 6- inch vent clearance to combustible material. Install a platform under furnace that extends a minimum 30 inches in front of furnace. This provides a work area and keeps insulating materials away from combustion air openings.
  • Page 9 • Furnaces installed near exhaust fans that vent the above areas WARNING: You must provide permanent air openings to a confined furnace installation space from Exposure to the following substances in the combustion air another area as described below. Failure to do so could supply may also require outdoor air for combustion: result in inadequate combustion and ventilation air.
  • Page 10 ALL COMBUSTION AND VENTILATION AIR FROM area of one square inch per 4,000 Btu per hour of total OUTDOORS combined input rating of all gas appliances within furnace space. See Figure 13 and Table 3. The furnace space must be provided with two permanent air openings communicating directly, or by ducts, with the outdoors or spaces that freely access the outdoors.

  • Page 11: Section 7. Providing Proper Venting

    Table 4. Free Opening Area Based On One Square Inch at negative vent static pressure with a vent gas temperature Per 2000 Btu/hr. high enough to avoid condensation in the vent. Category I appliances rely on the buoyancy of combustion products to Total input Required Free Minimum...
  • Page 12 You must connect furnace to a listed chimney or vent Refer to venting tables for correct size vent. An undersized complying with a recognized standard or a suitably sized, vent cannot adequately carry all combustion products constructed and lined masonry chimney. Chimney lining outdoors.
  • Page 13 larger than vent collar. Minimum vent connector diameter from furnace to vent or chimney is same as vent collar. If you join two or more vent connectors before they enter the vertical vent or chimney, use caution. See venting addendum for details on properly sizing vent connectors. Do not connect vent connector to a chimney flue serving a fireplace unless you permanently seal fireplace flue opening.
  • Page 14 If you find an inadequate vent or chimney, do not leave it as Repair or replace it. A new vent must meet these WARNING: Failure to properly terminate vent or instructions and the National Fuel Gas Code ANSI chimney systems could allow combustion products to Z223.1/NFPA 54 and/or CAN/CGA B149 Installation Codes.

  • Page 15: Section 8. Sidewall Venting

    • Length of pipe SECTION 8. SIDEWALL VENTING • Number of fittings • Specific gravity of gas In most cases, proper venting is achieved by using a • Input requirements (Btu per hour) of all gas-fired conventional vertical vent or chimney. However, it is not appliances attached to same main supply line.

  • Page 16: Section 10. Installing Electrical Wiring

    TESTING FOR LEAKS Isolate furnace and its gas control from gas supply line during leak checks. Gas supply line test pressure determines how you isolate gas control. The furnace and its gas control must be disconnected from the gas supply piping system at the ground joint union during any pressure testing of the system at test pressures greater than 1/2 psi (14 inches W.C.).

  • Page 17: Section 11. Sequence Of Operation

    C22.1 and local codes. Use Type T (63 degrees C rise) NOTE: If the pressure switch opens (for more than 2 wire or equivalent. seconds) five times within a single call for heat, the control will lock out for 1 hour. Draft inducer relay is energized.
  • Page 18 Figure 22. Furnace Wiring Diagram. Page 18 Installer’s Information Manual...

  • Page 19: Section 12. Installing Duct System

    CONTINUOUS FAN OPERATION SECTION 12. INSTALLING DUCT When the thermostat calls for continuous fan (G) without a SYSTEM call for heat or cool, the indoor fan is energized on the heating speed after a 0.25 second delay. Properly size duct system based on heat loss and heat gain calculations assure good...

  • Page 20: Section 13. Selecting And Installing Filter Cabinets

    Table 5. Bottom Closure Part Numbers. MOTOR* BOTTOM CLOSURE INPUT* HORSE- PART NUMBER (Btu/Hr) POWER. 40,000 1/4, 1/3 4045900 60,000 1/4, 1/3 60,000 4045901 80,000 1/4, 1/3 4045900 80,000 4045901 80,000 4045902 100,000 1/3, 1/2 4045901 100,000 4045902 120,000 1/2, 3/4 140,000 3/4, 3/4 4045903...
  • Page 21 many installation positions and configuration options. Manufacturer's bottom filter cabinet and upflow side filter Filters and filter cabinets must be field supplied or obtained cabinets are shown in Figures 25 and 26 respectively. See from the manufacturer. The manufacturer has bottom filter Figure 27 for floor cutout dimensions for bottom filter cabinets, side filter cabinets and downflow filter kits cabinet.

  • Page 22: Section 14. Checks Before Starting Furnace

    SECTION 14. CHECKS BEFORE STARTING FURNACE Before starting furnace for the first time, be sure you can answer "Yes" to each of these questions: Is furnace properly equipped to operate with available fuel? Is furnace level? Have you cleared away all loose construction and insulation materials? furnace installed...

  • Page 23: Section 16. Manifold Pressure Adjustment

    CHECKING GAS SUPPLY PRESSURE Slowly open 1/8" NPT manual shut-off valve leading to manometer. Turn off gas at equipment shut-off valve in gas supply Read manifold pressure on manometer. line just ahead of furnace. Adjust manifold pressure by turning gas control Remove inlet pressure plug from gas control.
  • Page 24 Let furnace warm up for 6 minutes. 2 percent. See Section 16, "Manifold Pressure Adjustment." If you cannot get rated input with Locate gas meter. Determine which dial has the least manifold pressure within the allowable range, you must cubic feet of gas and how many cubic feet per change orifices.

  • Page 25: Section 18. Derating For High Altitude

    available which are rated for 2,000 to 4,500 feet above sea SECTION 18. DERATING FOR HIGH level. ALTITUDE SECTION 19. DETERMINING At higher altitudes, the density of the air is reduced. Therefore, for proper combustion, the quantity of gas CORRECT ORIFICE SIZE burned in the furnace must also be reduced.

  • Page 26: Section 21. Adjusting Blower Speed

    overlap the burner-mounting flange of the adjacent Turn off electricity at electrical disconnect switch burner. See Figure 29. located next to furnace. Remove original gas orifices. WARNING: To prevent electric shock, turn off Carefully, hand thread new orifices into manifold. Do electrical power to furnace before changing blower motor not cross-thread.

  • Page 27: Section 22. Measuring Duct System Static Pressure

    Table 10. Factory Heating Speed and Temperature Rise. airflow cooling mode cause poor cooling performance or air-conditioning coil freeze-up. *Gas Motor Heating **Input Size Temperature Operation High duct system static pressure is an indication of an (Btu/Hr) (H.P.) Rise Range *Speed Tap/ overly restrictive duct system.

  • Page 28: Section 23. Measuring Air Temperature Rise

    • • Blower cooling speed can be run by jumping If air temperature rise is above the temperature terminals "R" and "Y" on 24-volt terminal block rise range specified in Table 10, furnace is located on the Control. overfired or has insufficient airflow. Check gas input following the instructions in Section 17, NOTE: On cooling speed, there is a short on-delay before "Checking Gas Input Rate."...

  • Page 29: Section 25. Setting Blower Timings

    Diagnostic light labeled “FLAME” on Control should be off. Draft inducer should run and igniter should spark. Manifold pressure should remain at zero. Turn off electricity at electrical disconnect switch located next to furnace. Turn gas control switch to “ON” position. 10.

  • Page 30: Section 27. Blower Assembly Removal

    • Disconnect blower motor wires from Control. Furnace-room or closet combustion and ventilation air Figure 30. openings must be clear and free. • Remove 2 screws holding blower door in place. Furnace combustion air openings must be clear and Remove blower door. free.

  • Page 31: Section 29. Other Information And Publications

    SECTION 29. OTHER INFORMATION AND PUBLICATIONS These publications can help you install the furnace. You can usually find these at your local library or buy them directly from the publisher. Be sure to consult current edition of each standard. National Fuel Gas Code ANSI Z223.1/NFPA 54 Canadian Installation Codes CAN/CGA B149...

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