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Oil Furnaces
PLB-098 LOW-BOY
KEEP THESE INSTRUCTIONS
WITH FURNACE FOR FUTURE
REFERENCE.
C
US
Hazards that will cause severe personal injury,
death or substantial property damage.
Hazards that can cause severe personal injury,
death or substantial property damage.
INSTALLER - Read all instructions before
installing. Read page 2 first. Follow all
instructions in proper order to prevent personal
injury or death.
• Consider ducting, fuel supply, venting and
installation when determining furnace location.
• Any claims for damage or shortage in shipment
must
be
transportation company by the consignee.
Do not store or use gasoline or other flammable
liquids or vapors near this furnace or any other
appliance.
Ventilate house while operating furnace for the first
time. Odors may be emitted for a brief period.
Do not alter this furnace in any way. The
manufacturer will not be liable for any damage
resulting from changes made in the field to the
furnace or its components or from improper
installation. Failure to comply could result in severe
personal injury, death or substantial property
damage.
If your furnace is shut down during the cold weather season, water pipes may freeze, burst and cause serious water
damage. Turn off the water supply and bleed the pipes
If the heater is left unattended during the cold weather season, take the following precautions:
Close the main water valve in the house and purge the pipes if possible. Open all the faucets in the house;
Ask someone to frequently check the house during the cold weather season to make sure that there is sufficient heat to
prevent the pipes from freezing. Tell this person to call an emergency number if required.
Printed on 100 % recycled paper
Hazard definitions
filed
immediately
against
Furnace Manual
Contents
Read this first! ............................................................................ 2
1. Installation.................................................................................. 3
2. Operation ................................................................................. 11
3. Maintenance ............................................................................ 12
4. Checkout procedure................................................................. 14
5. Dimensions and Ratings .......................................................... 16
6. Components and replacement parts........................................ 21
7. Owner's information ................................................................. 25
Hazards that will or can cause minor personal
injury or property damage.
Special instructions on installation, operation or
maintenance that are important but not related to
personal injury or property damage.
USER - Please read the following. Failure to
comply could result in severe personal injury, death
or substantial property damage.
This manual is for the sole use by your
qualified
technician.
Please see the Owner's information only, on
the back page of this manual.
the
Have the furnace serviced by a qualified service
technician, at least once a year.
This manual must only be used by a qualified
heating installer / service technician. Furnace and
burner must be installed and serviced only by a
qualified heating installer / service technician.
Failure to comply could result in severe personal
injury, death or substantial property damage.
When calling or writing about the furnace - Please
indicate furnace model number and serial number
from rating label. You may list the serial number and
model number in the space provided on the
"Installation and service certificate" found on page
15.
heating
installer
/
service
Page
11/13

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Summary of Contents for Williamson-Thermoflo PLB-098 LOW-BOY

  • Page 1: Table Of Contents

    Oil Furnaces PLB-098 LOW-BOY KEEP THESE INSTRUCTIONS Furnace Manual WITH FURNACE FOR FUTURE REFERENCE. Contents Page Read this first! ................2 1. Installation.................. 3 2. Operation ................. 11 3. Maintenance ................12 4. Checkout procedure..............14 5. Dimensions and Ratings ............16 6.
  • Page 2: Read This First

    READ THIS FIRST! Failure to adhere to the guidelines below can result in severe personal injury, death or substantial property damage. Service and maintenance – 14. Do not operate furnace if temperature rise through heat exchanger exceeds 85°F. To avoid electric shock, disconnect electrical supply before 15.
  • Page 3: Installation

    PLB-098 – Furnace Manual Oil Furnaces 1. INSTALLATION The unit is shipped with a burner and its controls. It requires a The unit must be installed in an area where the ambient and return 115VAC power supply to the control panel and thermostat hook-up air temperatures are above 15°C (60°F).
  • Page 4: Electrical System

    PLB-098 – Furnace Manual Oil Furnaces 1.2. ELECTRICAL SYSTEM The exterior of the unit must have an Figure 4: Thermostat Wiring-Heating & Air uninterrupted ground to minimize the risk of Conditioning/HeatPump - With ECM Variable Speed bodily harm, if ever an electrical problem Motor develops.
  • Page 5: Masonry Chimney

    PLB-098 – Furnace Manual Oil Furnaces 1.5. VENTING Poisonous carbon monoxide gas, fire and This device is designed to detect the insufficient evacuation of explosion hazard. combustion gases in the event of a vent blockage. In such a case Read and follow all instructions in this section. the thermal switch will shut down the oil burner.
  • Page 6: Oil Tank

    PLB-098 – Furnace Manual Oil Furnaces Figure 7: BVSO Wiring (OPTIONAL) The following areas or types of structures may contain or be exposed to certain substances, potentially requiring outside air for combustion: Commercial buildings; Buildings with indoor pools; Furnaces installed near chemical storage areas. Exposure to the following substances: Permanent wave chemicals for hair;...
  • Page 7 PLB-098 – Furnace Manual Oil Furnaces 1.9. CONNECT SUPPLY AND RETURN Always check size existing ducts, DUCTS particularly if you are adding air conditioning. The air pressure loss through the cooling 1.9.1. Duct sizing evaporator coil reduces available airflow. If the ducts are too small as well, the system may not 1.9.1.1.
  • Page 8 PLB-098 – Furnace Manual Oil Furnaces CONNECT SUPPLY AND RETURN DUCTS (continued) 1.9.1 Duct sizing (continued) Table 3: Typical duct sizing for systems not over 100 feet equivalent length – round or rectangular galvanized Typical duct sizing (For approximately 0.10 inch w.c. in a typical residential installation of galvanized metal duct) Rectangular duct equivalent sizes Round Minimum width (inches) for duct heights (inches) of :...
  • Page 9 PLB-098 – Furnace Manual Oil Furnaces CONNECT SUPPLY AND RETURN DUCTS (continued) 1.9.1 Duct sizing (continued) Table 4: Typical duct sizing for systems not over 100 feet equivalent length – round or flat oval galvanized Typical duct sizing (For approximately 0.10 inch w.c. in a typical residential installation of galvanized metal duct) Flat oval duct equivalent sizes Round Minimum width (inches) for duct heights (inches) of :...
  • Page 10: Air Filter

    PLB-098 – Furnace Manual Oil Furnaces 1.9.2. Ducting 1.11. SUPPLY AIR ADJUSTMENTS (ECM VARIABLE-SPEED MOTORS) Poisonous carbon monoxide gas hazard. DO NOT draw return air from inside a closet or On units equipped with ECM variable speed blower motors, the air utility room.
  • Page 11: Operation

    PLB-098 – Furnace Manual Oil Furnaces 1.12. INSTALLATION OF ACCESSORIES The oil supply valve is open; The burner ‘’Reset’’ button is well pushed in or re-armed; Electrical shock hazard. The preliminary air adjustments on the burner comply with the Turn OFF electrical power at the fuse box or technical specifications in this manual;...
  • Page 12: Maintenance

    PLB-098 – Furnace Manual Oil Furnaces Pierce a test hole in the flue pipe, approximately 18 inches from 2.3.8. Limit Control Check the furnace breech. Insert the smoke test probe into the hole. After operating the furnace for at least 15 minutes, restrict the return For installation using a sidewall venting, use the orifice air supply by blocking the filters or the return air register and allow provided on the breech plate;...
  • Page 13: Cleaning Of The Burner Head

    PLB-098 – Furnace Manual Oil Furnaces 3.2. CLEANING THE BLOCKED VENT SHUT-OFF DEVICE (BVSO) (IF INSTALLED) For continuous safe operation, the Blocked Vent Shut-off device (BVSO) must be inspected and maintained annually by a qualified service technician. Disconnect power to the appliance; Remove the two screws holding on the BVSO assembly cover and remove the cover;...
  • Page 14: Checkout Procedure

    PLB-098 – Furnace Manual Oil Furnaces 4. CHECKOUT PROCEDURE Furnace selection Furnace operation ...1. Heat loss ....... BTU/h at .... °F ..17. Is a / are clean air filter(s) in place? outdoor design temperature. ..18. Was the temperature rise through furnace checked (not ...2.
  • Page 15 PLB-098 – Furnace Manual Oil Furnaces 4. CHECKOUT PROCEDURE (continued) Installation and service certificate Furnace model Series ___________________________________________________ _______________________ Serial number Date installed _______________________________________ _____________________________ Installation instructions have been followed. Checkout sequence has been performed. Above information is certified to be correct. Information received and left with owner/maintenance person.
  • Page 16: Dimensions And Ratings

    PLB-098 – Furnace Manual Oil Furnaces 5. DIMENSIONS AND RATINGS Table 10: Model PLB-098 & PLB-098-VS Dimensional data – ALL DIMENSIONS IN INCHES Furnace casing Warm air supply (top) Return air supply (side) Flue pipe Model diam. Width Depth Height Width Depth Width...
  • Page 17 PLB-098 – Furnace Manual Oil Furnaces 5. DIMENSIONS AND RATINGS (continued) Table 11: Model PLB-098 & PLB-098-VS Burner data BECKET BURNER; MODEL AFG (Chimney) Pump Input Nozzle Burner tube Firing rate AFUE Low firing Static Head/Air pressure Model BTU/h (Delavan) Head insertion USGPH...
  • Page 18 PLB-098 – Furnace Manual Oil Furnaces 5. DIMENSIONS AND RATINGS (continued) Table 12: Airflow Data, Models with 1/3 HP PSC motors EXTERNAL STATIC PRESSURE WITH AIR FILTER BLOWER SPEED 0.2" (W.C.) 0.3" (W.C.) 0.4" (W.C.) 0.5" (W.C.) 0.6" (W.C.) 0.7" (W.C.) HIGH 1420 1335...
  • Page 19 PLB-098 – Furnace Manual Oil Furnaces 5. DIMENSIONS AND RATINGS (continued) Figure 9: Wiring Diagram - 4 Speed Motor (PSC) 11/13...
  • Page 20 PLB-098 – Furnace Manual Oil Furnaces DIMENSIONS AND RATINGS (continued) Figure 10: Wiring Diagram - Variable Speed Motor (ECM) 11/13...
  • Page 21: Components And Replacement Parts

    PLB-098 – Furnace Manual Oil Furnaces COMPONENTS AND REPLACEMENT PARTS Figure 11: Parts List - With 4 Speed motor PSC B50126A 11/13...
  • Page 22 PLB-098 – Furnace Manual Oil Furnaces COMPONENTS AND REPLACEMENT PARTS (continued) Table 14: Parts List - With 4 Speed motor PSC ITEM PART # DESCRIPTION COMMENTS B03540 HEAT EXCHANGER ASSEMBLY Heat exchanger only J06L002 EXTRUDED JOINT 1/4 X 1/8 X 25' B03570 FLOOR ASSEMBLY B03561...
  • Page 23 PLB-098 – Furnace Manual Oil Furnaces COMPONENTS AND REPLACEMENT PARTS (continued) Figure 12: Parts List - With variable speed motor ECM B50127A 11/13...
  • Page 24 PLB-098 – Furnace Manual Oil Furnaces 6. COMPONENTS AND REPLACEMENT PARTS (continued) Table 15: Parts List - With variable speed motor ECM ITEM PART # DESCRIPTION COMMENTS B03540 HEAT EXCHANGER ASSEMBLY Heat exchanger only J06L002 EXTRUDED JOINT 1/4 X 1/8 X 25' B03570 FLOOR ASSEMBLY B03561...
  • Page 25: Owner's Information

    PLB-098 – Furnace Manual Oil Furnaces OWNER’S INFORMATION The furnace must be inspected and started ANNUALLY, at the beginning of the heating season, only by a qualified service technician. The service technician must perform annual service and maintenance on the furnace to ensure reliable operation. Failure to service and maintain the furnace and system could result in equipment failure, causing severe personal injury, death or substantial property damage.
  • Page 26 PLB-098 – Furnace Manual Oil Furnaces X40205 Rev. B 11/13...

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