L.B. White AW250 Owner's Manual And Instructions
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L.B. White AW250 Owner's Manual And Instructions

Agricultural animal confinement building heaters
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Owner's Manual and Instructions
Agricultural Animal Confinement Building Heaters
Congratulations!
You have purchased the finest agricultural building heater available.
Your new L.B. White heater incorporates the benefits from the most experienced
manufacturer of heating products using state-of-the-art technology.
We, at L.B. White, thank you for your confidence in our products and
welcome any suggestions or comments you may have......call us, at
001-608-783-5691.
ATTENTION ALL USERS
This heater has been designed and developed as a direct gas-fired circulating heater
for the heating of agricultural animal confinement buildings, and is approved for
indoor or outdoor mounting. The heater has been evaulated by Novida Testing
Services and conforms to the relevant requirements of SANS 1539:2008. If you are
considering using this product for any application other than it's intended use, contact
your local agent or the L. B. White Co., Inc. in the U.S.A. at 001-608-783-5691.
MODELS
OUTPUT
AW250
73.3 kW
FUEL
LPG
150-28063 REV.A

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Summary of Contents for L.B. White AW250

  • Page 1 Your new L.B. White heater incorporates the benefits from the most experienced for L.B.White heaters.* manufacturer of heating products using state-of-the-art technology. We, at L.B. White, thank you for your confidence in our products and *Requires an app like QR Droid for Android or QR Reader for iPhone.
  • Page 2 Save this Owner’s Manual for future use and reference. ■ Owner’s Manuals and replacement labels are available at no charge. For assistance, contact L.B. White at 001-608-783-5691. WARNING ■ Proper gas supply pressure must be provided to the inlet of the heater.

  • Page 3: Table Of Contents

    Table of Contents SECTION PAGE General Information ..............3 Heater Specifications .

  • Page 4: Heater Specifications

    Heater Specifications Model AW250 SPECIFICATIONS Fuel Type Maximum Input per Hour 73.3 kW Ventilation Air Required 1,885 to Support Combustion (m3/hour) Inlet Gas Supply 3.36 MAX. Pressure Acceptable at the Inlet of the Heater for Purpose 2.74 MIN. of Input Adjustment (kPa) Burner Manifold Pressure 2.24...

  • Page 5: Safety Precautions

    Safety Precautions WARNING Asphyxiation Hazard ■ Do not use this heater for heating human living White Company to determine combustion air ventilation quarters. requirements of the heater. ■ ■ Do not use in unventilated areas. Lack of proper ventilation air will lead to improper combustion.
  • Page 6 Safety Precautions 1. Do not attempt to install, repair, or service this heater 8. Do not block air intakes or discharge outlets of the or the gas supply line unless you have continuing appliance. Doing so may cause improper combustion expert training and knowledge of gas heaters.

  • Page 7: Installation Instructions

    Installation Instructions GENERAL 8. All gas pressure regulators must be installed in strict WARNING accordance with the manufacturer’s safety Fire or Explosion Hazard. instructions. These instructions accompany each Can cause property damage, severe injury or death. regulator. ■ Disconnect power supply before wiring to prevent 9.
  • Page 8 -- If a leak is detected, check the components 17. This heater is configured for use with either L.P. vapor involved for cleanliness in the thread areas and withdrawal only. Do not use the heater in an L.P. gas proper application of pipe compound before liquid withdrawal system or application.

  • Page 9: Air Diverter Installation Instructions

    AIR DIVERTER INSTALLATION INSTRUCTIONS (Appearance of the outlet on heater may vary from model to model.) 1. Air diverters can be installed in the heater outlet to FIG.1 (Typical installation allowing two directions of air movement.) provide direction to the heated air as it exits the heater.

  • Page 10: Sediment Trap Assembly

    SEDIMENT TRAP ASSEMBLY Assemble the tee, nipples and cap together and tighten FIG. 4 securely. The sediment trap assembly must always be NIPPLE mounted in a vertical position. Use pipe thread compound HOSE ADAPTER that is resistant to LPG. Check all connections for gas leaks using approved gas leak detectors.

  • Page 11: Start-Up Instructions

    Start-Up Instructions Follow steps 1 - 6 on initial start-up after heater installation emitting diode (LED). This LED indicates the status of by a qualified gas heater service person. For normal start- the heater. The LED is visible external of the control up, simply set the thermostat above room temperature.

  • Page 12: Cleaning Instructions

    Cleaning Instructions WARNING Fire, Burn, and Explosion Hazard ■ This heater contains electrical and mechanical components in the gas management, safety and airflow systems. ■ Such components may become inoperative or fail due to dust, dirt, wear, aging, or the corrosive atmosphere of an animal confinement building.

  • Page 13: Service Instructions

    Service Instructions GENERAL 4. The thermostat, and high limt switch can be tested by WARNING jumpering the suspect part out of the electrical Burn Hazard ■ circuit.: Heater surfaces are hot for a period of time after the heater has been shut down. -- Reconnect the electrical supply and open fuel ■...

  • Page 14: Air Proving Switch With Paddle

    AIR PROVING SWITCH WITH PADDLE 1. Open the case access panel on the control box end of NUTS the heater. FIG. 8 PADDLE 2. Remove the two (2) sheet metal screws holding the switch with bracket to blower housing. Remove the assembly by turning the switch assembly 90°so the paddle on the switch arm can be pulled through the oblong hole on side of fan housing.

  • Page 15: Igniter

    IGNITER 1. See Fig. 10 for dissassembly. 4. Tighten the mounting screws snugly. 2. Position the replacement igniter so its lip and - Do not overtighten the igniter. Overtightening can mounting slot and screw hole of igniter bracket. cause cracks in igniter base, leading to failure. 3.

  • Page 16: Gas Pressure Checks

    Gas Pressure Checks 3. Open the fuel supply valves to the heater and WARNING reconnect the heater electrical supply. ■ Do not disassemble the gas control valve. 4. Start the heater ■ Do not attempt to replace any components of the gas C.

  • Page 17: Troubleshooting Guide

    Troubleshooting Guide Refer to the system operation sequence in this section to READ THIS ENTIRE SECTION BEFORE gain an understanding as to how the equipment operates BEGINNING TO TROUBLESHOOT PROBLEMS. during a call for heat. Understanding the operation sequence of the ignition module and related components is WARNING essential as it will relate directly to problem solving provided Electrical Shock and Burn Hazard...
  • Page 18 OPERATION SEQUENCE: IGNITION TRIAL SEQUENCE: -- Line voltage is sent to transformer -- First trial for ignition takes approximately 20 seconds -- Terminal at transformer branches off line voltage to -- Two more ignition trials occur terminal L1 on ignition control. -- Second trial immediatley follows if first trial failed.

  • Page 24: Electrical Connection And Ladder Diagram

    Electrical Connection and Ladder Diagram CAUTION Always refer to the heater’s electrical connection diagram when servicing to avoid wiring errors and heater malfunction. Check for proper operation after servicing. WARNING: THIS HEATER MAY START AT ANY TIME L.E.D. INDICATOR IGNITER HIGH LIMIT FLAME TRANSFORMER...

  • Page 25: Heater Component Function

    Heater Component Function Air Proving Switch Hot Surface Igniter Safety device used to insure that the proper air flow is being Electrical ignition device used on automatic ignition control achieved before the gas valve is opened. systems. Ignites gas by surface temperature rather than by spark or flame.

  • Page 26: Parts Identification

    Parts Identification PARTS SCHEMATIC...

  • Page 27: Parts List

    PARTS LIST Item Description Part Number Regulator, 1/2 NPT, LP Gas, 2nd Stage Vent Over Outlet 06553* Regulator, 1/2 NPT, LP Gas, 2nd Stage Vent Over Side 06665* Valve, Ball, Manual Shut Off and 1/2 NPT x 3.5" Nipple 03399* Hose, 1/2"...

  • Page 28: Warranty Policy

    L B. White. L.B. White Co., Inc. will at its option, repair or replace the defective part or heater, with a new part or heater, F.O.B., Onalaska, Wisconsin, USA.

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