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L.B. White Therma Grow HW220 Owner's Manual And Instructions

Greenhouse heater
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Owner's Manual and Instructions
Greenhouse Heaters
Therma Grow
™
MODELS
OUTPUT (Btuh)
FUEL
Available in either
HW220
220,000
L.P. Gas Vapor
Withdrawal or
Natural Gas
Configurations.
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, toll-free,
at (800) 345-7200.
ATTENTION ALL USERS
This heater has been tested and evaluated by C.S.A. International, in
accordance with IAS U.S. Requirements for Gas-Fired Greenhouse Heaters,
for use as a direct gas-fired circulating heater for the heating of greenhouses.
If you are considering using this product for any application other than its
intended use, then please contact your fuel gas supplier, or the L.B. White
Co., Inc.
150-27595

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Summary of Contents for L.B. White Therma Grow HW220

  • Page 1 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, toll-free, at (800) 345-7200.
  • Page 3 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 800-345-7200. WARNING ■ Proper gas supply pressure must be provided to the inlet of the heater.

  • Page 4: Table Of Contents

    This manual will instruct you in the operation and care of your unit. Have your qualified installer review this manual The L.B. White Co., Inc. has a policy of continuous product with you so that you fully understand the heater and how it improvement.

  • Page 5: Heater Specifications

    Heater Specifications Model HW220 SPECIFICATIONS Propane Natural Maximum Input (BTUH) 220,000 EXHAUST FAN 550 CFM Indoor Mounting Air Exchange Requirements SHUTTERED AIR INLET 220 sq. in. Outdoor Mounting Air SHUTTERED 100 sq. in. Exchange Requirements EXHAUST OUTLET Inlet Gas Supply MAX.

  • Page 6: Safety Precautions

    Refer to the specification section and installation quarters. instructions of the heater’s Owner’s Manual, heater dataplate, or contact the L.B. White Company to ■ Do not use in areas without proper air exchange. See determine air exchange requirements of the heater.
  • Page 7 12. Always turn off the gas supply to the heater if the heater is not going to be used. 2. All installations and applications of L.B. White heaters must meet all relevant local, state and national 13. Heaters requiring 230 volts electrical supply must codes.

  • Page 8: Installation Instructions

    Contact your gas supplier, or the This greenhouse heater has been specifically developed for L.B. White Co., Inc. if you have any questions. very low levels of these combustion by-products. However, it is necessary to have an exchange of air within the 5.

  • Page 9: Air Discharge Diverter Duct

    -- Stand clear while the main burner ignites to withdrawal system or application. If you are in doubt, prevent injury caused from hidden leaks that could contact the L.B. White Co., Inc. cause flashback. -- With the main burner in operation, check all 15.

  • Page 10: Air Inlet

    INDOOR VENTILATION REQUIREMENTS This heater requires a properly sized, motorized air inlet FIG. 4b shutter and exhaust fan for indoor installation. These Underside View components, along with specific instructions, are provided in indoor ventilation kit # 25985. INTERIOR EXTERIOR Air Inlet Locate the air inlet directly beneath the heater and align it to the heaters air inlet for combustion air supply.

  • Page 11: Exhaust Fan

    E E xhaust Fan FIG. 5 The exhaust fan must be located at an upper area of the EXHAUST FAN IN UPPER AREA OF end wall opposite from the heater, preferably in an area GREENHOUSE higher than the heater’s discharge. See Fig. 5. The fan does not need to be directly in line to the heater.

  • Page 12: Sediment Trap Assembly Instructions

    SEDIMENT TRAP ASSEMBLY Assemble the tee, nipples and cap together and tighten FIG. 8 securely. See Fig. 8. The sediment trap assembly must always be mounted in a vertical position. Make sure pipe NIPPLE thread compound that is resistant to both L.P. gas and HOSE ADAPTER natural gas is used in making all connections.

  • Page 13: Start-Up Instructions

    Start-Up Instructions Follow steps 1 - 6 on initial start-up after heater installation LED is visible through the plastic window of the by a qualified gas heater service person. For normal start- control box. A constant light from the LED is an up, simply turn thermostat above room temperature.

  • Page 14: Cleaning Instructions

    L.B. White Co., Inc. Dataplates, start- up and shut-down instructions and warnings are 4. Regulators can wear out and function improperly.

  • Page 15: 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 -- Reconnect the electrical supply and open fuel heater has been shut down.

  • Page 16: Air Proving Switch

    AIR PROVING SWITCH 1. Remove two sheet metal screws holding air proving FIG. 12 NUTS switch assembly to blower housing. Remove assembly by turning switch assembly 90 degrees so PADDLE the switch paddle can be pulled through oblong hole on side of fan housing. See Fig. 12. Disconnect the leads from the air proving switch.

  • Page 17: Gas Pressure Checks

    Gas Pressure Checks 2. Securely connect a pressure gauge to each pressure WARNING tap. ■ Do not disassemble the gas control valve. 3. Open the fuel supply valves to the heater and ■ Do not attempt to replace any components of the gas reconnect the heater electrical supply.

  • Page 18: Igniter And Flame Sensor

    IGNITER ■ 1. Disconnect the plastic male and female plugs Handle the igniter by its ceramic base, or by its leads. located at the end of the igniter leads. See Fig. 17. ■ Center the igniter shield over the igniter element, making sure the shield does not touch the igniter 2.

  • Page 19: Troubleshooting Instructions

    Troubleshooting Instructions OP P ERATION SEQUENCE: READ THIS ENTIRE SECTION BEFORE BEGINNING TO -- Line voltage is sent to motor relay and transformer TROUBLESHOOT PROBLEMS. -- Terminal at transformer branches off line voltage to terminal L1 on ignition control. WARNING -- Transformer reduces line voltage to 24 VAC.
  • Page 22 2 2 1...
  • Page 23 2 2 2...
  • Page 24 2 2 3...

  • Page 25: Electrical Connection And Ladder Diagram

    Electrical Connection and Ladder Diagram 115 Volt Supply 2 2 4...

  • Page 26: 230 Volt Supply

    230 Volt Supply 2 2 5...

  • Page 27: Heater Component Function

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

  • Page 28: Parts Identification (Parts List & Schematic)

    Parts Identification PARTS SCHEMATIC 2 2 7...

  • Page 29: Parts List

    Parts Identification PARTS LIST Item Description Part Number Regulator LP Gas 06553 Natural Gas 24414 Valve, Manual Shut Off with Nipple 03399 Hose, 1/2 x 10 ft., Rigid x Swivel 20714 Adapter, Hose, 1/2 NPT x 1/2 NPS 25873 Kit, Sediment Trap 00815 Screws (2) 572502...

  • Page 30: Warranty Policy

    12 months from date of shipment from L.B. White. the end user, any component is found to be defective, 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.

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