Owner's Manual and Instructions

GreenGro Plus

™

Greenhouse Heaters

MODELS

HD120

OUTPUT (Btuh)

120,000

FUEL

Available in either

L.P. Gas Vapor

Withdrawal or

Natural Gas

Configurations.

Congratulations!

You have purchased the finest direct fired greenhouse 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 1-800-345-7200.

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.

150-23487-A

GENERAL HAZARD WARNING

■ Failure to comply with the precautions and instructions provided with this heater, can result in:

— Death

— Serious bodily injury or burns

— Property damage or loss from fire or explosion

— Asphyxiation due to lack of adequate air supply or carbon monoxide poisoning

— Electrical shock

■ Read this Owner’s Manual before installing or using this heater.

■ Only properly-trained service people should repair or install this heater.

■ 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.

■ Refer to dataplate for proper gas supply pressure.

■ Gas pressure in excess of the maximum inlet pressure specified at the heater inlet can cause fires or explosions.

■ Fires or explosions can lead to serious injury, death, building damage, or plant loss.

■ Gas pressure below the minimum inlet pressure specified at the heater inlet may cause improper combustion.

■ Improper combustion can lead to asphyxiation or carbon monoxide poisoning and therefore serious injury or death to humans and plant life.

WARNING

Fire and Explosion Hazard

■ Keep solid combustibles a safe distance away from the heater.

■ Solid combustibles include wood or paper products, straw, and dust.

■ Do not use the heater in spaces which contain or may contain volatile or airborne combustibles.

■ Volatile or airborne combustibles include gasoline, solvents, paint thinner, dust particles or unknown chemicals.

■ Failure to follow these instructions may result in a fire or explosion.

■ Fire or explosions can lead to property damage, personal injury or loss of life.

■ explosion.

WARNING

Fire and Explosion Hazard

Not for home or recreational vehicle use.

■ Installation of this heater in a home or recreational vehicle may result in a fire or

■ Fire or explosions can cause property damage or loss of life.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

FOR YOUR SAFETY

If you smell gas:

1. Open windows.

2. Don't touch electrical switches.

3. Extinguish any open flame.

4. Immediately call your gas supplier.

2

Table of Contents

SECTION PAGE

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Heater Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Installation Instructions

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Air Diverter Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Indoor Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Sediment Trap Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Heater Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Manual Shut-Off Valve, Hose and Regulator Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . .12

Start-Up Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Shut-Down Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Service Instructions

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Motor & Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Air Proving Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Flapper Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Igniter & Flame Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Removing Control Box and Wire Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Testing the Manual Reset High Limit Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Gas Pressure Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Troubleshooting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Electrical Connection and Ladder Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Heater Component Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Parts Identification (Parts List & Schematic) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 & 28

Warranty Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Replacement Parts and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

General Information

This Owner's Manual includes all options and accessories commonly used on this heater. However, depending on the configuration purchased, some options and accessories may not be included.

When calling for technical service assistance, or for other specific information, always have model number, configuration number and serial number available. This information is contained on the dataplate.

This manual will instruct you in the operation and care of your unit. Have your qualified installer review this manual with you so that you fully understand the heater and how it functions.

The gas supply line installation, installation of the heater, and repair and servicing of the heater requires continuing expert training and knowledge of gas heaters and should not be attempted by anyone who is not so qualified. See page 6 for definition of the necessary qualifications.

Contact your local L.B. White distributor or the L.B. White

Co., Inc. for assistance, or if you have any questions about the use of the equipment or its application.

The L.B. White Co., Inc. has a policy of continuous product improvement. It reserves the right to change specifications and design without notice.

3

Heater Specifications

M de

HD120

SPECIFICATIONS

Propane

Gas

Natural

Gas

Maximum Input (BTUH)

Minimum Input (BTUH)

Indoor Mounting Air

Exchange Requirements (1)

EXHAUST FAN

SHUTTERED AIR INLET

Outdoor Mounting Air

Exchange Requirements (1)

SHUTTERED

EXHAUST OUTLET

Inlet Gas Supply

Pressure Acceptable at the Inlet of the Heater for Purpose of Input

Adjustment (In. W.C.)

MAX.

MIN.

MAX.

Burner Manifold

Pressure (In. W.C.)

Fuel Consumption Per

Hour

MIN.

MAX.

MIN.

13.5

11.0

5.2

1.3

5.56 lbs.

3.01 lbs.

120,000

65,000

300 CFM

120 sq. in.

120 sq. in.

11.0

7.0

3.1

0.8

120 cu. ft.

65 cu. ft.

Motor Characteristics

Ball Bearing

1/3 H.P.

1,100 RPM

Electrical Supply

(Volts/Hz/Phase)

115/60/1

Amp Draw

STARTING

CONTINUOUS

OPERATION

11.8

4.5

Dimensions (Inches)

L x W x H

30 3/4 x 18 1/4 x 28 1/4

Minimum Safe

Distances From

Nearest

Combustible

Materials

Net Weight (lbs.)

Shipping Weight (lbs.)

TOP

SIDES

BACK

BLOWER

OUTLET

GAS

SUPPLY

1 ft.

1 ft.

1 ft.

6 ft. (1.83 m)

Propane Gas Supply — 6 ft. (1.83 m)

Natural Gas Supply — N/A

116

126

(1) Air inlets and exhaust outlets must be electromechanically operated and electrically interlocked with the heater to prevent heater operation if air inlet and exhaust outlet do not open when heating is required.

4

Safety Precautions

WARNING

■ Do not use this heater for heating human living quarters.

■ Do not use in areas without proper air exchange. See air exchange requirements on page 4 or on heater’s dataplate.

■ Exhaust fans, supply air inlets, or exhaust fan outlets must not be obstructed.

■ Proper air exchange must be provided for either indoor or outdoor mount installations.

■ Refer to the specification section and installation instructions of the heater’s Owner’s Manual, heater dataplate, or contact the L.B. White Company to determine air exchange requirements of the heater.

■ Lack of proper air exchange will lead to improper combustion.

■ Improper combustion can lead to carbon monoxide poisoning in humans leading to serious injury or death.

Symptoms of carbon monoxide poisoning can include headaches, dizziness and difficulty in breathing.

FUEL GAS ODOR

man-m

If aa ggas lleak ooccurs, yyou sshould bbe aable tto ssmell tthe ffuel ggas.

SIGNAL TTO G

■ Do not take any action that could ignite the fuel gas. Do not operate any electrical switches. Do not pull any power supply or extension cords. Do not light matches or any other source of flame. Do not use your telephone.

■ Get everyone out of the building and away from the area immediately.

■ Close all propane (LP) gas tank or cylinder fuel supply valves, or the main fuel supply valve located at the meter if you use natural gas.

■ Propane (LP) gas is heavier than air and may settle in low areas. When you have reason to suspect a propane leak, keep out of all low areas.

ODOR FADING -- NO ODOR DETECTED

■ Some ppeople ccannot ssmell w man-m

Some ppeople ccannot made cchemical aadded tto must ddetermine iif yyou can ssmell tthe oodorant iin tthese ffuel ggases.

■ Learn to recognize the odor of propane (LP) gas and natural gas. Local propane (LP) gas dealers and your local natural gas supplier (utility) will be more than happy to give you a scratch and sniff pamphlet. Use it to become familiar with the fuel gas odor.

■ Smoking can decrease your ability to smell. Being around an odor for a period of time can affect your sensitivity to that particular odor.

■ Natural gas is lighter than air and can collect around rafters or ceilings.

■ Use your neighbor’s phone and call your fuel gas supplier and your fire department. Do not re-enter the building or area.

■ Stay out of the building and away from the area until declared safe by the firefighters and your fuel gas supplier.

■ FINALLY, let the fuel gas service person and the firefighters check for escaped gas. Have them air out the building and area before you return. Properly trained service people must repair the leak, check for further leakages, and then relight the appliance for you.

■ The oodorant iin ppropane ((LP) ggas aand nnatural ggas iis colorless aand tthe iintensity oof iits oodor ccan ffade uunder some ccircumstances.

■ If there is an underground leak, the movement of gas through the soil can filter the odorant.

■ Propane (LP) gas odor may differ in intensity at different levels. Since propane (LP) gas is heavier than air, there may be more odor at lower levels.

■ Always bbe ssensitive tto tthe sslightest ggas oodor. If you continue to detect any gas odor, no matter how small, treat it as a serious leak. Immediately go into action as discussed previously.

ATTENTION -- CRITICAL POINTS TO REMEMBER!

■ Propane (LP) gas and natural gas have a distinctive odor. Learn to recognize these odors. (Reference Fuel

Gas Odor and Odor Fading sections above.

■ Even if you are not properly trained in the service and repair of the heater, ALWAYS be consciously aware of the odors of propane (LP) gas and natural gas.

■ If you have not been properly trained in repair and service of propane (LP) gas and natural gas fueled heaters, then do not attempt to light heater, perform service or repairs, or make any adjustments to the heater on propane (LP) gas or natural gas fuel system.

5

■ A periodic sniff test around the heater or at the heater’s joints; i.e. hose, connections, etc., is a good safety practice under any conditions. If you smell even a small amount of gas, CONTACT YOUR FUEL GAS SUPPLIER

IMMEDIATELY. DO NOT WAIT!

1. Do not attempt to install, repair, or service this heater or the gas supply line unless you have continuing expert training and knowledge of gas heaters.

Qualifications for service and installation of this equipment are as follows: a. To be a qualified gas heater service person, you must have sufficient training and experience to handle all aspects of gas-fired heater installation, service and repair. This includes the task of installation, troubleshooting, replacement of defective parts and testing of the heater. You must be able to place the heater into a continuing safe and normal operating condition. You must completely familiarize yourself with each model heater by reading and complying with the safety instructions, labels, Owner’s Manual, etc., that is provided with each heater.

b. To be a qualified gas installation person, you must have sufficient training and experience to handle all aspects of installing, repairing and altering gas lines, including selecting and installing the proper equipment, and selecting proper pipe and tank size to be used. This must be done in accordance with all local, state and national codes as well as the manufacturer’s requirements.

2. All installations and applications of L.B. White heaters must meet all relevant local, state and national codes. Included are L.P. gas, natural gas, electrical, and safety codes. Your local fuel gas supplier, a local licensed electrician, the local fire department or similar government agencies, or your insurance agent can help you determine code requirements.

a. For U.S.A. installations and applications:

-- ANSI/NFPA 58, latest edition, Standard for

Storage and Handling of Liquefied Petroleum

Gas and/or

-- ANSI Z223.1/NFPA 54, National Fuel Gas

Code

-- ANSI/NFPA 70, National Electrical Code.

3. Do not move, handle, or service heater while in operation or connected to a power or fuel supply.

4. This heater may be installed in areas subject to washdown. This heater may only be washed on the external case assembly—see Cleaning Instructions.

Do not wash the interior of the heater. Use only compressed air, soft brush or dry cloth to clean the interior of the heater and it’s components. After external washdown, do not operate this heater until it is completely dry. In any event, do not operate the heater for at least one hour after external washdown.

5. For safety, this heater is equipped with a manual reset high-limit switch and an air proving switch.

Never operate this heater with any safety device that has been bypassed. Do not operate this heater unless all of these features are fully functioning.

6. Do not operate the heater with its door open.

7. Do not locate fuel gas containers or fuel supply hoses anywhere near the blower outlet of the heater.

8. Do not block air intakes or discharge outlets of the heater. Doing so may cause improper combustion or damage to heater components leading to property damage or plant loss.

9. The hose assembly shall be visually inspected on an annual basis. If it is evident there is excessive abrasion or wear, or if the hose is cut, it must be replaced prior to the heater being put into operation.

The hose assembly shall be protected from building materials and contact with hot surfaces during use.

The hose assembly shall be that specified by the manufacturer. See parts list.

10. Check for gas leaks and proper function upon heater installation, at beginning of heating season or when relocating.

11. This heater should be inspected for proper operation by a qualified service person before the start of fall heating season and at least annually.

12. Always turn off the gas supply to the heater if the heater is not going to be used.

13. This heater is equipped with a three-prong

(grounding) plug for your protection against shock hazard and must be plugged directly into a properly grounded three-prong receptacle. Failure to use a properly grounded receptacle can result in electrical shock, personal injury, or death.

14. Direct ignition heaters will make up to three trials for ignition. If ignition is not achieved, the control system will lock out the gas control valve. If gas is smelled after system lock out has occurred, immediately close all fuel supply valves. Do not relight until you are sure that all gas that may have accumulated has cleared away. In any event, do not relight for at least 5 minutes.

15. In a hanging type installation, rigid pipe or copper tubing coupled directly to the heater may cause gas leaks during movement, and therefore must not be used. Use only gas hose assemblies that are rated and approved for L.P.gas and natural gas in a hanging type of installation.

16. Installations not using the gas hose supplied with this appliance must connect dimensionally using

American National Standard Wrought Steel and

Wrought Iron Pipe B36/10-1970. (Aluminum piping or tubing shall not be used.) Copper tubing when used for conveying natural gas, shall be internally tinned or equivalently treated to resist sulphur.

6

Installation Instructions

GENERAL

Direct fired heaters discharge combustion by-products with the heated air in to the area being heated. These include

CO, CO

2

, NO, NO

2

, and Ethylene. These gases can result in harm to the worker or the plants.

The GreenGro greenhouse heater has been specifically developed for very low levels of these combustion byproducts. However, it is necessary to have an exchange of air within the greenhouse to avoid accumulation of these gases to a harmful level over an extended period of operating time.

Greenhouses have a natural air leakage factor. This natural leakage is influenced by the design and physical condition of the greenhouse as well as wind conditions and other factors. This natural leakage factor can not be relied upon as being sufficient to provide the necessary air exchange within the greenhouse. Proper installation of the GreenGro greenhouse heater must include provision for adequate air exchange as follows:

-- An exhaust fan capable of providing at least

300 cfm of discharge air.

-- An inlet shuttered louver of at least 120 sq. in. area.

-- The inlet shutters must be electromachanically operated and electrically interlocked with the heater such that the heater can not operate if the inlet shutters do not open when heating is required.

7

-- An exhaust shuttered louver of at least 120 sq. in.

area.

-- The exhaust shutter must be electromechanically operated and electrically interlocked with the heater such that the heater can not operate if the exhaust shutters do not open when heating is required.

1. Read all safety precautions and follow L. B. White recommendations when installing this heater. If during the installation or relocating of heater, you suspect that a part is damaged or defective, call a qualified service agency for repair or replacement.

2. Make sure the heater is properly positioned before use and is hung level. Observe and obey all minimum safe distances of the heater to the nearest combustible materials. Minimum safe distances are given on the heater nameplate and on page 4 of this manual.

3. The heater may be used either indoors or outdoors.

For heaters intended for outdoor installation, the heater is to be installed at least 18 inches above the ground or to a height that would prevent snow blockage of heater’s air inlet. Refer to instructions provided in the optional L.B. White outdoor mounting and ducting kit, part number 23578.

4. The heater must have the proper gas regulator installed for the application. A regulator must be connected to the gas supply so that gas pressure at the inlet to the gas valve is regulated within the range specified on the dataplate at all times. Contact your gas supplier, or the

L.B. White Co., Inc. if you have any questions.

5. The heater’s gas regulator (with pressure relief valve) should be installed outside of building. Any regulators inside the buildings must be properly vented to the outside. Local, state and national codes always apply to regulator installation. Natural gas regulators with vent limiting device may be mounted indoors without venting to outdoors.

6. All gas pressure regulators must be installed in strict accordance with the manufacturer’s safety instructions.

These instructions accompany each regulator.

7. Insure that all accessories that ship within the heater have been removed from inside of heater and installed. This pertains to air diverters, hose, regulators, etc.

8. Make certain that a sediment trap is installed at the gas valve inlet to prevent foreign materials (pipe compound, pipe chips and scale) from entering the gas valve. Debris blown into the gas valve may cause that valve to malfunction resulting in a serious gas leak that could result in a possible fire or explosion causing loss of products, building, or even life. A properly installed sediment trap will keep foreign materials from entering the gas valve and protect the safe functioning of that important safety component.

9. Any heater connected to a piping system must have an accessible, approved manual shut off valve installed within six feet (6 ft.) of the heater it serves.

10. Check all connections for gas leaks using approved gas leak detectors. Gas leak testing is performed as follows:

WARNING

■ Do not use open flame (matches, torches, candles, etc.) in checking for gas leaks.

■ Use only approved leak detectors.

■ Failure to follow this warning can lead to fires or explosions.

■ Fires or explosions can lead to property damage, personal injury or loss of life.

-- Check all pipe connections, hose connections, fittings and adapters upstream of the gas control with approved gas leak detectors.

-- In the event a gas leak is detected, check the components involved for cleanliness and proper application of pipe compound before further tightening.

-- Furthermore tighten the gas connections as necessary to stop the leak.

-- After all connections are checked and any leaks are stopped, turn on the main burner.

-- Stand clear while the main burner ignites to prevent injury caused from hidden leaks that could cause flashback.

-- With the main burner in operation, check all connections, hose connections, fittings and joints as well as the gas control valve inlet and outlet connections with approved gas leak detectors.

-- If a leak is detected, check the components involved for cleanliness in the thread areas and proper application of pipe compound before further tightening.

-- Tighten the gas connection as necessary to stop the leak.

-- If necessary, replace the parts or components involved if the leak cannot be stopped.

-- Ensure all gas leaks have been identified and repaired before proceeding.

11. A qualified service agency must check for proper operating gas pressure upon installation of the heater.

12. Light according to instructions on heater or within owner's manual.

13. It is extremely important to use the proper size and type of gas supply line to assure proper functioning of the heater. Contact your fuel gas supplier for proper line sizing and installation.

14. This heater can be configured for use with either L.P.

gas vapor withdrawal or natural gas. Consult the dataplate for the gas configuration of the specific heater. Do not use the heater in an L.P. gas liquid withdrawal system or application. If you are in doubt, contact the L.B. White Co., Inc.

15. Eventually, like all electrical/mechanical devices, the thermostat can fail. Thermostat failure may result in either an underheating or overheating condition which may damage or kill plants. Plants should be protected by a separate back-up control system that limits high and low temperatures and also activates appropriate alarms.

16. Take time to understand how to operate and maintain the heater by using this Owner’s Manual. Make sure you know how to shut off the gas supply to the building and also to the individual heater. Contact your fuel gas supplier if you have any questions.

17. Any defects found in performing any of the service or maintenance procedures must be eliminated and defective parts replaced immediately. The heater must be retested by properly qualified service personnel before placing the heater back into use.

18. Do not exceed input rating stamped on the dataplate of the heater. Do not exceed the burner manifold pressure stated on the dataplate. Do not use an orifice size different than specified for the specific input rating of this heater, fuel type configuration and altitude.

1. Optional air diverters can be installed in the heater outlet to provide direction to the heated air as it exits the heater. Installation options include installing the diverters in such a way as to broadly distribute the air in two 45 degree paths or to focus the air flow in one

45 degree direction. See Fig. 1.

2. The air diverters may require hand forming prior to installation. Make 90 degree bends utilizing the performations provided. Diverter should then have the shape shown in Fig. 1.

3. The air diverter’s tabs on each half will pop into the blower outlet between the inside of the case assembly and the blower housing outlet. If the notched tabs do not pop into the blower outlet, loosen

(do not remove) the blower outlet screws. Doing this provides a gap into which you can insert the tabs.

Retighten the screws after installation.

(Optional accessory on some models.)

(Appearance of the outlet on heater may vary from model to model.)

FIG. 1

(Typical installation allowing two directions of air movement.)

NOTCHES IN MOUNTING TABS

TABS

DIVERTER

HALVES

OUTLET

SCREWS

FORMED

OUTLET GUARD

Alternate Air Diverter Installations

8

INDOOR INSTALLATION INSTRUCTIONS

This heater may be mounted within the greenhouse for indoor heating applications. The heater may be installed on an optional indoor mounting bracket kit, part number

23651, which is installed on freestanding supports or mounted directly to the structure’s wall. Separate installation instructions accompany the kit.

The heater may also be suspended by chain to the greenhouse’s overhead structure by using an optional chain hanging kit, part number 08748. Refer to the following instructions and illustrations.

1. Assemble eyebolts and chain according to the illustration and tighten all eyebolts securely.

See Fig. 2.

FIG. 2

EYEBOLT

NUT

FLAT WASHER

CHAIN

2. Be sure heater is securely fastened to overhead supports and is hanging level. (Check crosswise and lengthwise.)

3. See Fig. 3 for typical indoor installation. In any installation, consideration must be given to making sure the heater is located away from the people entering or exiting the greenhouse so they cannot accidentally knock the heater or tamper with the heater and its gas supply line in any way. Additionally, the heater must be located so that it does not block the normal entryway or exit of the building. Make sure you observe and obey minimum clearance distances to combustible materials as stated in the specification section of this owner’s manual and on the heater’s dataplate.

CAGE NUT CASE TOP

FIG. 3

POWERED EXHAUST FAN

ENTRY/EXIT

AIR FLO

W

HEATER

(SUPPORTED BY

METAL FRAME

OF GREENHOUSE)

CHAIN/CABLE

1 FT. CLEARANCE

(BACK OF HEATER TO WALL)

SHUTTERED AIR

INLET

GAS HOSE

SEDIMENT TRAP

MANUAL SHUTOFF VALVE

SECOND STAGE

REGULATOR

(VENT POINTED DOWN)

GAS SUPPLY LINE

9

TO GAS CONTROL

NIPPLE

HOSE ADAPTER

TEE

NIPPLE

CAP

8 9 10

THERMOSTAT

BLACK

WHITE

YELLOW

BLUE

RED

HI LO

RED

GREEN

1. Operate on first stage heat only.

-- Remove jumper at terminals 8 and 9.

-- Connect thermostat to terminals 8 and 9.

2. Operate on second stage heat only.

-- Remove jumper at terminals 8 and 9.

-- Move jumper to terminals 9 and 10.

-- Connect controller contacts at terminals 8 and 9.

11

THERMOSTAT

8 9 10

WHITE

BLACK

WHITE

BLACK

2. Operate on second stage heat only.

-- Remove jumper at terminals 8 and 9.

-- Move jumper to terminals 9 and 10.

-- Connect thermostat to terminals 8 and 9.

THERMOSTAT

8 9 10

JUMPER

WHITE

BLACK

WHITE

BLACK

C. Building C

(Using N

1. Operate on first stage heat only.

-- Remove jumper at terminals 8 and 9.

-- Connect controller contacts in terminals 8 and 9.

8 9 10

RETURN

FROM CONTROLLER

TO CONTROLLER

FIRST STAGE HEAT CONTACT

8 9 10

RETURN

FROM CONTROLLER

TO CONTROLLER

FIRST STAGE HEAT CONTACT

3. Operate both stages of heat.

-- Remove jumper at terminals 8 and 9.

-- Connect controller contacts at terminals 8 and 9

(first stage heat).

-- Connect controller contacts at terminals 9 and 10

(second stage heat).

-- Supply an electrical connection (jumper) between relays in building control to allow staging transition of gas control valve.

8 9 10

RETURN

SECOND STAGE HEAT CONTACT

FROM CONTROLLER

RETURN

FROM CONTROLLER

TO CONTROLLER

FIRST STAGE HEAT CONTACT

D. Heat-VVent B

(Using N

-- Remove jumper at terminals 1 and 2.

HEAT MODE

-- Remove single black lead at terminal 3 to selector switch.

-- Add contacts at terminals 1 and 3.

HEAT MODE

CONTACTS

BLACK

WHITE

GREEN

POWER CORD

BLACK

HEAT

WHITE

WHITE

BLACK WHITE

VENT

SELECTOR SWITCH

TERMINAL

STRIP

1 2 3 4

JUMPER

5 6 7

BLACK

WHITE

GREEN

POWER CORD

VENT MODE

-- Remove black lead at terminal 4 to selector switch.

-- Add contacts at terminals 1 and 4.

VENT MODE

CONTACTS

BLACK

BLACK

HEAT

WHITE

WHITE

WHITE

VENT

SELECTOR SWITCH

TERMINAL

STRIP

1 2 3 4

JUMPER

5 6 7

Building C

Contacts)

-- Remove jumper at terminals 1 and 2.

-- Remove black leads at terminals 3 and 4 to selector switch.

-- Remove white leads at terminal 6 to selector switch.

-- Add neutral(s) of control contacts at terminal 5.

HEAT MODE

-- Add control power at terminal 3.

VENT MODE

-- Add control power at terminal 4.

BLACK

WHITE

GREEN

POWER CORD

TERMINAL

STRIP

1

BLACK

HEAT

WHITE

VENT

SELECTOR SWITCH NEUTRAL(S) FROM

CONTROL POWER

2 3 4 5

JUMPER

6 7

1. Always use approved pipe thread compound suitable for use with L.P. gas or natural gas on the threaded connections.

2. Assemble the components together according to the figure. This view is to show general assembly of the components only. The regulator must always be mounted so its vent, regardless of location on the regulator, is always pointed downward.

3. Tighten all connections securely and check for gas leaks.

FIG. 5

REGULATOR VENT

TO CONTROL

VALVE INLET

REGULATOR

NIPPLE

VALVE, MANUAL

SHUT-OFF

GAS HOSE

ADAPTER

SEDIMENT TRAP

12

Start-Up Instructions

For initial start-up after heater installation, follow steps 1-6.

For normal start-up, simply set the thermostat above room temperature.

1. Connect electrical cord to an approved electrical outlet.

2. Set thermostat to desired room temperature.

3. This heater has a manually operated toggle style selector switch located on the top of the control box.

(Open the fan motor access panel to view) This switch allows you to either heat or ventilate (no heat).

See Fig. 6 for selector switch positions.

FIG. 6

HEAT

(UP)

OFF

(MID)

VENT

(DOWN) a. Open all manual fuel supply valves. Check for gas leaks using an approved leak detector. The gas control valve on the heater has a manual shut-off feature incorporated into the valve assembly. Make sure the indicator on the valve is turned to the on position. See Fig 7.

b. When the selector switch is positioned to heat, the red light on the ignition control will be on. At this point, the motor will start, the igniter will spark and ignition will occur. The heater will cycle based upon interconnected control system.

FIG. 7

OFF

ON

B. VVentilation

When the selector switch is positioned to vent, the red light will NOT be on. The fan motor will start, but the igniter will not spark, nor will ignition occur. This feature is used typically when heat is not needed, but air circulation is required. To discontinue the ventilation feature, position the switch to off or heat, or use the interconnected contacts (customer supplied) to accomplish this task.

Position the switch to midpoint.

ATTENTION

■ It is normal for air to be trapped in gas hose on new installations. The heater may attempt more than one trial for ignition before air is finally purged from line and ignition takes place.

4. The direct spark ignition (DSI) control board within this heater is self-diagnostic. The board works in conjunction with a light emitting diode (L.E.D.) built into the selector switch. The L.E.D. will flash a specific continuous flash pattern depending on a problem that occurs. Match the specific flash pattern given by L.E.D. to the troubleshooting label applied to inside of burner cap access panel of the heater. The troubleshooting label identifies the causes of the problem as it relates to specific flash pattern and remedies to correct the problem. See also

Troubleshooting Data within this Owner’s Manual.

5. The gas control valve in this heater is a two stage control. When a call for heat occurs, the valve will open to its first stage rate. Depending upon temperature requirements and temperature control setting, the valve will then either remain at first stage heat rate before the temperature control is satisfied, or the valve will open completely to its second stage capacity. If the valve opens to its second stage capacity, it is designed to revert back to its first stage heat rate before controller shuts the heater down.

6. Do not exceed input rating stamped on nameplate or manufacturer’s recommended burner orifice pressure for size orifice(s) used. Make certain that the primary air supply to main burner is open and free of dust, dirt and debris for complete, proper combustion.

13

Shut-Down Instructions

If the heater is to be shut down for cleaning, maintenance or repair, follow steps 1 - 5. Otherwise, simply turn thermostat to “off” or “no heat” for standard shut down.

1. Close all manual fuel supply valves.

2. With the heater lit, allow heater to burn off excess fuel in gas supply hose.

3. Turn the indicator on the gas control to “off”.

4. Turn thermostat to “off” or “no heat” position.

5. Disconnect the heater from the electrical supply.

Cleaning Instructions

WARNING

■ This heater contains electrical and mechanical components in the gas management, and safety systems.

■ Such components may become inoperative or fail due to dust, dirt, wear and aging.

■ Periodic cleaning and inspection as well as proper maintenance are essential to avoid serious injury or property damage.

1. Before cleaning, shut off all gas supply valves and disconnect electrical supply.

2. At least once a year give the heater a thorough cleaning, preferably before the beginning of the fall heating season. At that time, remove the fan and motor assembly and brush or blow off the fan wheel.

Additionally, ensure the burner casting and orifice are free of dust accumulation, insect nests, webs, etc.

WARNING

Do not use a pressure washer, water, or liquid cleaning solution on any heater components. Use of a pressure washer, water, or liquid cleaning solution on the control components can cause severe personal injury or property damage due to water and/or liquids:

■ In electrical components, and wires causing electrical shock or equipment failure.

■ On gas control valves causing corrosion which can result in gas leaks and fire or explosion from the leak.

Clean all internal components of the heater with pressurized air, a dry brush, or a dry cloth.

1. The area surrounding the heater shall be kept clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

2. Have your gas supplier check all gas piping annually for leaks or restrictions in gas lines.

3. Regulators must be periodically inspected to make sure the regulator vents are not blocked. Debris, insects, insect nests, snow, or ice on a regulator can block vents and cause excess pressure at the heater.

4. Regulators can wear out and function improperly.

Have your gas supplier check the date codes on all regulators installed and check delivery pressures to the heater to make sure that the regulator is reliable.

Maintenance Instructions

5. Check all wiring associated terminals and electrical components within the heater for corrosion, frayed or cut insulation, tight connections, etc. Repair or replace as necessary.

6. Review all heater markings (i.e. wiring diagram, warnings, start-up, shut-down, troubleshooting, etc.) at the time of maintenance for legibility. Make sure none are cut, torn, or otherwise damaged. Any damaged markings must be replaced immediately by contacting the L.B. White Co., Inc. Dataplates, startup and shut-down instructions and warnings are available at no cost. A nominal charge will be applied for wiring diagrams.

14

Service Instructions

GENERAL

WARNING

■ Heater surfaces are hot for a period of time after the heater has been shut down.

■ Allow the heater to cool before performing service, maintenance, or cleaning.

■ Failure to follow this warning will result in burns causing injury.

WARNING

■ Do not disassemble or attempt to repair any component part of the heater, including regulators and gas hoses.

■ All components must be replaced if defects are found.

■ Failure to follow this warning will result in gas leaks.

■ Gas leaks cause fire or explosions, leading to property damage, injury, or death.

MOTOR AND FAN WHEEL ASSEMBLY

1. Open the motor end access panel, and disconnect the motor leads.

2. Remove the motor mounting plate screws and pull the fan and motor assembly from the housing.

3. Loosen the square head set screw(s) on the fan wheel.

4. Pull the fan wheel from the motor shaft. Use a wheel puller if necessary.

5. Remove the four (4) nuts securing the motor to the mounting plate.

FIG. 8

1. Close the fuel supply valve to the heater and disconnect the heater’s electrical supply before servicing unless it is necessary to have the valve open and electrical supply connected for your service procedure.

2. For reassembly, reverse the respective service procedure. Ensure gas connections are tightened securely.

3. After servicing, start the heater to ensure proper operation and check for gas leaks.

4. Clean tthe hheater’s bburner oorifice w or aa ssoft, ddry rrag. D the oorifice hhole. D may eenlarge tthe hhole, causing ccombustion oor iignition pproblems. R the oorifice iif iit ccannot bbe ccleaned pproperly.

Replace

NOTES: a. Fan wheel to motor mount plate spacing must be adjusted to the clearance specified in the table below before tightening the fan wheel to the motor shaft.

b. Make sure that set screw(s) of the fan are on the flats of motor shaf t when tightening.

MOTOR MOUNT PLATE

FAN WHEEL

AIR PROVING SWITCH

1. Open the motor end access panel and disconnect the air-proving switch leads.

2. Remove the air proving switch mounting nuts and pull the switch from the fan housing panel.

3. The replacement switch includes appropriate quantity of mounting screws and nuts. Slide the switch onto the screws and secure into place with the two nuts.

4. Reconnect the heater to its electrical supply and open the fuel supply valves to the heater.

15

5. Close and latch the access panel. Start the heater and check for proper operation.

FIG. 9

NUTS (4)

MOTOR

SWITCH

NUTS (2)

CLEARANCE 1/8 IN.

FAN HOUSING PANEL

SCREW (2)

1. Ensure there is not any dust, dirt, etc. that may cause binding on the pivot points of the flapper. If debris is found, use a soft brush, or compressed air, to clean the area as necessary.

2. The arm of the flapper should engage the arm of the airflow switch when the trailing edge of the flapper body is lifted and is at the proper clearance distance off the blower housing bottom. At this distance you will hear a click which are the contacts closing within the switch mechanism.

FLAPPER ADJUSTMENT

4. If the switch is not defective, the flapper arm may need adjustment to engage the switch arm.

5. Using a needle nose pliers, gently bend up the arm of the flapper (NOT TTHE S until the flapper arm engages the switch arm, closing the contacts of the switch.

FIG. 10

3. If the switch contacts do not close within this distance, manually push in the arm in the switch to make sure the switch is not defective. If a click is heard, the switch is generally considered good.

However, to ensure switch contacts do close, perform a continuity test

BLOWER OUTLET

OF HEATER

AIR PROVING

SWITCH

ARM OF

FLAPPER

PIVOT POINT

OF FLAPPER

FLAPPER

FAN WHEEL

PIVOT POINT

OF FLAPPER

EDGE OF

FLAPPER

AIR PROVING

SWITCH ARM

1 - 1 1/4 In.

1. The igniter and sensor assembly is located within a metal enclosure on the heater chamber.

2. Remove the screw that secures the assembly to the heat chamber and disconnect the respective leads from the ignition control. Lift the assembly from its mounting slots. See Fig. 11.

FIG. 11

TO GAP IGNITER, LOOSEN SCREW.

MOVE ENCLOSURE UP OR DOWN

TO ALLOW PROPER POSITIONING

OF IGNITER TO BURNER.

SENSOR

IGNITER

TO REMOVE IGNITER / SENSOR ASSEMBLY

REMOVE SCREW, LIFT ASSEMBLY

FROM ITS MOUNTING SLOTS

3/16 IN.

HEAT CHAMBER FACE

IMPORTANT

IGNITER AND FLAME SENSOR

■ The assembly may require cleaning due to accumulations of dust and dirt over a period of time, thereby affecting its ability to ignite fuel gas and sense burner flame.

-- If spark appears to be weak, briskly rub the igniter electrode with emery cloth or steel wool.

--- If the spark appears strong but the heater cycles off, briskly rub the sensor rod with emery cloth or steel wool.

■ Ensure the igniter gap is 3/16 in. and the igniter tip is positioned over the burner slot according to the illustration below.

ENCLOSURE

BURNER

IGNITER LEAD

SENSOR LEAD

16

17

TESTING THE MANUAL RESET HIGH LIMIT SWITCH

WARNING

5. Allow the switch cool down for about a minute before firmly pressing the reset button on the switch.

■ Do not operate the heater with the high limit switch bypassed.

■ Operating the heater with a bypassed high limit switch may lead to overheating, possibly resulting in a fire, with subsequent damage to the heater, building damage, or loss of plants.

6. Check for electrical continuity across the switch terminals to make sure the contacts have closed.

7. Reinstall the switch back into the heater. Reconnect the heater to its electrical supply. Start the heater and check for proper operation.

The high limit switch should be tested a minimum of once per year when the heater is given a thorough cleaning.

FIG. 13

RESET BUTTON

1. Disconnect the heater from its electrical supply.

2. Remove the high limit switch.

3. Holding the switch by one of its mounting legs, apply a small flame only to the sensing portion on the back of the switch. Be ccareful nnot tto m when cconducting tthis ttest.

4. Within a minute, you should hear a pop coming from the switch, which indicates the contacts of the switch have opened. Check for lack of electrical continuity across the switch terminals to verify contacts have opened.

TERMINAL

MOUNTING

LEG

SENSING

SURFACE

FLAME

Gas Pressure Checks

ATTENTION

■ The following explains a typical procedure to be followed in checking gas pressures.

■ Consult the dataplate on the heater or page 4 in this manual for specific pressures to be used in conjunction with this procedure. The gas pressures will vary depending upon fuel type.

■ Gas pressure measured at the inlet to the gas valve is

Inlet Pressure and gas pressure measured at the outlet of the gas valve is Burner Manifold Pressure.

MATERIALS REQUIRED

(To be secured through local purchase)

Quuaannttiittyy

2 Gas pressure gauges capable of reading up to 35 in. W.C. (may also be ordered from L.B. White, part number 00764)

1 1/2 in. Tee

1

1

Bushing, 1/2 in. x 1/4

Bushing, 1/4 in. x 1/8

A. PPreparation

1. Disconnect the heater from the electrical supply and close the fuel supply valve to the heater inlet.

2. Remove gas hose and sediment trap from heater.

3. Assemble the hardware components together as shown in Fig. 14.

4. Open the case access panel at gas inlet end of heater.

5. Brush or blow off any dust or dirt in the vicinity of the gas control valve.

1. With the heater operating, the pressure gauges should read the pressures specified on the dataplate.

2. Do the readings at the inlet and outlet pressure gauges agree with that specified on the dataplate?

If so, then no further checking or adjustment is required. Proceed to section D.

3. If the inlet pressures do not agree with that specified on the dataplate, then the regulator controlling gas pressure to the heater requires adjustment.

4. If the inlet pressure is correct but the burner manifold pressure does not agree with that specified on the dataplate, then the HI and LO heat output feature of the gas control valve requires adjustment.

5. Turn the thermostat down to its lowest setting.

Remove the cap from the HI and LO heat adjusting screws at the two stage pressure regulator on the gas control valve.

6. Slowly turn up the thermostat until the valve opens in first stage position and a pressure is read of no greater than 1.3 in. W.C. (L.P.) or .8 in. W.C. (N.G.) at the outlet pressure gauge. If less than 1.3 in. W.C.

(L.P.) or .8 in. W.C. (N.G.) is read, the LO heat setting at the regulator on the gas control will require adjusting. Turn clockwise to increase, or counterclockwise to decrease.

7. Turn the thermostat completely up. You should see the valve open at second stage position and the gas pressure increase from 1.3 in. W.C. (L.P.) or .8 in. W.C.

(N.G.) at first stage heat to 5.2 in. W.C. (L.P.) or 3.1 in.

W.C. (N.G.) second stage heat. If less or greater than

5.2 in. W.C. (L.P.) or 3.1 in. W.C. (N.G.), the HI heat setting must be adjusted clockwise or counterclockwise accordingly until proper pressure is achieved.

1. Locate the outlet pressure tap, see Fig. 14. Remove the pressure tap plug using a 3/16 in. allen key.

2. Securely connect a pressure gauge at this pressure tap, and at the tee adapter at heater inlet. See Fig.

14.

3. Open the fuel supply valves to the heater, reconnect the heater electrical supply, and start the heater.

FIG. 14

NIPPLE, 1/2 IN

10

15

20

25

0

35

GAUGE 00764

GAUGE 00764

BUSHING, 1/4 IN X 1/8 IN

BUSHING, 1/2 IN X 1/4 IN

ON

OFF

OUTLET

PRESSURE

TAP

TEE, 1/2 IN

GAS CONTROL HI

LO

1. Once the proper inlet and burner manifold pressures have been confirmed and/or properly set, close the fuel supply valve to the heater and allow the heater to burn off any gas remaining in the gas supply line.

2. Disconnect the heater from its electrical supply.

3. Remove the gauges, gas hose, and tee.

4. Install pressure tap plug.

5. Reconnect sediment trap and gas hoses.

6. Open fuel supply valve. Start the heater and check for gas leaks.

7. Set thermostat to desired temperature.

18

Troubleshooting Instructions

READ THIS ENTIRE SECTION BEFORE BEGINNING

TO TROUBLESHOOT PROBLEMS.

WARNING

■ This heater can start at any time.

■ Troubleshooting this system may require operating the unit with line voltage present and gas on. Use extreme caution when working on the heater.

■ Failure to follow this warning may result in personal injury or death.

The following troubleshooting guide provides systematic procedures for isolating equipment problems. This guide is intended for use by a QUALIFIED GAS HEATER SERVICE

PERSON. DO N

UNLESS YYOU H

NOT AATTEMPT TTO S

Page

L.E.D. is constant on. No flash pattern. . . . . . . . . . . . . . . . . 20

L.E.D. light is not on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

L.E.D. diagnostic light is flashing:

A. One Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

B. Two Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

C. Three Times . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

D. Four Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Mode PProblems Page

A. Motor Does Not Run. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

B. Motor “Hums,” Does Not Run . . . . . . . . . . . . . . . . . . . . . . 24

Components should be replaced only after each step has been completed and replacement is suggested in the flow chart.

Refer to the Servicing sections as necessary to obtain information on disassembly and replacement procedures of the component once the problem is identified by the flow chart.

The following pieces of test equipment will be required to troubleshoot this system with minimal time and effort.

Gauge - for checking inlet and outlet pressures at the gas control valve against dataplate rating.

INITIAL PPREPARATION

■ Visually inspect equipment for apparent damage.

■ Check all wiring for loose connections and worn insulation.

Refer to the system operation sequence in this section to gain an understanding as to how the heater operates during a call for heat.

Understanding the sequence of operation of the ignition module and related components is essential as it relates directly to problem solving provided by the flow charts.

The ignition control module is self-diagnostic. The red light located within the selector switch will flash a specific pattern depending upon the problem which is diagnosed.

To effectively use the flow charts, you must first identify what the problem is by the light pattern of the L.E.D. (light emitting code) diagnostic light. If the light is flashing, the flash pattern will be followed by a pause and then a repeat of the flash pattern until the problem is corrected. Refer to the following tables to identify what page to refer to when troubleshooting any problems.

The light will only be on when the selector switch is positioned to HEAT and the thermostat or controller is calling for heat. The light will not be on when the selector switch is positioned to VENT.

19

-- Selector switch is set to heat.

-- Line voltage is sent to ignition control and to transformer.

-- Red L.E.D. on selector switch is illuminated.

-- Transformer reduces line voltage to 24 volts which is sent to thermostat.

-- The thermostat calls for heat.

-- The thermostat sends 24 volts to ignition control.

-- Ignition control module performs self safety check.

-- Internal components are tested.

-- Air proving circuit is checked.

-- Ignition control module begins ignition trial sequence.

-- Ignition control module sends 24 volts to air proving switch.

-- Ignition control sends 120 volts to motor.

-- Fan motor starts.

-- Air proving switch closes and 24 volts are returned to the ignition control module.

-- Ignition control module sends high voltage to the igniter electrode.

-- Igniter sparks.

-- Ignition control module sends 24 volts to the gas control valve through the high limit switches.

-- Gas control valve opens.

-- Ignition occurs.

-- Igniter continues to spark until flame proving occurs.

-- Ignition spark is cut off.

-- Gas valve stays open.

-- Gas control modulates to first or second stage heating based upon thermostat setting.

-- Room warms to desired temperature.

-- Temperature control is satisfied.

-- Heater shuts down.

-- Process starts again on a call for heat.

-- Trial for ignition takes approximately 10 seconds.

-- If ignition module does not sense a flame within the ignition trial, the module goes into safety lockout (3 flash pattern.)

-- Gas valve closes.

-- Ignition spark shuts off.

-- Fan motor stops.

-- To retry for ignition, the system must be reset:

-- Turn the thermostat down and then up to call for heat or unplug heater and plug it back in or

-- Position selector switch to off and then back to on.

Ignition Module?

20

21

22

23

Check all Electrical Connections. V

the VENT Position.

24

Electrical Connection and Ladder Diagram

L1

NEUTRAL

GROUND

CAUTION-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

BURNER

GROUND

BLACK

WHITE

GREEN

POWER CORD

BLACK

WHITE

GROUND

TRANSFORMER

YELLOW

GREEN

BLACK

BLACK

BLACK

WHITE

HEAT

WHITE

OFF

VENT

WHITE

SELECTOR SWITCH

JUMPER JUMPER

TERMINAL

STRIP

1 2 3 4 5 6

(OPTIONAL)

THERMOSTAT

GROUND

WHITE

BLACK

YELLOW

BLUE

RED

HI LO

RED

GREEN

JUMPER

7 8 9 10

GAS CONTROL

VALVE

HI C

MV

GREEN

BROWN

HIGH LIMIT

SWITCH

BROWN BROWN

IGNITER

FLAME SENSOR

BLUE

BLUE

AIR PROVING

SWITCH

HIGH VOLTAGE

IGNITION LEAD DSI CONTROL

ELECTRICAL CONNECTION DIAGRAM

FAN

MOTOR

DIRECT SENSE

IGNITER

HEAT

OFF

VENT

SELECTOR SWITCH

MOTOR

120V 24V

HIGH

HEAT

LOW

HEAT

THERMOSTAT

GAS VALVE

SOLENOIDS

HIGH LIMIT

SWITCH

AIR PROVING SWITCH

BURNER

GROUND

FS

R

X

C

L1

IND

L.E.D.

MV

PS2

PS1

W

COM

ELECTRICAL LADDER DIAGRAM

BURNER GROUND

IF ANY OF THE ORIGINAL WIRES AS SUPPLIED WITH THE HEATER MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL

HAVING A TEMPERATURE RATING OF AT LEAST 302 F (150 C)

25

Air Proving Switch

Safety device used to insure that the proper air flow is being achieved before the gas valve is opened.

Burner

Cast iron component used to channel gas and provide an area at which the fuel may ignite.

Burner Orifice

Brass metering device used to feed gas to burner at a specific rate.

Direct Spark Ignition Control Module

Electronic printed circuit board which sends and receives voltages to various controls in an automatic ignition system.

An important safety feature of the control board is that it will shut down the entire heater, thereby stopping the flow of fuel gas if burner flame goes out.

Fan Housing

Chamber used for delivering air for efficient air movement.

Fan Wheel

Component used in conjunction with the motor and fan housing to pull the hot air from heater and blow it into room for heating (also known as a squirrel cage).

Gas Control Valve

Electrical device consisting of a low pressure regulator and electrical solenoids used for the control of gas flow to the burner assembly. A feature of the control valve is it’s ability to modulate from a first stage (minimum) heat position to a second stage (maximum) heat position, if needed, to satisfy the temperature requirements of the greenhouse. This results in less temperature variation and potentially lower fuel consumption.

Gas Hose

Flexible connector used to convey gas from supply line in building to heater.

Heat Chamber

Metal fire box within the heater that provides an area where burner flame mixes with combustion air, thereby providing heat.

Heater Component Function

High Limit Switch

Safety device wired into the control system which is used to break an electrical circuit to the gas control valve in event of overheat situation.

Igniter

Ignition device used on automatic direct spark ignition control systems. Ignites gas by spark.

Motor

Electric device used to force preheated air through the heater and to circulate heat within a certain area. Converts electrical energy into mechanical energy.

Regulator

Mechanical device used in L.P. and natural gas distribution systems to reduce a higher inlet pressure to a preset lower pressure. The regulator is responsible to supply a steady outlet pressure to the heater(s) despite changes in inlet pressure, heater demand and weather conditions.

Selector Switch

Electrical device which is used to allow the end user to use the heater in either a heating or ventilation application.

Thermostat

(Optional Accessory)

A two stage electrical device which responds to more closely match a heat to demand requirement. The thermostat incorporates two independent control circuits which interconnect to the heater’s two stage gas control valve, thereby providing low or high heat depending on thermostat setpoint.

Transformer

Electrical control used to accept line power supply primary voltage and reduce it to lower secondary voltage to operate certain control systems.

26

Parts Identification

PARTS LIST

26

27

28

29

22

23

24

25

18

19

20

21

14

15

16

17

30

31

32

33

34

35

36

37

38

39

40

8A

8B

6

7

9

4

5

2

3

10

11

12

13

Item

1

Description

Regulator, LP Gas, 2nd Stage, Vent Over Outlet

Regulator, LP Gas, 2nd Stage, Vent Over Side

Regulator, Natural Gas (5 PSIG Inlet, 13.5 Outlet)

Nipple, 3 1/2 in.

Valve, Manual Shut Off

Hose, 1/2 in. ID x 10 ft. with Adapter

Adapter, Hose, 1/2 NPT x 1/2 NPS

Kit, Sediment Trap

Base

Bracket, Gas Control Valve

Screw, 8-32 x 1/4

Valve, Gas Control: LP Gas

Valve, Gas Control: Natural Gas

Nipple, 1/2 in. x 3 in.

Elbow

Manifold

Orifice, Burner: LP Gas

Orifice, Burner: Natural Gas

Burner

Spacer

Igniter and Sensor Assembly

Switch, High Limit

Chamber, Heat

Case, Assembly with Doors and Latches (2)

Latch Assembly

Harness, Wiring

Control, Ignition

Transformer, 120/24 v.

Cover, Control Box, w/ Hinge & Window Plug

Boot, Selector Switch

Selector Switch

Terminal Strip

Cord, Power, 10 ft.

O-Ring

Plug, Window

Motor, 1/3 HP, Ball Bearing

Mount, Motor

Wheel, Fan

Switch, Air Proving

Flapper

Complete Fan Housing Assembly, w/ Motor, Fan Wheel, Air Proving Switch, Flapper, and Motor Mount

Screw, Burner

Washer

Bolt

Grommet, w/ Hole

(1) Complete control box assembly with all control components is part number 23539.

(2) Specify model number and fuel type when ordering.

(3) Screw part number 07288 (#8 x 3/8) is the standard fastener used for assembly of all sheet metal components.

23530

23531

21724

02687

22473

05566

23566

20465

20959

23534

22461

81218

23550

09916

09915

22905

23574

08347

08255

20169

08647

09050

02680

21035

20148

06553

06665

23360

07148

05548

20714

02894

00815

23523

21768

09425

23835

23836

02972

01426

09291

02688

01589

02692

21851

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Warranty Policy

HEATER

L.B. White Co., Inc. warrants that the component parts of its heater are free from defects in material and workmanship, when properly installed, operated, and maintained in accordance with the Installation and Maintenance

Instructions, safety guides and labels contained with each unit. If, within 1 months ffrom tthe ddate oof ppurchase bby tthe end uuser, 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.

A warranty card on file at L.B. White will automatically qualify a unit and its component parts for warranty consideration. If a warranty card is not on file, a copy of the bill of sale will be required to establish warranty qualification. If neither is available, the warranty period will be 12 months from date of shipment from L B. White.

PARTS

L.B. White Co., Inc. warrants that replacement parts purchased from the company and used on the appropriate

L. B. White equipment are free from defects both in material and workmanship for 12 m months ffrom tthe ddate oof ppurchase by tthe eend uuser. Warranty is automatic if a component is found defective within 12 months of the date code marked on the part. If the defect occurs more than 12 months later than the date code but within 12 months from the date of purchase by the end user, a copy of a bill of sale will be required to establish warranty qualification.

The warranty set forth above is the exclusive warranty provided by L.B. White, and all other warranties, including any implied warranties or merchantability or fitness for a particular purpose, are expressly disclaimed. In the event any implied warranty is not hereby effectively disclaimed due to operation of law, such implied warranty is limited in duration to the duration of the applicable warranty stated above. The remedies set forth above are the sole and exclusive remedies available hereunder. L.B. White will not be liable for any incidental or consequential damages directly or indirectly related to the sale, handling or use of the equipment, and in any event L.B. White's liability in connection with the equipment, including for claims based on negligence or strict liability, is limited to the purchase price.

Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Replacement Parts and Service

Contact your local L.B. White dealer for replacement parts and service or call the L.B. White Co., Inc. at 1-800-345-7200 for assistance. Be sure that you have your heater model number and configuration number when calling.

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