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-- 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.  

FIG. 1 

(Typical installation allowing two directions of air movement.)

(Optional accessory on some models.)

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

AIR DIVERTER 

INSTALLATION INSTRUCTIONS

Alternate Air Diverter Installations

TABS

DIVERTER 
HALVES

OUTLET
SCREWS

FORMED 
OUTLET GUARD

NOTCHES IN MOUNTING TABS

8

Summary of Contents for FUEL HD120

Page 1: ...idence in our products and welcome any suggestions or comments you may have call us toll free at 1 800 345 7200 Owner s Manual and Instructions GreenGro Plus Greenhouse Heaters ATTENTION ALL USERS Thi...

Page 2: ......

Page 3: ...nal injury or loss of life 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 o...

Page 4: ...nce 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 an...

Page 5: ...et and exhaust outlet do not open when heating is required HD120 Propane Natural Gas Gas M Mo od de el l Indoor Mounting Air Exchange Requirements 1 Burner Manifold Pressure In W C Net Weight lbs Ship...

Page 6: ...ans leading to serious injury or death Symptoms of carbon monoxide poisoning can include headaches dizziness and difficulty in breathing Asphyxiation H Hazard Some p people c cannot s smell w well S S...

Page 7: ...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 n...

Page 8: ...mber 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...

Page 9: ...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...

Page 10: ...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...

Page 11: ...THERMOSTAT GROUND BROWN RED RED YELLOW YELLOW WHITE BLACK WHITE BLACK GREEN 8 9 10 HI LO YELLOW BLUE RED NIPPLE HOSE ADAPTER TEE NIPPLE CAP TO GAS CONTROL...

Page 12: ...ctrical connection jumper between relays in building control to allow staging transition of gas control valve D Heat V Vent B Building C Control C Connections Using N Non P Powered C Contacts Remove j...

Page 13: ...er 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 con...

Page 14: ...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...

Page 15: ...Periodic cleaning and inspection as well as proper maintenance are essential to avoid serious injury or property damage 1 The area surrounding the heater shall be kept clear and free from combustible...

Page 16: ...on FIG 9 AIR PROVING SWITCH Service Instructions 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 ope...

Page 17: ...R AND FLAME SENSOR BLOWER OUTLET OF HEATER AIR PROVING SWITCH ARM OF FLAPPER AIR PROVING SWITCH ARM FANWHEEL PIVOT POINT OF FLAPPER EDGE OF FLAPPER PIVOT POINT OF FLAPPER FLAPPER 31 7 MMTO 34 9 MM 1 E...

Page 18: ...om 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 5 Allow the switch cool down for...

Page 19: ...let 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 o...

Page 20: ...s 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...

Page 21: ...Are 24 Volts Supplied from Transformer No No No No No Yes Is Proper Voltage Supplied to Transformer No Yes Yes No See One Time Flash L E D Light is Defective Replace Ignition Control Check Dataplate...

Page 22: ...ns Yes Repair Air Proving Switch One T T ime Flash P P attern Begins Immediately After C C ondition Occurs Is Air Proving Switch Stuck Closed Check Continuity Is Airflow Switch Binding Repair Yes Yes...

Page 23: ...Proving Switch No Is Fan Loose On Motor Shaft Yes Tighten Fan Blade Set Screw Is Proper Voltage Supplied to Fan Motor No Yes Defective Motor or Capacitor Replace Motor or Capacitor Is Ignition Module...

Page 24: ...curs T T he Module H H as Gone i i nto S S afety Lockout Is Proper Fuel Supplied to Heater Inlet Connect Proper Fuel Supply to Heater Open All Gas Shutoff Valves Yes No Is Proper Gas Pressure Supplied...

Page 25: ...onnections Verify Proper Voltage with a Voltage Tester Contact a Qualified electrician if Proper voltage is not Present No No Yes Is Proper Voltage Supplied to Selector Switch from Power Cord No VENTI...

Page 26: ...TER MALFUNCTION CHECK FOR PROPER OPERATION AFTER SERVICING WARNING THIS HEATER MAY START AT ANY TIME FAN MOTOR TRANSFORMER AIR PROVING SWITCH BLUE BLUE HIGH VOLTAGE IGNITION LEAD IGNITER FLAME SENSOR...

Page 27: ...lexible 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 pro...

Page 28: ......

Page 29: ...Switch High Limit 05566 18 Chamber Heat 23566 19 Case Assembly with Doors and Latches 2 20465 20 Latch Assembly 20959 21 Harness Wiring 23534 22 Control Ignition 22461 23 Transformer 120 24 v 81218 2...

Page 30: ...date o of p purchase by t the e end u user 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 t...

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