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MODELS

OUTPUT 

(Btuh)

FUEL

AD250

250,000

150-27993

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 1-800-345-7200.

Owner's Manual and Instructions

GUARDIAN 

®

Agricultural Animal Confinement Building Heaters 

with 

Smart Sense

™ 

Automatic Variable Rate Heat

For Use with SmartBox

Controller

ATTENTION ALL USERS

This heater has been designed, tested and evaluated by L.B. White Co. Inc. as a

direct gas-fired circulating heater for the heating of agricultural animal confinement

buildings, and is approved for either indoor or outdoor mounting.  To utilize the Smart

Sense

automatic variable rate gas control valve, the heater must be connected to

an L.B.White SmartBox

and building environment controller.  If you are considering

using this product for any application other than it’s intended use,  please contact

your fuel gas supplier, or the L.B. White Co., Inc.

Patent Pending

Propane-Vapor

Withdrawal or

Natural Gas 

Summary of Contents for GUARDIAN Smart Sense AD250

Page 1: ...ding Heaters with Smart Sense Automatic Variable Rate Heat For Use with SmartBox Controller ATTENTION ALL USERS This heater has been designed tested and evaluated by L B White Co Inc as a direct gas f...

Page 2: ...line 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...

Page 3: ...B White distributor dealer or the L B White Company 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...

Page 4: ...ed to Support Combustion CFM Burner Manifold Pressure in W C Net Weight lbs Shipping Weight lbs Electrical Supply Volts Hz Phase Amp Draw Starting Amps Includes Igniter Dimensions Inches L x W x H Min...

Page 5: ...environment controller is required for further operation See Fig 1 for a typical system diagram Each SmartBox controls two zones of heat two heaters er zone One sensor may be used for each zone of he...

Page 6: ...ht the appliance for you WARNING Do not use this heater for heating human living quarters Do not use in unventilated areas The flow of combustion and ventilation air must not be obstructed Proper vent...

Page 7: ...ving 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 d...

Page 8: ...eep foreign materials from entering the gas valve and protect the safe functioning of that important safety component 10 Any heater connected to a piping system must have an accessible approved manual...

Page 9: ...fects 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 b...

Page 10: ...TIONS SEDIMENT TRAP ASSEMBLY NIPPLE HOSE ADAPTER TEE NIPPLE CAP TO GAS CONTROL VALVE INLET EYEBOLT NUT FLATWASHER CAGE NUT CHAIN CASETOP NOTE REGULATORS SHOULD ALWAYS BE MOUNTED OUTDOORS IF CIRCUMSTAN...

Page 11: ...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 reg...

Page 12: ...1 and 2 FIG 7 B Wiring from SmartBox to the heater s Smart Sense variable rate gas control valve a Connect Smart Sense gas control valve wiring for Zones 1 and 2 at SmartBox leads as shown in Fig 8 F...

Page 13: ...onnel shall service or repair the heater 5 On a call for heat the motor will start up and run for five 5 seconds This pre purge is a safety feature and a normal operational characteristic prior to ign...

Page 14: ...ee of dust c When washing with water observe and obey the Warning within these Cleaning Instructions This same Warning is also supplied on the heater 14 Cleaning Instructions Maintenance Instructions...

Page 15: ...and must be replaced Do not operate the heater with the switch jumpered Replace the part immediately An alternate method for checking the components is to perform a continuity check 5 Do not jumper t...

Page 16: ...off briskly rub the sensor rod with emery cloth or steel wool to remove any build up Restart the heater Ensure the igniter gap is 1 8 3 16 in and the igniter tip is positioned over the burner port ac...

Page 17: ...bout a minute before firmly pressing the reset button on the switch 6 Check for electrical continuity across the switch terminals to make sure the contacts have closed 7 Reinstall the switch back into...

Page 18: ...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 press...

Page 19: ...s is essential as it will relate directly to problem solving provided by the flow charts The ignition control module is self diagnostic The red light on the module will flash a specific pattern depend...

Page 20: ...control terminal PS2 Ignition control powers the igniter and igniter sparks Ignition control sends 24 volts from terminal MV to gas control through high limit switch Ignition occurs Igniter continues...

Page 21: ...ive Replace ignition module Is proper voltage supplied to transformer Check electrical connections and power supply to transformer Repair as necessary No Yes 21 Heater does not cycle above minimum hea...

Page 22: ...seconds off repetitively for 15 minutes Heater has attempted three ignition trials Heater is in a 15 minute wait period before attempting three more trials for ignition If ignition is not achieved aft...

Page 23: ...efective motor or capacitor Replace motor Yes Remove obstruction Clean as necessary No Is fan wheel plugged with dirt No Is there an obstruction in blower outlet preventing air proving switch closure...

Page 24: ...o heater and check with a gauge No Remove orifice and burner casting Blow out with compressed air or clean with a soft brush No No No No No Is flame sensor insulator cracked No Is flame sensor properl...

Page 25: ...blems in three time flash pattern 1 The ignition control sends and receives voltages throughout the entire operation sequence The ignition control s terminals should also be checked for delivering pro...

Page 26: ...ROUND POWER CORD WHITE FAN MOTOR GAS CONTROLVALVE L1 IND L E D MV PS2 PS1 W FS R X C COM GREEN YELLOW BLACK DSI CONTROL TRANSFORMER IGNITER FLAME SENSOR HIGH LIMIT SWITCH AIR PROVING SWITCH BLACK BLAC...

Page 27: ...ical circuit to the gas control valve in event of overheat situation Ignition Control Module Controls the ignition sequence and operation of the heater as well as monitoring the safety sevices A major...

Page 28: ...28 Parts Identification PARTS SCHEMATIC 29 27 14 15 16 17 19 18 20 21 22 23 24 25 26 13 12 11 10 9 8 28 7 6 5 4 3 2 1...

Page 29: ...Orifice burner Propane Gas 570053 Natural Gas 572876 10 Burner 570655 11 Burner mounting hardware 570211 12 Igniter and sensor assembly 22473 13 High limit switch 505566 14 Heat chamber 570200 15 Case...

Page 30: ...urchase by the end 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 than the date code b...

Page 31: ......

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