L.B. White GUARDIAN AB250 Owner'S Manual And Instructions Download Page 14

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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.

Electrical Connection and Ladder Diagram

ELECTRICAL LADDER DIAGRAM

ELECTRICAL CONNECTION DIAGRAM

WARNING: THIS HEATER MAY START AT ANY TIME

HIGH LIMIT

SWITCH

SOLENOID

AIR PROVING SWITCH

MOTOR

GROUND

THERMOSTAT

NEUTRAL

GROUND

MOTOR

HIGH LIMIT

SWITCH

GAS

CONTROL

VALVE

WHITE

BLACK

GREEN

BLA

BLACK OR RED

BLACK

OR RED

AIR PROVING SWITCH

(NOT SUPPLIED ON SOME MODELS)

POWER

CORD

THERMOSTAT

(OPTIONAL)

JUMPER
(REMOVE TO ADD
THERMOSTAT)

NOTE: IF AIR PROVING SWITCH IS NOT SUPPLIED, POWER IS SENT

DIRECTLY TO HIGH LIMIT SWITCH. SEE "DASHED" LINE.

IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE

REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A

TEMPERATURE RATING OF AT LEAST 302

F (150

C).

Summary of Contents for GUARDIAN AB250

Page 1: ...ultural Animal Confinement Building Heater Certification by ATTENTION ALL USERS This heater has been tested and evaluated by C S A International in accordance with ANSI IAS U S LC2 1996 as well as the Canadian Gas Association Standard for Gas Fired Brooders CAN1 2 20 M85 and is listed and approved as a direct gas fired circulating heater for the heating of agricultural animal confinement buildings...

Page 2: ...vents 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 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 e...

Page 3: ...e at no charge to qualified personnel by contacting the local L 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 application The L B White Co Inc has a policy of continuous product improvement It reserves the right to change specifications and design...

Page 4: ... P Natural Gas Gas M Mo od de el l Ventilation Air Required to Support Combustion Burner Manifold Pressure Net Weight lbs Shipping Weight lbs Electrical Supply Volts Hz Phase Amp Draw Starting Amps Includes Igniter Dimensions Inches L x W x H Minimum Safe Distances From Nearest Combustible Materials STARTING CONTINUOUS OPERATION Motor Characteristics Fuel Consumption Per Hour Inlet Gas Supply Pres...

Page 5: ...trained service people must repair the leak check for further leakages and then relight 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 ventilation air must be provided to support the combustion air requirements of the heater being used Refer to the speci...

Page 6: ... 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 t...

Page 7: ...iness 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 c...

Page 8: ...al 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 16 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 i...

Page 9: ...sure heater is securely fastened and is hanging level Check crosswise and lengthwise 3 See Fig 3 for typical indoor installation In any animal confinement building consideration must be given to making sure the heater is located away from the livestock so that livestock cannot knock the heater tear it loose from its mounting or damage the heater or its gas supply line in any way Make sure you obse...

Page 10: ...ter must be tested for proper operation after the thermostat has been connected WARNING Electrical S Shock H Hazard Disconnect the electrical supply before connecting the thermostat to the heater Failure to follow this warning can result in electrical shock leading to personal injury or death 10 THERMOSTAT INSTALLATION MANUAL SHUT OFF VALVE HOSE AND REGULATOR ASSEMBLY REGULATOR NIPPLE VALVE MANUAL...

Page 11: ... supply valves and check for gas leaks using approved certified leak detectors 2 The gas control valve incorporates a manual gas shut off feature Position the indicator on the shut off knob to pilot 3 Fully depress the red pilot button located on the control valve while applying flame to the pilot light 4 Keep the button depressed for about 30 seconds to allow the thermocouple to warm up so the pi...

Page 12: ...minimum heat or maximum heat When the throttle valve handle is parallel to the gas flow the valve is completely open to deliver maximum heat output Refer to Fig 7 The throttle valve may be adjusted to minimum heat output by turning the handle 90 to gas flow or any position between maximum and minimum settings Refer to Fig 8 Variable Heat Output THROTTLE VALVE GAS MANIFOLD GAS CONTROL VALVE MAXIMUM...

Page 13: ... venturi ports and the throat of the casting are free of dust accumulation and the area between the heat chamber top and inside case is also free 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 WARNING This heater may be washed only on the external case assembly provided A The heater is disconnected ...

Page 14: ...WITCH MOTOR GROUND THERMOSTAT NEUTRAL GROUND MOTOR HIGH LIMIT SWITCH GAS CONTROL VALVE WHITE WHITE WHITE BLACK BLACK BLACK BLACK BLACK GREEN BLACK BLACK BLACK OR RED BLACK OR RED AIR PROVING SWITCH NOT SUPPLIED ON SOME MODELS POWER CORD THERMOSTAT OPTIONAL JUMPER REMOVETO ADD THERMOSTAT NOTE IF AIR PROVING SWITCH IS NOT SUPPLIED POWER IS SENT DIRECTLYTO HIGH LIMIT SWITCH SEE DASHED LINE IF ANY OFT...

Page 15: ...the main burner and heating the thermocouple Pilot Safety Control Valve A gas control valve which is held open by electrical power supplied by a pilot generator and which closes automatically to shut off the flow of gas to the main burner when the pilot flame is extinguished or becomes too small to light the main burner Pilot Shield A formed sheet metal piece that fits around the pilot assembly to...

Page 16: ...16 24 35 34 22 36 37 33 32 30 27 23 26 25 41 44 29 28 31 42 43 38 14 17 40 39 18 15 10 5 4 13 11 12 3 6 9 20 19 2 8 7 21 1 33 16 Parts Schematic Parts Identification ...

Page 17: ... Orifice Pilot LP Gas 07829 Orifice Pilot Natural Gas 06968 20 Cover Bottom 20265 21 Screw Wing 07484 22 Stud 07827 23 Pilot Bracket 07831 24 Shield with Pilot Stack 20264 25 Terminal Strip 08253 26 Enclosure Electrical 20028 27 Cover Enclosure 20027 28 Screw 02688 29 Burner 03453 30 Spacer 02687 31 Switch High Limit 05566 32 Chamber Heat 20024 33 Door Either End 20757 34 Cord Power 20426 35 Latch...

Page 18: ...t the d 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 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 t...

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