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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 is approved for indoor use only.

4. The unit’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.

5. Ensure 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.

6. Ensure 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.  

7. 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.

8. Check all connections for gas leaks using approved

gas leak detectors.  Gas leak testing is performed as

follows: 

-- 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.

9. A qualified service agency must check for proper

operating gas pressure upon installation of the heater.

10. Light according to instructions on heater or within

owner's manual.

11. 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.

WARNING

Fire oor eexplosion hhazard.

Can ccause pproperty ddamage, ssevere iinjury oor ddeath.

1. Disconnect power supply before wiring to prevent

electrical shock or equipment damage.

2. To avoid dangerous accumulation of fuel gas, turn

off gas supply at the heater’s service valve before

starting installation, and perform gas leak test after

completion of installation.

3. Do not force the gas control knob.  Use only your

hand to turn the gas control knob.  Never use any

tools.  If the knob will not operate by hand, the

control should be replaced by a qualified service

technician.  Force or attempted repair may result in

fire or explosion.

7

Installation Instructions

GENERAL

WARNING

Fire aand EExplosion H

Hazard

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.

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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