L.B. White AW250, Owner'S Manual And Instructions

Page 1: ...ner s Manual and Instructions Agricultural Animal Confinement Building Heaters ATTENTION ALL USERS This heater has been designed tested and evaluated by L B White Co Inc as a direct gas fired circulat...

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Page 3: ...ury 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...

Page 4: ...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...

Page 5: ...Manifold Pressure mbar Net Weight kg Shipping Weight kg Electrical Supply Volts Hz Phase Amp Draw Starting Amps Includes Igniter Dimensions cm L x W x H Minimum Safe Distances From Nearest Combustible...

Page 6: ...d difficulty in breathing Symptoms of improper combustion affecting livestock can be disease lower feed conversion or death Asphyxiation Hazard Some people cannot smell well Some people cannot smell t...

Page 7: ...atures are fully functioning 6 Do not operate the heater with its door s open 7 Do not locate fuel gas containers or fuel supply hoses within 6 10 meters of the blower outlet of the heater 8 Do not bl...

Page 8: ...s 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 g...

Page 9: ...your gas supplier or the L B White Co Inc if you have any questions 14 This heater is configured for use with either L P vapor withdrawal only Do not use the heater in an L P gas liquid withdrawal sys...

Page 10: ...ated in the specification section of this owner s manual and on the heater dataplate FIG 3 Assemble the tee nipples and cap together and tighten securely The sediment trap assembly must always be moun...

Page 11: ...trol Box on the Heater a The installation and wiring of a thermostat must be done by an electrician or someone properly qualified b The thermostat may use 18 gauge 2 wire cord to handle the low voltag...

Page 12: ...e in troubleshooting Only qualified and properly trained personnel shall service or repair the heater 7 On a call for heat the motor will start up and run for five 5 seconds and then stop This pre pur...

Page 13: ...may be washed only on the external case assembly provided A The heater is disconnected from the electrical supply B All access panels are securely closed C Water spray nozzle shall not discharge withi...

Page 14: ...will enlarge the hole causing combustion or ignition problems Replace the orifice if it cannot be cleaned properly 3 The high limit switch HEAT VENT switch and thermostat can be tested by disconnectin...

Page 15: ...bend up the arm of the sail NOT THE SWITCH ARM in increments until the sail arm engages the switch arm closing the contacts of the switch when the sail body trailing edge is 31 7 mm to 34 9 mm from th...

Page 16: ...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...

Page 17: ...end of the igniter leads See Fig 12 3 Remove the screw securing the igniter shield and the igniter to the mounting bracket Remove the igniter and shield 4 Connect the male plug on the replacement ign...

Page 18: ...Allow the switch cool down for about a minute before firmly pressing the red reset button on the switch 5 Check for electrical continuity across the switch terminals to make sure the contacts have cl...

Page 19: ...iagnostic light flashing A Rapid Flash 20 B Long Flash 2 seconds on 2 seconds off 20 C One Time 20 D Two Times 21 E Three Times 22 F Four Times 23 G Five Times 23 H Six Times 23 Ventilation Mode Probl...

Page 20: ...ly Requirements Provide Proper Voltage From Electrical Supply Check Circuit Breakers in Building Electrical System Check Power Cord for Continuity Replace Thermostat Replace Selector Switch Are 24 Vol...

Page 21: ...Rapid Flash Reverse Polarity Have Electrician Check Neutral and Hot Wire Connections that Outlet Heater is Connected to Long Flash Two Seconds On Two Seconds Off Repetitively for 15 Minutes Heater ha...

Page 22: ...or Check for Housing Alignment Tighten Set Screw s on Fan Make sure Set Screw s are Tightened Against Flat s of Motor Shaft Yes Clean the Fan Wheel with Compressed Air or Soft Brush Defective Motor or...

Page 23: ...is read adjust outlet pressure as necessary B If gas pressure is not read replace the control valve Defective Igniter Perform Continuity Check and Replace Igniter If Necessary Clean Flame Sensor with...

Page 24: ...board sends and receives voltages throughout the entire operation sequence The HSI board terminals should also be checked for delivering proper voltages in addition to the individual components as ind...

Page 25: ...ons 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 Problem Moto...

Page 26: ...25 Electrical Connection and Ladder Diagram...

Page 27: ...oard which sends and receives voltages to various controls in an automatic hot surface ignition system An important safety feature of the control board is that it will shu down the entire heater there...

Page 28: ...Parts Identification PARTS SCHEMATIC 27...

Page 29: ...igh Limit 05566 22 Chamber Heat 20024 23 Door Right 20757 24 Latch Assembly for case assembly and control box 20959 25 Case Assembly with Doors and Latches 20144 26 Hinge 05868 27 Door Left 20756 28 H...

Page 30: ...ate of purchase 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 dat...