L.B. White AD060, Owner'S Manual And Instructions

Page: 16 / 80

Guardian Brood Heaters
www.lbwhite.com
Owner’s Manual • Guardian
16
Service Instructions
1. Close the fuel supply valve to the brood heater
and disconnect the electrical supply before servic-
ing unless necessary for your service procedure.
2. Open side panels for access to brood heater
components.
3. Disconnect the appropriate electrical leads for the
component being replaced.
4. The thermostat, and high limt switch can be
tested by jumpering the suspect part out of the
electrical circuit:
-- Reconnect the electrical supply and open fuel
supply valves.
-- If the brood heater lights, the component is defec-
tive and must be replaced.
-- Do not operate the brood heater with the compo-
nent jumpered. Replace the part immediately.
-- An alternate method for checking the components
is to perform a continuity check.
5. Do not jumper the air proving switch. If jumpered,
the ignition control will not allow heater operation.
Test the air proving switch for continuity. If defec-
tive, replace the switch
WARNING
Burn Hazard
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time after the brood heater has been shut down.
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service, maintenance, or cleaning.
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causing injury.
WARNING
Fire and Explosion Hazard
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brood heater components or gas train compo-
nents.
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are found.
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explosions, causing property damage, injury, or
death.
6. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
7. After servicing, start the brood heater to ensure
proper operation. Check for gas leaks with ap-
proved leak detectors.
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enlarge the hole, causing combustion or ignition
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cleaned properly.
Fan and Motor Wheel
Assembly
1. Remove the motor mounting plate screws and
lift the fan and motor assembly from the housing.
See Fig. 7, AD250 shown.
2. Loosen the square head set screw(s) on the fan
wheel.
3. Pull the fan wheel from the motor shaft. Use a
wheel puller if necessary.
4. Remove the four (4) nuts securing the motor to
the mounting plate.
FIG. 7
NOTES:
a. Fan wheel to motor mount plate spacing must
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8 before tightening the fan wheel to the motor
shaft.
SCREWS