This column cutoff damper is designed to insert through the grain column (from the inside of the dryer) imme- diately above the metering roll. This permits opening of the metering roll access door. For service or inspection without unloading the dryer, the plenum bottom closure panel and metering roll adjust damper must be re- moved prior to using service tool.
TROUBLE ANALYSIS PROCEDURE
A multimeter is required for some of the following checkout procedures. Before performing any tests, check if the dryer power supply is 1 phase, 230 volt, or 3 phase, 230, 380, 460 and 575 volt.
•The burner circuit is 120 volts AC on all standard U. S. production models.
•The control circuit to the motor starters is 120 AC volts.
•The safety circuit is 12 volts DC
•When checking these circuits, measure voltage between the circuit test location and to ground.
•DC circuits should be measured between the test location and its respective DC ground. Refer to wiring diagrams and the parts list for identification of parts and the electrical terminals.
CAUTION: When making high voltage tests with “live” circuits, be extremely careful. Follow established safety practices. Turn power on for testing only. Do not attempt to make the dryer operate by using a jumper wire to bypass a defective safety component.
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