TM 10-7310-281-13&PMODERN BURNER UNIT (MBU)0003 00THEORY OF OPERATION0003 00-2CCElectrical Short. An internal circuit breaker is located in the controller (2). The nominal rating of thebreaker is 15 amps dependant on ambient temperature. Once the breaker has tripped; it can be reset byturning the power off and eliminating the cause of the short circuit. It will then reset itself in 30 - 60seconds dependant on ambient temperature. As breakers are typically thermal devices, the point atwhich they open and close is dependent on the temperature of the internal components. The breaker isconnected in series with the POWER Button.Normal Shutdown. The MBU is shut down by pressing the STOP button.Figure 1-3. MBU Operational Schematic1428209322237251926171824821155141361011293027122
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