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TM 3-4230-209-20&P
1-18
heaters in series and the voltage finally goes to ground. During the 0-2 second
(8) With S4 to HEATER ON, voltage is removed from terminal 1, as
time span only the fan motor (MOTB1) will be operating. Relay K1 will have
shown before. and switched to terminal 3 and 5. This voltage is connected to
reopened the fuel and ignition drive motor (MOTB2) should stop.
TD1 and TD2 (thermal delay relays) through pins 2 and 3 on each, placing the

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