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With the fan relay coil energized, the contacts of the fan relay will
close and the +12 VDC will pass (1) through the contacts from #3 to
#1, (2) through the red wire to the circuit breaker, (3) through the
circuit breaker, (4) through the red wire to the motor, (5) through the
motor, (6) through the black wire to the ground system.
Thus, the fan
motor runs.
See Fig. 7
D.
As the fan comes up to speed the air current will close the sail switch
and the +12 VDC will pass (1) through the sail switch, (2) through the
wire to the #1 terminal of the circuit board.
Note:
The
ground
side
of
the
circuit
board
is
established
from
terminal 6 through the red wire to the grounded side of the fan relay.
When the circuit board is energized it will start the 20 second count
down of purge time.
See Fig, 8.
1-14
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