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 TM 55-1905-220-14-2
2-92. DRAINING BILGE WITH FIRE PUMP AND EDUCTOR (Cont).
( b ) Press the START switch on the fire pump controller. The fire pump will run.
(c) When the fire pump is at operating speed, rotate suction valve (14, FO-48) counter-clockwise.
(d) The fire pump is pumping water through the eductor and out the overboard discharge valve.
(e) Rotate valve (15, FO-48) counter-clockwise.
(f) Eductor suction vacuum gauge (16, FO-48) should read approximately 28 Hg (inches of water).
CAUTION
To prevent backflooding - DO NOT open flow control valve (13, FO-48) until vacuum
gauge (16, FO-48) indicates a vacuum in eductor suction valve.
(g
Place flow control valve (13, FO-48) lever in the on position.
(h) Rotate valve (17, FO-48) counter-clockwise.
(i)
Eductor supply gauge (18, FO-48) should read 90 psi (620.5 kPa).
2-546
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