TM 55-1930-209-14&P-7
CHAPTER 3 OPERATING INSTRUCTIONS
Section I. Operating controls and indicators
3-1.
Operating controls and indicators
3-1.1
Controls
a.
Power panel 1 circuit breaker 3P5, on ROWPU space port bulkhead, controls power to air compressor's electrical
controller. See TM 55-1930-209-14&P-9 for details on electrical power panels
b.
Air compressor electric controller (Figure 3-1), on ROWPU space port bulkhead above compressor, controls
electrical power to compressor.
c.
Receiver drain cock, on bottom of receiver (Figures 3-2 and 3-3), drains moisture and air from receiver. Turn T-
handle clockwise to open and counterclockwise to close.
d.
Safety valve, on receiver topside forward, automatically maintains pressure in receiver at not more than 155 psi.
e.
Automatic air regulator (pressure switch), on receiver topside, automatically maintains air pressure in receiver
between factory set limits indicated on name/data plates by switching power ON and OFF
f.
Main supply valve, on forward end of receiver, controls air supply to system. Turn handle parallel with pipe to turn
air pressure ON, turn handle to right angle with pipe to turn air pressure OFF.
g.
Air pressure regulator 1 (Figure 3-4), on workshop port bulkhead, controls air pressure for blowdown of forward
seachest in void 2 starboard Regulator Is normally set to 40 psi Turn T-handle on regulator clockwise to decrease
pressure, counterclockwise to increase pressure.
h.
Air station 8 seachest blowdown valve (Figure 1-2), on workshop port bulkhead, contr6ls compressed air for
blowdown of forward seachest. Valve is used with SW30.
i.
Seawater system valve SW30, on workshop port bulkhead, controls air vent for forward seawater seachest. Its
normal position is open to vent air from seachest to atmosphere through venting pipe to deckhouse top. When
closed, and air station 8 seawater seachest blowdown valve is open, air pressure Is forced into seachest to blow
out debris.
j.
Air pressure regulator 2 (Figure 3-4), on ROWPU space aft bulkhead near port bulkhead, controls air pressure
used in blowdown of generator cooling water seachest. Regulator is normally set to 40 psi and works the same
as air pressure regulator 1.
k.
Air station 9 generator cooling seachest blowdown valve, on ROWPU space aft bulkhead, controls compressed
air for blowdown of generator cooling seachest In void 4 port. Valve is used with SW44.
l.
Seawater valve SW44, on ROWPU space aft bulkhead, controls air vent for generator cooling water seachest. It
works with generator cooling water seachest blowdown valve in similar manner as forward seachest blowdown
valve and SW30.
3-1.2
Indicators
a.
Air compressor electric controller, on ROWPU space port bulkhead near compressor, indicates status of
compressor as either START, STOP, AUTOMATIC, or MANUAL (Figure 3-1).
b.
Receiver pressure gauge, located on top side forward of air receiver, indicates amount of pressure in air receiver.
c.
Oil sight glass on compressor indicates oil level in compressor.
d.
Air regulator pressure gauge 1, on workshop port bulkhead, indicates air pressure as regulated by pressure
regulator 1. Normal reading should be 40 psi for air station 8 forward seachest blowdown.
e.
Air regulator pressure gauge 2, on ROWPU space aft bulkhead near port bulkhead, indicates air pressure as
regulated by pressure regulator 2. Normal reading should be 40 psi for air station 9 generator cooling water
seachest blowdown.
3-1
