Sediment Strainer Assembly.

TM 55-1905-223-24-7

c. Sediment Strainer Assembly. The sediment strainer assembly (3, FIGURE 1-4, Sheet 1) is a transparent (Lexan)

cylindrical vessel mounted in the right end of the watermaker. Feedwater entering the unit is drawn by suction of the low

pressure pump assembly through an inlet fitting on the strainer bottom, then flows through the 80-per-inch openings of the

nylon basket to the outlet on one side. A full diameter threaded cover provides quick access to the reusable basket. Hand

pressure on the cover fins makes or breaks the watertight seal. The transparent body and cover let you see trash deposits

in the basket.

d. Air/Oil Separator Assembly. The air/oil separator (4, FIGURE 1-4, Sheet 1) is a cylindrical vessel mounted

vertically in the right front of the watermaker. Feedwater enters a fitting at the top of the unit and exits at the bottom.

Internal orifices create a vortex, causing the lower density oil and air to separate by centrifugal force and escape into the

bleed outlet in the cover. Four mounting screws hang the unit beneath the horizontal mounting bracket.

e. Magnetic Starter Assembly. The magnetic starter assembly (5, FIGURE 1-4, Sheet 1) is the electrical enclosure

mounted to the upper crossmember of the watermaker frame facing the high pressure pump motor. A power cable

interconnects the two. The enclosure provides input and output cable openings and cable terminals, contractors, heater

packs for overload protection, and manual and automatic reset adjustments.

f. Low Pressure Pump Assembly. The low pressure pump assembly (6, FIGURE 1-4, Sheet 2) is a centrifugal pump

mounted near the center of the watermaker under the magnetic starter. The impeller housing bolts to one end of a

protective enclosure which joins the pump to a 1/10-horsepower electric motor. This fixture encloses the magnetic

coupling components. The motor shaft turns a cylindrical drive magnet which surrounds a tubular extension of the impeller

chamber. Inside this chamber on a stationary shaft is a plastic encased impeller magnet which turns the impeller blade.

The design circumvents shaft penetration of the impeller chamber. The pump provides boost pressure for the micron

filters and draws the feedwater into the system.

g. Micron Filter Assembly. The micron filter assembly (7, FIGURE 1-4, Sheet 2) consists of two 5-micron filters that

occupy most of the space in the right half of the watermaker. Each filter includes an upright drum called a pressure vessel

that is joined to a molded plastic base. The pressure vessel houses the washable filter cartridge. The base incorporates

inlet and outlet piping connections. A circular band with a threaded end clamp secures the stainless steel tank wall to the

base. An identical upper clamp secures the cover to the tank wall. In the center of the cover is a threaded plug. On one

side of the cover is the outlet fitting for the bleed-off hose.

h. Solenoid Valve Assembly. The solenoid diversion valve (8, FIGURE 1-4, Sheet 2) is bracket mounted to the back

of the water monitor. It has one inlet port and two outlet ports. The valve interconnects the product water inlet with one or

the other outlet by action of the solenoid. With no voltage applied, product water is piped into the brine manifold. With

voltage applied, the valve diverts the outflow into the ship's fresh water storage tanks. The operating voltage to the

solenoid is 220 volts out of the water monitor.

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