ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0070 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
DIRECT SUPPORT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
Install a new RO feed tank as follows:
1.
Install a secure the new RO feed tank to the TWPS frame as follows (see Figure 8):
a. Install the two heaters in the new tank. Refer to WP 0052.
b. Install the RO Feed Pump Inlet Strainer S-4 in the new tank. Refer to WP 0052.
WARNING
The RO feed tank is heavy. Use an appropriate lifting device to lift and remove the
RO feed tank. Failure to observe this warning may result in back injury.
c.
Lift and move the RO feed tank into the right end of the frame, taking care that the drain
fittings and outlet tube at the bottom of the RO feed tank clear the TWPS frame.
d. Secure the tab at the temperature gauge end of the tank to the TWPS frame using the
flat washer, lock washer, and bolt removed earlier.
e. Secure the tank heater end of the tank to the TWPS frame using the retaining strap, 2 flat
washers, 2 lock washers, and 2 bolts removed earlier.
2.
Clean the external threads on all threaded components that were removed from the old RO feed
tank.
3.
Install RO Feed Tank Main Drain Valve V-412 and the pipe run from the RO feed tank to the
waste out pipe as follows (see Figure 7):
a. Apply antiseizing tape to the external threads of the pipe nipple on the elbow that was
removed from the drain of the old tank. Thread the pipe assembly into the drain of the
new tank. Make sure the pipe assembly is positioned as shown in Figure 7.
b. Apply soapy water to the straight pipe on the RO feed tank drain and the end of the pipe
section containing RO Feed Tank Drain Valve V-412.
c. Slide the hose clamps and hose over the two pipe ends. Do not tighten the hose clamps
yet.
d. Apply antiseizing tape to the external threads of the pipe section containing RO Feed
Tank Drain Valve V-412. Thread the pipe onto the pipe elbow at the waste out pipe.
e. Position the hose and hose clamps, then tighten the hose clamps.
4.
Connect the power cables to both RO feed tank heaters H-1 and H-2 as follows (see Figure 6):
a. Make sure the packing/retainer is over the threads of the 45 degree box connector.
b. Insert the 45-degree box connector, with the conduit attached, through the hole in the
bottom of the terminal box.
c. Thread the lock nut onto the box connector inside the terminal box and tighten to secure
the connector to the box.
d. Connect the heater cable wires to the heater terminals in accordance with the wire tags.
e. Secure the heater cap onto the heater using the four screws..
5.
Install the lower MF backwash pipe section at the right end of the tank as follows (see Figure 5):
a. Position the left elbow pipe and short pipe section assembly.
b. Secure the right end of the short pipe to the right elbow pipe using the sanitary clamp.
c. Install Shell Backwash Lower Outlet Valve and Actuator V-402.
d. Connect the air tubing to the actuator for Valve V-402 in accordance to the tags.
6.
Install the upper MF backwash pipe section at the right end of the tank as follows (see Figure 4):
a. Position the upper MF backwash pipe section as shown in Figure 4.
b. While one person supports the upper MF backwash pipe section, secure the pipe section
into place as follows:
0070 00-10
