ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
2. Install an RO feed tank heater as follows:
a. Apply sealing compound to the heater threads.
b. Insert the new heater element into the tank and thread it all the way into the tank heater
coupling.
c. Make sure the packing/retainer is over the threads of the 45 degree box connector.
d. Insert the 45-degree box connector, with the conduit attached, through the hole in the
bottom of the terminal box.
e. Thread the lock nut onto the box connector inside the terminal box and tighten to secure
the connector to the box.
f. Connect the heater cable wires to the heater terminals in accordance with the wire tags.
g. Secure the heater cap onto the heater using the four screws.
RO Feed Pump P-4 Pump/Motor Assembly Replacement:
Parts (TM 10-4610-309-24P):
RO Feed Pump P-4 pump/motor assembly
Gasket, inlet flange
Gasket, outlet flange
Materials:
Clean, dry rags
Equipment Condition:
TWPS in Standby Shutdown With Drain-Down
Army: Generator off and TWPS main breaker off
Marine Corps: TWPS disconnected from power source
Replace RO Feed Pump P-4 Pump/Motor Assembly as follows:
WARNING
The TWPS must be in Shutdown and the TQG and TWPS main breaker must be off
(Army) or the TWPS disconnected from its power source (Marine Corps) prior to
removing or installing the RO feed pump. Failure to observe this warning can
result in injury or death from electrocution or damage to equipment.
1.
Remove the RO Feed Pump P-4 Assembly from the TWPS skid as follows (see Figure 3):
a. Make sure the TWPS is in Standby Shutdown With Drain-Down.
b. Remove the terminal box cover from the pump motor (2 cap screws).
c. Tag and disconnect the pump power cable wires and the motor wires (7 wires).
d. Remove the power cable lock nut from the box connector.
e. Pull the box connector and power cable as an assembly out of the terminal box.
f. Open RO Feed Pump Drain Valve V-211. Once drained, remove the P-4 drain tubing.
g. Remove the four cap screws, eight flat washers, and four lock nuts that connect the
pump inlet flange to the RO feed tank discharge pipe flange. Push the pipe back and
remove the gasket. Inspect the gasket and replace if necessary.
h. Remove the four cap screws, eight flat washers, and four lock nuts that connect the
pump outlet flange to the RO feed pump discharge pipe flange.
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