ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0055 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR SYSTEM, REDUCED PRESSURE
ENTIRE AIR SYSTEM BLEED DOWN PROCEDURES
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
performing maintenance on the TWPS Air System. Failure to observe this warning
can result in injury to personnel and damage to equipment.
High pressure. The air system contains air pressure up to 1800 psig. The air
system must be bled prior to performing maintenance on components of the air
system. Failure to observe this warning can result in injury to personnel and
damage to equipment.
Bleed the entire air system as follows:
1. Make sure TWPS is in Standby Shutdown without Draining Down (WP 0017).
2. Bleed the entire air system as follows (see Figure 1 for valve location):
a. Stop the air compressor by switching the Air Compressor control at the OCP to OFF.
b. Close Air Receiver Tank Shut-Off Valve V-907.
c. Make sure that Low Pressure Air Shut Off Valve V-909 is open.
d. Slowly open Low Pressure Air Vent Valve V-910 to bleed the air from the air system.
e. Slowly open High Pressure Air Vent Valve V-904.
LOW PRESSURE AIR
SHUT-OFF VALVE V-909
LOW PRESSURE AIR
VENT VALVE V-910
AIR RECEIVER TANK
SHUT-OFF VALVE V-907
HIGH PRESSURE AIR
VENT VALVE V-904
Figure 1. Valves for Bleeding the Entire Air System.
055 00-2
