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 TM 55-1925-273-10-1
0067 00
COLD POTABLE WATER SYSTEM
OPERATION:
Cold Potable Water Service
1.
Ensure power is available to #1 and #2 potable water pump motor controllers.
CIRCUIT BREAKER PUMP
PP5-4P-B(1) POT WTR PMP NO. 1
PP5-4P-C(1) POT WTR PMP NO. 2
2.
Ensure sufficient water is available in potable water storage tanks and align potable water system to allow
pumps to take suction from port or stbd potable water tank and discharge to the hydropneumatic tank by
opening valves as follows:
#1 Pump - PW-14 (Port Tank Suction), PW15 (Stbd Tank Suction), PW-16, PW-76, PW-18 and PW-78.
#2 Pump - PW-14 (Port Tank Suction), PW-15 (Stbd Tank Suction), PW-17, PW-77, PW-18 and PW-78.
All other valves in cold potable water system shall be opened as required to serve individual components and
spaces.
3.
Place either #l or #2 pump motor controller in the auto position. In the automatic mode the starting and
stopping of the selected pump is controlled by a pressure switch mounted on the hydropneumatic tank and set
to start pump at 40 PSI and stop at 60 PSI. In the manual mode the start stop control is done manually by
depressing the start/stop push buttons.
CAUTION: Do not leave pumps unattended in the manual mode as pressure switch will not function. Normal
operation is with one pump only in the auto mode.
4.
To secure system place motor controllers in the manual mode and depress stop button.
Placard 21. Cold Potable Water
0067 00-29
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