TM 55-1925-282-14&P
0024 00
7. Adjust the low pressure cutoff to a lower setting as follows:
NOTE
Access to the low pressure cutoff switch adjustment screw is gained from the top of the
flow control panel. It is not necessary to open the flow control panel to gain access to
the adjustment screw.
a. Rotate the low pressure cutoff switch adjustment screw (figure 6, item 5) a maximum of 1/8th of a turn
counterclockwise.
b. Fully OPEN the applicable inlet sea water supply valve as shown in table 1.
c.
Press the FAULT RESET switch (figure 1, item 3).
d. Press the START switch (figure 1, item 4).
e. Slowly throttle the applicable inlet sea water supply valve (table 1) in the CLOSED position until the HIGH
PRESSURE PUMP INLET pressure gauge (figure 4, item 10) indicates between 15 PSI (1.0 bar) and 16
PSI (1.1 bar).
f.
Repeat steps 7a - 7e until the ROWPU shuts down automatically when the applicable HIGH PRESSURE
PUMP INLET pressure gauge (figure 4, item 10) indicates between 15 PSI (1.0 bar) and 16 PSI (1.1 bar).
8. At the applicable system controller, press the STOP switch (figure 1, item 2).
9. Perform the Follow-On Service procedure at the end of this work package.
REPLACE LOW PRESSURE CUTOFF SWITCH
REMOVAL
1. Shut down the applicable ROWPU (WP 0005 00).
2. At 440V power panel No. 5, set to OFF, lock out, and tag out (FM 55-502) the applicable circuit breaker as
shown in table 1.
3. At the 24 Vdc control panel, set to OFF, lock out, and tag out (FM 55-502) the applicable circuit breaker as
shown in table 1.
4. CLOSE, lock out, and tag out (FM 55-502) the applicable sea water supply valve as shown in table 1.
NOTE
Access to the low pressure cutoff switch is gained from the rear of the flow control panel.
It is not necessary to open the flow control panel to replace the switch.
5. Remove the screw (figure 6, item 6) that secures the wire plug (figure 6, item 7) to the low pressure cutoff
switch (figure 6, item 8).
6. Pull the wire plug (figure 6, item 7) straight off the low pressure cutoff switch (figure 6, item 8).
7. Unscrew the low pressure cutoff switch (figure 6, item 8), and remove it from the HIGH PRESSURE PUMP
INLET pressure gauge (figure 4, item 10).
0024 00-13
