On discharge pump motor controller of pump selected in step f (1), close main switch (Figure 14-5) to ON. Then
position HAND/OFF/AUTO switch to AUTO.
Tank(s) are manually drained when motor controller HAND/OFF/AUTO switch is on
HAND. Discharge pump Is started or stopped by pushing START or STOP button
on motor controller or pushing START or STOP button on ROWPU space remote
START/STOP switch (Figure 14-5) on ROWPU space forward bulkhead.
As tank(s) Is/are being filled and drinking water is being discharged to shore, EMS
continuously monitors water level in tanks, discharge flow rate, water discharge
pressure, and salinity.
As drinking water is being discharged to shore, periodically check the following:
On EMS video monitor, check following indications:
POTABLE WATER TANKS
Level in each tank Total level in all four tanks.
Chlorine content between 2 and 5 ppm.
Salinity of drinking water being discharged not greater
than 1500 ppm.
Water pressure for shore discharge flow is not greater
than 140 psi, flow rate is 250 gpm (15,000 gph) and total
amount discharged is being indicated.
If EMS indications are not within these tolerances, take corrective action. Periodically, manually check
chlorine content and salinity according to TM 55-6630-215-12. Obtain sample at storage tank sample
valve. If readings do not agree with EMS reading, take corrective action.
On tank liquid level indicator, compare level in each tank to EMS reading. If not in agreement, take
On flow meter in void 3 port, check flow rate and total water discharged and compare to EMS reading. If
not in agreement, take corrective action.
The water level in each tank is monitored by a liquid level sensor. When water
rises or falls above or below the level that starts or stops the discharge pump, EMS
visual alarms flash and audible alarms sound. Alarms are also activated when
discharge pressure or salinity falls outside acceptable values. EMS video monitor
automatically changes to ALARM page which displays problem condition In
flashing double Intensity. In addition, POTABLE WATER TANKS key flashes red
and sounds an alarm. These alarms warn crew that appropriate corrective action
must be taken.
If alarms are activated, perform procedures 1, 2, 3, 4, or 5 as appropriate.
If alarms are activated by tank high liquid level switch due to a full tanks), while shore discharge pumps are
operating normally, perform the following:
Stop discharge pump by moving HAND/OFF/AUTO switch on motor controller to OFF.
Press red flashing POTABLE WATER TANKS key on EMS keyboard to change EMS video monitor
ALARM display page back to POTABLE WATER TANKS display page.