TM 10-4320-317-13
Table 3-1. Troubleshooting Procedures-(Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
NO DISCHARGE OF WATER AT MANUAL DISBURSING STATION - Cont
Step 4. Check nozzles and elbow valve assemblies for damage or defective parts.
If damaged or defective parts are found, notify unit maintenance.
Step 5. Check hypochlorination unit adjustment range to ensure that flow is at 14 GPM.
If 14 GPM flow rate cannot be obtained, notify unit maintenance.
3.
NO DISCHARGE OF WATER AT PRESSURE-REDUCING VALVE.
Step 1. Check that isolation cock valves are open.
a.
If not, fully open isolation cock valves.
b.
If no discharge of water, go to step 2.
Step 2. Ensure pressure-reducing valve is correctly installed.
If water still does not flow and pressure-reducing valve is correctly installed, notify unit maintenance.
4.
PRESSURE-RELIEF VALVE ACTIVATES.
Step 1. Check for obstructions and closed butterfly valves downline.
a.
Check obstructions.
b.
Open butterfly valves.
Step 2. Check for proper installation of pressure-reducing valve.
Reposition pressure-reducing valve is required.
Step 3. Check for malfunctioning pressure-reducing valve.
a.
Check that isolation check valves are open.
b.
If still malfunctioning, notify unit maintenance.
Step 4. Refer to technical manual for 600 GPM pumping assemblies and ensure 600 GPM pumping assemblies
are operating properly.
If 600 GPM pumping assemblies are not operating properly, refer to proper technical manual and
troubleshoot 600 GPM pumping assemblies.
Step 5. Install new pressure-relief valve.
3-3
