Table 4-2. Unit Troubleshooting Guide (Continued)
TEST OR INSPECTION
SEPARATORS. (MODEL WTA-060 ONLY)
Separator leaks at inlet or outlet flange.
Check flanges for tightness. Tighten flange capscrews evenly and in small increments until leak stops.
If the inlet flange continues to leak, replace separator (para. 4-20).
If the outlet flange continues to leak, remove the flange and replace the vortex finder gaskets (para.
Inspect vortex finders for damage and replace as necessary.
If the leak is coming from the capscrew(s), remove capscrew and put pipe thread sealant on the
threads (para. 4-20).
Separator leaks at piping joints.
Repair leaks (para. 4-19).
Water leaks through separator waste hoses when ROWPU is shut down.
Replace separator outlet check valve (para. 4-19).
Separator leaks at body flange joints.
Check for hardware tightness.
Tighten as necessary, if leaks continue, notify direct support maintenance.
No wastewater flow from separator hoses.
Step 1. Check raw water pump rotation. It should be clockwise from the fan end.
If rotation Is wrong, rewire motor by interchanging the T1 and T2 leads in the motor junction box(para. 4-
Step 2. Test raw water pump. Start the pump and let it run until water is flowing out of the ROWPU waste
Close the cartridge filter block valve and read the pressure on the media filter pressure gage.
If the pressure is less than 35 psig (276 kPa), replace the raw water pump and motor assembly (para.
If the pump is working properly, remove the bottom of the separator (para. 4-20) and clean out any
sand or debris that may be clogging the separator.
No raw water discharge flow from separators.
If operating in freezing conditions, be sure separators are not filled with frozen water. Warm up the
separators before assuming they are plugged.
Remove the separator discharge piping (para. 4-19) and start the raw water pump (para. 2-17).
If there Is no flow from the separator outlet, replace the separator (para. 4-20).
If there Is flow through the separator, replace the separator outlet check valve (para. 4-19).
4-16 Change 7