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41
The Feed Pump and Clark Pump
The feed pump and the Clark Pump require no routine maintenance except inspection for
leaks. Tighten any hose clamps or fittings that show signs of leakage. The high pressure fittings
threaded into the Clark Pump have O
-
ring seals with a straight thread. These should never leak
and should never be over
-
tightened. If one of the tube nuts starts to leak, it can be un
-
threaded, sealed with a bit of silicone grease or oil, and tightened with two wrenches very
tightly.
The Membrane
Membranes are susceptible to mineral scaling, biofouling and oxidation damage. The leading
cause of fouling is biological growth that forms when the system is left unused without
flushing or pickling. Fouling from mineral scaling can happen under certain seawater
conditions, or from rust. Oxidation damage can occur if the membrane comes into contact
with any strong oxidant, such as Ozone, Chlorine, etc. Monitor the product salinity and feed
pressure for higher than normal readings, take environmental conditions into consideration.
Note:
•
Cold feed water or a higher salinity seawater source can cause high pressure.
•
Low product flow is usually due to low voltage, a worn feed pump, or worn Clark Pump.
Due to the unique design of your Spectra system, low product water volume is typically not a
membrane problem, but frequently related to low voltage, a worn feed pump head, or a worn
Clark Pump. Always perform a flow test before cleaning your membrane.
Test to see if biological growth has occurred:
Before running the system, remove the pre
-
filters and examine their condition. If the filter housings are full of smelly, discolored water,
the system was not properly stored. Install clean pre
-
filters.
Next check the membrane. Detach the brine discharge hose, attach the brine service hose, and
lead it to a bucket. Open the pressure relief valve 1/2 turn, and manually run the system for 30
seconds (metal toggle switch on feed pump module). Examine the brine water: If it is
discolored and smells bad, perform an SC
-
2 cleaning with unchlorinated water before running
the system pressurized. If the brine is fairly clean, follow the New System Startup procedure
on page 24 and run normally. Check for performance. Clean the membranes
only if
performance is reduced.
See the
Cleaning Procedure
for complete instructions.
Maintenance Cont
’
d
Содержание Spectra Catalina 340C
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