Sea Recovery Aqua Whisper DX 1400-2, Owner'S Manual

Page: 157 / 226

Aqua Whisper DX Modular 450-1800
Page 9-11
Troubelshooting
Solution : Replace the O-Ring if wear or damage
is present.
Should the End Plug develop a crack, between the
product water port and the pressurized feed water,
similar increase in Product Water flow and high
Product Water salinity will occur.
Solution : Replace the End Plug if it is damaged
or cracked.
At ONE end only of the R.O. membrane element
there is a “U” cup seal referred to as the “brine
seal”. NEVER use two Brine Seals. NEVER place
a Brine Seal on both ends of the R.O. membrane
element. This will cause an air pocket between
the outer surface of the R.O. membrane element
and the inner wall of the Pressure Vessel. The air
pocket would allow the R.O. membrane element
to expand outward during operation causing
irreversible mechanical damage to the R.O.
membrane element resulting in higher than
normal Product Water Flow and High Product
Water Salinity.
Solution : Replace the R.O. membrane element.
NEVER place two Brine Seals on one R.O.
membrane element.
NEVER Block the Product Water Line. NEVER place
a valve in the Product Water Line that can close
and block the Product Water Line. Blockage of the
Product Water line will result in high pressure build
up of 950 PSI (66 BAR) within the line and within
the product water tube and product water channel
of the R.O. membrane element. If the System
is shut down while the Product Water Line is
blocked irreversible damage to the R.O. Membrane
element will occur.
Solution
: Determine what blocked the Product
Water Line and correct the condition. Replace the
R.O. membrane element.
Chemical attack, one that will dissolve the
membrane surface such as an oxidant like
Chlorine, has destroyed the R.O. membrane
element surface.
Solution : Determine the source and
correct the situation. Replace the R.O. membrane
element.
c) Product Water Flow slowly, over months,
decreases and Product Water Salinity, slowly over
months, increases, quality decreases:
repairable. Should a leak, damage, or failure develop
replace the High Pressure Hose.
Solutions
: Replace a damaged High Pressure Hose
22) REVERSE OSMOSIS MEMBRANE AND
VESSEL ASSEMBLY
The Reverse Osmosis Membrane Element allows potable
water molecules to pass through while rejecting the
salt ions. Only a small percentage of the Seawater Feed
becomes fresh Product Water. The remainder carries the
rejected salt ions out of the R.O. membrane element in
a concentrated brine stream. The R.O. System may have
one or two R.O. membrane elements and Vessel in series
depending on the specific model and system capacity.
Problems and Symptoms appearing and caused by the
Reverse Osmosis Membrane and Vessel Assembly:
a)
Prior to assuming that there is a problem
with the R.O. membrane elements due to your
observance that:
The System does not produce the correct amount
of Product Water (too much or too little)
The System produces poor quality Product Water,
high in Salinity
The System Operating Pressure is excessively
higher than 800 PSI (55 BAR) when operating in
normal Sea Water at moderate temperatures (77º
F or 25º Celsius)
The System Operating Pressure is excessively
lower than 800 PSI (55 BAR) when operating in
normal Sea Water at moderate temperatures (77º
F or 25º Celsius)
Go to Section 6 to ensure that the Model Set-Up
has been properly performed.
b) Product Water Flow suddenly and dramatically
increases and Product Water Salinity increases
making the Product Water unpotable:
The Pressurized Feed Water and the unpressurized
Product Water are separated by an O-Ring which
seals on the Product Water Tube at each end of the
R.O. Membrane element and the End Plug at each
end of the Pressure Vessel. Should this O-Ring
fail Feed Water will mix with Product Water. If this
happens the Product Water will be very salty, the
Product Water Flow will increase dramatically, and
the Brine Flow will decrease appropriately (by the
increase in Product Water).