Horizon Reverse Osmosis Seafari Versatile Series, Owner'S Manual

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Seafari Versatile 450 - 1800
Page 7-4
7
The system pressure is below normal. Adjust it
accordingly.
The Feed Water Temperature is above
77° F/25 C
The Feed Water Salinity is above 35,000 ppm
TDS due to operation in a high salinity sea
b) The Brine Discharge Water Flow Meter is
reading lower than normal.
Refer to the Brine Discharge Water Flow Meter
troubleshooting.
A product water “O” ring within the
R.O. Membrane Element Vessel requires
replacement.
The R.O. Membrane Element has developed a
hole or cracked product water tube. (This also
causes higher product water flow, and high
product water salinity.)
7) High Pressure Pump:
The high-pressure pump is a positive displacement
triplex plunger pump. The pump always delivers
the normal amount of water flow unless a problem
develops within the pump, the pump is being
subjected to an extreme vacuum at its inlet, or the
RPM from the Electric Motor has changed due to
low or high Cycles from the Power Source.
High Pressure Pump flow is normal when
the system operating pressure is at zero, but
the flow drops below normal as pressure
is applied: Keep in mind that the Brine
Discharge Flow Meter registers full feed water
flow when there is no pressure applied to
the system and as pressure is applied to the
system the Brine Discharge Flow Meter drops
in relationship to the amount of product water
that is then being produced. Therefore, as
pressure is applied to the system this Brine
Discharge Flow Meter drops in predictable
flow registration by design. That would not
indicate a problem. However, if flow drops
beyond the normal decrease then:
-
Worn High Pressure Pump seals are
allowing internal bypassing and require
replacement.
- Worn High Pressure Pump valves, valve
seats, valve springs and or valve seat “O”
rings are allowing internal by-passing and
require replacement.
- Worn, corroded or eroded manifold is
has not been properly calculated. Refer
to Section 12.
High Pressure Gauge is defective
and registering higher than the actual
applied pressure.
6) Product water quantity and quality:
The R.O. Membrane Element requires a specified
amount of Feed Water flow in order to reject
impurities. Less than required Feed Water flow
causes the R.O. Membrane Element to recover a high
percentage of Product Water (ratio of Feed Water
to Product Water) and causes the R.O. Membrane
Element to foul quickly. It is, therefore, important
to maintain the Feed Water Flow into the R.O.
Membrane Element to prevent mineral build up
fouling. If the High Pressure Pump is damaged, do
not operate the system until the Feed Flow problem
is corrected.
The clarity of the Feed Water affects the R.O.
Membrane Element performance. If the Pre-filtration
Section is not trapping the suspended solids, the
R.O. Membrane Element quickly becomes fouled.
Always ensure that there are clean Pre-filter
Elements and change them frequently.
Always use genuine HRO Pre-filter Elements as
they last longer and are FDA approved. Non HRO
Pre-filter Elements are less efficient causing more
frequent changing. This may lead to neglect and
fouling of the R.O. Membrane Element.
Sea Water (35,000 ppm TDS) applications
operate at 850 PSI to gain optimal performance.
Pressures below 850 PSI cause low Product Water
Production and poor Product Water Quality. The
Operating Pressure is correlated to the Feed Water
Temperature, production rate, and Feed salinity.
When operating from typical 35,000 ppm TDS
Sea Water and a Feed Water Temperature below
77°F / 25 C, the system may be operated at
higher pressures not to exceed 1000 psi, in order
to gain optimal performance. With a Feed Water
Temperature above 77° F / 25 C, the system must
be operated at lower pressures in order to prevent
excessive Product Water recovery and fouling.
There is a decline in Product Water Quality with
Feed Water Temperatures above 77° F / 25 C. This
is natural and expected with the Reverse Osmosis
process, and does not indicate a problem.
a) Water Quality is higher than normal or the red
light does not go out.