Parker AQUA DUO - A455C, Technical Manual

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7.2 Product Water Flow and Product Water Quality
“ The system is operating at 850 psi and is not producing specified product water flow .”
1.
Feed Water salinity is greater than 35,000 PPM: Higher salinity Feed Water Requires
higher pressure to make rated flow. Refer to Salinity Effects in Chapter 3 to identify
expected pressure for Higher salinity feed waters. Do not exceed 950 psi operating
pressure.
2.
System Feed Water temperature is lower than 77ºF / 25ºC: Lower temperature feed
water requires higher operating pressure to make rated flow. Refer to Temperature
Effects chart in this manual to identify expected pressure for lower temperature Feed
Waters. Do not exceed 950 psi operating pressure.
3.
NEW System Initial Commissioning: The RO Membrane Element may have dried out
between the time of installation and the time of commissioning. Contact the factory if
this time period is uncertain. If this may be the situation, then operate system pressurized
for 48 hours continuous to saturate and hydrate the RO Membrane Element. Only do this
if it is known that the system was shipped months prior to installation and commissioning
was performed months after installation, or if it is known that the RO Membrane
Element has dried out.
4.
RO Membrane Element has been in use for a period of time and is fouled from use: If
RO Membrane Element has been stored improperly without proper flushing and/or
storage solution or if it has simply slowly degraded over time and use, then the
membrane may be fouled and cleaning may restore performance. If not, membrane
should be replaced.
5.
Membrane has chemical fouling: If RO Membrane Element has been performing
normally and the drop in production was sudden over one or two times of use it may be
chemically fouled by petroleum or other pollutants.
6.
Membrane has dried out: If it is known that the RO Membrane Element has dried out
operate system pressurized for 48 hours continuous to saturate and hydrate the RO
Membrane Element.
7.
RO Membrane Element has been exposed to temperatures in excess of 140°F / 60°C:
Replace RO Membrane Element.
8.
There may be a restriction in the product water line : Ensure that any valve in the
product water line is fully open. Note: It is preferred and recommended that there are
no valves in the Product Water Line. Ensure that any valve in the product water line is
tight, a loose or easily turning valve handle will move and reposition itself due to the
movement and pounding of the boat.
System produces more than rated product water flow when operating from full seawater salinity
of 35,000 ppm or higher and the operating pressure is 400 PSI or lower and the Product Water
Quality Lamp is illuminated
“red.”
1. A mechanical failure exists in the RO Membrane Element and/or High-Pressure Vessel.
2. Cracked or broken RO Membrane Element product water tube which is caused by a