Parker AQUA DUO A455C-2800, Technical Manual

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5.3 Startup Procedure
1.
Open the Sea Cock Valve fully.
2.
Switch the electrical power to the system on at the circuit breaker. The “POWER” lamp
on the system Touch Pad will illuminate.
3.
Ensure that the back-pressure regulator valve is fully open (counterclockwise). This is
not required and is commonly skipped on systems equipped with a Remote Control.
Performing this step reduces wear and tear on the mechanical and electrical
components.
4.
Press the “Start” switch. This initiates the automatic start sequence. The automatic start
sequence begins with the booster pump starting immediately and the high-pressure
pump following after a brief delay.
or
Press the “Booster Pump” switch then press “Start” switch. Pressing the booster pump
switch starts just the booster pump. It continues running by itself until the start switch
is pressed.
5.4 High/Low Pressure Fault Lamp Explanation
Low Pressure fault: When the inlet pressure to the high-pressure pump falls below 6 psi, the
“High/Low Pressure” lamp blinks. If the condition is not corrected, the system shuts down after
20 seconds. The Low-Pressure switch monitors this condition caused by a dirty pre-filter, a
closed Inlet Sea Cock Valve, or restriction at the Inlet Thru-Hull fitting or in the inlet feed line.
High Pressure fault: The High-Pressure switch stops the system if pressure exceeds 950 psi.
1.
After the cause of the fault condition has been corrected, press “Fault Reset” and
repeat the steps in Startup Procedure (Section 5.3).
2.
Slowly adjust the backpressure regulator until the system produces the specified product
water gallon per hour flow at the Product Flow meter (DO NOT exceed 950 psi).
See “Temperature Effects” and “Salinity Effects” in Chapter 3 for expected pressure settings
and production.
Colder Water: At sea water temperatures below 77°F, the Aqua DUO RO Desalination
System must operate at a higher pressure to produce the specified amount of fresh
water. As water temperature drops, the individual H2O molecules are less active and
higher pressure is required to drive them through the membrane surface. Another result
of lower temperature feed water is that the fresh water produced has a lower salt content.
Do not operate with feed water below 33°F / 1°C because the product water will freeze
and cause mechanical failure and rupture of components within the system.
Warmer Water: At water temperatures above 77°F, the Aqua DUO RO Desalination
System operates at a lower pressure to produce the specified amount of fresh water. As
water temperature rises, the individual H2O molecules are more active and pass through
the RO Membrane Element with less pressure. Higher temperatures also allow more
salt to make its way into the fresh water. Do not operate with feed water that exceeds