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6. Low Pressure Switch [10]: The Low Pressure Switch contains one N.O. (Normally Open) contact. As the Feed
Water Pump builds pressure on the Pre-filtration Section, the Low Pressure Switch closes at 40 PSI. When
pressure decreases below 40 PSI the Low Pressure Switch opens and shuts the system off. Adjustment of the
Low Pressure Switch is not recommended.
If in field adjustment is absolutely necessary:
1. Stop the Ultra Whisper system.
2. Remove the cap located in the center top of the pressure switch to expose the calibration screw.
3. Adjust the calibration screw, maximum 1/8th turn (45 degrees) at a time, clockwise to increase and
counter clockwise to decrease the set point.
4. Restart the system and check the setting by slowly closing the Inlet Sea cock Valve while observing the
Low Pressure Gauge at the instant the Hi/Low Pressure Lamp at the Touch Pad begins to illuminate
and flash.
5. Repeat as necessary to calibrate the switch.
6. Replace the Switch if calibration is not successful.
7. High Pressure Switch [11]: The High Pressure switch keeps the system in operation when the Feed Pump [6]
outlet pressure is below 190 PSI. If the Feed Pump outlet pressure increases to 190 PSI the High Pressure
Switch shuts the System off. In field, adjustment of the High Pressure Switch is not recommended.
If adjustment is absolutely necessary:
a. Start the System.
b. Remove the sealing cap located on the top of the pressure switch to expose the calibration screw.
c. Using a 3/16" hex wrench, gently adjust the calibration screw, maximum 1/8th turn (45 degrees) at a
time. Turn the screw clockwise to increase the trip point and counter clockwise to decrease the trip
point as appropriate.
d. Once the High Pressure Switch is properly set replace the adjustment screw cover.
8. Plankton Filter [7] Element Cleaning:
1. Unscrew the bowl counter clockwise.
2. Remove the Plankton Filter Element from the bowl.
3. Remove the O-Ring from the top of the bowl and take care to not damage it.
4. Clean the mesh screen filter element with a bristle brush and water spray.
5. Wipe the O-Ring with a damp cloth.
6. Lubricate the O-Ring lightly using a sparingly amount of petroleum free O-Ring lubricant.
7. Place the O-Ring back onto the bowl.
8. Insert the cleaned, or a new, plankton filter element into the bowl.
9. Screw the bowl on clockwise hand snug to seal the O-Ring, do not use a wrench or other tool to tighten, do
not over tighten. Over tightening will damage the threads in the bowl or housing and over tightening will
cause removal to be difficult.
9. Pre-filter [13 & 14] Element Replacement: The Prefilter Pleated Cartridge Element may be cleaned with water
spray once or twice. After cleaning the expected life will be reduced in half. Attempts to clean the element
more than twice will result in a very short life and will result in damage to the element rendering it useless.
Change the element after the first or second cleaning. Clean or replace the element when plugged to the extent
that the System shuts down due to excessive Feed Water Pump Outlet / Prefilter Inlet Pressure [12], greater
than 190 PSI.
CAUTION: Do not use third party prefilter elements, use only Sea Recovery Prefilter Elements. Third party
prefilter elements on the market do not properly fit, the seams fall apart, they will allow by-pass and will allow
the R.O. Membrane Element to foul prematurely. Use of third party prefilter elements will void any and all
Sea Recovery warranty to the High Pressure Pump, the ETD, and the R.O. Membrane Element. Many similar
looking filter elements are of the improper micron rating, incorrect material, do not seal properly, and some do
not have a support tube which will cause the element to collapse.
IMPORTANT: Do not use "string wound" or "fiber" prefilter elements. These type of elements are designed for
the Photographic Film Developing industry. When used in sea water they will plug up rapidly in 1/10th or less
section 7 page 9 of 39
Sea Recovery Ultra Whisper Rev. A
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