OP-4 FRESH WATER FLUSH

The purpose of the fresh water flush is to replace the sea water in the watermaker with fresh water whenever the system is not operating. The “Auto Flush Mode” on the MPC 3000 changes the fresh water every five days if the system has been idle that long. The watermaker will last longer and operate better if it is always kept filled with fresh water between uses.

Most spectra watermakers are equipped with a fresh water flush module. This module in- cludes a 50 micron filter to filter out abrasive particles in the feed water that might damage the feed pump, a charcoal filter to remove any chlorine in the fresh water that might damage the membrane, an electrically operated valve and a check, or “one way”, valve. The electrically operated solenoid valve opens during the fresh water flush allowing the boats pressurized wa- ter system to supply water to the system. The check valve prevents the fresh water from going out backwards through the sea strainer and sea cock. The charcoal filter has a maximum flow rate of 1.5 gallons per minute (6lpm) so the feed pump is operated at a reduced speed on some models, or is cycled on and off on other models, to avoid exceeding this flow rate.

If the ship’s water system is unable to provide flush water at the required flow rate, sea water will be drawn in to make up the difference. This will cause the flush water to be brackish, and ineffective in preserving the watermaker. At initial startup the fresh water flush system should be tested by taking a sample of the brine discharge water just as the flush cycle is ending. This water should not taste salty, and should read less than 1000 ppm on a digital tds meter. The flush cycle can also be tested by closing the sea cock during the flush cycle. If the MPC- 5000 display gives a CK SEA STRAINER alarm this means that the fresh water supply is in- sufficient.

Because the pre-filters trap the plankton in the feed water they can be subject to “going an- aerobic” or starting to smell like rotten eggs, as the trapped plankton decay. For this reason it is advisable to always put in clean elements if the unit is going to be left on Auto Flush Mode. In daily or regular use the fresh water flush after each shutdown will help prevent this prob- lem, but in excessively warm or fertile waters the pre-filters will need regular attention.

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Spectra Watermakers MPC-5000 owner manual OP-4 Fresh Water Flush
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MPC-5000 specifications

The Spectra Watermakers MPC-5000 is a highly efficient water desalination system designed for a variety of applications, including marine, off-grid, and emergency situations. Known for its reliability and innovative technology, the MPC-5000 stands out as one of the leading solutions for producing fresh water from saltwater.

One of the main features of the MPC-5000 is its impressive production capacity. Capable of producing up to 5,000 gallons of fresh water per day, this system is well-suited for larger vessels or facilities with significant water needs. This robust output makes it an ideal choice for yachts, research vessels, and even small communities in remote areas.

The MPC-5000 utilizes advanced reverse osmosis technology, a process that efficiently separates salt and impurities from seawater. This technique not only ensures high-quality drinking water but also operates at lower energy consumption compared to traditional desalination methods. By employing a state-of-the-art energy recovery device, the MPC-5000 maximizes energy efficiency, significantly reducing operational costs and environmental impact.

In terms of build quality, the MPC-5000 is constructed with marine-grade materials to withstand harsh conditions, making it durable and reliable for long-term use. Its compact design allows easy installation on various platforms, and the system can be operated either through AC or DC power sources, providing flexibility for diverse applications.

The onboard controls of the MPC-5000 are user-friendly, featuring a digital display that provides real-time data on system performance, water production rates, and maintenance alerts. This intuitive interface simplifies operation and monitoring, ensuring users can quickly identify and address any issues.

Another noteworthy characteristic is its low maintenance requirement. The MPC-5000 is designed for easy serviceability, allowing users to conduct routine maintenance with minimal downtime. The integrated filtration system and user-replaceable membrane further enhance its appeal, offering convenience without sacrificing performance.

In conclusion, the Spectra Watermakers MPC-5000 is a standout solution in the water desalination market. With its impressive production capacity, advanced technology, durable construction, and user-friendly design, it meets the water needs of various users while ensuring efficient and reliable operation. Whether for marine use, emergencies, or off-grid living, the MPC-5000 represents a smart investment in sustainable water sourcing.
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