SK EZ-500 User manual

SK Watermakers
11250 Old St Augustine Rd #15-267
Jacksonville, FL 32258 USA
941-257-2036
EZ-500
USERS MANUAL
WARNINGS
1. SK Watermakers recommends installation and service to be completed by qualified marine
technicians.
2. Desalination systems operate at high pressure. Serious injury may occur. Immediately shut
down system if any leaks occur during operation.
3. Do not allow the pumps to run dry.
4. Turbid water and oily water will shorten the life of the system. Operate in clean water where
possible and keep pre-filter cartridge clean.
PACKING LIST
Included with system:
-12V Feed Pump (or optional 115V or 230V feed pump if specified)
-Pre-filter housing with 5 micron cartridge
-High Pressure Pump
-6’ High Pressure Hose
-6’ - 3/8” poly tubing
-Membrane Assembly
Not included with system:
-Thru-hull/Seacock
-Strainer
-Electrical wiring
-3/4” braided hose
-Fasteners
-5 gallon bucket

INSTALLATION INSTRUCTIONS
FEED PUMP
Locate the feed pump at least 18 inches (0.5 meter) below the waterline to ensure adequate seawater
supply during operation. Locate the pump lower if pitch and roll of the boat are excessive.
Locate in an area where you can easily switch the feed valve on the inlet side of the feed pump. You
will need to be able to switch from raw seawater (thru-hull) to cleaning water.
Securely fasten the feed pump to a solid surface.
PRE-FILTER HOUSING
Locate the pre-filter housing in an area where 1) the clear filter sump can be visually observed, and 2)
the filter cartridge can be easily replaced.
Securely fasten the pre-filter housing to a solid surface.
HIGH PRESSURE PUMP
Locate the high pressure pump within 6 feet (1.8 meters) of the membrane assembly. A 6 foot (1.8
meter) pressure hose is supplied with the unit –contact SK Watermakers if a different length hose is
needed.
Securely fasten the high pressure pump to a level solid surface using the anti-vibration mounts
supplied. Locate the oil change tube for ease of access when performing oil changes.
The high pressure pump is shipped with a non-vented cap to prevent oil leakage. Replace this cap (red
cap on top on high pressure pump) with the orange vented cap. DO NOT OPERATE THE SYSTEM
WITHOUT THE VENTED CAP IN PLACE.
MEMBRANE ASSEMBLY
The membrane assembly may be mounted vertically or horizontally, but the horizontal orientation is
preferred for ease of use, viewing the pressure gauge and operating the valves.
Locate in an area within 6 feet (1.8 meters) of the high pressure pump. A 6 foot (1.8 meter) pressure
hose is supplied with the unit –contact SK Watermakers if a different length hose is needed.
Securely fasten the membrane assembly to a solid surface using the mounting holes in the brackets.
THE HIGH PRESSURE GAUGE MUST BE INSTALLED BEFORE USE (if not installed at the factory). Remove
the ¼” nylon plug from the stainless steel TEE on the membrane assembly and discard it. Apply Teflon
tape to the brass threads of the pressure gauge and install it into the TEE. Use a 9/16” wrench on the
brass hex portion of the gauge to tighten. DO NOT TIGHTEN BY TURNING THE GAUGE BODY.

CONNECTIONS
(refer to schematic below for flow diagram and connections)
NOTES:
1. High pressure hose
a. 6 feet (1.8 meter) supplied with system
b. Contact SK Watermakers for different length high pressure hose
2. 3/8” blue plastic tubing
a. Permeate line from membrane assembly to permeate valve supplied with system
b. Contact SK Watermakers for additional hose, specify length
c. Required for:
i. Permeate valve to tank
ii. Permeate valve to bucket
d. You may substitute 3/8” braided hose, contact SK Watermakers for details
3. 3/4” braided hose
a. None supplied with system
b. Contact SK Watermakers for hose (specify length) and hose clamps
4. 5 gallon bucket –not supplied with system
5. Electrical wire –not included with system

OPERATING INSTRUCTIONS
Before starting the unit, be sure of the following:
1. Feed valve on the inlet side of the feed pump is turned to the raw water/thru-hull position.
2. Permeate valve on the membrane assembly is turned to the sample/cleaning position and the
sample/cleaning hose is securely positioned in a 5 gallon bucket.
3. Be sure the concentrate valve on the membrane assembly is in the fully open position.
4. Visually inspect the pre-filter housing for signs of excessive contamination on the filter
cartridge. Replacement may be necessary if too dirty.
Starting the unit:
1. Turn on the feed pump. Be sure it is moving sufficient water to the high pressure pump.
2. Turn on the high pressure pump. The high pressure pump should never run dry. Be sure
sufficient water is flowing to and through the high pressure pump.
3. Slowly close the concentrate valve and watch the pressure rise on the pressure gauge. Continue
to close the valve until it reaches 800 psi. NEVER EXCEED 800 PSI.
4. Permeate water should be flowing into the bucket. Fill the bucket to roughly 3-4 gallons.
Reserve this water for flushing when operation is complete.
5. When bucket has sufficient water, turn the permeate valve to the tank position. Water should
now be flowing into the storage tank.
6. Continue operation until sufficient water has been made into the storage tank.
Shut down procedure:
1. Completely open the concentrate valve. Pressure should drop from 800 psi and the unit will
stop producing permeate water.
2. Turn the permeate valve to sample/cleaning.
3. Turn the feed valve on the feed pump from the raw water/thru-hull position to draw the
reserved water from the bucket.
4. Within 60-90 seconds the reserved water should have been flushed through the unit and to the
overboard drain.
5. Turn off the high pressure pump BEFORE the bucket is completely empty.
6. Turn off the feed pump.
7. Operation complete.

MAINTENANCE
Oil Change
1. The WM Series high pressure pump requires an initial oil change after the first 50 hours of use,
and then every 500 hours after.
2. With the system shut down, provide a container to drain the oil into (approximately one pint).
3. Locate the oil drain tube extending from under the high pressure pump.
4. Remove the plug and let the oil drain into the catchment container.
5. Reinstall the plug
6. Fill with approximately one pint of genuine General Pump pump oil, p/n 100214 –available
online at skwatermakers.net.
7. View oil level through the window on the end of the high pressure pump.
8. Inspect for leaks when finished.
Filter change
1. The filter cartridge will need to be replaced periodically. Visually inspect the cartridge through
the clear filter housing before each use.
2. With the system shut down, press the pressure relief valve on top of the filter housing to
relieve any pressure in the system. Some water may spray from the valve.
3. Using the filter wrench, loosen the clear sump from the housing.
4. Remove the sump, and remove the cartridge from inside.
5. Replace the cartridge with a 5 micron pleated cartridge, 2-3/4” x 9-3/4” – available online at
skwatermakers.net.
6. Reinstall the sump and cartridge, be sure the cartridge is seated properly in the sump and the
upper receptacle inside the housing head.
7. On next system operation, be sure the clear sump completely fills with water –no air bubbles
or obstructions. Also inspect for leaks.
Cleaning/Pickling
1. Turn the feed pump valve to the bucket. Be sure the hose is secure within the bucket.
2. Turn the permeate valve to sample/cleaning. Be sure the hose is secure within the bucket.
3. Remove the filter cartridge per the instructions in the Filter Change section above.
4. Fill the bucket with about 4 gallons of clean water.
5. If Cleaning:
a. Add the contents of the CH-751 Acid Membrane Cleaner to the water and mix well.
b. Turn on the feed pump. The cleaning solution will circulate through the membrane
assembly and return to the bucket. Continue this for 30 minutes and shut off the feed
pump. It is not necessary to run the high pressure pump during this operation.
c. Discard the cleaning solution and refill the bucket with about 4 gallons of clean water.
d. Add the contents of the CH-752 Alkaline Membrane Cleaner to the water and mix well.
e. Repeat step 5a.
f. Repeat step 5b.

g. Turn on the feed pump to flush the system with clean water for 15 minutes. Turn off the
feed pump.
h. Discard the flush water.
i. Reinstall the filter cartridge per the instructions in the Filter Change section above.
6. If Pickling:
a. Perform steps 1, 2, 3, and 4 above.
b. Add contents of the CH-750 Sodium Metabisulfate to the water and mix well.
c. Turn on the feed pump. The pickling solution will circulate through the membrane
assembly and return to the bucket. Continue this for 5 minutes and shut off the feed
pump. It is not necessary to run the high pressure pump during this operation.
d. Discard the pickling solution. Do not flush the pickling solution from the system.
e. Reinstall the filter cartridge per the instructions in the Filter Change section above.
f. When operating system the first time after pickling, discard permeate water for 15
minutes before switching to storage tank to flush out the pickling solution.
7. Cleaners and Preservative are available online at skwatermakers.net
WARRANTY
1. SK Watermakers warrants machine workmanship and parts for one year from the original date
of shipment, with the exclusion of the membranes –there is no warranty on membranes.
2. All systems are pressure tested under simulated seawater conditions at the factory before
shipping and test results will be provided if requested.
3. All shipments must be inspected within 7 days of receipt and SK Watermakers needs to be
notified as soon as possible of any shipping issues.
4. All shipments are FOB North Port, Florida, USA, and it is Customers responsibility to file any
claims with freight companies. SK Watermakers will assist in such claims to the best of our
ability.
5. Any warranty claim for workmanship or parts must be approved in advance by SK Watermakers
before any disposition is determined.
6. Customer is responsible to return any part that may be eligible for warranty reimbursement or
replacement.
7. All replacement product is invoiced and payment collected at time of shipment.
8. Upon receipt and inspection of returned item(s), Customers account will be credited if item is
deemed defective.
9. There are no other expressed or implied warranties.
10. SK Watermakers does not pay for repair services without authorization. In cases where
Customer is authorized to provide labor to diagnose, repair and/or replace defective
components on SK Watermakers behalf, prior authorization to perform such work is required.