Rainman Electric Manual
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Page 15
For freeze protection to -15°C (+5°F), use a solution of 30% PG / 70% fresh water.
For freeze protection to -40°C (-40°F), use a solution of 50% PG / 50% fresh water.
Note: if your system has already been pickled with SMBS, flush this out with 10 litres (2.5 gallons) of fresh
water before pickling with PG. Mixing SMBS and PG can damage your system.
1.
To pickle your watermaker with potable antifreeze, fill a bucket with 10 litres (2.5 gallons) of PG/fresh
water solution. With the unit switched off, place the intake hose in the open container of potable
antifreeze solution.
2.
Start the unit with the pressure control valve wide open. When the bucket is almost empty, switch off
your watermaker, leaving the pickling fluid in the system. Do not allow the pickling solution bucket to
run completely dry while the PSU is running.
Your unit is now protected from freezing and from biological growth for up to twelve months.
Changing the pre-filter
Pre-filters should be changed when they become visibly fouled.
1.
To change the pre-filter, place the Pressure Supply Unit (PSU) on the
deck of your vessel. Use the supplied filter wrench to remove the
clear filter housing.
2.
Replace the cartridge.
3.
Fill the housing with water before screwing it back on. This will aid
the priming of the pump.
Note: the correct type of cartridge is a ‘sediment’ or ‘particle’ type cartridge with a 5 micron
rating. Do not use a carbon cartridge. Some carbon cartridges also function as sediment
filters, and therefore may be labelled as ‘sediment’ cartridges and hav
e a 5 micron rating.
These are NOT suitable for use with your Rainman watermaker as they will restrict flow rates
and cause problems with your high pressure pump.
High pressure pump maintenance
We recommend you change the pump’s crankcase oil annually. It
is important to check the oil level from time
to time, particularly if you have had oil leak or spill from the pump at any time.
The correct oil to use is SAE 30 oil. Any grade that ends in 30 is suitable i.e. 5W-30, 10W-30 and 15W-30 are
all suitable. These are the most common grades of automotive engine oil. The equivalent ISO oil grade is
ISO100.
1.
Crankcase oil can be drained by removing the stainless hexagonal
plug on the underside of the high-pressure pump.
