Spectra Watermakers Bimini 300, Installation And Operating Manual

Page: 49 / 78

49
Winterizing with Propylene Glycol
See description of propylene glycol formulations, and purging from system, on pages 52 - 53.
1. Close the intake seacock.
2. Push the Fresh Water Flush button to fresh water flush the system. Perform a second fresh
water flush in the same way.
3. Remove the hose from the “ To Strainer ” pigtail, install the inlet service hose from the service
kit, and lead the hose to the bottom of a bucket. Connect the brine service hose, and run it into a
second container.
4. Pour 1 gallon (4 liters) of propylene glycol of appropriate concentration (see pages 42 - 43) into
the bucket with the intake service hose.
5. Make sure the pressure relief valve on the Clark Pump is
OPEN 1/2 turn (un - pressurized).
6. Run the feed pump by switching the manual switch on the
control box to ‘ SERVICE ’ until about a gallon of water has
flowed from the brine discharge service hose, or antifreeze
appears. Propylene glycol will look slightly different, and
feel more slippery, than water. Stop the pump by moving the
switch back to ‘ RUN AUTO ’. Add more propylene glycol to
the intake bucket if necessary.
7. Lead the brine discharge service hose into the intake bucket
of propylene glycol. Move the switch back to ‘ SERVICE ’.
The service hose will now draw propylene glycol solution from the bucket, and the brine dis-
charge service hose will return it. Run the feed pump and circulate the propylene glycol for 20
minutes.
8. Stop the feed pump by switching the toggle switch back to ‘ RUN AUTO ’. Drain the seawater
strainer, the hose leading to the boost pump module, and the hose between the boost pump
module and the feed pump module. Disconnect the product tubing from the membrane housing
and blow residual water out of the tubing. Empty the charcoal filter housing and flush water
lines. Leave the pressure relief valve open, since the next time you run the system you will need
to purge the system unpressurized.
Your watermaker is now protected from freezing and biological growth and freezing for one year.
Connecting brine discharge ser-
vice hose
Removing hose to sea strainer
from the “ to strainer ” pigtail.
Attaching intake service hose to
hose to sea strainer.