Horizon Reverse Osmosis Seafari Versatile SFC-1400-2, Owner'S Manual

Page: 106 / 162

HRO
Systems
Horizon
Seafari
“Section K” Maintenance and Repair
Page K - 5
the top of the bowl and take care to not damage it.
Clean the mesh screen filter element with a bristle
brush and water spray.
Wipe the O-Ring with a damp cloth. Lubricate it
sparingly with O-Ring lubricant. Place the O-Ring
back onto the bowl. Insert the cleaned, or a new,
plankton filter element into the bowl. Screw the
bowl on clockwise.
6.
Multi Media Filter [6]: Backwashing:
When the Media Filter becomes packed with
suspended solids, it must be backwashed. This
process unpacks the silica sand and dislodges the
suspended solids from the sand.
If replacing the media, the Multi Media Filter
requires approximately 15 lbs (7 kg) of small
gravel (1/8 x 1/4 inch) on the bottom then
approximately 26 lbs (12 kg) of #20 silica sand on
top of the small gravel.
To backwash the Multi Media Filter: Open the
Inlet Sea Cock Valve [2]. Position the Inlet
Clean/Rinse Valve [5], if installed, to the normal
operating position towards the Sea Strainer [3].
Position the Multi Media Filter Valves (3 each
valves) as shown in the diagram on the right for
Multi Media Filter Back Wash. Press the “Booster
Pump” switch. Allow this back washing to
continue for 10 minutes.
After 10 minutes of back washing press the “Stop”
switch to stop the Booster Pump.
Position the Media Filter Valves as shown in the
diagram below for Multi Media Filter Rinse.
Press the “Booster Pump” switch. The Booster
Pump [5] now rinses the Multi Media Filter [7] to
waste [11].
After 5 minutes of rinsing press the “Stop” switch
to stop the Booster Pump.
Position the Multi Media Filter Valves as shown in
the diagram below.
7.
Pre-filter Element Replacement: The pre-filter
elements must be cleaned, or replaced, when
plugged to the extent that the Low Pressure Gauge
at the control panel reads below 10 PSI. At or
slightly below 6 PSI the Low Pressure Switch shuts
the System off. The standard Pre-filters and the
commercial Pre-filter are both discussed on the
following page.
Filling Plug
PSI Differential with
Clean Media:
5 psi @ 4.2 gpm
4 psi @ 3.5 gpm
3 psi @ 2.5 gpm
Valves Positioned
for Emergency
Media Filter Bypass
Waste Discharge
of Multi Media Filter
To
Multi Media Filter Waste
Overboard Dump Fitting
Inlet of Multi Media Filter
From
Booster Pump Outlet
or
Fresh Water Flush Outlet
Outlet of Multi Media Filter
To
Prefilter Inlet
VALVE POSITIONING OF THE MULTI MEDIA FILTER
DURING 4 SEPARATE MODES OF OPERATION
Valves Positioned
for
Normal Operation
Valves Positioned
for
Media Filter Back Wash
Valves Positioned
for
Media Filter Rinse