Sea Recovery SRC Aqua Matic 450-1 Owner's Manual page 212

8. Inline Vacuum / Pressure Gauges [8]: If the Vacuum/Pressure gauge needle does not move; or does not register
proper vacuum or pressure this may be caused by a plugged orifice. The Vacuum/Pressure Gauges have a very
small orifice at the bottom of the pipe fitting end. This orifice can become plugged with debris or corrosion.
Using a small diameter wire clean the debris from the orifice. Replace the gauge if cleaning of the orifice does
not restore functionality.
9. T-Connector Pressure Pick-Up [9]: Replace any hose or tube that is kinked. Disconnect each end of the tube
and blow air through the tube to ensure that it is not blocked. Replace if damaged.
10. Pressure Transducer [10]: The Pressure Transducers are not repairable and can not be calibrated. If
inoperative check connections at the Transducer and at the Printed Circuit Board to ensure there is no visible
corrosion or loose connections.
11. Plankton Filter [11] Element Cleaning:
1. Unscrew the bowl counter clockwise.
2. Remove the Plankton Filter Element(s) from the bowl(s).
3. Remove the O-Ring(s) from the top of the bowl(s).
4. Clean the mesh screen filter element(s) with a bristle brush and water spray.
5. Wipe the O-Ring(s) with a damp cloth.
6. Lightly, sparingly, lubricate the O-Ring(s) with O-Ring lubricant.
7. Place the O-Ring(s) back onto the bowl(s).
8. Insert the cleaned or new plankton filter element(s) into the bowl(s).
9. Screw the bowl(s) on clockwise.
10. Hand snug to seal the O-Ring; do not use a wrench or other tool to tighten; do not over tighten. Over
tightening transfers stress to the lid and bowl threads causing the lid or bowl to fail (crack or break) and
making subsequent disassembly difficult.
12. Multi Media Filter [12] Backwash:
The Multi Media Filter contains fine gravel and #20 silica sand. This silica sand traps suspended solids larger
than 20 micron. The top layer of the silica sand within the Multi Media Filter becomes packed with suspended
solids and restricts flow through it. When the silica sand becomes packed with suspended solids, as indicated
by a loss of pressure across it, it must then be back washed to waste. This back washing procedure fluffs the
silica sand and dislodges the suspended solids from the sand base. During back washing the suspended solids
are discharged to waste through the Multi Media Filter Waste outlet [36].
If replacing the media, the Multi Media Filter requires approximately 15 lbs (7 kg) of small gravel (1/8 x 1/4
inch) first (on the bottom) then approximately 26 lbs (12 kg) of #20 silica sand last (on top of the small gravel).
NOTE: the new gravel and sand contain fines and contaminates. The Multi Media Filter must be back washed
prior to use.
section 8 page 10 of 30
Aqua Matic 450-1800 Rev. A