Owner's manual

LAKOS Plum Creek Intake Screens
Installation Guide
Pre-installation Check List
1. Consult the Flow Rates & Pressures on the reverse side for the pumping
pressure range required on the backwash line at the PC Screen. Note: If pressure
is less than the minimum required to operate the screen and backwash system, a
booster pump is required
2. IMPORTANT: The PC Screen is a water-pressure driven and backwashed device.
If the screen does not have the required pressure delivered to the return line
connection at the screen, the screen will not work. Carefully measure the return
line size to insure that the proper pressure is delivered to the PC Screen. Do not
install a backwash line smaller than that recommended.
3. Be sure you will not be pumping at a rate in excess of your PC Screen’s
maximum  ow range.
4. It is very important to thoroughly  ush sand, pebbles, insects, glue and any
other debris from the backwash line before installation start-up. Failure to do
this could result in plugged spray jets inside the PC Screen.
5. Make certain the pump’s suction/inlet pipe is properly supported and
su ciently elevated to allow your PC Screen to rotate freely.
6. Your PC Screen should not be installed:
a) Closer than 6-inches (155 mm) to any object.
b) In a con ned area (side culvert, large pipe, etc.) with no means of transferring
debris away from the screen.
c) In a current over 3 mph (4.83 km/hr), unless it is protected by an upstream
barricade or bell-shield.
INSTALLATION
1. Attach the PC Screen’s  anged outlet to
pump’s suction/inlet pipe, using an appropriate
adapter, if required. Consult your LAKOS
representative if you have questions.
2. Plumb one end of the backwash line into
your pump’s discharge pipe.
3. Thoroughly  ush the backwash line of any
debris.
4. The backwash line should be plumbed
between the pump and a main line valve. This
valve can then be partially closed to create
su cient back-pressure during start-up. Note:
If pressure is inadequate for e cient backwash
operation, a booster pump will be necessary.
5. Install on the backwash line:
a) a properly-sized gate valve (or pressure
regulator if pressure exceeds 100 psi/6.9 bar);
b) an 8-mesh strainer (supplied); and
c) a pressure gauge.
PC
PC
Installation & Operation
OPERATION
1. Screen does not need more than 2-inches
of submergence because the screen’s
rotation breaks up any vortex that might
form.
2. Screen should rotate at a rate of at least
15 RPM.
3. Backwash jets should be pointed
a) downstream or toward the opposite
embankment when installed in moving
water,
b) toward the center when used in still
bodies of water, and
c) toward the surface when screens are
deeply submerged. The direction of these
spray jets can be easily set by rotating the
 ange on the screen’s outlet pipe to adjust
the position of the spray bar.
4. To prevent impeded screen rotation
or actual damage, the PC must be safe-
guarded in extremely swift currents (over 3
mph {4.83 km/hr}) or in moving water with
unusually large debris, such as logs. Either
a bell-shield attached to the PC Screen
 ange or an upstream barricade can o er
the necessary protection. If a barricade is
used, it must
a) be situated at least 6 to 8-inches (152 to
203 mm) from the screen and
b) provide enough clearance underneath
to allow water to  ow to create a
depression under the screen to prevent
silt build-up. (Consult factory for design
assistance.)
5. Adding a Screen Retrieval System
to lift your PC Screen out of the water
during periods of inactivity is always
recommended and can prevent algae
growth on the screen’s mesh covering.
Typical installation
FLOW TO
SYSTEM
NOTE: TO ACHIEVE
NECESSARY
BACKWASH PRESSURE,
A BOOSTER PUMP MAY
BE REQUIRED HERE.
GATE
VALVE
IN-LINE
STRAINER*
PRESSURE
GAUGE*
TO BACKWASH
NOZZLES
LAKOS PLUM CREEK
SCREEN*
1/4” TUBING
CHECK
VALVE
SUCTION
FLOW
AUTOMATIC PUMP
SAFETY SHUT-OFF
CONTROL
SYSTEM
PUMP
PUMP DISCHARGE
(MAIN LINE)
BUTTERFLY
VALVE
*Provided with basic system