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inlet stream to the RO pump. It is important to balance the operating pres-
sure and the respective flows of these valves to ensure that your machine
is operating correctly. It is also important to understand the relationship of
these two valves, the pressure gauge, and your RO pump. The pump has
a fixed amount of flow produced, and the valves are the control devices to
distribute this fixed flow amount. The pressure gauge is an indicator of
applied membrane element pressure, at the flows set by the valves.
10. Turn the ON/OFF switch to the ON position. Water will begin to flow
through the machine at this point but the pump will not start. Allow the
machine to operate in this manner for 10 minutes, to purge the air out of
the machine. Verify alarm set points in the Lakewood 2450 Reverse
Osmosis controller.
Consult the Lakewood Model 2450 Installation and Operation Manual
(P/N 1109695) for operating instructions. The factory alarm set points are
as follows:
Low Inlet Pressure 12 psig (0.83 barg)
Low pH 2.0
High pH 8.0
pH Control 5.6 - 6.2
High Temperature 120°F (49°C)
NOTE
: The high-pressure pump should not be operating at this time.
11. As your machine is filling check for leaks and repair as needed.
12. Turn the ON/OFF switch to the OFF position.
13. Energize the power source to the motor starter. The pump should not oper-
ate at this point.
14. Check the rotation of the high-pressure pump by briefly turning the
ON/OFF switch to the ON position. Watch the motor, or coupling shaft,
for direction of rotation. The motor should rotate clockwise as one looks
at the motor end of the high-pressure pump. If the motor is not rotating
clockwise, change any two of the three leads (for three-phase) in the
motor starter and recheck rotation. Always turn the power off to change
any wiring.
W
ARNING
: OPERATION OF THE PUMP BACKWARDS, EVEN
FOR A SHORT TIME, CAN CAUSE DAMAGE TO
THE PUMP.
15. Turn the ON/OFF switch to the ON position. The high-pressure pump will
operate and the machine will begin to build pressure. As you are operat-
ing, be sure to watch the pressure gauge on the instrument panel. The
machine is designed to operate at 220 psi (15.2 bar).
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