GE E4H Series Operation And Maintenance Manual page 16

The proper adjustment of these valves is critical to the operation of the RO
machine. The concentrate valve determines the amount of rejected water
leaving the machine, and creates the operating pressure shown on the
pressure gauge. The recycle valve returns unused reject flow back into the
inlet stream to the RO pump. It is important to balance the operating pressure
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 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 Appendix A - Lakewood Model 2450 Installation and Operation
Manual for operating instructions. The factory alarm setpoints are as follows:
Low Inlet Pressure
Low pH
High pH
pH Control
High Temperature
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 operate
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.
CAUTION: Operation of the pump backwards for even a short time can
cause damage to the pump.
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 operating, be
E4H Series
Operation & Maintenance Manual
12 psig
2.0
8.0
5.6-6.2
120°F (39°C)
16