GE E4H Series - Manual (Page 21)

NOTE: Do not allow the pressure to exceed 250 psi (17.2 bar). If the
pressure exceeds 250 psi (17.2 bar), open the concentrate flow
control valve until the pressure gauge shows 250 psi (17.2 bar)
or less.
As the machine purges the air and fills with water, the pressure will grad-
ually increase. You should see water flowing through the permeate and
concentrate flow meters. If you do not see flow, turn the machine OFF and
return to Step 1.
WARNING: NEVER ALLOW THE MACHINE TO OPERATE
WITHOUT ADEQUATE WATER PRESSURE. THIS
CAN CAUSE SEVERE DAMAGE TO THE HIGH-
PRESSURE PUMP.
16. Gradually close the concentrate flow control valve. As you close the
valve, watch the pressure gauge and your concentrate flow meter. Close
the valve until your concentrate flow meter displays your design flow, and
you do not exceed 250 psi (17.2 bar). If you reach 250 psi (17.2 bar)
before the valve is completely closed, open the recycle flow control valve
one full turn, then continue to close the concentrate flow control valve.
Continue to close the concentrate flow control valve until it is complete-
ly closed and your pressure is below 250 psi (17.2 bar).
The concentrate flow control valve has a drilled orifice to ensure a prede-
termined amount of flow and pressure in the closed position. This orifice
is sized to operate the machine at 75% recovery.
17. With the concentrate flow control valve fully closed and the pressure
below 250 psi (17.2 bar), gradually close the recycle flow control valve
until the pressure reaches 250 psi (17.2 bar).
Your machine is now operating at the design pressure and flow rates, in a
75% recovery configuration. Your specific needs or conditions may dic-
tate the need to operate the machine at a lower recovery. If you wish to
operate in a recovery configuration lower than 75%, Step 18 (below) will
explain the necessary steps.
18. Your machine is equipped with flow meters and a pressure gauge that will
assist you in setting alternate flow rates for variable recoveries. If you
wish to operate at a recovery lower than 75% you must ensure that the
flow rates for the permeate and concentrate are at desired levels. Some
minor adjustments in the concentrate and recycle flow control valves may
be necessary.
See Table 3.1 (Machine Recovery) below for specified flow rates for var-
ious machine recoveries. When you have selected your desired flow rate,
gradually adjust the concentrate flow control valve to achieve desired
flow and use the recycle valve to bring the operating pressure up to
250 psi (17.2 bar).
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