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 gradually 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 completely closed and your pressure is below 250 psi (17.2 bar).
The concentrate flow control valve has a drilled orifice to ensure a predetermined 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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