Emperor PWCRO, Manual

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WARNING: NEVER EXCEED THE MAXIMUM PRESSURE RATING OF YOUR SYS-
TEM
Adjust the pump throttle valve and concentrate valve until the correct flow is ach-
ieved. For example, PWCRO-4000 should be adjusted until it produces about 4000
GPD or 2.78 GPM of permeate (product water) at 77°F. The designed flow may be
achieved below 150 PSI but it is IMPORTANT not to exceed 150 PSI on the System
Pressure when adjusting.
75% Recovery System Adjustment
Turn the concentrate valve clockwise until the permeate flow rate and the concentrate
flow rate are at designed standards. Turn the recycle valve until the recycle flow rate is at
the desired rate. If necessary, adjust the pump throttle valve, concentrate valve, and con-
centrate recycle valve until the proper flow rates are achieved
while not exceeding 150
PSI pump pressure and not reducing the pump pressure below 80 PSI. The concentrate
recycle flow rate and the concentrate flow rate must equate to the minimum flux rate or
higher in high flow feeds or damage to the membrane may occur.
Once the flow rates have been adjusted, monitor the system over the first two weeks and
make fine adjustments to maintain the proper flow rates. When there is a change in the
feed water TDS level or temperature, the flow rates may need to be re-adjusted. The re-
cycle flow rate can be determined using the desired Recovery Rate (75% maximum) and
the Permeate Flow Rate. The equation is as follows;
• RO System GPD Rating / 1440 mins (mins in a day) = Permeate Flow Rate GPM
• Permeate Flow GPM / 75% (0.75) = Total Flow GPM
• Total Flow GPM - Permeate Flow Rate GPM = Concentrate Flow GPM
•
Minimum Flux Rate (determined by membrane size / diameter) GPM - Concentrate
Flow Rate GPM = Recycle Flow Rate GPM
• 4.0" Membrane Minimum Flux Rate - 3.0 GPM
Example:
• 2000 GPD System
• 2000 GPD / 1440 Mins = 1.39 GPM Permeate Flow
• 1.39 / 0.75 = 1.85 GPM Total Flow
• 1.85 GPM - 1.39 GPM = 0.46 GPM Concentrate Flow
• 1 (min 2.5" Membrane Flux) - 0.46 GPM = 2.54 GPM Recycle Flow
Once the adjustments are made, the system is operational.
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