WET GRO, Инструкция по установке, эксплуатации и обслуживанию

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Cleaning
In normal operation, the membranes in the GRO system pressure vessel(s) become fouled by mineral
scale, biological matter, colloidal particles and insoluble organic constituents. Deposit build up on the
membrane surfaces can cause loss of water output, loss of salt rejection, or both.
The membranes should be chemically cleaned whenever the GRO unit flows and/or
pressures vary by more than 10% from the initial operating conditions.
Several conditions can cause a reduction in the water quality and/or water production. The following
items should be checked before considering cleaning.
1. Temperature change
This GRO unit is designed for water at 25 degrees C and 250 MG/L TDS. Lower water
temperature will result in LESS water passing through the membrane. Higher water
temperature will result in MORE water passing through the membrane. As a rule, at a
given pressure and TDS level, for each one degree change in water temperature the
change in water production is approximately 2%. Thus, if the water temperature is 5
degrees C, the amount of water produced will be 40% less than at 25 degrees C.
2. TDS level increase
As the TDS (Total Dissolved Solids) level climbs, the amount of water passing through
the membrane decreases. If the TDS level has climbed since the time of installation the
unit will produce less water. Check the TDS level of the feed water and compare it with
the TDS level at the time of installation. If the TDS levels have climbed, the rejection rate
will have to be increased to reduce the TDS level build-up within the membrane. Use the
TDS tester #661-10 for up to 1250 MG/L.
3. Prefilters plugged
Five Micron - A dirty prefilter can reduce the amount of water and the pressure going to
the GRO unit. If the cartridge appears dirty it should be cleaned or replaced. On
extremely dirty water a larger prefilter may be needed. When cleaning the prefilter, check
its condition. If signs of wear appear, replace it immediately.
Activated Carbon - The activated carbon prefilter is used to reduce the volatile organic
substances and chlorine. It should be changed every 6 months or sooner if chlorine is
detected after the activated carbon tank.
4. Change in flow rates or water pressure change
Check the product and reject flow rates to determine any change from normal conditions.
Adjust the flows and pressures if necessary to maintain the proper settings.