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Permeate back pressure will decrease permeate production. See Table 2.5 (Permeate Back Pressure Correction Factors) to calculate loss of permeate. Table 2.5 E2/EZ2-Series Permeate Back Pressure Correction Factors BACK PRESSURE % LOSS OF PERMEATE FLOW PRESSURE CORRECTION FACTOR (PCF) 10 psig (0.7 barg) 5% 0.95 20 psig (1.4 barg) 10% 0.90 30 psig (2.0 barg) 15% 0.80 40 psig (2.7 barg) 20% 0.70 50 psig (3.4 barg) 25% 0.60 60 psig (4.1 barg) 30% 0.50 WARNING: IF PERMEATE BACK PRESSURE EXCEEDS 60 PSI (4.1 BAR) MACHINE DAMAGE MAY OCCUR. WARNING: INSTALLING A CHECK VALVE WILL PREVENT REVERSE FLOW THROUGH THE MEMBRANE ELEMENT WHEN THE MACHINE IS NOT IN OPERATION. REVERSE FLOW, WHEN THE MACHINE IS NOT IN OPERATION, CAN SEVERELY DAMAGE THE MEMBRANE ELEMENTS. 8 2.12 Operation and Maintenance The operation and maintenance of an E2/EZ2-Series RO machine requires regular data recording and routine preventative maintenance. It cannot be emphasized enough the importance of filling out the Daily Log Sheet (Technote 106) during each operating shift. A Start-Up Data Sheet (Technote 101) should have been completed at start-up. The Start- Up Data Sheet contains pertinent facts on the operation of your machine. These two records are invaluable in diagnosing the performance of the equipment, and must be kept for reference. If you have questions concerning the operation of your machine or the method of data recording, contact the manufacturer. Three preventative maintenance procedures, which must be done on a regular basis, are as follows: 1. Change the pre-filter cartridges as needed. 2. The machine needs to run and flush for at least 10 minutes every 72 hours, clock time. 3. Clean the RO membrane elements with approved cleaners at least quarterly, depending on feed water quality. 2.13 Pre-filter Cartridge A 1 micron pre-filter cartridge is factory installed to protect the membrane elements and valves from particles, which may be in the feed water. To order replacements, see the Spare Parts List (Technote 109). A pressure drop across the filter of 8 psi (0.55 bar) or more during operation indicates that the pre-filter cartridge(s) need changeing. Use only GE approved filters rated at 2 microns or less. Refer to Technote 109 (Spare Parts List) for pre-filter cartridge replacements. Do not attempt to clean used pre-filter cartridges. NOTE: Failure to perform normal preventative maintenance procedures will void machine warranty. 2.14 Daily Flushing A manually flush of the E2/EZ2-Series must be done machine daily. To flush the machine: NOTE: During flushing procedure, the machine must be running. STEPS 1. With the machine running, open the concentrate valve 1/2 -3/4 of a turn (Figure 2.1, Flow Control Center). 9 2. Allow the machine to operate with the concentrate valve open 1/2 - 3/4- of a turn (Step 1) for 10 - 15 minutes. 3. After 10 - 15 minutes, return the concentrate valve to its previous setting, and return to normal operation. CAUTION: When opening the concentrate valve, never allow the machine’s primary pressure to drop more than 10% below normal operating pressure (Table 2.3, E2/EZ2-Series Primary Pressure Range). 2.15 Membrane Element Cleaning Periodic cleaning of the machine with appropriate membrane element cleaners will prolong the life of the membrane elements. Local conditions will determine the frequency of cleaning. Cleaning may be required when: 1. The permeate quality begins to decline. 2. The reading on the final pressure gauge begins to change noticeably. GE recommends that you clean your E2/EZ2-Series RO machine every quarter. You may have to clean the RO machine more frequently, depending on the quality of your feed water. Cleaning of the membrane elements is vital because contanimants can build-up on the membrane element surfaces, reducing the permeate flow rate and affecting the quality of the permeate. To clean the membrane elements: NOTE: It is always best to start with the acid or inorganic cleaner. STEPS 1. Remove and replace the pre-filter cartridge (Section 2.14, Pre-filter Cartridge). NOTE: For best results, GE recommend pre-filters be replaced before and after cleaning. 2. In a clean container, collect approximately five (5) gallons (19 Liters) of RO permeate water. 3. Turn machine and water supply OFF. 10 2 E2/EZ2-Series Closed Loop Membrane Element Cleaning NOTE: This clean container will be referred to as the Clean-In-Place (CIP) container. 4. Disconnect and route the inlet, permeate, concentrate lines from their service locations to the CIP container (Figure 2.2 E2/EZ2-Series Closed Loop Membrane Element Cleaning. 5. Connect the CIP feed line to the E2/EZ2-Series machine inlet feed water port (Figure 2.2, E2/EZ2-Series Closed Loop Membrane Element Cleaning). 6. Mix the appropriate cleaning compound in the 5 gallons of permeate water, in the CIP container, according to the cleaning label instructions. 7. Turn machine ON and allow machine to recirculate the cleaning solution for 10 - 15 minutes. NO...

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