Hydrotech FreshPoint U440 Ultrafiltration System - Manual (Page 30)

Page 30
Service & Maintenance
Membrane Storage After Use
After initial use the membranes need to be kept wet at all times. To avoid biological growth during shutdowns or
storage, wet membranes should be treated with a compatible biocide.
Downtime up to 24 hours - no measures required.
Downtime 1 to 15 days – Automatic flushing
Systems that are equipped with automatic time based flush systems (and feed water is available) can
continue to flush automatically provided the flush cycle occurs at least every 24 hours for a minimum of 30
seconds.
Downtime Over 15 days – Automatic flushing
Systems that are equipped with automatic time based flush systems (and feed water is available) can
continue to flush automatically provided the flush cycle occurs at least every 24 hours for a minimum of 60
seconds.
Downtime > 7 days – No Automatic flushing / Membranes stored in place
Membranes should be cleaned and disinfected. The system should be put in bypass. Then fill with a 0.1%
sodium bisulphite solution. Leave membranes installed in the system.
NOTE: DO NOT FREEZE! Take precautions to ensure the FreshPoint™ system is not exposed to
freezing temperatures.
In all cases the membranes must be stored hydraulically filled.
CAUTION: Any time a storage solution is used the membranes must be flushed and sanitized prior to use.
See Membrane Flushing & Disinfection guidelines. An integrity test is recommended.
To replace the membrane element:
Use the bypass valve to bypass the system. Isolate the backflush tank, if applicable.
Run a manual flush by pressing the Extra Cycle button until water no longer comes out of the drain port.
If installed, use the integrity test port to drain the system. It may be useful to open the drain by pressing the
Extra Cycle button to help draining.
Unplug the power cord leading to the system and gently disconnect the cord leading to the flow meter and the
wire harness(es) leading to the solenoid valve(s).
Slowly disconnect the three unions starting with the union located closest to the floor (this will allow any
remaining water to drain from the system).
Loosen the four mounting bolts which fasten the FreshPoint™ to the wall. Lift the system up slightly and pull
away from the wall.
Open the end caps (see page 10 for instructions on installing the vessel head), and slide the membrane
element out of the membrane housing (both end caps may need to be removed so the element can be
pushed out of the housing).
Lubricate the O-rings sparingly with silicone. Replace the end cap on the bottom port.
Install the spacer spring.
Gently slide the new membrane element into the housing.
NOTE: The open distributor tube of the membrane should be oriented up.
NOTE: DO NOT DROP THE MEMBRANE ELEMENT INTO HOUSING-THIS COULD DAMAGE THE
MEMBRANE ELEMENT.
Gently and firmly slide the top adaptor with O-rings into the membrane elements center tube, and fasten the
end cap (See page 13 for instructions on installing the vessel head).
Remount the FreshPoint™ and reattach plumbing. Reconnect the meter cable and wire harness(es).
Put the unit back into service with the bypass valve. Before using system, perform flushing and sanitizing
procedures as listed in the Installation section of this service manual.
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