AmeriWater MRO2X, Operation & Maintenance Manual

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MRO2X
– 5X Manual
- 25 -
98-0058
Rev. R
5.4 MEMBRANE FLUSH FEATURE (AUTO FLUSH)
The MEMBRANE FLUSH FEATURE is the preferred means for minimizing bacterial growth for
the MRO2-5X during periods of low water usage. Ordinarily these sizes of MRO are connected
to a loop or storage tank only having 1-2 days of non-use when dialysis procedures are not
being carried out. The MRO2-5X can be set up to discourage microbiological growth by
“flushing” periodically.
The Membrane Flush feature is disabled as a default from the factory for MRO2-5X models.
Refer to the default setpoints in Section 6.4. If these default settings do not meet your
particular need, then they can be changed. See Section 6.5 on how to change from the default
settings.
FLUSH MODE RO PUMP INLET VALVE DIVERT VALVE
3
(FOR STORAGE TANK APPLICATIONS)
ON OPEN ENABLED
4
(FOR LOOP APPLICATIONS)
ON OPEN DISABLED
FLUSH MODE #3 assumes that the MRO is connected to a storage tank and, therefore, will
divert the PRODUCT WATER to the drain. This minimizes bacterial growth and directs all the
water to the drain, rather than refill the storage tank.
FLUSH MODE #3 will cause all the water
to be diverted to drain for each MEMBRANE AUTO FLUSH cycle.
On the other hand, when an
MRO is connected to a Direct Feed Loop , the PRODUCT water
should be directed into the loop during the MEMBRANE AUTO FLUSH cycle to keep the water
in the loop “fresh”. Setting the
FLUSH MODE for #4 will disable the DIVERT TO DRAIN
feature, and the PRODUCT WATER will be circulated through the loop during each
MEMBRANE AUTO FLUSH cycle. The MEMBRANE AUTO FLUSH will operate while the MRO
is in the STANDBY mode, while connected to the loop even though no water is being used for
dialysis.
SETPOINT SETTING
Flush Type
6 (Off hours)
Flush Time 15 to 45 (minutes)
Flush Mode 3 (Inlet valve open, pump on)
Flush Interval 4 to 12 (hours)
The MRO must be connected to the electric power source, incoming water supply, and drain at
all times for this feature to be operable.
The Flush Time and Flush Interval settings are recommended settings, but may be adjusted to
fit your specific needs. Contact your AmeriWater representative for guidance.