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98-0157 Rev P
A final prompt is displayed PASS WATER QUALITY. Depress to accept water quality. This
acknowledges acceptance that the samples have passed water quality test (see above). If water does
not meet standards additional rinses are preformed until it does.
If any alarm messages are displayed during the clean, then refer to the fault finding section in this
manual.
8.3
Approved Chemicals
AmeriWater supplies a comprehensive range of chemicals for management and cleaning of RO
membranes and distribution loops. Clean with AmeriClean B first then A.
The following chemicals are approved for use on the
MediQA
:
AmeriClean A
This is a low pH RO membrane cleaner to remove hardness scale and iron oxide deposits.
To test for the presence of AmeriClean A in permeate, check that the conductivity is less than
30μS/cm and pH is at or near 7.
AmeriClean B
This is an alkaline liquid cleaner containing organic sequestrant, inorganic sequestrant, detergent
and emulsifiers. AmeriClean B is used for removing organics, Silica, inorganic colloids, and biological
material.
To test for the presence of AmeriClean B in permeate, check that the conductivity is less than 30
μ
S/cm and pH is at or near 7.
NOTE:
Always refer to Safety Data Sheets before handling any of the cleaning chemical
products. Wear the safety equipment recommended. Follow the instructions on the pack.
8.4
RO Heat Disinfect Procedure
A heat disinfection routine is provided to kill waterborne bacteria. Heat disinfection, when
completed regularly, reduces the potential for harmful biofilms to generate within the machine pipe
work and system components.
The MediQA unit can be set up to complete automatic heat disinfections or heat disinfections can be
started manually.
8.4.1
Manual RO Heat Disinfection
From the OPERATION MENU select RO HEAT DISINFECTION. Heat disinfection settings must be
established in the SETTINGS MENU (see Section 6).
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