10
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Pre-filter:
If the tap water is not extremely polluted, a yearly replacement of both pre-filters
will be sufficient. If the water is higher polluted, the filters have to be changed more often - as
required. If the pre-filter is blocked, the water production will slow down.
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Membrane:
The membrane has a lifetime of several years. Afterwards, it has to be replaced.
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Flushing valve:
The flushing valve is a part with limited lifetime. In case of a decrease of the
adjusted water flow, the valve is encrusted with calcium and can be cleaned using acid (e. g.
vinegar). If the water flow increases, the valve has to be replaced.
5. Failures
- Waste water flow rate is too high:
Close the flushing valve. If this is not possible, the
flushing valve has to be replaced and the membrane power to be checked.
- Waste water flow rate is too low:
Check if the pre-filter is blocked. The water pressure at
the pressure gauge behind the pre-filters must not be much lower (at the most 0.5 bar) than
the water supply pressure. Maybe change the pre-filter.
- Pure water flow rate is too low:
Check the waste water flow rate. If it is to low too, change
the pre-filter.
- Tap water pressure is too low:
If you are connected to a municipal water supply, you are not
able to have an influence on the water pressure. For the reverse osmosis unit, a minimum water
pressure of 3 bar is required.
- Module is blocked or used up:
The membrane has to be replaced. As spare parts, all
standard „18“ membranes with a daily capacity of 75 - 90 / 120 - 150 l can be used. Only TFC-
membranes made of polyamide/polysulfone should be used. We recommend to use original
Aqua Medic TFC-membranes only.
If you want to use a membrane with a different capacity, you also have to change the flushing
valve.
- Rejection rate is too low:
Check the water flow rates (waste water, pure water). If the water
flow is ok, flush the unit for approx. 60 min. If the rejection rate increases, go on flushing until
the value is acceptable. If the rate does not improve, change membrane.
6. Important Notes
- Connection:
Connect the reverse osmosis unit to cold water supply only. Higher temperatures
increase pure water production but at temperatures more than 40 °C, the membrane will be
destroyed.
- Stopping the unit:
If you stop the unit, always close tap water supply. Never only close the
pure water tap. If you run the unit automatically with a solenoid valve, switch the valve
between pre-filter and module. Take care that waste water and pure water can flow away freely.
- Disconnection of the unit:
If you want to disconnect the unit for a longer period than 6
weeks, you should add Aqua Medic disinfection liquid into the module housing. If the unit is
started again, flush it for 15 to 20 minutes. We recommend flushing also after shorter periods of
stopping, if no disinfection liquid has been used.
- Storage:
The unit has to be stored at temperatures above 0°C. Freezing would destroy the
membrane.
7. Warranty
Should any defect in materials or workmanship be found within 24 months of the date of purchase
AB Aqua Medic undertakes to repair, or at our option replace, the defective part free of charge –
always provided the product has been installed correctly, is used for the purpose that was intended
by us, is used in accordance with the operating instructions and is returned to us carriage paid.
Proof of Purchase is required by presentation of the original invoice or receipt indicating the
dealer’s name, the model number and date of purchase. This warranty may not apply if any model
or production number has been altered, deleted or removed, unauthorised persons or organisations
have executed repairs, modifications or alterations, or damage is caused by accident, misuse or
neglect. Please note that the product is not defective under the terms of this Warranty where the
product, or any of its component parts, was not originally designed and / or manufactured for the
market in which it is used. These statements do not affect your statutory rights as a customer.
AB Aqua Medic GmbH
-
Gewerbepark 24 - 49143 Bissendorf/Germany
- Technical changes reserved – 08/2018
Current manuals are available for download at www.aqua-medic.de.
