STULZ UltraWater 3-stage reverse osmosis system SUW
Maintenance plan
© STULZ GmbH, Hamburg
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16. MAINTENANCE PLAN
To ensure correct maintenance, we recommend the following maintenance plan.
Adapt the maintenance intervals to suit the local conditions.
For this, see section 6.6
Filter service li
fe.
Operating company
Location of system
System type
System number
Name of service employee
Date
Inspection of general condition
Cleanliness
No leaks
Condition of electrical components
Check power cable, plugs and housing of transformer, etc. for areas of damage.
OK
Inspect hoses and cables. No kinks.
OK
Inspect filter housings
Check secure fit of filter housings
monthly
. Tighten filter housings by hand if necessary.
OK
Check tank shut-off function
(During operation, the system must shut off within 1 hour when the consumer stops using water.)
OK
Check non-return valve
(With the system shut down, detach the hose connection between the reverse osmosis module and the
non-return valve: water must not flow out of the non-return valve.)
OK
Check intake pressure shut-off function
(The system must shut off within 1...2 minutes when the water supply is turned off.)
OK
Optional hardness stabilization filter at least half full
OK
Filter full
Replace filter
Prefilter (left)
Membrane (center)
Afterfilter
Inspect pressure tank
(If the pure water has been completely drained – undo connection between tank and consumer – the
overall weight of the standard tank must not exceed 2.5 kg.)
If the standard tank weighs more than 2.5 kg, it must be replaced.)
OK
Inspect solenoid valve
(The system must produce water during operation.)
OK
Inspect pressure pump/power supply unit
(The pump must vibrate during operation/the green LED of the electronic power supply unit must light
up.)
OK
Pump/transformer warm
to the touch
Check water temperature
_____ °C
Measure water volumes measured out in liters
Pure water/permeate:
Waste water/concentrate
Calculation of waste water/pure water ratio
_____ l/h
_____ l/h
_____ %
Check water quality (water must flow freely from the system for at least 15 minutes with no consumer
connected)
Pure water/permeate:
Untreated water/supply
Calculation of retention rate (>90% is OK)
_____ µS/cm
_____ µS/cm
_____ %
All system parts free from leaks after system was restarted
OK
Signature of service employee
Copy this sheet before filling it in!