Stulz UltraWater 120 basic - Replacing the Flow Restrictor; Inspecting the Pressure Tank

STULZ UltraWater 3-stage reverse osmosis system SUW Maintenance
© STULZ GmbH, Hamburg
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12.3. Replacing the ow restrictor
When the membrane is replaced, you should always replace the ow restrictor at the same time.
Proceed as follows to replace the ow restrictor:
1
Disconnect the system from the mains voltage.
Turn off the water supply.
2
Close the valve of the pressure tank.
3
To disassemble, squeeze the clamping sleeve and
pull off the hose.
4
Fit the new ow restrictor.
5
To bring the system back into operation, perform
steps 1-6 from section 9 "Start-up".
Flow restrictor
12.4. Inspecting the pressure tank
To ensure reliable function, the pressure tank must be inspected regularly (include in the regular mainte-
nance cycle, in accordance with local conditions).
The maximum permitted operating pressure must not exceed 3.5 bar. The air pressure when empty is
approx. 0.2 bar.
Hose
Clamping sleeve
Hose