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Stulz UltraWater Series - User Manual

Stulz UltraWater Series
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STULZ the natural choice
STULZ UltraWater
®
3 Stufen-Umkehrosmosesystem
Version 05-2012
Technical Manual Humidi cation
Technical Manual
Humidi cation
STULZ UltraWater
3-stage reverse osmosis systems
Version 01-2015
1000645 / EN
Translation of the original User Guide
– Read carefully before use-
– Keep in a safe place for future reference-

Table of Contents

Questions and Answers

  • B
    Brian HinesAug 1, 2025
    How to fix Stulz UltraWater Water Filtration Systems that does not switch on?
    • S
      snowjenniferAug 1, 2025
      If your Stulz Water Filtration System isn't switching on, several factors could be at play. First, ensure the system is connected to the drinking water mains and the tap is turned on. Check that the inlet water pressure is at least 1 bar. Verify the transformer is plugged into a live socket. Also, the system will not start if the pressure tank is full; it needs to be roughly half empty. If these steps don't resolve the issue, the transformer, solenoid valve, intake pressure switch, or tank pressure switch may be faulty and require replacement.
  • C
    Carolyn KaiserAug 5, 2025
    Why my Stulz UltraWater does not produce enough pure water?
    • W
      Whitney RoweAug 5, 2025
      If your Stulz Water Filtration System isn't producing enough pure water, it could be due to several reasons. The consumer might be using more water than the system's nominal throughput, in which case you should replace the system with a more powerful one. Extremely cold supply water can also cause this issue, requiring a more powerful system. Other potential causes include a faulty pressure pump (replace the pressure pump), a clogged prefilter (replace the prefilter insert), or reduced membrane throughput (replace the membrane; consider softened water or a hardness stabilization filter if the decline was rapid).
  • L
    lawrencejaredAug 9, 2025
    What to do if the pure water quality from Stulz UltraWater Water Filtration Systems is too poor?
    • J
      johncohenAug 9, 2025
      If the pure water quality from your Stulz Water Filtration System is too poor, several factors could be responsible. A faulty water quality monitoring system may be the cause, so check or replace it. An extremely contaminated prefilter can also degrade water quality, so replace the prefilter insert. Additionally, if the pure water quality of the untreated water is too poor, consider installing a deionizer behind the membrane or choosing a system model with a higher retention rate. A blocked membrane can also affect water quality, requiring membrane replacement. If the membrane quality declined rapidly, consider using softened water or a hardness stabilization filter.
  • B
    Benjamin FordAug 14, 2025
    Why Stulz UltraWater does not switch off?
    • J
      jacobmorganAug 14, 2025
      Your Stulz Water Filtration System might not switch off if the consumer is still using water; the system switches off only when water use ceases and the pressure tank is full. Alternatively, a faulty tank pressure switch could be the reason; in this case, replace the tank pressure switch.
  • R
    rebecca44Aug 18, 2025
    What causes Stulz UltraWater to switch on and off rapidly?
    • M
      Morgan MatthewsAug 18, 2025
      If your Stulz Water Filtration System is switching on and off in rapid succession, the pressure tank valve might be closed; try opening it. Alternatively, the pressure tank itself may be faulty and require replacement.
  • C
    Connie CaldwellAug 22, 2025
    Why does Stulz UltraWater Water Filtration Systems switch on by itself?
    • N
      Nicole MartinAug 22, 2025
      If your Stulz Water Filtration System switches on regularly even when no water is being used, a faulty non-return valve is likely the cause. Replacing the non-return valve should resolve this issue.
  • B
    Barry MercadoAug 27, 2025
    Why is there no waste water flowing from my Stulz UltraWater Water Filtration Systems?
    • J
      joshua28Aug 27, 2025
      If no waste water flows during the operation of your Stulz Water Filtration System, check if the waste water hose (red) is kinked and remove the kink. If the hose is not kinked, the flow restrictor may be faulty and require replacement.

Summary

Safety Instructions

Proper use

Details approved uses and limitations of the STULZ UltraWater system.

Personnel qualification

Specifies qualifications required for electrical, operational, and maintenance personnel.

Safety instructions for the plant owner;operator

Outlines responsibilities for safe operation and hazard exclusion.

Safety instructions for maintenance, inspection and installation work

About this Device

The principle of the reverse osmosis system

Technical data

Installation

Assembly

Connection diagram

Installing the membrane

Electrical connection

Start-Up

Operation

Shutting down the system

Maintenance

Replacing the filters

Procedure for replacing the prefilter and afterfilter inserts.

Replacing the membranes

Steps for removing and installing new reverse osmosis membranes.

Checking the pure water quality and throughput

Methods for verifying water quality and system output.

Troubleshooting

Stulz UltraWater Series Specifications

General IconGeneral
Flow Rate1.0 GPM
Operating Pressure40-100 PSI
Operating Temperature40-100°F
Flow Rate (High)1.0 GPM
Operating Pressure (Low)40 PSI
Temperature Range40-100°F

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