Viessmann VS 34 User Manual (English)

Questions and Answers:

J
Joann RuizAug 7, 2025
How to fix Viessmann Water Dispenser not producing soft water?
- C
  Christopher AriasAug 7, 2025
  If your Viessmann Water Dispenser isn't producing soft water, it could be due to several reasons. First, check if the salt storage tank is empty and add salt if needed. Also, the salt might have formed a 'bridge'; if so, break it up. Ensure the power supply is properly connected and the outlet is functioning. The bypass valve(s) should be in the service position. The nozzle and venturi assembly might be dirty, plugged, or damaged, requiring cleaning and inspection. Finally, inspect the drain hose for any kinks, bends, or obstructions.
G
georgemeganAug 13, 2025
Why is Viessmann Water Dispenser water hard sometimes?
- S
  Sarah GalvanAug 14, 2025
  If the water from your Viessmann Water Dispenser is sometimes hard, there might be a few reasons. It could be due to hard water being bypassed during recharge because the current time or recharge time settings are incorrect, so check and correct these settings. Also, the hardness number setting might be too low, so check the current hardness setting and increase it if needed. Avoid using hot water during recharges, as the water heater refills with hard water. An increase in the actual hardness of the water supply might also be the reason, so test an unsoftened water sample and adjust the hardness setting accordingly. Finally, the turbine might not be turning freely, so check the turbine.
D
Dustin VangAug 19, 2025
What to do if Viessmann VS 34 motor stalled or clicking?
- S
  Steve MartinAug 19, 2025
  If your Viessmann Water Dispenser motor is stalled or clicking, it indicates a motor malfunction or an internal valve fault creating high torque on the motor. In this case, you should contact a service technician.
T
Taylor HoffmanAug 25, 2025
What does error code E1, E3 or E4 on Viessmann Water Dispenser mean?
- T
  Thomas MarshallAug 26, 2025
  If your Viessmann Water Dispenser displays error code E1, E3, or E4, it suggests a fault in the wiring harness, connections to the position switch, switch, valve, or motor. It is recommended to contact a service technician.
M
michael00Aug 31, 2025
What does error code E5 on Viessmann VS 34 mean?
- J
  James MartinAug 31, 2025
  If your Viessmann Water Dispenser displays error code E5, it indicates an electronic control malfunction. In this situation, you should contact a service technician.

Viessmann VS 34 Specifications

General

Brand	Viessmann
Model	VS 34
Category	Water Dispenser
Language	English

Summary

Owner's Manual Overview

English Owner's Manual

The primary owner's manual in English, detailing operation and features of the water softener.

French Owner's Manual

The owner's manual translated into French, providing operational guidance for the water softener.

Dutch Owner's Manual

The owner's manual in Dutch, offering instructions for operating the Viessmann water softener.

Italian Owner's Manual

The owner's manual in Italian, covering the operation and maintenance of the water softener.

Specifications and Dimensions

Installation Requirements

Location, Plumbing Codes, and Air Gap

Covers site selection, code compliance, and air gap needs for proper installation.

Valve Drain and Plumbing Connections

Details on drain hose requirements and inlet/outlet pipe options for the softener.

Unit Preparation and Placement

Steps for turning off water, assembly, and positioning the water softener unit.

Inlet and Outlet Plumbing Details

Specifics on connecting water supply to the softener's inlet and outlet ports.

Grounding, Drains, and Leak Testing

Instructions for electrical grounding, drain hose setup, and performing leak checks.

Final Assembly, Sanitization, and Controller Setup

Steps for adding salt/water, connecting power, sanitizing, and initial controller programming.

Bypass Blending Valve Operation

Service and Bypass Valve Positions

Explains the functions of the service and bypass modes and how to adjust water hardness.

Programming the Water Softener - Setup

Initial Setup Wizard Steps

Guides through initial setup for language, time, hardness, salt, and iron levels.

Status Screens and Alerts

Describes softener status displays, error messages, and flashing backlight indicators.

Main Menu and Display Message Handling

Navigating the main menu and understanding long display screen messages.

Salt Level and Low Salt Alarm Settings

How to set the salt level and configure the low salt alarm notification.

Recharge and Current Time Configuration

Procedures for initiating recharges and setting the unit's current time.

Recharge Time, Hardness, and Iron Level Settings

Adjusting recharge schedules, water hardness, and iron levels.

Rolling Screens and Language Preferences

Customizing displayed status screens and selecting the user interface language.

Hardness Unit Configuration

Selecting the preferred units (grains or PPM) for water hardness measurement.

System Information and Usage Data

Accessing model details, water usage statistics, and operational history.

Cycle Time Adjustments

Modifying time settings for backwash, rinse, and other regeneration cycle phases.

Special Features Configuration

Adjusting efficiency modes, recharge intervals, and the 97% feature.

Diagnostics and Troubleshooting Procedures

Using the diagnostics screen to check component status and troubleshoot issues.

Setup Changes and Auxiliary Output

Resetting setup, redoing configuration, and understanding the auxiliary output function.

Routine Maintenance

Salt Management and Brine Tank Maintenance

Guidelines for refilling salt, identifying and breaking salt bridges.

Cleaning Key Components

Instructions for cleaning the nozzle/venturi assembly and resin bed.

Troubleshooting Guide

Initial Checks and Common Problems

Basic troubleshooting steps and common issues like no soft water or motor problems.

Electronic Diagnostics and Turbine Checks

Using automatic diagnostics and checking the water flow turbine's functionality.

Manual Diagnostics and Service Issues

Performing manual diagnostic checks and addressing other service-related problems.

Softener Exploded View

Softener Parts List

Valve Exploded View

Valve Parts List

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