Stiebel Eltron WST fitting for small pressure less tanks Installation Guide

: June 5, 2024
: STIEBEL ELTRON

WST fitting for small pressureless tanks

OPERATION AND INSTALLATION

Tap for open vented water heaters

STIEBEL ELTRON

CONTENTS | OPERATION

General information

OPERATION

1. General information

The chapter “Operation” is intended for appliance users and qualified
contractors.
The chapter “Installation” is intended for qualified contractors.

Note
Read these instructions carefully before using the appliance
and retain them for future reference.
Pass on the instructions to a new user if required.

1.1 Safety instructions

1.1.1 Structure of safety instructions

KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
‣ Steps to prevent the risk are listed.

1.1.2 Symbols, type of risk

Symbol

Type of risk
Burns
(burns, scalding)

1.1.3 Keywords

KEYWORD Meaning

DANGER Failure to observe this information will result in serious
injury or death.

WARNING Failure to observe this information may result in serious
injury or death.

CAUTION Failure to observe this information may result in non-serious
or minor injury.

1.2 Other symbols in this documentation

Note
General information is identified by the symbol shown on the left.
‣ Read these texts carefully.

Symbol Meaning
Material damage
(Appliance and consequential losses, environmental pollution)
Appliance disposal

‣ This symbol indicates that you have to do something. The action
you need to take is described step by step.

Safety

1.3 Units of measurement
Note
All measurements are given in mm unless stated otherwise.

2. Safety

2.1 Intended use

This product is intended for operation with an open vented
(non-pressurized) under sink water heater.

– WST for washbasins
– WUT for kitchen sinks

This product is designed for domestic use. It can be used safely by
untrained persons. The appliance can also be used in a non-domestic
environment, e.g. in a small business, as long as it is used
in the same way.

Any other use beyond that described shall be deemed inappropriate.
Observation of these instructions is also part of the correct
use of this appliance.

3. Operation

Note
When the water in the water heater is being heated, expansion
water will drip from the outlet.
With non pressurized water heaters with anti-drip function,
the expansion water remains inside the water heater.

1 Swivelling spout
2 Aerator inside the fitting
3 Draw-off valve
4 Temperature regulating tap head

4. Cleaning and care

‣ Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning and caring for the product.
‣ For descaling, remove the aerator from the fitting.

5. Safety

Only qualified contractors should carry out installation, commissioning
as well as maintenance and repair of the product.

5.1 General safety instructions

We guarantee trouble-free function and operational reliability
only if the original accessories and spare parts intended for the
appliance are used.

WARNING Burns

During operation, the tap can reach temperatures in excess
of 60 °C.
! Material damage
Scale build-up can block the outlet and thus subject the
water heater to pressure.
‣ Never block the spout, and use only aerators for
non-pressurised taps, otherwise the water heater
could be damaged.

5.2 Instructions, standards and regulations

Note
Observe all applicable national and regional regulations
and instructions.

6. Appliance description

Standard delivery
WUT illustration

Swivelling spout with aerator and non-return valve to prevent dripping
Tap body
Gasket
Spring sleeve
Mating fitting (spanner size 13)
WUT: Moulded plastic fitting for kitchen sink installation
Butterfly valve
Fitting G 3/8

7. Installation

‣ Secure the tap with gasket, spring sleeve and mating fitting.
‣ WUT: Use the moulded plastic fitting to secure the tap in the kitchen sink.
‣ Fasten the spout to the tap body.

7.1 Water connection

! Material damage
With non-pressurised water heaters, observe the maximum
permissible flow rate when the tap is fully open
(see chapter “Specification / Data table”).
‣ If the flow rate is exceeded, install the supplied butterfly
valve in the cold water line.

! Material damage
The water heater can leak.
‣ Never subject the water heater to water pressure.
‣ Do not interchange the connection hoses.

Note
Ensure that the connection hoses are not kinked or under
tension during installation.

‣ Connect the short connection hose to the angle valve of the
cold water supply line.
‣ Connect the long connection hose marked blue to the “Cold
water inlet” connection on the water heater.
‣ Connect the long connection hose marked red to the “DHW
outlet” connection on the water heater.

8. Commissioning

‣ Thoroughly flush the cold water supply line.
‣ Filling the water heater: Turn the temperature adjusting tap
head to max. temperature (fully anti-clockwise) and open the
draw-off valve.
‣ Wait until water flows from the outlet, then switch on the
water heater.

9. Specification

9.1 Dimensions and connections

WST

9.2 Data table

WST WUT
232620 232604
Application Basin Sink
Type open open
Type of installation Single hole mixer tap Single hole mixer tap
Surface chrome finish chrome finish
Connection Connecting hoses Connecting hoses
Max. throughput l/min 5/10 5/10
Max. permissible pressure MPa 1 1
Outlet height mm 135 190
Reach mm 140 185
‣ Bear in mind that, depending on the static pressure, you may
also need a pressure reducing valve.

WUT

Guarantee

The warranty conditions of our German companies do not
apply to appliances acquired outside of Germany. In countries
where our subsidiaries sell our products, it is increasingly the
case that warranties can only be issued by those subsidiaries.
Such warranties are only granted if the subsidiary has issued
its own terms of warranty. No other warranty will be granted.
We shall not provide any warranty for appliances acquired in
countries where we have no subsidiary to sell our products.
This will not affect warranties issued by any importers.