Viega Prevista Pure User manual

Instructions for Use
Prevista Pure concealed cistern
for floor-standing WC 8 cm
for floor-standing WC, walling in and around, compatible with all
WC flush plates for Prevista
Model Year built (from)
8503 01/2020
INT

Table of contents
1About these instructions for use 3
1.1 Target groups 3
1.2 Labelling of notes 3
1.3 About this translated version 4
2Product information 5
2.1 Standards and regulations 5
2.2 Intended use 5
2.2.1 Areas of use 5
2.3 Product description 6
2.3.1 Overview 6
2.3.2 Technical data 6
3Handling 8
3.1 Assembly information 8
3.1.1 Installation dimensions 8
3.2 Assembly 9
3.2.1 Mounting concealed cisterns 9
3.2.2 Connecting concealed cistern 10
3.2.3 Setting up and bricking in the concealed cistern 13
3.2.4 Setting the flush volume 16
3.3 Cleaning and maintenance 20
3.4 Disposal 21
Table of contents
Prevista Pure concealed cistern for floor-standing WC 8 cm 2

1 About these instructions for use
Trade mark rights exist for this document; for further information, go to
viega.com/legal.
1.1 Target groups
The information in this instruction manual is directed at the following
groups of people:
nHeating and sanitary professionals and trained personnel
nDrywall builder
Individuals without the abovementioned training or qualification are not
permitted to mount, install and, if required, maintain this product. This
restriction does not extend to possible operating instructions.
The installation of Viega products must take place in accordance with
the general rules of engineering and the Viega instructions for use.
1.2 Labelling of notes
Warning and advisory texts are set aside from the remainder of the text
and are labelled with the relevant pictographs.
DANGER!
This symbol warns of possible life-threatening injury.
WARNING!
This symbol warns of possible serious injury.
CAUTION!
This symbol warns of possible injury.
NOTICE!
This symbol warns of possible damage to property.
This symbol gives additional information and hints.
About these instructions for use
Prevista Pure concealed cistern for floor-standing WC 8 cm 3

1.3 About this translated version
This instruction for use contains important information about the choice
of product or system, assembly and commissioning as well as intended
use and, if required, maintenance measures. The information about the
products, their properties and application technology are based on the
current standards in Europe (e.g. EN) and/or in Germany
(e.g. DIN/DVGW).
Some passages in the text may refer to technical codes in Europe/
Germany. These should serve as recommendations in the absence of
corresponding national regulations. The relevant national laws, stand‐
ards, regulations, directives and other technical provisions take priority
over the German/European directives specified in this manual: The
information herein is not binding for other countries and regions; as said
above, they should be understood as a recommendation.
About these instructions for use
Prevista Pure concealed cistern for floor-standing WC 8 cm 4

2 Product information
2.1 Standards and regulations
The following standards and regulations apply to Germany / Europe and
are provided as a support feature.
Regulations from section: Fields of application
Scope / Notice Regulations applicable in Ger‐
many
Specifications for installations
inside buildings conveying water
for human consumption
EN 806-2
2.2 Intended use
2.2.1 Areas of use
The concealed cistern is suitable for mounting 8 cm floor-standing WCs
and for walling in or around. Flush actuation is possible from the front.
This model is equipped with dual flush technology and is delivered
without flush plates. For complete mounting, a WC flush plate for Pre‐
vista must be purchased additionally.
The cistern is designed to supply cold water. The application limits must
be taken into account for the cold water supply, see Ä „Regulations
from section: Fields of application“ on page 5.
Product information
Prevista Pure concealed cistern for floor-standing WC 8 cm 5

2.3 Product description
2.3.1 Overview

Fig. 1: Components
1 Concealed cistern
2 dowels and screws
3 Protective plug
4 Revision shaft cover for the cistern
5 Corner valve
2.3.2 Technical data
The product has the following technical data:
Small flush volume Factory setting approx. 3 l
setting range approx. 3–4 l
Large flush volume Factory setting approx. 6 l
setting range approx. 4.5–7.5 l
Flush volume
Product information
Prevista Pure concealed cistern for floor-standing WC 8 cm 6

Water pressure min. 15 kPa (0.15 bar)
Water pressure max. 1000 kPa (10 bar)
Installation depth max. 100 mm
Installation depth min. 80 mm
Water pressure
Installation depth
Product information
Prevista Pure concealed cistern for floor-standing WC 8 cm 7

3 Handling
3.1 Assembly information
3.1.1 Installation dimensions



Fig. 2: Dimensional drawing
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 8

3.2 Assembly
3.2.1 Mounting concealed cisterns
▶Push the wall mountings into the mounting brackets.
▶Adjust the construction height of the concealed cistern in accord‐
ance with the on-site marking of the upper edge of the finished
floor.
▶Mark the fixing points.
▶Drill the holes.
▶Insert the dowels.


Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 9

▶Align the concealed cistern.
▶Tighten the concealed cistern via the mounting brackets using a fork
spanner.
▷The concealed cistern is attached to the wall.
3.2.2 Connecting concealed cistern
▶Turn the cover plate lock 90° in anti-clockwise direction.
▶Remove the cover plate.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 10

▶Place the press connector onto the water supply.
▶Press the connection.
▶Seal the threaded connectors of the corner valve.
▶Screw the corner valve into the thread side of the connector.
▶Remove the plug.
▶Insert the corner valve into the cistern.
INFO! Observe the proper fit of the corner valve.
▶Remove the protective cap from the water supply hose.
▶Screw the water supply hose and the corner valve to each other.
▶Insert the cover plate into the cistern.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 11

▶Turn the cover plate lock by 90° in a clockwise direction.
▶Place the revision shaft on the cover plate.
To remove the revision shaft, press in the fixing clips at
the side.

Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 12

3.2.3 Setting up and bricking in the concealed cistern
▶Remove the flushing pipe polystyrene protection.
▶If necessary, shorten the drain.
▶Shorten the flushing pipe polystyrene protection.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 13

▶Grease the flushing pipe.
▶Insert the flushing pipe.
▶Check the seal is located.
▶Fasten the flushing pipe polystyrene protection.
▶Fit the protective plug of the flushing pipe.
▶Brick in the concealed cistern.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 14

NOTICE! Do not load the concealed cistern.
▶The wall construction must be at least 10 mm.
▶Tile the concealed cistern.
min. 10
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 15

3.2.4 Setting the flush volume
Requirements:
nThe cistern is freely accessible.
nThe water supply has been shut off.
nThe ceramic has been mounted.
▶Turn the cover plate lock 90° in anti-clockwise direction.
▶Remove the cover plate.
▶Push the clip backwards.
▶Remove the spacer through the revision opening.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 16

▶Fold the tab to the side.
▶Remove the overflow pipe through the revision opening.
▶Pull the drain valve upwards on the tab.
▶Lift the drain valve.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 17

▶Remove the drain valve through the revision opening.
▶Set the large flush volume at the drain valve.
▶Set the small flush volume at the drain valve.
▶Insert the drain valve.
83,784
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 18

▶Pull the drain valve downwards on the tab.
▶Insert the overflow pipe into the drain valve.
▶Fold the tab upwards.
▶Insert the spacer.
INFO! Insert the tip of the spacer into the drain valve.
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 19

▶The spacer can be heard locking into place.
▶Insert the cover plate into the cistern.
▶Turn the cover plate lock by 90° in a clockwise direction.
3.3 Cleaning and maintenance
The concealed cistern is constantly under mechanical, chemical, and
physical stress. For this reason, the components must be cleaned as
required, and the drain and filling valve seals renewed.
In areas or regions with hard water due to high concentration of calcium
or magnesium salts, there is the risk of limescale deposits developing
on the inlet and drain valves. The valves may have to be replaced,
depending on the extent of the deposits.
Cleaning and maintenance of the concealed cistern
Handling
Prevista Pure concealed cistern for floor-standing WC 8 cm 20