BWT Rondomat Duo 6 User manual

1-511068 / 13065 / 2021-09 / © BWT Wassertechnik GmbH / Printed in Germany
Installation and operating manual EN
Rondomat Duo 6,10
Insulation retrotting set
Subject to change!

32
2
Thank you very much for the condence that
you have shown in us by purchasing a BWT
device.
This manual applies only to the product(s) specied on the title page.
Publication details
BWT Holding GmbH
Walter-Simmer-Strasse 4
5310 Mondsee, Austria
Phone: +43 / 6232 / 5011 0
E-Mail: o󰀩[email protected]
BWT Wassertechnik GmbH
Industriestrasse 7
69198 Schriesheim, Germany
Phone: +49 / 6203 / 73 0
E-Mail: [email protected]
www.bwt.com
This manual was created, reviewed and approved in German. If there are any discrepancies
between the German edition of the manual and editions in other languages, the information in the
German document should be given preference.
In the event of inconsistencies, contact our customer service;
see chapter “7.2 Your contact at BWT”
on page 25 .
All rights reserved (including for the translation). This manual or parts of it are not permitted to be
reproduced, translated or reused in any other way without the written permission of the manufacturer.
In general, the company and product names specied in this manual are registered trademarks of
their respective companies.
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EN

32
EN
Table of contents
1 Safety instructions . . . . . . . . 4
1.1 General safety instructions . . . . . . . 4
1.2 Validity of this documentation . . . . . . 4
1.3 Personnel qualications . . . . . . . . . 4
1.4 Transport and installation . . . . . . . . 4
1.5 Symbols used . . . . . . . . . . . . . . 4
1.6 How safety instructions are displayed . . 5
1.7 Product-specic safety instructions . . . 5
2 Scope of delivery . . . . . . . . . 6
3 Intended use . . . . . . . . . . . 10
3.1 Proper use . . . . . . . . . . . . . . . 10
3.2 Foreseeable misuse . . . . . . . . . . 10
4 Function . . . . . . . . . . . . . 10
5 Installation . . . . . . . . . . . . 11
5.1 Required tools . . . . . . . . . . . . . 11
5.2 Close the connection tting . . . . . . 11
5.3 Change the softening columns . . . . 11
5.4 Disconnect the system from the mains
voltage . . . . . . . . . . . . . . . . . 12
5.5 Remove the plastic cover from the
control valve . . . . . . . . . . . . . . 12
5.6 Conversion work on the hydraulics . . 13
5.6.1 Conversion work on the solenoid valve
housing . . . . . . . . . . . . . . . . . . . . 13
5.6.2 Conversion work on the waste water
connection . . . . . . . . . . . . . . . . . . 14
5.6.3 Conversion work on the reinforced hoses . . 15
5.7 Checking the unit for leaks . . . . . . 15
5.8 Conversion work on the electrolysis
housing and control unit . . . . . . . . 16
5.9 Conversion work on the solenoid
valve cable set . . . . . . . . . . . . . 18
5.10 Conversion work on the water meter
cable set . . . . . . . . . . . . . . . . 19
5.11 Aligning the unit . . . . . . . . . . . . 20
5.12 Fitting the insulation . . . . . . . . . . 20
5.12.1 Mounting the insulation on the softening
columns. . . . . . . . . . . . . . . . . . . . 20
5.12.2 Fitting the insulation on the control valve. . . 21
5.12.3 Fitting the insulation on the reinforced
hoses . . . . . . . . . . . . . . . . . . . . . 21
5.13 Preparing for operation . . . . . . . . 22
5.13.1 Routing hydraulic lines . . . . . . . . . . . . 22
5.13.2 Routing electrical cables . . . . . . . . . . . 23
5.14 Establishing the power supply and
water supply . . . . . . . . . . . . . . 24
5.15 Checking for leaks . . . . . . . . . . . 24
5.16 Final operations . . . . . . . . . . . . 24
6 Spare parts . . . . . . . . . . . 24
7 Warranty . . . . . . . . . . . . . 25
7.1 Product returns . . . . . . . . . . . . 25
7.2 Your contact at BWT . . . . . . . . . . 25
8 Disposal . . . . . . . . . . . . . 25
8.1 Disposal of the transport packaging . . 25
8.2 Disposal of the insulation . . . . . . . 25
9 Technical data . . . . . . . . . . 26
10 Appendix. . . . . . . . . . . . . 27
10.1 Terminal diagram . . . . . . . . . . . 27

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1 Safety instructions
1.1 General safety instructions
The product was manufactured in accordance with
all recognised regulations and technical standards
and was in compliance with the relevant legal re-
quirements when it was put into circulation.
Nevertheless, there is still a risk of damage to per-
sons or property if you do not follow this chapter
and the safety instructions in this documentation.
● Read this documentation carefully and in its en-
tirety before working with the product.
● Always hand over the product to third parties to-
gether with the full documentation.
● Follow all of the instructions in relation to the
proper handling of the product.
● If you detect damage on the product, contact the
BWT after-sales service.
●Use only accessories, spare parts and con-
sumable materials that have been approved by
BWT.
● Use your personal protective equipment. It en-
sures your safety and protects you from injury.
● Perform only tasks that are described in these
instructions or that you have been trained to do
by BWT.
● Perform all tasks in compliance with all applica-
ble standards and provisions.
● Instruct the operator in the function of the
product.
● Instruct the operator in the maintenance of the
product.
1.2 Validity of this documentation
This documentation is intended for installers without
training from BWT, installers with training from BWT
(e.g. drinking water specialists), and BWT service
technicians.
This documentation contains important informa-
tion for mounting the product safely and properly.
Read this documentation in full before working with
the product. Pay particular attention to the “Safety
Instructions” chapter.
1.3 Personnel qualications
The installation work described in these instructions
requires basic knowledge of mechanics, hydraulics
and electrical systems, as well as knowledge of the
corresponding specialist terms.
To ensure that the device is installed safely, this work
must be performed only by a qualied specialist or
a trained person under the guidance of a qualied
specialist.
A qualied specialist is someone with specialist
training, knowledge and experience as well as
knowledge of the applicable regulations allowing
them to assess the work assigned to them, identify
potential risks, and take suitable safety measures.
Specialists must comply with applicable, industry-
specic regulations.
A trained person is someone who has been
instructed by a qualied specialist in the tasks
entrusted to them and the potential dangers of
improper conduct and, if necessary, trained and
instructed on the necessary protective equipment
and protective measures.
1.4 Transport and installation
To avoid damage during transport to the installation
location, do not remove the BWT product from the
packaging until you have reached the relevant loca-
tion. Then dispose of the packaging in the correct
manner. Check that the delivery is complete.
1.5 Symbols used
This symbol indicates risks due to
the mains voltage.
Risk of death by electric shock!
This symbol indicates information
that must be followed.
Unplug device before any service
and repair work.

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This symbol indicates that this
product must not be disposed of
in household waste at the end of
its service life.
This symbol indicates that the
product can be recycled after it is
shut down.
1.6 How safety instructions are
displayed
In this document safety instructions precede any
sequence of actions that could cause harm to per-
sons or damage to property. All hazard prevention
measures must be followed.
Safety instructions are displayed as follows:
SIGNAL WORD!
Source of hazard (e.g. electric
shock)
Type of hazard (e.g. risk of fatal
injury)!
►Escape or prevent the hazard
►Rescue measure (optional)
Signal word / colour Indicates the severity
of the hazard
Warning symbol Calls attention to the
hazard
Source / type of
hazard
Indicates the type
and the source of the
hazard
Consequences of
hazard
Explains the con-
sequences of not
following the safety
instructions
Hazard prevention
measure
Explains how to
avoid the hazard
Signal word Colour Severity of the hazard
DANGER
High-risk hazard.
Indicates a hazardous
situation which, if not
avoided, will result in
death or serious injury.
WARNING
Hazard with a moder-
ate degree of risk.
Indicates a hazardous
situation which, if not
avoided, could result in
death or serious injury.
CAUTION
Low-risk hazard.
Indicates a hazardous
situation which, if not
avoided, may result
in minor or moderate
injury.
1.7 Product-specic safety
instructions
DANGER!
Mains voltage!
Risk of death by electric shock!
►Unplug device before any service and
repair work.
►If the mains cable of the unit becomes
damaged, you must replace it with an
original BWT cable.
In the following sections, you will nd product-spe-
cic safety instructions whenever you must perform
certain safety-relevant actions on the device.

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EN
2 Scope of delivery
Insulation retrotting set ─ Rondomat Duo 6 IXT:
Position Designation Quantity
1Cover for Rondomat Duo, size 2, EPP 1
2.1 Additional cover (insulation set for control valve, size 2) 1
2.2 Inner half-shell (insulation set for control valve, size 2) 1
2.3 Outer half-shell (insulation set for control valve, size 2) 1
3Insulation set for reinforced hose, size 2 1
4Insulation set for IXT 1652 softening columns 1
Insulation retrotting set, size 2 1
Insulation retrotting set ─ Rondomat Duo 6 BWC:
Position Designation Quantity
1Cover for Rondomat Duo, size 2 1
2.1 Additional cover (insulation set for control valve, size 2) 1
2.2 Inner half-shell (insulation set for control valve, size 2) 1
2.3 Outer half-shell (insulation set for control valve, size 2) 1
3Insulation set for reinforced hose, size 2 1
4Insulation set for BWC 1649 softening columns 1
Insulation retrotting set, size 2 1
Insulation retrotting set ─ Rondomat Duo 10:
Position Designation Quantity
1Cover for Rondomat Duo, size 2 1
2.1 Additional cover (insulation set for control valve, size 2) 1
2.2 Inner half-shell (insulation set for control valve, size 2) 1
2.3 Outer half-shell (insulation set for control valve, size 2) 1
3Insulation set for reinforced hose, size 2 1
4Insulation set for 2136 HOCH softening columns 1
Insulation retrotting set, size 2 1

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EN
1
2.3
3
4
2.2
2.1
Schematic diagram

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Insulation retrotting set, size 2
Position Designation Quantity
5Solenoid valve housing, 170 x 80 x 65 1
6.1 Mounting bracket for Rondomat Duo insulation retrotting set 1
6.2 Cylinder head screw, M 6 x 10 2
6.3 Washer, A 6.4 2
7Holder for mounting bracket, size 2 1
7.1 Cylinder head screw, M 4 x 10 4
7.2 Washer, A 4.3 4
8.1 Bracket, 132 x 40 2
9Waste water quick-release connection M 1
9.1 O-ring, EP 70, 20 x 2 1
9.2 O-ring, 19 x 1.5 1
9.3 Quick-release waste water connection, 0-degree angle 1
9.4 Clip, 23 x 3 1
10.1 O-ring, 18 x 2.2 4
10.2 O-ring, 14 x 1.6 1
11.1 Flexible hose, DN 50 2
11.2 O-ring, 56 x 3.55 4
Connection cable, solenoid valve, retrotting, Rondomat Duo,
size 2
1
Extension cable, water meter, retrotting, Rondomat Duo, size 2 1
Wago two-way connector, 221 – 2411 2
Cable tie, 204 x 3.6 10
Installation and operating manual for Rondomat Duo 6, 10 insula-
tion retrotting set
1

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6.2 6.1 57 8.1
9
7.2 11.1 9.3
10.2
10.1
9.4
7.1
9.1
9.2
11.2
6.3
Schematic diagram

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EN
3 Intended use
3.1 Proper use
The product is used for retroactive insulation of
Rondomat Duo-type water softeners.
3.2 Foreseeable misuse
Any use of the product outside of the intended scope
of application.
4 Function
In the event of stagnation, the product delays the
adjustment of the water temperature in the unit to the
ambient temperature. Depending on the type of unit,
the temperature takes around 5 to 10 hours longer
to adjust with insulation than without the insulation.
On average, this is a doubling of the adjustment
period for the water temperature.
The insulation moves the range from which con-
densation is formed on particularly metallic unit
components.
Range for the formation of condensation
(example)
Ambient
temperature
Relative
humidity
Unit without
insulation
15°C 60%
Unit with
insulation
32°C 60%
When exposed to indirect sunlight (in a shaded
area), it is weather resistant (UV-resistant).
The product is made from EPP (expanded polypro-
pylene). The material is HBCD-free and fulls the
following requirements:
● Fire protection requirements in accordance with
EN 13501-1, E.
● Codes of practice for drinking water installations
in accordance with DIN 1988-200:2012-05, sec-
tion 14.2.6 (on insulation and sheathing of cold
drinking water pipes).

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5 Installation
5.1 Required tools
The following tools are required to t the insulation:
● Slotted screwdriver (6.5 mm; 4.0 mm)
● Phillips screwdriver (PH1, PH2)
● Electrician’s screwdriver
● TORX T20 screwdriver
● Allen key (sizes 3, 5 and 6)
● Ring spanner (size 8)
● Diagonal pliers
●Needle-nose pliers
Label all the assembly screws,
washers and nuts to be disas-
sembled for the retrot accord-
ingly and store them for reuse.
Schematic diagram
5.2 Close the connection tting
►Turn the hand-wheel on the connection tting
clockwise down to the lower stop (arrow marking
on the hand-wheel: “Z” is for closed).
9The water supply line for the product is closed
and the connecting tting is in “Bypass” operat-
ing mode.
►Provide a container for collecting residual water.
5.3 Change the softening columns
DThe unit is depressurised.
►Proceed as follows to change the softening
columns:
1. Press the menu button.
2. Use the arrows to select the hand in the
menu display.
3. Press the OK button to conrm your selec-
tion.

1312
EN
4. Use the arrows to select the option for switch-
ing the softening columns.
5. Press the OK button to conrm your selec-
tion.
6. Press the menu button to exit the menu.
Changing the softening columns takes about one
minute.
5.4 Disconnect the system from the
mains voltage
DYou have replaced the softening columns.
DANGER!
High voltage!
Risk of death by electric shock!
►Disconnect the power supply to the
system before all maintenance and
repair work.
►There may still be voltage from external
connections even when the mains volt-
age is disconnected.
►Discharge live components through
earthing.
►Disconnect the mains plug.
Schematic diagram
5.5 Remove the plastic cover from the
control valve
►Remove the plastic cover from the control valve.

1312
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12
12.1 13
Schematic diagram
5.6 Conversion work on the
hydraulics
DThe unit is disconnected from the power
supply.
DThe unit is depressurised.
5.6.1 Conversion work on the solenoid valve
housing
1. Unscrew the two screws (12.1) from the ac-
cess ap (12) for the control unit.
2. Open the access ap (12) for the control unit.
3. Release all the cable glands and cable sets
on the control unit and carefully remove them
from the control unit.
4. Unscrew the screws on the intermediate
frame (12.2) for the control unit and remove
the intermediate frame.
13.1 13.2
13.3
13
13.4
Schematic diagram
5. Open the old solenoid valve housing (13).
6. Remove the cable lugs from the solenoid
valves (13.1) and the electrolysis cell (13.2).
7. Unscrew the lock nut (13.3) for the cable
gland on the old solenoid valve housing (13).
8. Pull the old solenoid valve cable set out of the
solenoid valve housing.
9. Remove two screws (13.4) from the old sole-
noid valve housing.
10. Replace the old solenoid valve housing with
the new solenoid valve housing and secure
it with the two screws removed previously.
Leave the solenoid valve housing open for
the next step.
12.2

1514
EN
14
10.3
10
Schematic diagram
5.6.2 Conversion work on the waste water
connection
1. Disconnect the brine hose from the angled t-
ting (14) on the degassing tank.
2. Disconnect the old waste water ushing hose
from the hose nozzle (16).
3. Unscrew the two screws (10.3) on the regen-
eration block (10).
16
Schematic diagram
9 15
10.4
10
Schematic diagram
4. Unscrew the screw (10.4) on the regenera-
tion block (10).
5. Remove the regeneration block (10) from the
control valve (15).
6. Replace the hose nozzle with the waste water
connection (9). Use the included 20x2 O-ring.
7. Replace the four 18x2.2 O-rings and one
14x1.6 O-ring on the regeneration block (10)
and reconnect the regeneration block to the
control valve (15).
8. Fasten the screws on the regeneration block
(10.3) and (10.4).
9.39.5
9.6
Schematic diagram
Do not connect the waste water
ushing hose to the waste water
connection (9) until the insulation
is installed.
9. Connect the old 60 mm hose (9.5) to the
quick-release connection (9.3).
10. Secure all the connection points for the waste
water ushing hose using hose clamps (9.6).

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EN
8
20
8.2
11
Schematic diagram
7
8.1
11.1
Schematic diagram
5.6.3 Conversion work on the reinforced
hoses
1. Unscrew the screws for the two old brackets
(8) on the connection adapter (20).
2. Unscrew the screws for the two old brackets
(8.2) on the control valve.
3. Replace the two old reinforced hoses (11)
with the two new reinforced hoses. Use the
included 56x3.55 O-rings.
4. Fasten the old brackets (8.2) to the control
valve using the same screws.
5. Replace the two old brackets on the con-
nection adapter with the new brackets (8.1)
and fasten the new clamps using the same
screws.
For now, only slightly tighten the
screws on the new brackets. It
must still be possible to move
the brackets.
6. Screw the new holder (7) for the mounting
bracket in place with the new brackets (8.1)
using the four included M4x10 screws and
washers. Note the installation direction.
7. Tighten the screws on the brackets (8.1) and
(8.2).
Schematic diagram
5.7 Checking the unit for leaks
DThe unit is disconnected from the power
supply.
WARNING!
Risk of injury!
Severe injuries due to slipping on damp
surfaces.
►Immediately remove any escaping water.
Do not connect damaged or incomplete
units to the power and water supply
system.
►Open the connection tting and apply water pres-
sure to the unit.
►Check the unit for leaks.
►Close the connection tting again.

1716
EN
6.4
6
6.5
Schematic diagram
5.8 Conversion work on the electroly-
sis housing and control unit
DThe unit is disconnected from the power
supply.
DThe unit is depressurised.
1. Open the electrolysis housing (6.5).
2. Unscrew the four screws (6.4) on the electrol-
ysis housing (6.5) and remove the electroly-
sis housing from the mounting bracket (6).
6.3
17
6
Schematic diagram
3. Unscrew the three hex nuts (6.3) on the back
of the old mounting bracket (6).
4. Remove the entire control unit (17) from the
mounting bracket (6).
18.1
18
6
Schematic diagram
5. Unscrew the four screws (18.1) from the front
of the old mounting bracket (6) and remove
the mains transformer (18).
19.119
Schematic diagram
6. Unscrew the two screws (19.1) for fastening
the old mounting bracket on the membrane
cover of the control valve (19).
7. Remove the old mounting bracket.
8. Reattach the membrane cover of the control
valve using the two screws (19.1).

1716
EN
6.1 6.2
7
Schematic diagram
9. Mount the new mounting bracket (6.1) on the
new holder (7) using the two included screws
(6.2) and two washers. Note the installation
direction.
6.1
18
6.4
Schematic diagram
10. Screw the mains transformer (18) onto the
new mounting bracket (6.1) using the screws
and nuts removed previously.
11. Pull one cable tie through each lug (6.4) in
the new mounting bracket. The cable ties
x the electrical cables onto the back of the
mounting bracket in a later step.
17
Schematic diagram
12. Screw the control unit (17) onto the new
mounting bracket using the screws and nuts
removed previously. Leave the control unit
open for the next step.

1918
EN
6.5
7
Schematic diagram
13. Mount the electrolysis housing (6.5) onto the
new holder (7). Leave the electrolysis hous-
ing open for the next step.
6.6
Schematic diagram
6.7
Schematic diagram
5.9 Conversion work on the solenoid
valve cable set
DThe unit is disconnected from the power
supply.
DThe unit is depressurised.
1. In the electrolysis housing, loosen the termi-
nals for the solenoid valve cable set.
2. Loosen the cable glands (6.6) for the sole-
noid valve cable set and carefully pull it out of
the electrolysis housing.
3. Insert the new solenoid valve cable set
through the cable gland on the electrolysis
housing.
4. Connect the new solenoid valve cable set ac-
cording to the terminal diagram printed on the
board.
The board can be removed for
easier installation.
5. Fasten the cable gland (6.6) for the solenoid
valve cable set.
6. Close the electrolysis housing with the cover
(6.7) and four screws.

1918
EN
13.5
Schematic diagram
7. Insert the new solenoid valve cable set into
the new solenoid valve housing through the
round opening (13.5).
8. Tighten the lock nut (13.5) for the cable gland
on the new solenoid valve housing.
9. Connect the new solenoid valve cable set ac-
cording to the terminal diagram (see chapter
“10 Appendix”, page 27).
10. Fasten the cable gland for the solenoid valve
cable set.
13.6
Schematic diagram
11. Close the new solenoid valve housing with
the cover and four screws (13.6).
6.5
Schematic diagram
5.10 Conversion work on the water
meter cable set
DThe unit is disconnected from the power
supply.
DThe unit is depressurised.
1. Guide the water meter cable set extension
through the cable gland (6.5) on the control unit
and connect it according to the terminal dia-
gram (see chapter “10 Appendix”, page 27).
Connect the water meter cable set to the wa-
ter meter cable set extension using the ter-
minal clip.
2. Connect the remaining cables in accord-
ance with the terminal diagram (see chapter
“10 Appendix”, page 27).
12
12.1
12.2
Schematic diagram
3. Mount the intermediate frame (12.2) on the
control unit and tighten the screws for the in-
termediate frame.
4. Close the access ap (12) on the control unit
and fasten it with the two screws removed
previously (12.1).

2120
EN
Schematic diagram
5.11 Aligning the unit
Ensure that the unit is aligned
horizontally and that the surface
is level.
►Align the unit and avoid bending the reinforced
hoses under all circumstances.
1
4
21
Schematic diagram
5.12 Fitting the insulation
DConversion work on the hydraulics is
complete.
5.12.1 Mounting the insulation on the
softening columns
►Fit the insulation on the two softening columns.
The insulation for a softening column consists of
two symmetrical half-shells.
1. Place the open half-shells (4) around the sof-
tening column (21) vertically and align them
so that they are parallel to each other.
4.1
21
Schematic diagram
2. Connect the top snap-closure points (4.1) on
both sides with each other. To do so, you can
rotate the half-shells around the softening
columns (21).
3. Turn the rst snap-closure edge towards you
and connect the half-shells to each other
from top to bottom by pressing the half-shells
together with a tapping movement near the
snap-closure edge.
4. Turn the second snap-closure edge towards
you and connect the half-shells to each other
from top to bottom by pressing the half-shells
together with a tapping movement near the
snap-closure edge.
5. Align the insulation on the softening column
with the BWT logo to the front.