Bosch Gaz 6000 W User manual

6720866247 (2019/07) EG/TN/DZ/MA
Installation and maintenance instructions for the contractor
Wall mounted gas boiler
Gaz 6000 W
0 010 010 989-001
WBN 6000-24/28 /35 CR/HR N/L

Table of contents
Gaz 6000 W – 6720866247 (2019/07)
2
Table of contents
1 Explanation of symbols and safety instructions . . . . . . . . . . . 4
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 4
2 Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Product identification . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Overview of types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 Dimensions and minimum clearances . . . . . . . . . . . . . . 7
2.6 Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Regulations for gas systems. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Flue gas routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Approved flue accessories. . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Selecting the fan stage. . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.1 B22 horizontal flue gas routing . . . . . . . . . . . . . . . . . . . 12
4.3.2 B22 vertical flue gas routing . . . . . . . . . . . . . . . . . . . . . 12
4.3.3 C12, C42 horizontal flue gas routing with
concentric pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.4 C12, C42, C82 horizontal flue gas routing with
separate pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.5 C32 vertical flue gas routing with concentric pipe . . . . 14
4.3.6 C32, C52 vertical flue gas routing with separate
pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Solar preheated water (only WBN 6000-.. CR) . . . . . . 16
5.3 Fill and top-up water . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4 Checking the size of the expansion vessel . . . . . . . . . . 17
5.5 Installing the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.6 Filling the system and checking for tightness. . . . . . . . 18
6 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2 Connect the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.3 control device terminals . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.1 Connecting the on/off controller or OpenTherm
controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.2 Replacing the power cable. . . . . . . . . . . . . . . . . . . . . . . 21
6.3.3 Connecting a cylinder temperature sensor (WBN
6000-.. HR only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.4 Connecting an alarm contact. . . . . . . . . . . . . . . . . . . . . 21
7 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.1 Control panel overview . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2 Display readings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3 Switching on the appliance . . . . . . . . . . . . . . . . . . . . . . 22
7.4 Setting the flow temperature. . . . . . . . . . . . . . . . . . . . . 22
7.5 Setting the DHW heating . . . . . . . . . . . . . . . . . . . . . . . . 23
7.5.1 Adjust the domestic hot water temperature. . . . . . . . . 23
7.6 Setting the heating controls . . . . . . . . . . . . . . . . . . . . . 23
7.7 After commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.8 Setting summer mode . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.1 Switching off/standby mode. . . . . . . . . . . . . . . . . . . . . 24
8.2 Setting frost protection . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3 Anti-block protection. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9 Thermal disinfection (WBN 6000-.. HR only) . . . . . . . . . . . . 25
10 Heating pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.1 Changing the heating pump curve . . . . . . . . . . . . . . . . 25
11 Settings in the service menu . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11.1 Operating the service menu . . . . . . . . . . . . . . . . . . . . . 26
11.2 Service functions overview. . . . . . . . . . . . . . . . . . . . . . 27
11.2.1 Menu 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
11.2.2 Menu 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.2.3 Menu 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11.2.4 Restoring values to default setting . . . . . . . . . . . . . . . . 29
12 Check gas setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12.1 Gas type conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12.2 Gas setting (natural gas and LPG) . . . . . . . . . . . . . . . . 30
12.2.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12.2.2 Burner pressure adjustment . . . . . . . . . . . . . . . . . . . . . 31
13 Flue gas test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
13.1 Setting appliance output. . . . . . . . . . . . . . . . . . . . . . . . 32
13.2 Tightness test of the flue gas path . . . . . . . . . . . . . . . . 32
13.3 Checking the CO level in the flue gas . . . . . . . . . . . . . . 32
13.4 Testing flue gas loss value . . . . . . . . . . . . . . . . . . . . . . . 32
14 Environmental protection and disposal . . . . . . . . . . . . . . . . . 33
15 Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 34
15.1 Safety instructions for inspection and
maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
15.2 Description of various workflow steps . . . . . . . . . . . . . 35
15.2.1 Calling up the last fault saved . . . . . . . . . . . . . . . . . . . . 35
15.2.2 Opening the appliance . . . . . . . . . . . . . . . . . . . . . . . . . 35
15.2.3 Checking the strainer in the cold water pipe (WBN
6000-.. CR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
15.2.4 Clean burner body, nozzle and burner . . . . . . . . . . . . . 36
15.2.5 Cleaning the heat exchanger. . . . . . . . . . . . . . . . . . . . . 36
15.2.6 Checking the expansion vessel . . . . . . . . . . . . . . . . . . . 36
15.2.7 Setting the heating system operating pressure . . . . . . 36
15.2.8 Checking electrical wiring . . . . . . . . . . . . . . . . . . . . . . . 37
15.2.9 Removing the DHW temperature sensor . . . . . . . . . . . 37
15.2.10 Unblocking the pump (e.g. when commissioning
the system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
15.3 Checklist for inspection and maintenance . . . . . . . . . . 38
16 Readings on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
17 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
17.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
17.2 Faults that are shown on the display. . . . . . . . . . . . . . . 40
17.3 Faults that are not shown on the display . . . . . . . . . . . 41
18 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table of contents
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Gaz 6000 W – 6720866247 (2019/07)
18.1 Commissioning report for the device . . . . . . . . . . . . . .42
18.2 Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
18.3 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
18.4 Sensor values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
18.4.1 Flow temperature sensor . . . . . . . . . . . . . . . . . . . . . . . .47
18.4.2 DHW temperature sensor. . . . . . . . . . . . . . . . . . . . . . . .47
18.5 Setting values for central heating/DHW output . . . . . .48

Explanation of symbols and safety instructions
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4
1 Explanation of symbols and safety instructions
1.1 Explanation of symbols
Warnings
In warnings, signal words at the beginning of a warning are used to
indicate the type and seriousness of the ensuing risk if measures for
minimising danger are not taken.
The following signal words aredefined and can be used in this document:
DANGER:
DANGER indicates that severe or life-threatening personal injury will
occur.
WARNING:
WARNING indicates that severe to life-threatening personal injury may
occur.
CAUTION:
CAUTION indicates that minor to medium personal injury may occur.
NOTICE:
NOTICE indicates that material damage may occur.
Important information
The info symbol indicates important information where there is no risk to
people or property.
Additional symbols
Table 1
1.2 General safety instructions
HNotices for the target group
These installation instructions are intended for gas,
plumbing, heating and electrical contractors. All
instructions must be observed. Failure to comply with
instructions may result in material damage and
personal injury, including danger to life.
▶ Read the installation instructions (heat source,
heating controller, etc.) before installation.
▶ Observe the safety instructions and warnings.
▶ Follow national and regional regulations, technical
regulations and guidelines.
▶ Record all work carried out.
HDetermined use
The product may only be used in a domestic situation
for the heating of central heating water and for DHW
heating in closed-loop DHW and heating systems.
Any other use is considered inappropriate. Any
damage that may result from misuse is excluded from
liability.
HIf you smell gas
A gas leak could potentially cause an explosion. If you
smell gas, observe the following rules.
▶ Prevent flames or sparks:
– Do not smoke, do not use a lighter or strike
matches.
– Do not operate any electrical switches or unplug
any equipment.
– Do not use the telephone or ring doorbells.
▶ Turn off the gas supply at the main shut-off valve or
at the gas meter.
▶ Open windows and doors.
▶ Warn your neighbours and leave the building.
▶ Prevent anyone from entering the building.
▶ Move well away from the building: call the
emergency services and the gas supplier.
HDanger to life from poisoning by flue gas
There is a danger to life from escaping flue gas.
▶ Ensure that flues and gaskets are not damaged.
Symbol Meaning
▶ a step in an action sequence
a reference to a related part in the document
• a list entry
–a list entry (second level)

Explanation of symbols and safety instructions
5
Gaz 6000 W – 6720866247 (2019/07)
HDanger of death from poisoning by flue gas due
to inadequate combustion
Danger of death due to flue gas leak. If flues are
damaged or leaking, or if you smell flue gas, observe
the following rules.
▶ Close the fuel infeed.
▶ Open doors and windows.
▶ If necessary, warn all residents and leave the
building.
▶ Prevent third parties from entering the building.
▶ Rectify any damage to the flue gas pipe
immediately.
▶ Check the combustion air supply.
▶ Do not cover or reduce the size of ventilation
openings in doors, windows and walls.
▶ Ensure that there is adequate combustion air
supply, including for any appliances installed at a
later date, e.g. extractor fans, kitchen fans or air
conditioning units that discharge air to the outside.
▶ Never operate the device if there is insufficient
combustion air supply.
HInstallation, commissioning and maintenance
Installation, commissioning and maintenance may be
performed only by an approved contractor.
▶ In the case of open flue operation: ensure that the
installation location meets the ventilation
requirements.
▶ Do not repair, manipulate or deactivate safety-
relevant components.
▶ Only install original spare parts.
▶ Check for gas tightness after working on gas-
carrying components.
HElectrical work
Electrical work must only be carried out by electrical
installation contractors.
Before starting electrical work:
▶ Isolate all poles of the mains voltage and secure
against reconnection.
▶ Make sure the mains voltage is disconnected.
▶ Observe the wiring diagrams of other system
components as well.
HHandover to the user
When handing over, instruct the user how to operate
the heating system and inform the user about its
operating conditions.
▶ Explain how to operate the heating system and draw
the user's attention to any safety relevant action.
▶ In particular, point out the following:
– Alterations and repairs must only be carried out
by an approved contractor.
– Safe and environmentally compatible operation
requires inspection at least once a year and
responsive cleaning and maintenance.
▶ Point out the possible consequences (personal
injury, including danger to life or material damage)
of non-existent or improper inspection, cleaning
and maintenance.
▶ Leave the installation instructions and the
operating instructions with the user for
safekeeping.

Product Information
Gaz 6000 W – 6720866247 (2019/07)
6
2ProductInformation
2.1 Scope of delivery
Fig. 1
[1] Wall mounted gas boiler
[2] Fixing materials
[3] Set of printed documents for product documentation
2.2 Declaration of Conformity
The design and operation of this product comply with European
Directives and the supplementary national requirements. Conformity
has been demonstrated by the CE marking.
You can ask for a copy of the declaration of conformity for this product.
For this see the contact address on the back cover of these instructions.
2.3 Product identification
Data plate
The data plate includes the product performance information, approval
data and serial number. The data plate location can be found in the
product overview.
Additional type plate
The product name and the most important product data are shown on
the additional data plate. The additional type plate can be found on the
outside of the product in an easily accessible location.
2.4 Overview of types
WBN 6000-.. CR appliances are combi boilers for central and
instantaneous DHW heating.
WBN 6000-.. HR appliances are appliances for central heating and
DHW heating, fitted with a heating pump and 3-way valve for the
connection of an indirectly heated cylinder.
Table 2 Overview of types
1
3
2
0 010 010 990-001
Type Country Part No.
WBN 6000-24 CR N Egypt, Tunisia,
Algeria, Morocco
7 736 901 278
WBN 6000-28 CR N Egypt, Tunisia,
Algeria, Morocco
7 736 901 275
WBN 6000-28 HR N Egypt, Tunisia,
Algeria, Morocco
7 736 901 276
WBN 6000-35 CR N Tunisia 7 736 902 011
WBN 6000-35 HR N Tunisia 7 736 902 012

Product Information
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Gaz 6000 W – 6720866247 (2019/07)
2.5 Dimensions and minimum clearances
Fig. 2 Dimensions and minimum clearances (mm)
Table 3 Wall thickness S depending on the diameter of the flue
accessories
Table 4 Clearance A depending on the flue accessories for horizontal
flue pipe
≥100
700
200
150
≥ 100
B
0010011833-001
32
65
65 102
R1/2
60
30
R3/4
R1/2R3/4
R3/4
A
Ø100
Ø60
634 68
≥ 100
S
K
345
400 300
Wallthickness
S
K [mm] for Ø flue accessories [mm]
Ø 60/100 Ø80 Ø 80/125
15 - 24 cm 130 110 155
24 - 33 cm 135 115 160
33 - 42 cm 140 120 165
42 - 50 cm 145 145 170
Flue gas accessories A [mm]
Ø 60/100 mm
Connection elbow Ø 60/100 mm
95
Ø 60/100 mm
Connection adapter Ø 60/100 mm,
elbow 90° Ø 60/100 mm
185
Ø80mm
Connection adapter Ø 60/100 mm with
combustion air supply, elbow 90° Ø 80 mm
198
Ø 80/80 mm
Separate pipe connection Ø 80/80 mm,
elbow 90° Ø 80 mm
180
Ø 80/80 mm
Separate pipe connection Ø 80/80 mm,
vertical condensate drain Ø 80 mm,
elbow 90° Ø 80 mm
265

Product Information
Gaz 6000 W – 6720866247 (2019/07)
8
Table 5 Clearance B depending on the flue accessories for vertical flue
pipe
Flue gas accessories B [mm]
Ø 60/100 mm
Connection adapter Ø 60/100 mm
≥170
Ø 60/100 mm
Vertical condensate drain Ø 60/100 mm
≥220
Ø80mm
Connection adapter Ø 60/100 mm with
combustion air supply
≥200
Ø 80/80 mm
Separate pipe connection Ø 80/80 mm
≥210
Ø 80/80 mm
Separate pipe connection Ø 80/80 mm,
vertical condensate drain Ø 80 mm
≥290

Product Information
9
Gaz 6000 W – 6720866247 (2019/07)
2.6 Product overview
Fig. 3
[1] Expansion vessel
[2] Fan
[3] Combustion chamber
[4] Burner body with nozzle holder
[5] Ignition electrode
[6] Pressure relief valve (heating circuit)
[7] Automatic air vent
[8] Heating pump
[9] Pump speed switch
[10] Gas valve
[11] Pressure gauge
[12] Control device
[13] Filling device (WBN 6000-.. CR)
[14] Plate heat exchanger for Combi boilers (WBN 6000-.. CR)
[15] Data plate
[16] Pressure switch
[17] Flame sense electrode
[18] Flow temperature sensor
[19] Heat exchanger temperature limiter
[20] Air baffle
[21] Differential pressure switch
[22] Combustion air inlet
[23] Flue pipe
[24] Hot water temperature sensor
[25] Pressure relief valve (cold water) (WBN 6000-.. CR)
[26] Flow meter (turbine) (WBN 6000-.. CR)
0 010 005 932-001
1
2
3
4
14
15
16
17
19
20
21
22
23
5
6
7
8
9
10
11
12
18
13
25
24 26

Regulations for gas systems
Gaz 6000 W – 6720866247 (2019/07)
10
3 Regulations for gas systems
In order to ensure installation and operation of the product in
accordance with the regulations, please observe all the applicable
national and regional regulations as well as all technical rules and
guidelines.
The document 6720807972 contains information about the applicable
regulations. You can use the document search on our website to display
this. You will find the address of the website on the back of these
instructions.

Flue gas routing
11
Gaz 6000 W – 6720866247 (2019/07)
4Fluegasrouting
Before installing the heating appliance and flue gas routing, consult the
responsible building authorities and district flue gas inspector to
establish whether there are any objections.
The surface temperature at the combustion air pipe is below 85 °C for
concentric pipes. No minimum clearances to combustible building
materials are therefore required. Local regulations may differ from this
information and may stipulate minimum clearances to combustible
building materials.
The surface temperature of the flue pipe, using separate pipes less than
3 m in length, may exceed 85 °C. In such cases, insulate the flue pipe
against combustible construction materials by suitable means (e.g.
mineral wool).
4.1 Approved flue accessories
The flue accessories form part of the CE approval for the appliance. For
this reason, only the listed original flue accessories must be installed.
• Flue accessories, concentric pipe Ø 60/100 mm
• Flue accessories, single pipe Ø 80 mm
You will find the designations and part numbers for the components of
these original flue accessories in the main catalogue.
4.2 Installation instructions
CAUTION:
Due to the high efficiency of the appliance, the water vapour
contained in the flue gas may condense in the flue pipe.
▶ Install a condensate pipe, if required.
▶ In this case, install horizontal flue pipes with a downward slope to the
appliance of 5,2 % so that the condensate can run off in the direction
of the condensate pipe.
Table 6
• The flue gas routing must correspond to B22 for an open flue or C12,
C32, C42, C52 or C82 for balanced flue operation.
• The flue pipe is produced with Ø 60/100 mm concentric pipes or as
a separate pipe system with Ø 80 mm single pipes.
• If there is a separate pipe connection as per C52, the flue outlet and
combustion air inlet should not be installed at opposite sides of the
building.
• If there is a separate pipe connection as per C52, the clearance
between the flue outlet and combustion air inlet must be at least
500 mm.
CAUTION:
Low efficiency and functional problems if an incorrect fan stage is
used!
▶ Follow installation instructions for the flue accessories.
▶ Before installing the flue accessories:
Grease gaskets on the female connections with solvent-free grease
(e.g. petroleum jelly).
▶ If installing the flue/combustion air pipe, always push the flue
accessories as far as possible into the female connections.
Condensate pipe required for Flue length [m]
Flue gas routing with separate pipe (Ø 80) ≥5
Flue gas routing with concentric pipe
(Ø 60/100), horizontal
≥ 1.5
Flue gas routing with concentric pipe
(Ø 60/100), vertical
≥ 2

Flue gas routing
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12
4.3 Selecting the fan stage
The devices are matched to the flue length by setting the fan stages.
▶ Select the fan stage according to the type of flue gas routing,
appliance type and flue length (tab. 7 to 12).
▶ Set the fan stage with the service function 2.bd (chapter 11,
page 26).
4.3.1 B22 horizontal flue gas routing
NOTICE:
Poor combustion if restrictor is not installed.
▶IfB
22 flue gas routing is used and appliance output < 35 kW, install
restrictor (accessory 7 736 995 123).
▶IfB
22 vertical flue gas routing is used and appliance output = 35 kW,
install restrictor (accessory 7 736 900 818).
Fig. 4 B22 horizontal flue gas routing
The 90° elbow on the device is taken into account in the maximum
lengths.
• Each additional 90° elbow is equivalent to 2 m.
• Each additional 45° elbow is equivalent to 1 m.
Table 7 B22 horizontal flue gas routing
4.3.2 B22 vertical flue gas routing
Fig. 5 B22 vertical flue gas routing
NOTICE:
Poor combustion if restrictor is not installed.
▶IfB
22 flue gas routing is used and appliance output < 35 kW, install
restrictor (accessory 7 736 995 123).
▶IfB
22 vertical flue gas routing is used and appliance output = 35 kW,
install restrictor (accessory 7 736 900 818).
• Each additional 90° elbow is equivalent to 2 m.
• Each additional 45° elbow is equivalent to 1 m.
Table 8 B22 vertical flue gas routing
L [m] Fan stage
WBN 6000-24 ≤2 14
2–5 16
5–9 18
9 – 12 19
12 – 15 20
WBN 6000-28 ≤2 3
2–5 16
5–9 17
9 – 15 20
L
0 010 005 934-001
WBN 6000-35 ≤2 5
2–5 6
5–9 7
9 – 12 8
L [m] Fan stage
WBN 6000-24 ≤2 16
2–5 18
5–9 19
9 – 15 20
WBN 6000-28 ≤2 4
2–5 14
5–9 17
9 – 15 20
WBN 6000-35 ≤2 8
2–5 12
5–9 14
9 – 12 18
L [m] Fan stage
L
0 010 005 933-001

Flue gas routing
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Gaz 6000 W – 6720866247 (2019/07)
4.3.3 C12, C42 horizontal flue gas routing with concentric pipe
Fig. 6 C12 horizontal flue gas routing with concentric pipe
The 90° elbow on the device is taken into account in the maximum
lengths.
• Each additional 90° elbow is equivalent to 1 m.
• Each additional 45° elbow is equivalent to 0.5 m.
Table 9 C12, C42 horizontal flue gas routing with concentric pipe
4.3.4 C12, C42, C82 horizontal flue gas routing with separate pipe
Fig. 7 C12 horizontal flue gas routing with separate pipe
L1Combustion air pipe length
L2Flue length
The 90° elbow on the device is taken into account in the maximum
lengths.
• Each additional 90° elbow in the flue pipe is equivalent to 2 m.
• Each additional 45° elbow in the flue pipe is equivalent to 1 m.
• Each additional 90° elbow in the combustion air pipe is equivalent to
1m.
• Each additional 45° elbow in the combustion air pipe is equivalent to
0.5 m.
Table 10 C12, C42, C82 horizontal flue gas routing with separate pipe
L [m] Fan stage
Natural
Gas
LPG
WBN 6000-24 ≤0.5 1 14
0.5 – 2 2 16
2 – 3 3 18
3 – 4 4 19
WBN 6000-28 ≤0.5 1 1
0.5 – 2 2 2
2 – 3 3 3
3 – 4 4 4
WBN 6000-35 ≤0.5 1 1
0.5 – 2 2 2
2 – 3 3 3
3 – 4 4 4
L
0 010 005 935-001
L=L
1+ L2[m] L2[m] Fan stage
WBN 6000-24 ≤4 ≤2 6
4 – 10 2 – 5 10
10 – 18 5 – 9 14
18 – 24 9 – 12 15
24 – 30 12 – 15 17
WBN 6000-28 ≤4 ≤2 8
4 – 10 2 – 5 11
10 – 18 5 – 9 13
18 – 24 9 – 12 14
24 – 30 12 – 15 17
WBN 6000-35 ≤4 ≤2 11
4 – 10 2 – 5 14
10 – 18 5 – 9 17
18 – 25 9 – 12.5 18
L1
0 010 005 936-001
L2

Flue gas routing
Gaz 6000 W – 6720866247 (2019/07)
14
4.3.5 C32 vertical flue gas routing with concentric pipe
Fig. 8 C32 vertical flue gas routing with concentric pipe
• Each additional 90° elbow is equivalent to 1 m.
• Each additional 45° elbow is equivalent to 0.5 m.
Table 11 C32 vertical flue gas routing with concentric pipe
4.3.6 C32, C52 vertical flue gas routing with separate pipe
Fig. 9 C32 vertical flue gas routing with separate pipe
L1Combustion air pipe length
L2Flue length
L [m] Fan stage
WBN 6000-24 ≤1.5 6
1.5 – 2.5 9
2.5 – 5 11
5 – 8 18
WBN 6000-28 ≤1.5 7
1.5 – 2.5 13
2.5 – 5 14
5 – 8 20
WBN 6000-35 ≤1.5 1
1.5 – 2.5 2
2.5 – 5 3
5 – 7 18
L
0 010 005 937-001
L2
0 010 005 938-001
L1

Flue gas routing
15
Gaz 6000 W – 6720866247 (2019/07)
Fig. 10 C52 vertical flue gas routing with separate pipe
L1Combustion air pipe length
L2Flue length
• Each additional 90° elbow in the flue pipe is equivalent to 2 m.
• Each additional 45° elbow in the flue pipe is equivalent to 1 m.
• Each additional 90° elbow in the combustion air pipe is equivalent to
1m.
• Each additional 45° elbow in the combustion air pipe is equivalent to
0.5 m.
Table 12 C32, C52 vertical flue gas routing with separate pipe
L=L
1+L 2[m] L2[m] Fan stage
WBN 6000-24 ≤4 ≤2 5
4–10 2–5 9
10 – 18 5 – 9 13
18 – 24 9 – 12 16
24 – 30 12 – 15 18
WBN 6000-28 ≤4 ≤2 5
4–10 2–5 7
10 – 18 5 – 9 10
18 – 24 9 – 12 15
24 – 30 12 – 15 16
WBN 6000-35 ≤4 ≤2 7
4–10 2–5 8
10 – 18 5 – 9 14
18 – 25 9 – 12.5 20
L2
L1
0 010 005 939-001

Installation
Gaz 6000 W – 6720866247 (2019/07)
16
5 Installation
WARNING:
Risk of death from explosion!
Escaping gas can cause an explosion.
▶ Only allow a licensed contractor to carry out work on gas-carrying
components.
▶ Close the gas isolator before working on any gas-carrying
components.
▶ Replace used gaskets with new gaskets.
▶ After completing work on gas-carrying components, carry out a leak
test.
WARNING:
Risk to life through poisoning!
Escaping flue gas can cause poisoning.
▶ Check for leaks after working on flue gas routing components.
5.1 Prerequisites
▶ Prior to installation, obtain the approval of the gas supplier and the
flue gas inspector.
▶ Convert open heating systems to sealed systems.
▶ To prevent the formation of gas, do not use galvanised radiators or
pipes.
▶ In the case of LPG, install a pressure regulator with a pressure relief
valve.
Gravity circulation heating
▶ Connect the device to the existing piping system via a low loss header
with a dirt separator.
Underfloor heating systems
▶ Observe the permitted flow temperatures for underfloor heating
systems.
▶ When using plastic pipes, use diffusion-resistant piping or create
system separation by means of heat exchangers.
Surface temperature
The maximum surface temperature of the appliance is below 85 °C.
Therefore no special safety measures are required to protect flammable
materials and fitted furniture. Country-specific regulations must be
observed.
5.2 Solar preheated water (only WBN 6000-.. CR)
WARNING:
Risk of scalding from hot water!
DHW temperatures over 60 °C can arise during solar operation and this
can cause scalding.
▶ Use a thermostatic DHW mixer from the Solar set (accessories) to
limit the temperature to 60 °C!
CAUTION:
Risk of system damage through excessively high temperatures!
Excessive temperatures due to solar preheated water can damage the
device.
▶ Use a thermostatic DHW mixer from the Solar set (accessories) to
limit the temperature to 60 °C!
▶ If solar preheated water is used, activate the burner start delay
(service function 2.bf, chapter 11).
5.3 Fill and top-up water
Fill and top-up water for the heating system
Unsuitable fill and top-up water in the heating system can result in the
heat exchanger scaling up and failing prematurely.
Table 13
For straightforward water treatment:
▶ Use the system approved by us.
Antifreeze
The following antifreeze fluids and concentrations are approved:
Table 14
Heating water additives
Table 15 Permissible corrosion inhibitors
Sealant
In our experience, the addition of sealants to the heating water can cause
problems (deposits in the heat exchanger). We therefore advise against
their use.
Hardness range Water treatment
soft (≤ 8.4 °dH) not required
medium (8.4 - 14 °dH) recommended
hard (≥ 14 °dH) required
Designation Concentration
Varidos FSK 22 - 55 %
Alphi - 11 25 - 40 %
Glythermin NF 20 - 62 %
Antifrogen N 20 - 40 %
Corrosion inhibitor Concentration
Nalco 77381 1 - 2 %
Sentinel X 100 1,1 %
Fernox Protector F1 As specified by the manufacturer

Installation
17
Gaz 6000 W – 6720866247 (2019/07)
5.4 Checking the size of the expansion vessel
The following graph permits the approximate estimation of whether the
installed expansion vessel is sufficient or whether an additional
expansion vessel is required (not for underfloor heating system).
The following key data was taken into account for the curves shown:
• 1 % Water seal in the expansion vessel or 20 % of the rated volume in
the expansion vessel
• Operating pressure differential for thepressure relief valve of 0.5 bar
• Pre-charge pressure of the expansion vessel corresponds to the
static system head above the wall mounted boiler.
• Maximum operating pressure: 3 bar
Fig. 11 Curves of the expansion vessel 6 l (appliance output < 35 kW)
Fig. 12 Curves of the expansion vessel 8 l (appliance output =35 kW)
Legend to fig. 11 and 12:
1 Pre-charge pressure 0.5 bar (default setting)
2 Pre-charge pressure 0.75 bar
3 Pre-charge pressure 1.0 bar
4 Pre-charge pressure 1.2 bar
5 Pre-charge pressure 1.3 bar
T Supply temperature
V System content in litres
A Operating capacity of the expansion vessel
B Additional expansion vessel required
▶ If results are borderline: determine precise vessel size.
▶ If the intersection is on the right beside the curve: install an additional
expansion vessel.
5.5 Installing the device
Making drill holes and the wall opening
▶ Secure the mounting template supplied with the printed documents
to the wall; when doing so, observe the minimum side clearances of
100 mm ( page 7).
▶ Drill the holes for the screw hooks according to the mounting
template.
▶ If required: create wall opening for flue accessories.
Fig. 13 Mounting template
▶ Remove mounting template.
Hanging the appliance
▶ Remove packaging, observing all notes on the packaging.
▶ On the data plate, check the designation of the target country and
suitability for the gas type supplied by the local gas supplier.
1. Fit rawl plug.
2. Fit screw hooks.
3. Position the appliance on the wall and mount it on the screw hooks.
Fig. 14 Mounting the appliance on the screw hooks
0010016552-003
A
B
4
5
321
30
40
50
60
70
80
90
0100 200 300 400 500 600 700
T[°C]
V[l]
0010016554-002
A
B
4
5
321
30
40
50
60
70
80
90
0 100 200 300 400 500 600 700
T[°C]
V[l]
S8x 60mm. S8 x 60mm.
134
1
75
5
+1
0
60
200
8
160
1
5
+1
0
110
35
75
264
1
30
345
1
160 mm.
8
0 010 005 944-001
0 001 005 947-001
1.
2.
3.

Installation
Gaz 6000 W – 6720866247 (2019/07)
18
Flipping down the control device
The casing is secured with two screws against unauthorised removal
(electrical safety).
▶ Always secure the casing with these screws.
1. Undo screws.
2. Pull the control device down.
3. Flip the control device down.
Fig. 15 Flipping down the control device
Installing pipework
DANGER:
Contaminated heating water can damage the device!
Residues in the pipework can damage the device.
▶ Flush the pipework before installing the device.
▶ Determine the internal diameter for the gas supply.
▶ All pipe connections in the heating system must withstand a pressure
of 3 bar, and they must be suitable for 10 bar in the DHW circuit.
▶ Service valves1) and install the gas isolator1).
▶ For draining and filling the system on site, install a drain & fill valve at
the lowest possible point in the system.
▶ Create a drain line for the pressure relief valve from corrosion-
resistant materials.
▶ Always route hoses with a slope.
5.6 Filling the system and checking for tightness
NOTICE:
Commissioning without water damages the appliance!
▶ Operate this device only when filled with water.
Fig. 16 Connections on the gas and water side (accessories)
[1] Heating flow cock2)
[2] WBN 6000-.. HR appliances: Cylinder flow,
WBN 6000-.. CR appliances: DHW
[3] Gas isolator2)
[4] WBN 6000-.. HR appliances: Cylinder return,
WBN 6000-.. CR appliances: Cold water tap2)
[5] Heating return valve2)
[6] Hose from the pressure relief valve (heating circuit)
[7] WBN 6000-.. CR appliances: Filling facility
Filling and venting the DHW circuit
▶ WBN 6000-.. CR appliances: Open cold water valve [4] and one DHW
tap until water flows out.
▶ WBN 6000-.. HRAppliances with a DHW cylinder: turn on the external
cold water tap and then turn on a hot water tap until water runs out.
▶ Check all joints for tightness (test pressure: max. 10 bar).
Filling and venting the heating circuit
▶ Set the pre-charge pressure of the expansion vessel to the static head
of the heating system (page 17).
▶ Open radiator valves.
▶ Open the heating flow [1] and return valves [5].
▶ Fill the heating system to 1 to 2 bar through the drain and fill valve
[7], and then close the drain and fill valve.
▶Bleedradiators.
▶ Open the automatic air vent valve (leave open).
▶ Refill the heating system to 1 to 2 bar and then close the fill and drain
valve again.
▶ Check the joints for leaks (test pressure: max. 2.5 bar at the pressure
gauge).
1) Accessories
0 010 010 991-001
1. 1.
2.
2.
3.
3.
2.
3.
2) ACCESSORIES
0 010 005 952-001
4 5
6
7
2
3
1

Installation
19
Gaz 6000 W – 6720866247 (2019/07)
Checking the gas line for tightness
▶ Close the gas isolator to protect the gas valve against damage from
excess pressure.
▶ Check all joints for tightness (test pressure: max. 150 mbar).
▶ Depressurise the system.

Electrical connection
Gaz 6000 W – 6720866247 (2019/07)
20
6 Electrical connection
6.1 General notes
WARNING:
Risk to life from electric shock!
Touching live electrical parts can cause an electric shock.
▶ Before working on electrical parts, disconnect all phases of the
power supply (fuse/circuit breaker) and lock the isolator switch to
prevent unintentional reconnection.
▶ Safety measures according to national and international regulations.
▶ In rooms with a bath or a shower, connect the device to a circuit
breaker.
▶ Do not connect any additional consumers to the device power supply.
Fuses
The device is protected by two fuses. They are located on the circuit
board.
Replacement fuses are located on the cover of the control device.
6.2 Connect the device
Fig. 17 Protection zones
[1] Safety zone 1, directly above the bath
[2] Safety zone 2, within a radius of 60 cm from the bath/shower
If the cable is not long enough:
▶ Remove the main power cord and replace it with a suitable one
(Table 16).
Connection outside safety zones 1 and 2:
▶ Attach a suitable mains plug to the mains cable.
▶ Insert plug into a grounded electrical socket.
-or-
▶ Securely connect the power cable to a manifold.
Connection inside safety zones 1 and 2:
▶ Remove the main power cord and replace it with a suitable cable
(Table 16).
▶ Connect the main power cord in such a way that the ground
conductor is longer than the other conductors.
▶ Make the electrical connection via an isolator that disconnects all
phases with at least 3 mm contact separation (e.g. fuses, circuit
breakers).
▶ In safety zone 1: Route main power cord vertically upward.
The following cables are suitable as replacement for the built-in main
power cord:
Table 16 Suitable main power cord
Connecting area Suitable cable
Inside safety zones 1 and 2 NYM-I 3 × 1.5 mm2
Outside safety zones 1 and 2 HO5VV-F 3 × 1.0 mm2
HO5VV-F3×0.75mm
2
225 cm
6 720 612 659-13.3TT
22 11
60 cm
60 cm