Wolf CGB-11 User manual

Installation instructions
Gas red condensing boilers
CGB-11 Boiler
CGB-20 Boiler
CGB-K-20 Combi boiler
CGB-24 Boiler
CGB-K-24 Combi boiler
Art.-Nr. 3061344_201509 Subject to technical modications GB
Wolf GmbH · Postfach 1380 · 84048 Mainburg · Tel. [phone] · Fax [phone] · Internet: www.wolf-heiztechnik.de

23061344_201509
Index
Safety instructions ........................................................................................................3
Standards and regulations........................................................................................ 4-5
Control unit / Function / Operation............................................................................ 6-7
Dimensions / Transport dimensions ......................................................................... 8-9
Layout....................................................................................................................10-11
Positioning..................................................................................................................12
Assembly....................................................................................................................13
Installation ............................................................................................................ 14-17
Installation of a balanced ue system......................................................18
Power supply ..................................................................................... 19-22
Filling the system.....................................................................................23
Commissioning .................................................................................. 24-25
Checking the gas supply pressure...........................................................26
Filling the siphon / Checking the gas supply pressure.............................27
Displaying / modifying control parameters...............................................28
Limiting the maximum output...................................................................29
Selecting the pump stage ........................................................................30
Testing the combustion parameters.........................................................31
CO2 settings...................................................................................... 32-33
Commissioning report..............................................................................34
Technical conversion options for gas red condensing boiler CGB............................35
Conversion of combi boilers to boilers with cylinder...................................................36
Maintenance......................................................................................................... 37-51
Modulating pump (class A) .........................................................................................52
3-stage-pump .............................................................................................................53
Design information................................................................................................ 54-67
Underoor heating system..........................................................................................68
Technical maintenance and engineering details.........................................................69
Wiring diagram ...........................................................................................................70
Specication ...............................................................................................................71
Troubleshooting..........................................................................................................72
Product che according to Regulation (EU) no. 811/2013..........................................73
Technical parameters according to EU regulation no. 813/2013................................75
EC-Declaration of Conformity to Type........................................................................76

3
3061344_201509
The following symbols are used in conjunction with these
important instructions concerning personal safety as well
as technical reliability.
Safety instructions
This indicates technical instructions which you
must observe to prevent material losses and
boiler malfunctions.
NB
Danger through ‚live‘ electrical components.
Please note: Switch OFF the ON/OFF switch
before removing the casing.
Never touch electrical components or contacts
when the ON/OFF switch is in the ON position.
This brings a risk of electrocution, which may
result in injury or death.
The main supply terminals are ‚live‘ even when
the ON/OFF switch is in the OFF position.
„Safety instructions“ are instructions with which
you must comply exactly, to prevent injury and
material losses.
Fig.: Gas connection: Escaping gas may cause poisoning or the risk
of explosion
Fig.: Terminal box:
Danger from electric power
Fig.: Ignition transformer, high voltage ignition electrode, combustion
chamber
Risk through ‚live‘ electrical components, risk of burning through hot
components
Fig.: Gas combination valve
Danger from electric power
Escaping gas may cause poisoning or the risk of explosion

43061344_201509
Standards and regulations
Note: Please read these instructions carefully before
the installation and keep them in a safe place.
Please also note the technical information in
the appendix.
Requirements
The installation of the boiler must be in accordance with the
relevant requirements of Gas Safety (Installation and Use)
Regulations 1998, Health and Safety Document No. 635 (The
Electricity at Work Regulations 1989), BS 7671 (IEE Wiring
Regulations) and the Water Supply (Water Fitting) Regula-
tions 1999, or The Water Bylaws 2000 (Scotland). It should
also be in accordance with the relevant requirements of the
Local Authority, Building Regulations, including amendments
to the Approved Documents Part L and J 2002, The Building
Regulations (Scotland), The Building Regulations (Northern
Ireland) and the relevant recommendations of the following
British Standards:
BS 5440: Flues and ventilation of gas red boilers not ex-
ceeding 70 kW net:
- Part 1: Flues
- Part 2: Ventilation
BS 5449: Specication for forced circulation hot water for
domestic premises.
BS 5546: Specication for gas hot water supplies for do-
mestic premises.
BS 6700: Services supplying water for domestic use within
buildings and their curtilages.
BS 6798: Specication for installation of gas red boilers
not exceeding 60 kW input.
BS 6891: Specication for installation of low pressure gas
pipework up to 28 mm (R1“) in domestic premises
(2nd family gas).
BS 7593: Treatment of water in domestic hot water central
heating systems.
Institute of Gas Engineers Publication IGE/UP/7/1998:
„Guide for gas installations in timber framed housing“
Important: The appliance must be installed and serviced by
a competent person as stated in the Gas Safety (Installation
and Use) Regulations 1998. In IE, the installation must be in
accordance with the current edition of I.S,813 ´Domestic Gas
Installations´, the current Building Regulations and reference
should be made to the current ECI rules for electrical instal-
lation.
When tightening or loosening threaded connections always use
suitable open-ended spanners (not pipe wrench, or extensions,
etc.). Incorrect use and/or unsuitable tools can lead to damage
(e.g. gas or water leaks)!
Any damage or loss resulting from technical modi-
cations to the control unit or to the control compo-
nents are excluded from our liability.
Incorrect use can lead to a risk to life and limb or
to a risk of material losses.
Obtain the permission of your mains gas supplier and ue
gas inspector prior to the installation of Wolf gas red
boilers [where appropriate].
Wolf gas red boilers must only be installed by a recognis-
ed heating contractor. This heating contractor will also be
responsible for the proper installation and commissioning of
the heating system.
The following regulations, rules and guidelines must be ob-
served during installation:
- VDE 0722 / EN50165 Electrical equipment of heat gene-
rators with non-electrical heating
systems.
- DIN EN 12828 Heating systems in buildings, desi-
gning hot water heating systems
- EN 60335-1 Safety of electrical equipment for
domestic use and similar purposes
- VDE 0470 / EN 60529 Protection through housings

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3061344_201509
Gas red condensing boiler CGB-...
Gas red condensing boilers according to DIN EN 297 / DIN
3368 T5,T6,T7,T8 / DIN EN 437 / DIN EN 483 (draft)/ DIN EN
677 (draft) / DIN EN 625 and Gas Appliance Directive 90/396/
EEC (Gas Consumer Equipment), 92/42/EEC (Boiler Efciency
Directive), 2006/95/EG (Low Voltage Directive), and 89/336/
EEC (EMC Directive), with electronic ignition and electronic
ue gas temperature monitoring, for low temperature heating
and DHW production in heating systems with ow temperatures
up to 95 °C and 3 bar design pressure according to DIN EN
12828 part 3.
The Wolf gas red boiler is also approved for installation in
garages.
Standards and regulations
Open ue gas red condensing boilers must
only be installed in a room which complies with
the appropriate ventilation requirements. Other-
wise there is a risk of asphyxiation and poiso-
ning. Read these installation and maintenance
instructions before installing the boiler. Also
take the Technical Guide into consideration.
Poorly vented LPG tanks can lead to ignition
problems. In such cases, contact your local
LPG supplier.
Fig.: Wolf gas red condensing boiler
To save energy and protect against scaling if
the total hardness is greater than 2.5 mol/m³,
the DHW temperature may be set to a maximum
of 50 °C.
If the total hardness is greater than 3.58 mol/m³,
we recommend using a water treatment facility
in the cold water supply line for DHW heating,
to prolong the maintenance interval (descaling
DHW heat exchanger).

63061344_201509
Control unit / Function / Operation
DHW temperature selector
When gas red condensing boilers are combined with a DHW cylinder, setting 1 - 9
corresponds to a cylinder temperature of 15 - 65 °C. The setting on the DHW thermo-
stat becomes ineffective when the system is used in conjunction with a digital room
thermostat or a weather-compensated controller. The temperature will then be selected
at the controller (accessories). With combi boilers, setting 1 - 9 corresponds to a DHW
temperature of 40 - 60 °C.
Heating water temperature selector
The factory setting range 2 - 8 corresponds to a heating water temperature of 20 - 75 °C.
The setting on the heating water thermostat becomes ineffective when the system is used
in conjunction with a digital room thermostat or a weather-compensated controller.
ON/OFF switch
The gas red boiler is OFF in position 0.
Reset
A fault is reset by pressing the reset button which will also restart the system. Pressing
the reset button reactivates the system, if there was no fault.
Illuminated ring as status indicator
0I
9
1
28
37
46
5
28
3
7
4
6
5
Display Explanation
Flashing green Standby (power supply ON, no heat demand)
Constant green Heat demand: pump running, burner OFF
Flashing yellow Emissions test mode
Constant yellow Burner ON, ame steady
Flashing red Fault
ON/OFF switch DHW temperatu-
re selector
Pressure gauge
Reset
button
Heating water tem-
perature selector
Illuminated ring
Thermometer

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3061344_201509
Control unit / Function / Operation
Note: The number of times the gas boiler can be started in heating mode is limited electro-
nically. This limit can be bypassed by pressing the reset button. Then, the equipment
starts immediately, as soon as a heating demand is present.
In summer mode, the circulation pump operates for approx. 30 seconds after a maximum
idle period of 24 hours.
Anti-seizing
pump protection
Thermomanometer
The current heating water temperature is displayed in the top half. The water pressure
in the heating system is displayed in the lower half. In normal use, the water pressure
should be between 2.0-2.5 bar.
Setting Winter mode (position 2 to 8)
In winter mode, the boiler heats to the temperature selected at the heating water thermo-
stat. According to the pump operating mode, the circulation pump operates constantly
(factory setting) or only in parallel with the burner activation/run-on time.
Summer mode
Winter mode is deactivated by rotating the heating water temperature selector into po-
sition . In other words, the equipment will then operate in summer mode. Summer
mode (central heating OFF) means = only DHW heating. Frost protection for the central
heating system and pump anti-seizing protection are, however, assured.
Emissions test mode
The emissions test mode is activated by rotating the heating water temperature selector
into position . The illuminated ring ashes yellow. After the emissions test mode
has been activated, the boiler will heat to the selected maximum heating output. Any
previous cycle block will be cancelled. The emissions test mode terminates after 15
minutes or when the maximum ow temperature has been exceeded. For a renewed
activation, turn the heating water temperature selector anti-clockwise and then back
into position .
°C
bar
2
13
120 0
4
0
60
3090

83061344_201509
Dimensions / Transport dimensions
CGB
CGB combined with CSW-120
Fig.: DimensionsFig.: Dimensions
Fig.: Dimensions
200
440
154 144
640 281
32
344
654
40
54
Fig.: Connections
1263 45
 DHW ow
 Heating ow
 Heating return
 Heating return
 DHW return
 Condensate drain
190
855
48
393
270-420790
440
344
810
1800-1950

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3061344_201509
CGB-K
Dimensions / Transport dimensions
Fig.: DimensionsFig.: Connections
Heating ow
DHW connection (on site)
DHW connection
Gas connection
Cold water inlet
Cold water inlet (on site)
 Heating return
Condensate drain
Fig.: Dimensions
70
54 640
65440
32
281
120
200
440
344
Fig.: Dimensions
190
855
48
393
200
120
10
73
165
35 162 min.400
758 281
22
14
123
4567
8

10 3061344_201509
Layout
CGB
Manual air-vent valve
Flue pipe
Limit thermostat
Burner
Heating water heat exch.
Return sensor
Three-way diverter valve
Heating return
DHW ow
Gas supply pipe
Fan motor
Gas fan
Expansion vessel
Gas:air mixing chamber
Inlet pipe
Gas combination valve
Heating circuit pump
(auto venting)
Overow valve
Heating ow
DHW return
TBV/ow sensor
Flue gas temperature limiter
Gas restrictor
Condensate siphon
Limit thermostat
(only for CGB-24)

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3061344_201509
CGB-K
Manual air-vent valve
Flue pipe
Burner
Heating water heat exch.
Return sensor
Three-way diverter valve
DHW heat exchanger
Heating return
DHW connection
Gas supply pipe
Fan motor
Gas fan
Expansion vessel
Gas restrictor
Inlet pipe
Gas combination valve
Heating circuit pump
(auto venting)
Overow valve
Flow sensor
Cold water strainer
with ow switch
Heating ow
Cold water inlet
Condensate siphon
Flue gas temperature limiter
Gas:air mixing chamber
Limit thermostat
TBV/ow sensor
Limit thermostat
(only for CGB-K-24)
Layout

12 3061344_201509
Positioning
The CG... gas condensing centre for mounting on the wall is
delivered fully assembled with a power cable for the socket.
A clearance of 40 mm to the side and 400 mm to the ceiling is
recommended to enable inspection and maintenance work to
be carried out on the appliance, otherwise adequate inspection
and function tests on components cannot be ensured during
maintenance. The drain hoses must be secured with the xing
plate above the drain outlet (siphon). The drain should be able
to be inspected
The gas red boiler may only be installed in
rooms which are protected from frost.
Furthermore, all gas boiler components must be freely acces-
sible from the front, and ue gas measurements must be able
to be taken. If minimum dimensions and accessibility are not
maintained/given, Wolf may require accessibility to be provided
during a service visit.
General notes
The combustion air supplied to the boiler must
be free from chemicals, e.g. uoride, chlorine or
sulphur. Such materials are contained in sprays,
solvents and cleaning agents. Under the most un-
favourable conditions, these may lead to corrosion,
even in the ue gas system.
During the boiler installation, ensure that no
contaminants (e.g. drilling swarf) enter the gas
red boiler, otherwise faults may result. Use the
enclosed polystyrene cover.
NB
Clearance between the boiler and combustible
materials or components is not required, as
temperatures are limited to 85 °C at the rated
boiler output. However, explosive and easily
combustible materials must not be used in the
boiler room; these would create a risk of re or
explosion.
min.
500 mm
min.
400 mm
First determine where the appliance is to be installed.
Consider the ue gas outlet, the lateral clearances towards
walls and ceilings, and any existing connections for gas, central
heating, DHW and electrics.
The installation room and the combustion air
supplied to the appliance must be free from
chemicals, e.g. uoride and chlorine or sulphur.
Such materials are contained in sprays, paints,
adhesives, solvents and cleaning agents. These
may cause corrosion, even in the ue system.

13
3061344_201509
Assembly
- Mark the holes to be drilled ∅12 for the mounting bracket
bearing minimum clearances in mind.
- Insert the rawl plugs and secure the mounting bracket with
the screws provided.
- Hang the boiler with the mounting brace into the mounting
bracket.
Mounting brace
Fig.: Mounting brace on the boiler
An installation template is provided with the boiler to mark out
the xing holes and connections.
Align the template vertically and mark out the xing holes.
Maintain the minimum clearances towards walls and ceilings
required for maintenance.
Fig.: Fixing holes for mounting bracket
min. 562mm
Ceiling
Initially, determine the location for the installation of the gas
red boiler.
In your deliberations, consider the ue gas outlet, the lateral
clearances towards walls and ceilings and any existing con-
nections for gas, central heating, DHW and electrics.
Mounting the boiler with a mounting bracket
During the boiler installation ensure that the xing
components are sufciently strong to carry its weight.
Also consider the wall consistency, otherwise gas
or water may escape which would result in a risk of
explosions and ooding.
Opening the casing lid
We recommend you remove the casing lid during installation.
Pivot the control unit lid down.
Unlock the casing lid with the l.h. and r.h. rotating bolts.
Release the lower part of the casing lid and unhook at the
top.
Fig.: Installation template
Fixing holes
for mounting
bracket ∅12
...GU-...
...GG-...
...GB/...CG-...
Fig.: Open the rotating locks
rotating lock

14 3061344_201509
Installation
You may determine the connections for cold water and DHW,
for the central heating and gas supply pipe and safety valve
drain using the subsurface installation template, if these ser-
vices are laid under the surface.
Route the supply lines for gas, central heating and DHW
underneath the surface in accordance with the enclosed
installation template.
Supply line – subsurface version
You may determine the connections for cold water and DHW,
for the central heating and gas supply pipe(s) and safety valve
drain using the panel for unnished walls (accessories), if these
services are laid under the surface.
Solder the elbows of the panel for unnished walls to the
supply lines. (Each of the elbows can be turned 360° for easy
connection of the supply lines from any direction).
Fit the installation accessories.
Fig.: Panel for mounting on unnished walls (accessories)
for: CGB-K, CGB with FSW-120
Fig.: Subsurface installation template
Fig.: Panel for mounting on unnished walls (accessories)
Fig.: Connection panel for surface mounted version (acces-
sories) for: Gas red boilers CGB
Fig.: Connection panel for surface mounted version (acces-
sories) for: Gas red combi boilers CGB-K
You may determine the connections for cold water and DHW,
for the central heating and gas supply pipe(s) and safety valve
drain using the panel for nished walls (accessories), if these
services are routed above the surface.
Fit the installation accessories for the gas red combi boiler
and connect the supply lines as surface mounted version.
Supply line – surface mounted version

15
3061344_201509
Installation
Fig.:
Maintenance valve, angled
version (accessories)
Fig.:
Maintenance valve with safety
valve connection, angled ver-
sion (accessories)
Heating circuit
We recommend the installation of a maintenance valve into the
central heating ow and return – angled version for installations
below the surface, straight version for surface mounting.
Provide a ll and drain valve at the lowest system point.
The heating circuit pump speed can be adjusted and can,
therefore, be matched to various system requirements. Install
an external overow valve if ow noises still occur.
Fig.:
Maintenance valve, straight
version (accessories)
Fig.:
Maintenance valve with safety
valve connection, straight ver-
sion (accessories)
Notes:
Heating circuit safety valve
Install a safety valve with marking „H“, max. 3 bar.
Fig.: Heating circuit safety valve (accessories)
Fig.: Cold water supply acc. to DIN 1988
We recommend the installation of a maintenance valve into
the cold water supply. A tested and certied pressure reducer
must be installed, if the cold water supply pressure is above
the maximum operating pressure of 10 bar.
Provide a centralised pressure reducer, if mixer taps are
used.
Observe the regulations of your local water supply company
when connecting cold water and DHW.
Your guarantee rights may be affected if the installation does
not comply with the illustration shown.
Cold water and DHW connection
Drain Drain Shut-off valve Pressure reducing valve Shut-off valve Cold water inlet Pressure gauge connection Drinking water lter

16 3061344_201509
Installation
Connection of a Wolf DHW cylinder
If a DHW cylinder is connected to the gas red boiler, replace
the pipe bends in the central heating ow with a three-way
diverter valve from the Wolf accessory range, and remove the
dummy plug from the junction of the heating return. A detailed
description is included with the connection set (accessories).
Fig.:
Connection set for Wolf cy-
linder CSW-120
subsurface installation
(accessories)
Fig.:
Connection set for Wolf cylinder
CSW-120
surface installation
(accessories)
If the boiler is operated with an empty siphon there
is a danger of poisoning by evading ue gas. There-
fore ll siphon with water prior to commissioning.
Unscrew, remove and ll up siphon until water eva-
des from lateral connection. Fit siphon again and
take care for proper position of the gasket.
Fig.: Push in the tab
Tab
Fig.: Siphon
Siphon
Information regarding scaling from the VDI 2035:
Scaling can be strongly inuenced particularly through the
method of commissioning. If the system is heated up with a
low output, or slowly in stages, the possibility can arise that the
lime not only settles in the hottest spots, but is also distributed
evenly across the entire system, even forming sludge deposits.
For multiboiler systems it is recommended to commission all
boilers simultaneously to prevent the overall amount of lime
concentrating on the heat exchanger surface of an individual
boiler. If appropriate, start with the screed drying program. The
ÖNORM H5195-1 species that a hardness level of 17° dH
is not exceeded.
There is a risk of poisoning through ue gases
being expelled, if the appliance is operated with
an empty siphon. Therefore, ll the siphon with
water prior to commissioning. Undo the siphon,
remove it and ll it until water runs out of the
drain hole on the side. Ret the siphon and
ensure the gasket seals tightly.
Condensate connection
First pivot the control unit cover down. Undo the r.h. and l.h.
screw as shown in the gure; unhook the casing cover at the
top and remove. Push the tab on the control unit casing inwards
and remove the casing. Connect the supplied sealed siphon
to the connector on the condensate pan.
The condensate may be routed into the siphon below the safety
valve, if neutralisation is not required.
Connect the supplied sealed siphon to the connector on the
condensate sump.
The condensate may be routed into the siphon below the safety
valve, if neutralisation is not required.
If condensate is directly routed to the public sewer, ensure
ventilation, so that the public sewer cannot affect the con-
densing boiler.
Observe the enclosed instructions if you install a neutralising
system (accessories).
The Code of Practice M251 prescribes no neutralising system
for boilers up to 200 kW.
If a neutralising system is used, the national regulations regar-
ding the disposal of residues from such systems apply.
Fig.: Open the rotating locks
rotating lock

17
3061344_201509
Installation
Gas ttings on the gas burner may be pressure
tested to 150 mbar. Higher pressure may dama-
ge the gas burner tting, resulting in a risk of
explosion, asphyxiation or poisoning.
Close the gas shut-off valve on the gas red
boiler to pressure test the gas pipe.
Mount the gas ball valve in an easily accessible
place.
Connection of a 200 litre Wolf DHW cylinder or third
party cylinder
Connect the DHW ow and return with a three-way diverter
valve or the return of the gas red boiler. Use a DHW sensor
from the Wolf accessory range when connecting a DHW cy-
linder made by third parties. A detailed description is included
with the connection set (accessories).
Fig.: Connection set for Wolf cylinder, 200 l, solar buffer
SEM or third party cylinder (accessories)
Gas connection
Laying the gas pipe as well as gas connections
must only be carried out by a licensed gas tter.
Close the gas shut-off valve on the gas red boiler
to pressure test the gas pipe.
Clean all residues from the heating pipework and the
gas pipe prior to connecting the boiler, particularly
in older systems.
Prior to commissioning, test all pipe and other gas
connections for soundness.
Inappropriate installation or using unsuitable com-
ponents or assemblies may lead to gas escaping,
which results in a risk of poisoning and explosion.
Install a gas shut-off valve with re protection in
the gas supply line upstream of the Wolf gas red
boiler. Otherwise explosions may occur during a re.
Size the gas supply line in accordance with current
regulations.
Fig.:
Gas shut-off valve straight version (accessories)
Fig.:
Gas shut-off valve angled version (accessories)

18 3061344_201509
Installation of a balanced ue system
In tight spaces, CO2 value and flue gas tempe-
rature can be tested immediately downstream of the
boiler at a connection adaptor with inspection piece
(80/125 system) or alternatively at an inspection piece with
connector (60/100 system).
The ue gas test ports must remain accessible to
the relevant authorities, even after tting the ceiling
bezels.
NB
Fig.: Example: Balanced ue system
For concentric air/ue pipes (balanced ue systems),
use only original Wolf components.
Please observe the technical information regarding
balanced ue systems prior to installing the ue pipe
or the ventilation air connection.
Different countries have different regulations. We
would therefore recommend you contact the appro-
priate authorities to check local requirements.
NB

19
3061344_201509
AF
E1 eBUS
+-12
ab
Netz
ZA1
N
N
N
L1
L1 L1
12 12
12
L1 L1
L1 NN
N
3 3 3 2 2 2
Power supply
Installation information, power supply
- Isolate the system from the power supply before opening
the casing.
- Pivot the control unit to the side.
- Open the terminal box.
- Insert the strain relief into the holes provided.
- Strip approx. 70 mm off the power supply cable insulation.
- Push the cable through the strain relief and secure the strain
relief.
- Pull the Rast5 plugs.
- Terminate the appropriate cores at the Rast5 plugs.
- Push the inserts back into the terminal box casing.
- Push the Rast5 plugs back into their correct positions. Strain relief
F 3,15 A
Rast5 plugs
General notes
The power supply terminals are ‚live‘ even when
the ON/OFF switch has been switched OFF.
The installation must be carried out by a licensed
electrical contractor. Observe local regulations
and those of the power supply company.
Terminal box
The control, regulating and safety equipment are fully wired
and tested.
You only need to connect the power supply and the external
accessories.
Mains electrical connection
Connect the power supply permanently or with a safety plug
(no plug connection in protective areas 1 and 2, i.e. near a
bath or shower).
Provide the power supply via a mains isolator (e.g. fuse, heating
system emergency stop), which ensures at least 3 mm contact
separation for all poles.
Flexible connecting cable, 3 x 1.0 mm² or solid cable, max.
3 x 1.5 mm².
The plug must be accessible when using a power supply cable
with safety plug. Flexible power supply cable 3 x 1.0 mm².
Power supply
230 V AC/50Hz
Power supply, ext. accessories
230 V AC/50Hz/max. 300 VA
Programmable
output
230 V AC/50Hz
Programmable
input zero volt Outside
temp.
sensor
Data BUS
(controller, radio clock, AF with radio
clock, receiver, outside radio sensor)
Terminal box

20 3061344_201509
Power supply
DHW sensor connection
- When a cylinder is to be connected, the blue socket of the
cylinder sensor must be connected to the blue plug of the
control unit.
- Observe the cylinder installation instructions.
Fig.: Blue plug, cylinder sensor connection
Blue plug
Connection DHW circulation pump/
external accessories (230 V AC)
Insert the cable glands into the terminal box. Insert and secure
the cable through the cable gland.
Connect the DHW circulation pump 230 V AC, which is part of
the Wolf accessory range, to terminals L1, N and .
Fig.: Connection DHW circulation pump/external accesso-
ries
Connection output A1 (230 V AC; 200 VA)
Insert the cable glands into the terminal box. Insert and secure
the connecting cable through the cable gland. Connect the
cable to terminals L1, N and .
The parameters for output A1 are described in the table on
the following page.
Fig.: Connection output A1
Changing a fuse
Isolate the condensing boiler from the power
supply prior to changing a fuse. The ON/
OFF switch on the boiler does not provide
separation from the power supply.
Danger through ‚live‘ electrical components.
Never touch electrical components or con-
tacts as long as the condensing boiler has
not been isolated from the power supply.
Risk to life.
Fig.: Pivot the control unit forward; terminal box cover open
Fuse
Netz
ZA1
N
N
N
L1
L1 L1
L1 L1
L1 NN
N
3
Netz
ZA1
N
N
N
L1
L1 L1
L1 L1
L1 NN
N
3