Wolf FGB Series Instruction Manual

3064461_201903
GB
IE
Operating instructions for users
WALL MOUNTED GAS CONDENSING BOILER
FGB wall mounted gas condensing boiler
FGB-K wall mounted gas condensing combi boiler
English | Subject to technical modications
FW ≥ 1.10

02 | WOLF GmbH 3064461_201903
Table of contents
1 Safety instructions ................................................................................................................... 03
General information .................................................................................................................................... 03
Electrical connection .................................................................................................................................. 04
Shutting down the heating system ............................................................................................................. 04
Emergency shutdown ................................................................................................................................. 04
If you smell gas .......................................................................................................................................... 05
If you smell ue gas ................................................................................................................................... 05
When changing a fuse ............................................................................................................................... 05
Frost protection .......................................................................................................................................... 05
Balanced ue system ................................................................................................................................. 05
2 Operation via the control unit ................................................................................................. 06
Display menu ............................................................................................................................................. 06
Reset .......................................................................................................................................................... 06
Operating mode button .............................................................................................................................. 06
Set DHW temperature display/adjustment ................................................................................................. 07
Set boiler water temperature display/adjustment ....................................................................................... 07
Display ....................................................................................................................................................... 08
3 Installation / Maintenance........................................................................................................ 09
Installation / Modications .......................................................................................................................... 09
Checking the water pressure in the heating system .................................................................................. 09
Care ........................................................................................................................................................... 09
Inspection / Maintenance ........................................................................................................................... 09
4 Informationforenergyefcientoperation ............................................................................. 10
Heating mode ............................................................................................................................................. 10
DHW mode ................................................................................................................................................. 10
5 Notes...........................................................................................................................................11

Safety instructions
3064461_201903 WOLF GmbH | 03
1 Safety instructions
Gas is an environmentally-friendly fuel which does not pose
a risk unless handled with gross negligence. Your gas con-
densing boiler is a high-quality product which incorporates
the latest safety technology.
These safety instructions are intended to protect you
from potential risks.
Risk to life!
Non-observance of information labelled in this way can endanger
health and cause material damage.
Whenthereisariskofre
• Immediately switch OFF the emergency stop switch of the heat-
ing system (if outside the installation room).
• Close the gas shut-off valve.
• In the event of a re, use a suitable re extinguisher (class B to
DIN 14406).
Caution – risk of electrocution.
This appliance may be used by children aged from 8 years and
above and by persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning how to use the appliance
in a safe manner and understand the hazards involved. Children
must not play with the appliance. Cleaning and user maintenance
must not be performed by children without supervision.
General information

Safety instructions
04 | WOLF GmbH 3064461_201903
Electrical connection The installation must be carried out by an approved
electrical contractor. Observe VDE regulations as well
as all local regulations of your power supply utility.
Danger due to ‘live’ electrical components.
Please note:
Switch OFF the omnipolar isolator before removing
the casing.
Never touch electrical components or contacts when
the isolator is in the ON position. This carries a risk
of electrocution that could result in injury or death.
No mains isolator on the appliance. When working on
the boiler, always ensure that there is no voltage by
opening the omnipolar isolator or removing the ex-
ternal mains fuse.
- Switch OFF the heating system at the omnipolar isolator or the
external mains fuse of the control unit. Please note: It is not
possible to isolate the appliance from the power supply using
the operating mode button.
- Close the gas ball valve or the main gas tap.
Shutting down the
heating system
Emergency shutdown The fuse in the installation room or the heating emergen-
cy stop switch may only be used to switch off the heating
system in an emergency.
- In the event of danger, e.g. re, disconnect the heating system
from the power supply using the heating emergency stop switch
or the relevant mains fuse.
- Shut off the gas supply using the gas ball valve on the boiler or
the main gas tap on the gas meter.

Safety instructions
3064461_201903 WOLF GmbH | 05
SAFETY INSTRUCTIONS
Balanceduesystem With low outside temperatures, the water vapour contained in the
ue gas may condense on the balanced ue and freeze. This ice
may fall from the roof, causing personal injury or material
losses. Prevent ice from falling by taking on-site measures, e.g.
installing a snow guard.
Caution – risk of injury.
Frost protection The use of antifreeze is not permissible.
The control unit protects the gas condensing boiler against frost.
The risk of frost cannot be totally prevented, e.g. during longer
power failures. Therefore install the gas condensing boiler only
in rooms that are free from the risk of frost. Should there be a
risk of frost during longer idle periods when the heating system is
switched off, ask your local heating contractor to drain the condens-
ing boiler and the heating system to prevent pipes from bursting.
Caution – risk of water damage and faulty operation
due to freezing.
When changing a fuse Isolate the appliance from the power supply prior to changing a
fuse. The mains terminals are 'live' even when the appliance is in
standby mode (OFF).
Caution – risk of electrocution.
Ifyousmelluegas - Shut down the system.
- Open windows and doors.
- Notify your local contractor.
Caution – risk of poisoning.
- Do not switch on any lights.
- Do not operate electrical switches.
- No naked ames.
- Close the gas shut-off valve.
- Open windows and doors.
- Notify your gas supply utility or grid operator; use a telephone
outside the danger area.
Caution – risk of poisoning, asphyxiation and explosion.
If you smell gas
Gas ball valve
To open: Push and turn anti-
clockwise
To close: Turn clockwise

Operation via the control unit
06 | WOLF GmbH 3064461_201903
2 Operation via the control unit
If the appliance is connected to a BM-2 the setting functions are deactivated. The BM-2 takes over these
functions.
Please
note
Emissions test mode
(To enable, press and hold buttons
simultaneously for 5 s)
- The boiler runs under full load for 15 mins.
- Press "Reset" to disable.
Display menu Reset
- Reset
(Press1xbriey)
- Bring up contractor level
(press and hold for 10 s), only
for contractors.
Operating mode button
Standby (OFF)
Summer mode
Winter mode
Only DHW heating enabled
The boiler is switched off,
only frost protection is
enabled.
Heating and
DHW heating enabled
- Select code
- Display code value
- Display code

Operation via the control unit
3064461_201903 WOLF GmbH | 07
Set DHW temperature display/adjustment
(After pressing the key, the current value ashes. Press again to change the value.
The value is immediately applied and saved.)
Set boiler water temperature display/adjustment
(After pressing the key, the current value ashes. Press again to change the value.
The value is immediately applied and saved.)
DHW temperature hotter
DHW temperature colder
Central heating hotter
Central heating colder

Operation via the control unit
08 | WOLF GmbH 3064461_201903
Display menu Reset
Display
DHW mode
(A ashing symbol indicates an active heat demand for DHW heating.)
Only shown if DHW heating is available.
Heating mode
(A flashing symbol indicates an active heat demand for heating operation.)
Changes are only possible if the heating curve is disabled.
Shown when there are active fault codes.
Reset button (press 1x briey).
Fault codes are reset.
Display of temperature, fault codes, HG parameters and set values. In emissions test mode,
the modulation level is displayed.
Burner modulating levels
Service
- Emissions test mode enabled.
- Fault is displayed.
Indication of water pressure in the heating system.
Venting program
When switching on the mains power, following a power failure, if the water pressure is below
0.5 bar or if the high limit safety cut-out is reset, the venting program runs for 2 minutes.
The gas fan runs for the rst 30 s and then stops. The pump and 3-way diverter valve are
activated alternately. To cancel, press “reset”.
A fault in the heating system is indicated by a fault code
and the ashing service symbol.
The specialist contractor can quickly identify the fault
via the reset button and with the help of a fault code
table.
−In the event of a fault, please observe the
information in the installation instructions for
contractors.
−If a fault occurs in your heating system, please
contact your specialist contractor.
Please note:
Faultsmustonlyberepairedbyqualiedpersonnel.
If a lockout fault message is acknowledged sev-
eral times without the cause of the problem being
repaired, this can lead to component or system
damage.
The control unit automatically acknowledges faults such
as faulty temperature sensors or other sensors if the
part concerned has been replaced and plausible test
values have been supplied.
Name Description Display in
i00 1) Flow sensor temperature (°C)
i01 Flow temperature (°C)
i02 Return sensor temperature (°C)
i03 DHW sensor temperature (°C)
i04 DHW solar inlet / DHW cylinder
temperature
(°C)
i05 Flue gas sensor temperature (°C)
i06 Outside temperature (°C)
i07 Fan speed (rpm x 60)
i08 PWM pump speed (%)
i09 DHW ow rate (l / min)
i10 Actual water pressure bar
i11 High limit safety cut-out ON and OFF
i12 Flame current (µA x 10)
i13 Firmware version Version
x.xx
1) from FW 1.10

Installation / Maintenance
3064461_201903 WOLF GmbH | 09
3 Installation / Maintenance
Installation/Modications Your gas condensing boiler should only be installed and modied by an
approved heating contractor, as only they have the essential knowledge to
carry out such work.
- Never modify ue gas components.
- Never close or restrict the ventilation apertures in doors or walls when
operatingtheboilerinopenuemode;onlystarttheboilerwhenthe
uehasbeenfullyinstalled.
- When operating the gas condensing boiler in room sealed operation,
onlystartitwhenthebalanceduesystemhasbeenfullyinstalledand
the wind protector is not covered.
- Never modify the drain or the safety valve.
Caution – failure to observe these instructions may lead to a risk
ofre,permanentdamage,poisoningorexplosion.
The installation room and the combustion air supplied to the
appliance must be free from chemicals, e.g. fluoride, chlorine
or sulphur. Such materials are contained in sprays, paints,
adhesives, solvents and cleaning agents. Under unfavourable
conditions, these may lead to corrosion, including in the flue
system.
The appliance is not suitable for outdoor installation.
Care Only clean the casing with a damp cloth and a mild chlorine-free detergent. To
nish, dry off immediately.
Checking the water pressure
in the heating system
Regularly check the water pressure. The pressure must be between 1,5 and
2,0 bar. Your heating contractor will explain how to top up your system. Do not
add additives to your heating water, otherwise components may be damaged.
Inspection / Maintenance Caution - only a heating contractor has the required
knowledge and expertise.
- According to paragraph 10(3) ENEV, the user is required to have the system
serviced regularly to safeguard the reliable and safe function of the gas
condensing boiler.
- Your gas condensing boiler should be serviced annually.
- The system operator is obliged to provide documentation.
- Isolate the boiler from the power supply before any maintenance work.
- Only use genuine spare parts. Wolf accepts no liability for damage caused
by spare parts not supplied by Wolf.
- After a service and before the gas condensing boiler is restarted, check
that all components that were removed for maintenance have been retted
correctly.
- We recommend you arrange a maintenance contract with an approved heating
contractor.
Seal the front casing tightly with screws after completing the
service.Thereisariskofcarbonmonoxidepoisoningiftheue
system is faulty.

Informationforenergyefcientoperation
10 | WOLF GmbH 3064461_201903
4 Informationforenergyefcientoperation
Heating mode Saving energy with state of the art heating technology:
Gas condensing technology saves money.
Modern condensing technology also harnesses the energy which in conventional
heating systems is expelled unused to the atmosphere, and uses it for heating.
Regular heating system maintenance pays for itself
A contaminated burner or a poorly adjusted gas condensing boiler can reduce
the efciency of a heating system. Having your system maintained regularly
by your local contractor quickly pays for itself.
Heating at the lowest energy level
Operate your heating system, where possible, with a return temperature of less
than 45 °C, to achieve maximum utilisation of condensing technology.
A heating control unit also regulates your heating costs
A heating system in standby mode saves energy. A modern, weather-
compensated or room-temperature-dependent heating control unit with
automatic night setback and thermostatic valves ensures that the system only
operates when heat is required, saving you money the rest of the time.
- Equip your heating system with a weather-compensated heating controller
from the Wolf range of accessories. Your heating contractor will be happy to
advise you about the optimum settings.
- In conjunction with Wolf control unit accessories, use the night setback
function to match the energy level to the actual period of demand.
- Make use of the summer mode option.
Minimise energy loss by airing sensibly
Airing a room for hours means the heat stored in walls and objects is lost. As a
result, the indoor conditions will only become comfortable again after prolonged
heating. Short and thorough airing is more effective and more pleasant.
Bleeding radiators
Regularly bleed the radiators in every room. This ensures that radiators
and thermostats will continue to operate smoothly, particularly in the upper
apartments of apartment blocks. The radiator responds quickly to changing
heat demands.
Keep your operating instructions safe in an easily accessible place near your boiler.
Sensible handling of DHW
Showering consumes only approx. 1/3 of the water volume required for a bath.
Repair any dripping taps immediately.
DHW mode

Notes
3064461_201903 WOLF GmbH | 11
5 Notes

WOLF GmbH | Postfach 1380 | D-84048 Mainburg
Tel. [phone] | Fax [phone] | www.WOLF.eu