Wolf COB User manual

Operating instructions
Oil condensing boiler
COB Boiler for heating
COB-CS Boilerwithstraticationcylinder
Subject to technical modicationsArt.-Nr.: 30 62 548
Wolf GmbH · Postfach 1380 · D-84048 Mainburg · Tel. [phone] · Fax [phone] · Internet: www.wolf-heiztechnik.de
04/09 GB

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Index
Index ...................................................................................................... Page
Safety instructions ...................................................................................................... 3
Installation information / Maintenance information ..................................................... 4
Hydraulic connections ............................................................................................... 5
Control unit operation ................................................................................................. 6
Information for energy-efcient operation ............................................................... 7-8
Faults / Fault codes .................................................................................................... 8
Your oil condensing boiler is a high-quality product which incorporates the latest
safety technology.
Thesesafetyinstructionsshouldprotectyoufrompotentialrisks.
General notes

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Safetyinstructions
SAFETY INSTRUCTIONS
Ifyousmelluegas - Shut the system down
- Open windows and doors
- Notify your local contractor
Caution - risk of poisoning!
When changing a fuse - Isolate the boiler from the power supply before changing a fuse. The mains
terminals of the boiler are 'live' even when the ON/OFF switch has been switched
OFF.
Caution - risk of electrocution!
Frost protection The oil condensing boiler will be automatically protected against frost as long as it is
switched on.
The use of anti-freeze is not permissible.
Completely drain the boiler if necessary.
Caution-riskofwaterdamageandfaultyfunctionthroughfreezing.
Balanceduerouting With low outside temperatures, the water vapour contained in the ue gas may
condense and freeze on the balanced ue. Thisicemayfallfromtheroofcausing
injuryormateriallosses. Prevent ice from falling by taking on-site measures,
e.g. the installation of a snow guard.
Caution-riskofinjury.

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Installation information / Maintenance
information
Corrosion protection Do not use (for cleaning, polishing etc.) or store sprays, solvents, chlorinated cleaning
agents, paints, lacquer, adhesives, salts etc. on or in the vicinity of the oil condensing
boiler. Under unfavourable conditions, these materials may lead to corrosion in the
boiler and the ue gas system. Ducted vents routed through a roof may also contain
corrosive vapours.
Positioning/modications - Your oil 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.
- Flue gas components must not be modied.
- Never close or restrict the ventilation apertures in doors or walls when
operatingtheboilerintheopenuemode;onlystarttheboilerwhentheue
hasbeenfullyinstalled.
- Onlyoperatetheboilerinbalanceduemode,afterthebalanceduesystem
hasbeenfullyinstalledandthewindprotectorisnotcoveredup.
- Oil condensing boilers may only be installed in rooms which are protected from
frost.
- Never isolate the oil condensing boiler from the power supply when outside
temperatures fall below freezing, otherwise there is a risk of the system freezing
up.
- Do not modify the drain or the safety valve.
Caution-ignoringthisrulemayleadtoariskofreaswellasariskof
destruction,poisoningorexplosion!
 Do not use or store explosive and ammable materials, e.g. petrol,
thinners,paints,paperetc.insidetheboilerroom!
Care Clean the casing with a damp cloth and a mild cleaning agent (must not contain
chlorine). Then dry immediately afterwards.
The boiler components may only be cleaned by a heating contractor.
Maintenance   NB-onlytheheatingcontractorofferstherequiredknowledgeand
expertise!
- According to the regional regulations, the user is obliged to arrange regular
maintenance of the system in order to ensure the reliable and safe function of the
oil condensing boiler.
- Your boiler should be serviced annually.
- Maintenance is explicitly detailed in the installation and maintenance instructions.
- Isolate the boiler power supply before any maintenance work is carried out.
- After a service and before the oil condensing boiler is restarted, check that all
components that were removed for maintenance have been properly retted.
- We recommend you arrange a maintenance contract with an approved heating
contractor.

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Hydraulicconnections
Please note before commissioning
Filling the siphon The siphon must be tted and lled. Otherwise there is a risk of ue gas escaping.
Opening the shut-off valves The shut-off valves for heating ow and return must be open.
Regularly check the water level. The pressure gauge must indicate between 1.5 and
2.5 bar. Your heating contractor will explain how to top up your system. Do not supplement
your heating water with additives, otherwise components may be damaged.
Checking the water level
Fillingthesystem The heating system must be completely lled with water. If necessary top up with
water. When lling the heating system, the shut-off valves must be open. The system
pressure must be 1.5 to 2.5 bar. The connection required for lling between the
tap water and heating water must be removed after the ll has been completed.
Otherwise there is a risk that your tap water will be contaminated by heating water.
Inhibitors are not permissible. Otherwise there is a risk of damage to
the boiler.
NB

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Control unit operation
ON/OFF switch DHW temperature
selector
Reset button
Heating water
temperature
selector
Illuminated signal ring
Thermometer
Illuminated signal ring Explanation
Flashing green Standby (power supply ON, burner OFF, e.g. summer mode)
Constant green light Winter mode: Pump running, burner OFF
Flashing yellow Emissions test mode
Constant yellow light Burner operating, ame ON
Flashing red Fault
Illuminated signal ring as status indicator
Control unit operation
Summer mode (heating OFF)
Winter mode position 2 to 8
Emissions test mode (illuminated ring ashing yellow)
DHW temperature selector, boiler 1 (15 °C) ... 9 (65 °C)
Heating water temperature selector 2 (20 °C) ... 8 (75 °C)
Note:
The BM programming module can also
be integrated into the boiler control unit.
That means that all adjustments are made
at the boiler control unit. For installation
and operation, see installation instructions
and BM programming module operating
instructions.

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Informationforenergy-efcient
operation
Heating mode Savingenergywithmodernheatingtechnology:oilcondensingtechnology
savesyourcash
Modern condensing technology utilises that energy for heating, which in conventional
heating systems is expelled unused to the atmosphere with the ue gas.
Useaslittleelectricalenergyaspossible
Operate your system with multi-stage heating pumps at the lowest possible level.
Modulating pumps generally do not require adjustments, since they are automatically
matched to the prevailing demand.
Regularheatingsystemmaintenancepaysforitself
A contaminated burner or poorly adjusted boiler can reduce the heating system
efciency. Regular heating system maintenance through 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 the highest possible utilisation of condensing technology.
Aheatingsystemcontrolunitalsoregulatesyourheatingcosts
A heating system in standby mode saves energy. A modern, weather-compensated
or room temperature dependent heating system control unit ensures - with automatic
night setback and thermostatic valves - that the system only operates when heat is
required, saving money for 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 optimum adjustments.
- In conjunction with the Wolf control unit accessory, use the night setback function
to match the energy level to the actual demand period.
- Use the optional summer mode adjustment.
Neveroverheatyourhome
Adjust the room temperature as accurately as possible. This leaves occupants
comfortable and energy is not wasted on providing heating output that nobody needs.
Differentiate between the optimum temperature for different rooms, such as living
rooms and bedrooms.
A room temperature which is one degree higher than necessary represents an
additional energy consumption of approx. 6%.
- Use room thermostats to match the room temperature to the actual use of the
room.
- In any room where you have installed a room temperature sensor, open the
thermostatic valve fully. This enables you to achieve optimum control
characteristics for your heating system.
Ensureadequateaircirculation
Air must be able to circulate freely near the radiators and the room temperature
sensors, otherwise the heating system will lose effectiveness. Badly positioned long
curtains or furniture "swallow" up to 20% of energy.

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Informationforenergy-efcient
operation
Keep the heat inside the room - at night too
At night, closing shutters and drawing curtains noticeably reduces heat losses via the
window areas. Insulating the radiator recesses and light coloured paintwork can save
up to 4% off your heating bills. Airtight joints at windows and doors also help to keep
energy inside the room.
Minimiseenergylossthroughsensibleventilation
Ventilating for hours loses heat stored in walls and objects. As a result, the room
climate will only become comfortable again after prolonged heating. Short and
thorough airing is more effective and pleasant.
Venting the radiators
Regularly vent the radiators in every room. This safeguards the perfect function of
radiators and thermostats, particularly in the upper apartments of apartment blocks.
The radiator responds quickly to changing heat demands.
Intelligent use of DHW circulation pumps
Always control DHW circulation pumps via time switches. Program these in accordance
with your DHW demand patterns.
DHW mode The optimum DHW temperature
Only ever set the DHW temperature or that of the cylinder to the temperature you
really require. Any additional heating uses additional energy.
Sensible handling of DHW
Showering consumes only approx. 1/3 of the water volume required for a bath. Repair
any dripping taps immediately.
Keepyouroperating instructionssafein aneasilyaccessible placenearyour oilcondensingboiler.The Velcrostrip
enablesyoutottheclearwalletinasuitableposition,forexampleonthesideoftheboiler.
Faults / Fault codes If the illuminated ring of the status indicator ashes red, where possible read the fault
code on the connected control unit accessory and note the code. The boiler can be
restarted by pressing the reset button. In case of repeated faults, switch OFF the
boiler and notify your heating contractor.
Oil condensing boilers are equipped with an electronic ue gas temperature limiter.
The system automatically shuts down when the ue gas temperature exceeds 110 °C.
The boiler can be restarted by pressing the reset button. If this recurs, ask your
heating contractor to check the ue gas system.
 Caution-riskofdamage,poisoningandsuffocation!