Wolf CGU-2K-24 Operating Instructions Manual

Wolf GmbH · Postfach 1380 · 84048 Mainburg · Tel. 08751/74-0 · Fax 08751/741600 · Internet: www.wolf-heiztechnik.de

Operating instructions

as combi boilers and gas boilers

with integrated cylinder connection

CGU-2-18/24

CGG-2-18/24

CGU-2K-18/24

CGG-2K-18/24

Part no: 3062348_0511 Subjecttomodications GB

2 3062348_0511

Index

Index ...................................................................................................... Page

General information .................................................................................................... 2

Safetyinstructions ...................................................................................................... 3

Installationinformation/Maintenanceinformation .................................................. 4-5

Hydraulicconnections ............................................................................................... 6

Control unit operation ................................................................................................. 7

Informationforenergy-efcientoperation ............................................................... 8-9

Faults/Faultcodes .................................................................................................... 9

Type plate (Example)

Thetypeplateislocatedontheinsideoftheboilercasingandcontainsthefollowing

information:

Theseoperatinginstructionsarefortheattentionofthesystemuser.Theinstallation

andmaintenanceinstructionsaredocumentsintendedforthecontractor.

Enclosed documents

Gasisanenvironmentally-friendlyfuelwhichdoesnotrepresentanydangerunless

handledwithgrossnegligence.Yourgasredboilerisahigh-qualityproduct which

incorporatesthelatestsafetytechnology.

These safety instructions should protect you from potential risks.

General notes

3062348_0511 3

Safety instrucions

If you smell gas

- Neverturnonalightswitch.

- Neveroperateelectricalswitches.

-Keepnakedamesaway.

- Closethegasshut-offvalve.

- Openwindowsanddoors.

- Informyourgassupplyutility;useatelephoneoutsidethedangerarea.

Caution - risk of poisoning, suffocation and explosion.!

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mainssupplypriorto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

AslongastheboilerisswitchedON,itwillbeautomaticallyprotectedagainstfrost.

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 system

(only CGG-2)

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catchergrille.

Caution - risk of injury.

SAFETY INSTRUCTIONS

4 3062348_0511

Installation information /

Maintenance information

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gasred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.

Caution - ignoring this rule may lead to a risk of re as well as a risk of

destruction, poisoning or explosion.

Corrosion protection

- Yourgasred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.

- 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.

- Thegasredboilermayonlybeinstalledinroomsthatareprotectedfromfrost.

- Neverisolatetheboilerfromthepowersupplywhenoutsidetemperaturesfallbelow

freezing,as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.

Positioning / modications

Energy, and therefore operating costs, can be effectively saved through low DHW

temperatures.Furthermore,scalingupoftheat-plateheatexchangerinthegascombi

boilerversion can beprevented. If the water’s hardness is greater than 15°d.H. the

cylinderwatertemperatureshouldbelimitedto55°C.

Water hardness

3062348_0511 5

Installation information /

Maintenance information

Cleanthecasingwithadampclothandamildcleaningagent(whichmustnotcontain

chlorine).Thendryimmediatelyafterwards.Thegasredboilercomponentsmayonly

be cleaned by a heating contractor.

Care

Caution - only the heating contractor has the required knowledge and

expertise!

- Accordingtotheregionalregulations,theuserisobligedtoarrangeregularmainte-

nanceofthesystem,inordertoensurethereliableandsafefunctionofthegasred

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completingmaintenance,andbeforethegasredboilerisrestarted,ensure

thatallcomponentsthathavebeenremovedformaintenancehavebeenproperly

retted.

- Werecommendyouarrangeamaintenancecontractwithanapprovedheatingcon-

tractor.

Please keep your operating instructions safe, in an easily accessible place

near your gas red boiler.

Maintenance

6 3062348_0511

Hydraulic connections

Please note before commissioning

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betweenthetapwaterandheating

waterrequiredforllingmustberemovedafterthellhasbeencompleted.Otherwise

thereisariskthatyourtapwaterwillbecontaminatedbyheatingwater.

The system may overheat if the boiler is operated without water.

Inhibitors are not permissible. Otherwise there is a risk of damage to

the boiler.

Filling the system

Note

Theshut-offvalvesforheatingowandheatingreturnmustbeopen.

Opening the shut-off

equipment

Regularly check the system pressure. 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 heating

water

Shut-off valves

(accessory)

Fill and drain connection

Heating return

(incl.llanddrain

connection)

Heating ow

(incl.llanddrain

connection)

Gas ball valve

Open:Pushandturnanti-clockwise

Close:Turnclockwise

Maintenance valve

Heating return

Open

Maintenance valve

Heatingow

Open

3062348_0511 7

Control unit operation

ON/OFFswitch

DHW temperature

selector

Heatingwater

temperature

selector

Resetbutton Thermometer

Pressure

gauge

Illuminated

signalring

Illuminated signal ring as status

indicator

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operates,ameON

Flashingred Fault

Summermode(heatingOFF)

Wintermodeposition2to8

Emissionstestmode

(illuminatedringashesyellow)

DHW temperature selector,

boiler *

1(15°C)...9(65°C)Gasboilerwithcylinder

1(40°C)...9(65°C)Gascombiboiler

Heating water temperature

selector

2(40°C)...8(80°C)

* When the hardness of the water is over 15°d.H. (2.5mol/m³) the cylinder water

temperaturemaybesettoamaximumof55°C.Thiscorrespondswithoutaccessory

controllertoasettingof5-6ontheDHWtemperatureselectorwithgascombiboilers

or6-7ongasboilerswithcylinders.

The BM programming module can also be integrated into the control unit of gas

redboilers.Thatmeansthatalladjustmentsaremadeatthecontrolunitofthegas

red boiler. For installation and operation, see BM programming module operating

instructions.

Note:

8 3062348_0511

Information for energy-efcient

operation

Saving energy with modern heating technology: A Wolf boiler saves you hard

cash.

Withmoderncondensingtechnologyenergyisusedefcientlyforheating.

Use as little electrical energy as possible.

Operatethesystemwiththeheatingpumpatthelowestpossiblelevel.

Regular heating system maintenance pays for itself.

Acontaminatedburnerorpoorlyadjustedgas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energyutilisation.

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accessories,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aheatingoutputthatisnotrequired

byanyone.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 the 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 freely circulate 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.

Heating mode

3062348_0511 9

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 loss viathe

windowareas.Insulatingtheradiatorrecessesandlightcolouredpaintworkcanreduce

yourheatingbillsbyupto4%.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ambient

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willthenbeabletorespond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.

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.

Whenthehardnessofthewaterisover15°d.H.(2.5mol/m³)theDHWtemperature

maybesettoamaximumof55°C.Thiscorrespondswithoutaccessorycontrollertoa

settingof5-6ontheDHWtemperatureselectorwithgascombiboilers,or6-7ongas

boilerswithcylinders.Theactualtemperaturethenfallsbetween50°Cand55°C.

Sensible handling of DHW

Showering consumes only approx. 1/3 of the water volume required for a bath.

Immediatelyrepairanydrippingtaps.

DHW mode

Iftheilluminatedringofthestatusindicatorashesred,wherepossiblereadthefault

codeoftheconnectedcontroller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.

GasboilersfromtheCGU-2seriesareequippedwithanelectronicuegasmonitor.

Ifuegasisescapingatthedraughthoodthisshutsdownthegasboiler.Theboiler

restartsautomaticallyafterapprox.15mins.

Caution - risk of damage, poisoning and suffocation.

Faults / Fault codes

10 3062348_0511

Notes

3062348_0511 11

Notes

Wolf CGU-2K-24, CGG-2-18, CGG-2-24, CGG-2K-18, CGG-2K-24, CGU-2-18, CGU-2-24, CGU-2K-18 Operating Instructions Manual

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