Wolf CGB-35 User manual

Installation instructions
Gas red condensing boilers
CGB-35 Boiler
CGB-50 Boiler
Document no.: 3061490_0709Subjecttotechnicalmodications. GB
Wolf GmbH · Postfach 1380 · 84048 Mainburg · Tel. [phone] · Fax [phone] · Internet: www.wolf-heiztechnik.de

2 3061490_0709
Index
Index ..............................................................................................................................................................Page
Safetyinstructions ................................................................................................................................................. 3
Standardsandregulations..................................................................................................................................4-5
Controlunit/Function/Operation.....................................................................................................................6-7
Deliveredcondition/Standarddelivery................................................................................................................. 8
Layout.................................................................................................................................................................... 9
Positioninginformation ........................................................................................................................................ 10
Assembly............................................................................................................................................................. 11
Dimensions/Installationdimensions .................................................................................................................. 12
Installation ......................................................................................................................................................13-16
 Installationofabalanceduesystem ....................................................................................................... 17
 Powersupply........................................................................................................................................18-21
 Fillingthesiphon ....................................................................................................................................... 22
 Fillingthesystem....................................................................................................................................... 23
 Checkingthegassupplypressure .......................................................................................................24-25
 Commissioning.......................................................................................................................................... 26
 SettingtheBUSaddress........................................................................................................................... 27
 Displaying/modifyingcontrolparameters .................................................................................................. 28
 Adjustingthemodulatingpump................................................................................................................. 29
 Limitingthemaximumoutput .................................................................................................................... 30
 Testingthecombustionparameters .......................................................................................................... 31
 CO2settings .........................................................................................................................................32-33
 Commissioningreport ............................................................................................................................... 34
Technicalconversionoptionsofthisgasredcondensingboiler........................................................................ 35
Maintenance(seemaintenanceinstructionssupplied)
Technicalmaintenanceanddesigninformation..............................................................................................36-37
Designinformation-balanceduesystem.....................................................................................................38-48
Designinformation-hydraulics ......................................................................................................................49-53
Wiringdiagram .................................................................................................................................................... 54
Specication ........................................................................................................................................................ 55
Troubleshooting................................................................................................................................................... 56
Notes .............................................................................................................................................................57-59
ECdeclarationofconformity ............................................................................................................................... 60

33061490_0709
Fig.:Terminalbox:Dangerfromelectricpower
Fig.:Ignitiontransformer,highvoltageignitionelectrode,
combustionchamber
Risk through 'live' electrical components,
risk of burning from hot components
Fig.:Gascombinationvalve
Danger from electric power
Escaping gas may cause poisoning or the risk of explo-
sion
Fig.:Gasconnection
Escaping gas may cause poisoning or the risk of explo-
sion
Safety instructions
The following symbols are used in conjunction with
these important instructions concerning personal
safety, as well as technical reliability.
"Safety instructions" are instructions with
which you must comply exactly, to prevent
injury and material losses.
Danger through 'live' electrical compon-
ents.
Please note: Switch OFF the ON/OFF
switch before removing the casing.
Never touch electrical components or con-
tacts 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 po-
sition.
This indicates technical instructions which
you must observe to prevent material losses
and boiler malfunctions.
NB

4 3061490_0709
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 re-
cognised 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
observedduringinstallation:
- DIN EN 12828
 Heating systems in buildings, designing hot water
heatingsystems
- VDE0722/EN50165
 Electrical equipment of heat generators with non-
electricalheatingsystems.
- EN 60335-1
 Safetyofelectricalequipmentfordomesticuseand
similarpurposes
- VDE0470/EN60529
 Protectionthroughhousings
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.
Any damage or loss resulting from technical
modications to the control unit or to the
control components are excluded from our
liability.
Incorrect use can lead to a risk to life and
limb or to a risk of material losses.
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)Regulations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
exceeding 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
domestic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 installation.
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)!

53061490_0709
Fig.:Wolfgasredcondensingboiler
Open ue gas red condensing boilers
must only be installed in a room which
complies with the appropriate ventilation
requirements. Otherwise there is a risk of
asphyxiation and poisoning. 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.
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).
Standards and regulations
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),
73/23/EEC (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.

6 3061490_0709
Control unit / Function / Operation
ON/OFFswitch DHWtemperature
selector
Pressuregauge
Resetbutton
Heatingwatertem-
peratureselector
ON/OFF switch
ThegasredboilerisOFFinposition0.
Illuminatedring
Thermometer
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.
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
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
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
thermostat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.
0
I
9
1
28
37
46
5
28
3
7
4
6
5

73061490_0709
Control unit / Function / Operation
Setting
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.
Insummermode,thecirculationpumpoperatesforapprox.30secondsaftera
maximumidleperiodof24hours.
Anti-seizing
pump protection
Note: The number of times the gas boiler can be started in heating mode is limited
electronically.Thislimitcanbebypassedbypressingtheresetbutton.Then,the
equipmentstartsimmediately,assoonasaheatingdemandispresent.
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hea-
ting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 .
Summer mode
Wintermodeisdeactivated by rotatingtheheatingwatertemperatureselector
intoposition .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.
Wintermode(position2to8)
Inwintermode,theboilerheatstothetemperatureselectedattheheatingwater
thermostat.Accordingtothepumpoperatingmode,thecirculationpumpopera-
tesconstantly(factorysetting)oronlyinparallelwiththeburneractivation/run-on
time.
°C
bar
2
13
120 0
4
0
60
3090

8 3061490_0709
Siphon
Delivered condition / Standard delivery
As delivered condition
Gas red condensing boiler
Thestandarddeliverycomprises:
 1 Gasredcondensingboiler,fullywired, 
  includingcasing
 1 Safetyvalve,centralheatingside
 1 Expansionvesselconnection
 1 Wallmountingbracket
 1 Installationinstructions
 1 Operatinginstructions
 1 Maintenanceinstructions
Accessories
Thefollowingaccessoriesarerequiredfortheinstallation
ofthisgasredcondensingboiler:
- Balancedueaccessories
 (seedesigninformation)
- Roomtemperature-dependentor
 weather-compensatedcontrolunit
- Condensatedrainoutletwithhoseretainer
- Maintenanceshut-offvalvesfor
 primaryowandreturn
- Gasballvalvewithreprotectionfacility
Additionalaccessoriesinaccordancewiththepricelist.
Werecommend:
- Blow-downfacility/lter
- Airseparator
Connections
Heatingow
G 1¼“

Gasconnection
R¾“

Expansionves-
selconnection
Heatingreturn
G 1¼“

Safety valve
Fig.: Connectionswithheatingcircuitconnectionset(accessories)

93061490_0709
CGB-35 / CGB-50
Layout
Quick-actingairventvalve
Fan motor
Gasfan
Temperaturelimiter
Flow
Burner
Heatingwaterheatexch.
Gasrestrictor
Condensatesiphon Gascombinationvalve
Heatingow
Gassupplypipe
Gas:airmixingchamber
Fluegassensor
Ionisationchamberhousing
Fluepipe
Heatingcircuitpump
(autoventing)
Overowvalve
Heatingreturn
Returnsensor
Temperaturelimiter
Combustionchamber
Intermediateangewith
non-returnvalve
Safety valve
plug-intype
Connection
Expansionvessel
Flowsensor
Ignitionandmonitoring
electrodes
Powercable
Insulatingring
Displacerbody

10 3061490_0709
Initially,determinethelocationfortheboilerinstallation.
Inyourdeliberations,considertheuegasoutlet,the
lateralclearancestowardswallsandceilingsandany
existingconnectionsforgas,centralheating,DHWand
electrics.
Clearance between the boiler and com-
bustible 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.
Positioning
TheCGBwallmountedgasredcondensingboileris
suppliedfullywiredtoapowersupplyplug.
Aclearanceof400mmtotheceilingisrecommendedto
enableinspectionandmaintenanceworkontheboiler
to be carried out, otherwise adequate inspection and
functiontestsoncomponentscannotbeensuredduring
maintenance.Securethedrainhosessafelywiththeir
retainingplateabovethedrainoutlet(siphon).Thedrain
shouldbeabletobeinspectedeasily.
Thegasredboilermayonlybeinstalledinroomswhich
areprotectedfromfrost.
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 unfavourable con-
ditions, 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 re-
sult. Use the enclosed polystyrene cover.
NB Soundinsulation: In critical installationlocations (e.g.
installation on a dry lining wall), additional measures
to protect the equipment against the transmission of
structure-borne vibrations may be required. In such
cases,useanti-vibrationrawlplugsandpossiblyrubber
mountsorinsulatingstrips.

113061490_0709
Assembly
- Marktheholestobedrilled(Ø12mm)forthemoun-
ting 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
Fig.:Fixingholesforthemountingbracket
Min. 662 mm
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connectionsforgas,centralheating,DHWand
electrics.
Mounting the boiler with a mounting bra-
cket
Opening the casing lid
L.h.rotatinglockingscrew R.h.rotatinglockingscrew
Fig.:Opentherotatinglockingscrews
Werecommendyouremovethecasinglidduringins-
tallation.
- Pivotthecontrolunitliddown.
- Unlock the casing lid with the l.h. and r.h. rotating
lockingscrew.
- Releasethelowerpartofthecasinglidandunhook
atthetop.
Note: WhenreplacinganexistingTGB-40orTGB-
60boiler,tthenewmountingbracket11mm
lower.
During the boiler installation ensure that
the fixing components are sufficiently
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.

12 3061490_0709
Dimensions / Installation dimensions
CGB
Fig.:Dimensions
Fig.:Dimensions
Fig.:Connections
1 Heatingow
2 Gasconnection
3 Heatingreturn
4 Condensatedrain

133061490_0709
Installation
Heating circuit connection set
Fig.:Heatingcircuitconnectionset(accessory)
Werecommendyouconnecttheheatingsystemwith
theaidofaheatingcircuitconnectionset.
Connectionsetcomprising:
Boiler connection with at packing; connection to the
heating ow and return with ball valves 1" (fem. th-
read).
Notes:
Provide a fill and drain cock at the lowest system
point.
TheTGB-35andTGB-50arenotfactory-ttedwithan
expansionvessel.Therefore,installanexpansionvessel
onsite(availableasWOLFaccessory).
Never install between the expansion vessel
and the condensing boiler, otherwise the
boiler will suffer permanent damage as
soon as the pressure builds during heat-
up. System components may burst, which
would result in a risk of scalding.
An exception would be cap valves upstream of the
expansionvessel.
Thereisnofactory-ttedsafetyvalve.Routetheblow-
offlineintoadrainfunnel.Minimumsystempressure
0.75bar.
CGB-35 and CGB-50 are approved exclusively for
sealedsystemsupto3bar.Themaximumowtempe-
ratureisfactory-setto75°Candmaybeadjustedto85
°C,ifrequired.Theexpansionvesselmustbeadequately
sizedinaccordancewithDIN4708.
Safety equipment
Fig.:Safetyvalve,expansionvesselconnection
Expansionvesselconnection
Safety valve
Click the control unit into position
Thecontrolunitcanbepivotedintoapositionofapprox.
180°forbetteraccessduringworkbehindtheunit.

14 3061490_0709
Installation
Information regarding scaling
Thebuild-upofscalecanbesubstantiallyinuencedby
thewaythesystemiscommissioned.Whenthesystem
isheatedupatlowloadsorslowlystepbystep,calcium
cansettle,notonlyonthehottestparts,butalsooverthe
entiresystem,maybeevenassludge.Formulti-boiler
systemsitisrecommendedthatallboilersarestarted
simultaneously,whichpreventsacalciumconcentration
overtheheattransfersurfaceofasingleboiler.
Ifappropriate,startwiththescreeddryingprogram.
Heating water
Onlyuseuntreatedtapwaterasllortopupwaterfor
heatingsystems.
Chemicaladditivesorwaterfromanionexchangerare
notpermissible.
Thoroughlyushtheheatingsystempriortollingwith
water.
Dirt trap
Installthedirttrapforallsystemsonsiteinthereturn
pipetoprotecttheboilerandpumpfromcoarsedirtand
sediments.
Sludge separator
Installasludgeseparatorupstreamoftheboilerinthe
returnpipeofalloldersystemswhicharepredominantly
equippedwithsteelpipework.
Air separator
An additional air separator can be installed in larger
systems.
ForCGB-35,themaximumpermissibleowrateis2000
l/hand2800l/hfortheCGB-50;therefore,neverinstall
anadditionalpump.
Whenusingpipeswhicharepermeabletooxygen,e.g.
underoorheatingsystems,providesystemseparation
by using a heat exchanger. Unsuitable heating water
increasestheriskofsludgeformationandcorrosion.This
mayleadtofaultsandheatexchangerdamage.

153061490_0709
Condensate connection
Connectthesuppliedsealedsiphontotheconnectoron
thecondensatesump.
Note: Fill the siphon with water, prior to commissio-
ning
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,en-
sureventilation,sothatthepublicsewercannotaffect
thecondensingboiler.
Fig.:Siphon
Siphon
Tab
Fig.:Pushinthetab
Observetherelevantinstructionsifyouinstallaneutra-
lisingsystem(accessory).
Fig.:Neutralisingsystem(accessory)
Installation
Connection of a 200 litre Wolf DHW cylin-
der or third party cylinder
Connect the DHW ow and return with a three-way
divertervalveorthereturnpipeofthegasredboiler.
UseaDHWsensorfromtheWolfaccessoryrangewhen
connecting a DHW cylinder made by third parties.A
detaileddescriptionisincludedwiththeconnectionset
(accessories).
Check all water connections for possible
leaks, prior to commissioning:
Test pressure (DHW side): max. 10 bar
Test pressure (heating water side): max.
4.5 bar.
If the system leaks, water may seep out,
resulting in material losses.
NB

16 3061490_0709
Installation
Gas connection
Fig.:
Gasshut-offvalve
angledversion(accessories)
Fig.:
Gasshut-offvalve
straightversion(accessories)
Laying the gas pipe as well as gas con-
nections 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 pipe-
work 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 unsui-
table components or assemblies may lead
to gas escaping, which results in a risk of
poisoning and explosion.
Install a gas shut-off valve with re pro-
tection in the gas supply line upstream
of the Wolf gas red boiler. Otherwise ex-
plosions may occur during a re. Size the
gas supply line in accordance with current
regulations.
Gas ttings on the gas burner may be pres-
sure tested to 150 mbar. Higher pressure
may damage the gas burner tting, resul-
ting 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.
Install the gas ball valve in an easily acces-
sible position.
Priortoinstallation,ensurethattheboilercorresponds
tothetypeofgasavailable.Seethetableoppositefor
factorysettingssubjecttogastype.
Table:Factorysettingssubjecttogastype
Natural gas H:
Ws=12.7-15.2kWh/m3=45.7-54.7MJ/m3
LPG P:
Ws=20.2-21.3kWh/m3=72.9-76.8MJ/m3

173061490_0709
Installation of a balanced ue system
Fig.:Example:Balanceduesystem
With low outside temperatures the water
vapour contained in the ue gas may con-
dense on the balanced ue pipe and freeze.
Prevent ice from falling through on-site
measures, e.g. the installation of a snow
catcher grille.
To avoid the air supply and the expelled
ue gas and/or ventilation inuencing each
other above the roof, we recommend you
maintain a minimum distance of 2.5 m bet-
ween the air inlet and ue terminal.
Also take the Technical Guide into consi-
deration.
For concentric air/flue pipes (balanced
ue systems), use only original Wolf com-
ponents.
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thatyoucon-
tacttheappropriateauthoritiestochecklocal
requirements.
The ue gas test ports must remain acces-
sible to the relevant authorities, even after
tting the ceiling bezels.
NB
NB
NB

18 3061490_0709
Power supply
Terminal box
Thecontrol,regulatingandsafetyequipmentarefully
wiredandtested.
Theboilerisfactory-ttedwithasafetyplug.
Mains electrical connection
Thesystemisconnectedtothepowersupplysystem
byasafetyplug.
Ifthesystemisconnectedtothepowersupplyinthepro-
ximityofabathorashower(protectionareas1and2),
replacethesafetyplugwithapermanentconnection.
Terminalbox
Strainrelief
F3.15A
Rast-5plugs
General notes
The installation must be carried out by a
licensed electrical contractor. Observe
local regulations and those of the power
supply company.
The power supply terminals are 'live' even
when the ON/OFF switch has been swit-
ched OFF.
Powersupply
230VAC/50Hz
Powersupply,ext.accessories
230VAC/50Hz/max.300VA
Programmable
output
230VAC/50Hz
Programma-
bleinput
zerovolt
Outside
temp.
sensor
Data BUS
(controller,radioclock,AFwith
radioclock,receiver,outside
radiosensor)
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insu-
lation.
- Pushthecablethroughthestrainreliefandsecure
thestrainrelief.
- PulltheRast-5plugs.
- Terminate the appropriate cores at the Rast-5
plugs.
- Pushtheinsertsbackintotheterminalboxcasing.
- PushtheRast-5plugsbackinto their correct posi-
tions.

193061490_0709
Power supply
Isolate the condensing boiler from the pow-
er 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 compo-
nents. Never touch electrical components
or contacts as long as the condensing
boiler has not been isolated from the power
supply.
Risk to life!
Changing a fuse
Fig.:Pivotthecontrolunitforward;terminalboxcoveropen
Fuse
Fig.:ConnectionoutputA1
Fig.:Blueplug,cylindersensorconnection
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.
Blueplug
Fig.:ConnectionDHWcirculationpump/externalaccesso-
ries
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 .
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.
Netz
ZA1
N
N
N
L1
L1 L1
L1 L1
L1 NN
N
3
MAINS
Netz
ZA1
N
N
N
L1
L1 L1
L1 L1
L1 NN
N
3
MAINS

20 3061490_0709
Power supply
ThefunctionsofoutputA1canbescannedandadjustedwithWolfcontrolaccessorieswitheBUScapability.
ThefollowingfunctionscanbeallocatedtooutputA1:
Code Explanation
0N/A
NoactivationofoutputA1
1 DHW circulation pump 100%
Controller(e.g.BM)activateoutputA1whenDHWisenabled.
OutputA1isconstantlyactivatedwhennocontrollerisinstalled.
2 DHW circulation pump 50%
Controller (e.g. BM) cycles output A1, when DHW is enabled. 5 minutes ON and 5 minutes OFF.
OutputA1iscycledconstantlyin5minuteintervalswhennocontrollerisinstalled.
3DHW circulation pump 20%
Controller (e.g. BM) cycles output A1, when DHW is enabled. 2 minutes ON and 8 minutes OFF.
OutputA1iscycledconstantlywhennocontrollerisinstalled.
4 Alarm output
OutputA1isactivatedafterafaultandexpiryof4minutes.
5Flame transmitter
OutputA1isactivatedafteraamehasbeenrecognised.
6 Cylinder primary pump(onlyforcentralheatingboilers)(factorysettingforA1)
OutputA1isactivatedwhenthecylinderisheatedup.
7 Ventilation damper
OutputA1isactivatedbeforeeachburnerstart.Theburnerwill,however,onlybeenabledafterinputE1
hasbeenclosed.
Important: Inanycase,inputE1mustalsobe
  programmedas„Ventilationdamper“!
ThefeedbacktoinputE1mustbemadewithazerovoltcontact(24V).Otherwise,useanon-siterelay
forpotentialseparation.
8 External ventilation
OutputA1isactivatedinvertedtothegascombinationvalve.
Switchingoffexternalventilationequipment(e.g.extractorfan)duringburneroperationisonlyrequired,if
theboilerisoperatedasopenuesystem.
9 External LPG valve
OutputA1isactivatedinparalleltothegascombinationvalve.
10 External pump
OutputA1switchessynchronouslywiththeheatingcircuitpump(HKP).Usewith,forexample,system
separation.
M
24V230VAC
A1
N N
L1 L1
1 2
E1
ab