Wolf CGB-50 Installation Instructions 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. 08751/74-0 · Fax 08751/741600 · 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

 CO

2

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(2

nd

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

2

8

3

7

4

6

5

2

8

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

1

3

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.: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/m

3

=45.7-54.7MJ/m

3

LPG P:

Ws=20.2-21.3kWh/m

3

=72.9-76.8MJ/m

3

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

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

Z

A1

N

L1

N

3

MAINS

Netz

Z

A1

N

L1

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

0 N/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.

3 DHW 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.

5 Flame 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

L1

1 2

E1

a

b

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Wolf CGB-50 Installation Instructions Manual

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Wolf CGB-50 Installation Instructions Manual

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