Wolf MGK-170 Technical Manual And Installation Instructions

Brand: Wolf

Model: MGK-170

Type: Technical Manual And Installation Instructions

This manual is also suitable for

Technical guide and

installation instructions

Gas condensing boilers

MGK-130

MGK-170

MGK-210

MGK-250

MGK-300

Document no. 3062880_0910 Subjecttotechnicalmodications

These installation instructions are to be retained by the user.

We cannot accept any warranty claims if these operating instructions have not been

observed.

Wolf GmbH · Postfach 1380 · D-84048 Mainburg · Tel. +49-8751/74-0 · Fax +49-8751/741600 · Internet: www.wolf-heiztechnik.de

3062880_0910

Contents

Contents ................................................................................................. Page

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

Standardsandregulations...........................................................................4-5

Layout MGK....................................................................................................5

Specication ...................................................................................................6

Control/Function/Operation .....................................................................7-8

Deliveredcondition/Connections ..................................................................9

Installationinstructions/Dimensions ...................................................... 10-11

Dismantling,casing ......................................................................................12

Boilersystempipework.................................................................................13

Installation ...............................................................................................14-16

Installation,combustionairsupply/uesystem ..........................................17

Electricalconnection................................................................................17-21

Fillingthesystem/llingthesiphon .............................................................22

Checkingthegassupplypressure ...............................................................23

Commissioning/SettingtheBUSaddress...................................................24

Displaying/modifyingcontrolparameters....................................................25

Limitingthemaximumoutput........................................................................26

Changingthegastype/CO

settings ......................................................27-29

Testingthecombustionparameters..............................................................30

Commissioningreport...................................................................................31

Technicalinformation,watertreatment .........................................................32

Systemlog ....................................................................................................33

Engineeringdata ..........................................................................................34

Functiondescription/Systemengineering..............................................35-36

Technicalinformation,connectiononthewaterside ....................................37

Engineeringinformation,combustionair/uegasrouting......................38-44

WiringdiagramMGK-130 .............................................................................45

WiringdiagramMGK-170-300 ......................................................................46

Troubleshooting ............................................................................................47

Resistancetable ...........................................................................................48

Keywordindex .........................................................................................49-51

ECdeclarationofconformity ........................................................................52

3062880_0910

The following symbols and references are used

in conjunction with these important instructions

concerning personal safety, as well as operational

reliability.

"Safety instructions" are instructions with

which you must comply exactly, to prevent

risks and injuries to individuals and material

losses on the boiler.

Danger from 'live' electrical components!

NB: Switch OFF the ON/OFF switch

before removing the casing.

Never touch electrical components or

contacts when the ON/OFF switch is in

the ON position! This results in a risk of

electrocution that may lead to injury or

death.

The main supply terminals are 'live' even

when the ON/OFF switch is in the OFF

position.

"NB" indicates technical instructions that

you must observe to prevent material losses

and malfunctions on the boiler.

Safety instructions

Fig.:GascombinationvalveMGK-170/210/250/300

Dangerfromelectricalvoltage

Escapinggasmaycausepoisoningortheriskofexplosion

Fig.:Ignitiontransformer,highvoltageignitionelectrode,

combustionchamber

Dangerfrom'live'electricalcomponents,riskofburning

throughhotcomponents

Fig.:JunctionboxMGK-170/210/250/300

Dangerfromelectricalvoltage

3062880_0910

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.

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: Specification 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

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)!

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.

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recognised

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:

- VDE0722/EN50165 El ectrica l  equip m e nt of  heat

generators with non-electrical

heatingsystems

- DINEN12828 Heating systems in buildings,

de s ign i ng  hot  wat e r he ati n g

systems

-EN60335-1 Safety of electrical equipment for

domesticuseandsimilarpurposes

- VDE0470/EN60529Protectionthroughhousings

- EN12831 Methodforcalculationofthedesign

heat load

- EN13384 Chimneys - Thermal and fluid

dynamic calculation method

Standards and regulations

3062880_0910

Gas condensing boiler MGK-...

GascondensingboilersaccordingtoEN437/EN483

/ EN 677 and EU 90/396/EEC (Gas Consumer

Equipment), 92/42/EEC (Efficiency Directive),

2006/95/EC(LowVoltageDirective),and2004/108/EC

(EMCDirective),withelectronicignitionandelectronic

ue gas temperature monitoring, for low temperature

heatingandDHWheatinginheatingsystemswithow

temperaturesupto90°Cand6barpermissiblepressure

accordingtoEN12828.

Standards and regulations /

Layout MGK

Open flue g as c onde nsing bo ilers

must only be installed in a room which

complies with the appropriate ventilation

requirements. Otherwise there is a risk

of asphyxiation or poisoning. Read these

installation and maintenance instructions

before installing the boiler. Also take the

technical engineering information into

consideration.

Fig.:Wolfgascondensingboiler

Flueoutletwithtest

nipple

Heatexchangeras

asectionaldesign

Flowconnection

Returnconnection

High limit safety cut-out

insidethesensorwell

Gasconnection

Ignitionelectrode

Ionisationelectrode

Gasfan

Mixingchamber

Cylinderburner

Flowsensor

Gascombinationvalve

withgaspressurelimiter

Returnsensor

Waterpressureswitch

Ventilationpipe

Drainvalve

Siphon

Fluegas

temperatureswitch

Flue gas pressure

switch

Ventilationair

aperture

Layout MGK

3062880_0910

Specication

Type MGK 130 170 210 250 300

Ratedoutputat80/60°C kW 117 156 194 233 275

Ratedoutputat50/30°C kW 126 167 208 250 294

Rated heat input kW 120 160 200 240 280

Lowboileroutput(modul.)at80/60°C kW 23 27 34 39 45

Lowboileroutput(modul.)at50/30°C kW 24 30 37 44 49

Lowheatinput(modulating) kW 23 28 35 41 46

Heatinputmodulationrange % 19-100 17-100 17-100 17-100 17-100

Height A mm 1300 1300 1300 1300 1300

Width B mm 995 1355 1355 1355 1355

Depth C mm 600 600 600 600 600

Fluediameter mm 160 160 160 160 200

Combustionairsupply mm 160 160 160 160 160

Heatingowoutsidediameter G 1½" 2" 2" 2" 2"

Heatingreturnoutsidediameter G 1½" 2" 2" 2" 2"

Gasconnection R 1" 1½" 1½" 1½" 1½"

Balanceduerouting Type

B23,B33

C33,C43

C53,C63

C83

B23,B33

C33,C43

C53,C63

C83

B23,B33

C33,C43

C53,C63

C83

B23,B33

C33,C43

C53,C63

C83

B23,B33

C33,C43

C53,C63

C83

Gascategory II

2H3P

Gassupplydetails:

Naturalgas H(H

=9.5kWh/m³=34.2MJ/m³)

m³/h 13.1 16.8 21 25.2 29.4

LPGP(H

=12.8kWh/kg=46.1MJ/kg)

kg/h 9.7 12.5 15.6 18.7 21.8

Gassupplypressure: NaturalgasE/LL mbar 20 20 20 20 20

 LPGP mbar 50 50 50 50 50

Watercapacity,heatingwaterheatexchanger l 12 15.4 16 20 22

Max.permissibleboilerpressure bar 6 6 6 6 6

Max.permissibleowtemperature °C 90 90 90 90 90

Availablegasfandraught Pa 10-200 10-150 10-150 10-150 10-150

Fluegastemperature80/60-50/30atQ

max

°C 65-45 65-45 65-45 65-45 65-45

Fluegastemperature80/60-50/30atQ

min

°C 55-35 55-35 55-35 55-35 55-35

Fluegasmassowrate

g/s 56.7 72.6 90.8 108.9 127.1

FluegasgroupaccordingtoDVGWG635 G52 G52 G52 G52 G52

Pressuredrop,heatingwater mbar 95 100 115 135 160

Electricalconnection V~/Hz 230/50 230/50 230/50 230/50 230/50

Integralfuse(mediumslow) A 5 5 5 5 5

Powerconsumption W 30-200 45-280 45-280 45-280 45-280

Protection

IP40D IP40D IP40D IP40D IP40D

Soundpressurelevelinsidetheinstallation

roomatfullload

dB(A) <54 <54 <54 <54 <54

Totalweight(dry) kg 195 250 271 292 313

Condensatevolumeat40/30°C l/h 12 16 20 24 28

CondensatepHvalue approx.4.0 approx.4.0 approx.4.0 approx.4.0 approx.4.0

CE ID 0085BR0117 0063BQ3805 0063BQ3805 0063BQ3805 0063BQ3805

Thisvalueisdependentonthegeneralsystemconditions,suchas:Type/versionoftheuesystem,sizeandnatureoftheinstallationroom

3062880_0910

Control / Function / Operation

ON/OFF switch

ThecondensingboilerisOFFinposition0.

ON/OFFswitch

DHWtemperature

selector

Reset

button

Heatingwater

temperatureselector

Illuminatedring

Thermometer

Reset

Afaultisresetbypressingtheresetbuttonwhichwillalsorestartthesystem.

Pressingtheresetbuttonre-activatesthesystem,iftherewasnofault.

Illuminated status indicator ring

DHW temperature selection (onlywith3-wayvalve)

WhengascondensingboilersarecombinedwithaDHWcylinder,setting1-9

corresponds to a cylinder temperature of 15-65 °C.The DHW temperature

selectorsettingbecomesineffectivewhenthesystemiscombinedwithadigital

roomthermostatoraweather-compensatedcontroller.Thetemperaturewill

thenbeselectedatthecontroller(accessory).

Heating water temperature selection

Settings2-8correspond,whenfactory-set,toaheatingwatertemperatureof

20-85°C.Theheatingwaterthermostatsettingbecomesineffectivewhenthe

systemiscombinedwithadigitalroomthermostatoraweather-compensated

controller.

Display Explanation

Flashing

green

Standby

(powersupplyON,noheatdemand)

Constant

greenlight

Heatdemand:Pumprunning;

burnerOFF

Flashing

yellow

Emissionstestmode

Constant

yellowlight

BurnerON;amesteady

Flashingred Fault

3062880_0910

Control / Function / Operation

Settings

Anti-seizing pump protection

In summer mode, any connected circulation pump operates for approx. 30

secondsafteramaximumidleperiodof24hours.

Note:

Thenumberoftimesthecondensingboilercanbestartedinheatingmodeis

limitedelectronically.Thislimitcanbebypassedbypressingtheresetbutton.

Then, the boiler starts immediately, as soon as a heat demand has been

Winter mode(position2to8)

Inwintermode,theboilerheatstheheatingwatertothetemperatureselected

atthe heating watercontroller.According to thepump operating mode,the

circulationpumpoperatesconstantly(factorysetting)oronlyinparallelwith

theburneractivation/run-onperiod.

Summer mode

Wintermodeis disabledbyrotating theheatingwater temperatureselector

intoposition .Inotherwords,theboilerwillthenoperateinsummermode.

Summermode(heatingOFF)meansonlyDHWheating.Frostprotectionforthe

heatingsystemandpumpanti-seizingprotection,however,remainenabled.

Thermometer

Thecurrentheatingowtemperatureisdisplayed.

°C

0 120

bar

Emissions test mode

Theemissionstestmodeisactivatedbyrotatingtheheatingwatertemperature

selectorintoposition

.Theindicatorringashesyellow.Aftertheemissions

testmodehasbeenactivated,theboilerwillheatwiththesetmaximum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.

Toreactivate,turntheheatingwatertemperatureselectoranti-clockwiseand

thenbackintoposition

3062880_0910

Delivered condition / Connections

Delivered condition

Thestandarddeliveryincludes:

 1 Gascondensingboiler,fullywired

 1 Technicalguideandinstallationinstructions

 1 Operatinginstructions

 4 Liftingslings

Connections

Flueoutletwith

integraltestnipple

Ø160/Ø200

HeatingreturnHeatingow

Gasconnection

Combu stion  air

supply*Ø160

Cableinlet24V

Powercableinlet230V

Condensatedrain

connection

Condensatedrain

connection(optional)

Grommet

Condensatehose

*Connectionforbalancedueoperationwithventilationairadaptor(accessory)

3062880_0910

Recommended minimum wall clearances

Theboilercanbepositionedclosetothewall,bothat

itsbackanditsleftside.

On the right side, a clearance of at least 500 mm is

requiredtoenabletheburnerremovalandinstallation.

Anadequateamountofspacemustalsobeprovidedin

frontoftheboilertoenablecleaningandservice.

Installation instructions

General tips regarding location

• Theboilershouldbeinstalledonalevelsurfacewhich

issubstantialenoughtocarryitsweight.

• Theboilermustbelevel(levelwithadjustablefeet).

Theboilermustonlybeinstalledinaroomthat

isprotectedfromfrost.

Draintheboilerandtheentireheatingsystemif

thereisariskoffrost,whenthesystemhasbeen

shutdown,topreventpipesfrombursting.

Boilersshouldnotbeinstalledinareassubject

to aggressive vapours, very dusty or highly

humidconditions(workshops,laundryrooms,

hobbyroomsetc.).Thispreventstheoptimum

burnerfunctionfrombeingachieved.

Thecombustionairsuppliedtotheboilermust

befreefromhalogenatedhydrocarbons(e.g.

as contained in sprays, solvents, cleaning

uids,paintsandadhesives).Underthemost

unfavourable conditions, these may lead to

pitting of the boiler and even the ue gas

system.

Never store or use combustible material or

liquidsneartheboiler.

The ventilation air supply must be ensured

and comply with local regulations or those

relating to gas installations. When there is

an insufcient supply of ventilation air, ue

gas can escape leading to a risk to life

(poisoning/asphyxiation).

Prior to commissioning, ensure with the

appropriateauthorities,whetheraneutralising

systemforcondensateisrequired.

2boilersintheinstallationroom,backtoback

2boilersintheinstallationroom

2-4boilersintheinstallationroom,sidebyside

Boilerintheinstallationroom

Dim. B MGK-130 995 mm

Dim. B MGK-170/210/250/300 1355 mm

3062880_0910

Installation information / Dimensions

Levelling the boiler with the adjustable feet

Atthefactorytheboilerisequippedwithfouradjustable

feet.

• Leveltheboilerwiththeadjustablefeet,spannersize

13).

Fig.:Feet

Fig.:Liftingeyesforliftingslings

Liftingeyesforliftingslings

Transportation into the installation room

Toeasethe transportationintothe boilerroom,lifting

slingsaresuppliedwiththeboiler.

Neverusesacktrucks.

Dimensions

Fig.:Connectiondimensions

MGK-130

MGK-170/210/250/300

Fig.:Dimensions

 (Totalheightincl.connector

MGK-130 ... 250 = 1460 mm

 MGK-300=1510mm)

3062880_0910

Dismantling, casing

Dismantling the casing

Fig.:Dismantlingthefrontandsidecasing

3062880_0910

Boiler system pipework

Heating system ow and return are at the top of the

boiler. For connections,see Fig.Always provide shut

offvalvesfortheowandthereturn.

Installacheckvalvedownstreamoftheheatingcircuit

pump(s)topreventincorrectcirculation.

Fornewsystems werecommendthe installationofa

blow-downtank(alternativelyadirtlter)intothereturn.

Foroldersystemsthisinstallationiscompulsory.

Installasafetyassemblycomprisingasafety

valve with a response pressure of 6 bar, a

pressure gauge and an automatic air vent

valve.

The line between the boiler and the safety

valvemustnotbeabletobeshutoff.Severely

excessive boiler pressure due to excessive

boilerwatertemperatures,canbursttheboiler

body or the boiler pipework, which would

leadtoasuddenescapeofhotwater(risk of

scalding).

Heatingreturn

Heatingow

Fig.:Heatingconnections

Providesystemseparationbymeansofaheat

exchanger, when using pipes which are not

impermeabletooxygen.

Thisboilerisonlysuitableforheatingsystems

with pumped heating circuits. If no heating

circuit pump has been installed, sufcient

circulation through the radiators cannot be

ensured,sothattheroomheatingcannotbe

guaranteed.

The MGK is supplied without circulation pump. The

pump rate of the pump to be installed on site must

be determined subject to the system and boiler

pressure drop. Switching via the MGK (see electrical

connections).

3062880_0910

Installation

Theminimumsystempressureis1.0bar.

Thegascondensingboilersareapprovedexclusivelyfor

sealedunventedsystemsupto6bar.Themaximumow

temperatureisfactory-setto85°Candmaybeadjusted

to90°Cifrequired.Generally,theowtemperatureis

80°CforDHWoperation.

Thereisnoneedforaminimumthroughputatmaximum

owtemperaturesbelow85°C.

Safety equipment

Information on scaling

Scalingcanbestronglyinuencedparticularlythrough

themethodofcommissioning.Heatthesystematthe

lowestoutputwithanevenandadequatethroughput.For

multi-boilersystemsitisrecommendedtocommission

allboilerssimultaneouslytopreventtheoverallamount

oflimeconcentratingontheheatexchangersurfaceof

anindividualboiler.

Note:

Provideadrain&llvalveatthelowestsystempoint.

Before commissioning, all hydraulic pipes

must undergo a tightness test:

Test pressure on heating water side max. 9

bar.

Domestichotwatermaybeusedasllwaterandtop-

upwater.

Thoroughlyushthesystempriortollingwithwater.

Theuseofchemicaladditivesandsofteningusingsingle-

stageionexchangersisnotpermissible.

The design information for water treatment

must be observed, otherwise system damage

due to water leaks may occur.

Wolfdoesnotassumeliabilityfor anydamage tothe

heat exchanger caused by oxygen diffusion in the

heatingwater. Intheevent ofoxygenpenetrating the

system,we recommenda systemseparation through

theinterconnectionofaheatexchanger.

Inthecaseofsystemswithlargevolumesofwaterand

thosewherelargevolumesoftop-upwater(e.g.through

waterlosses)arerequired,observetherelevantlocal

regulationsregardingthepreventionofdamageinhot

waterheatingsystemsthroughscalingandcorrosion.

Keep a system log (see technical information

regarding water treatment and commissioning

report).

Note:

Check with Wolf regarding suitable water treatment

measures.

Heating water

3062880_0910

Installation

Fig.:Siphon

Siphon

Condensate connection

Fillthesiphonwithwaterpriortocommissioning.

Otherwisethereisariskofuegasescaping.

Whenroutingcondensateintothepublicsewersystem,

observelocalregulations.Ifcondensateisdirectlyrouted

tothepublicsewer,ensureventilation,sothatthepublic

sewercannotaffectthecondensingboiler.

Use only plastic for all condensate drain

pipes.

Neutralising system (accessory)

Theneutralisingsystemcanbeconnecteddirectlytothe

appliance.Consumptionapprox.10-30g/kWp.a.

Observetheassociatedinstructions.

Trim the connection hoses, so that

- the condensate can drain fully

- backup loops are prevented

- a perfect seal is ensured.

Fig.:Neutralisingsystem(accessory)

Condensate drain, single boiler systems

WheninstallingtheMGKasanindividualappliance,ta

condensatedrain(DN160-partno.2651341,DN200

-partno.2651389).

Theconnectionsofthecondensatesourcecanbejoined

withthe"Condensatehoseset"(partno.8905844)and

canbeconnectedtotheneutralisingsystem.

Fig.:Condensatehose

3062880_0910

Installation

• Priortoinstallation,ensurethattheboilerissettotheavailablegastype.

At the factory, the boiler is set up for natural gas H 15.0:

Ws = 11.4 - 15.2 kWh/m

= 40.9 - 54.7 MJ/m

 Whenchangingthegastype,settheapplianceinaccordancewithchapter"Changingthegastype/CO

settings".

• Onlycommissiontheappliancewhentheratedsupplypressurehasbeenreached.

Gas connection

Routingthegaspipeaswellasmakingthegasconnectionsmustonlybecarriedoutbyalicensedgas

tter.

Removeallresiduesfromtheheatingpipeworkandthegaslinepriortoconnectingthecondensingboiler,

particularlyinoldersystems.

Priortocommissioning,testallpipeandgasconnectionsforleaks.

Inappropriateinstallationorusingunsuitablecomponentsorassembliesmayleadtogasescaping,which

resultsinariskofpoisoningandexplosion.

Install a gas ball valve with re protection in the gas supply line upstream of the Wolf condensing

boiler. Otherwise explosions may occur duringare. Size the gas supply line in accordance withlocal

regulations.

Check the gas line for tightness without the boiler.

Never release the test pressure via the gas valve.

Gas ttings on the appliance may be pressure tested to 150 mbar. Higher pressure may damage the

gas train, resulting in a risk of explosion, asphyxiation or poisoning.

Close the gas ball valve on the gas condensing boiler to pressure test the gas line.

Mount the gas ball valve in an easily accessible place.

Connection of a Wolf cylinder,

solar cylinder SEM or third party cylinder

WerecommendtheMMorKMcontrollersfromtherangeofWolfaccessoriesforoptimumswitchingofheatingcircuit

andcylinderprimarypumps.

Whensizingthecylinderensurethatthelowestconstantcylinderoutputcorrespondsatleasttothelowest

heatinputfromtheboiler.Asolarcylinder(withoutsolarthermalsystem)canbeconnectedtoincreasethe

constantDHWoutput.Forthis,bothinternalindirectcoilsneedtoreceiveavolumeowinseries.Otherwise

itcannotbeassuredthatthecylinderwillbefullyheatedup.

Condensateliftingsystem(accessory)

Condensate lifting system (accessory)

TheWolfcondensate liftingsystem is fully wired and

canbeintegratedintotheMGK.Thepowersupplyand

thealarm outputof thecondensate liftingsystem are

connectedtotheboilercontrolunit.

6 m PVC hose for draining off the condensate is

included.

3062880_0910

Installation, combustion air supply / ue system

/ electrical connection

Only use original Wolf components or

CE-designated ue systems to create ue

lines.

Observe the technical information regarding

ventilation air supply / ue systems prior

to installing the ue or the ventilation air

connection.

Differentcountrieshavedifferentregulations.

Wewouldthereforerecommendyoucontact

theappropriateauthoritiesincludingthelocal

uegasinspector,tochecklocalrequirements

priortotheboilerinstallation.

With low outside temperatures, the water

vapourcontainedintheuegasmaycondense

andformiceontheue.Useon-sitemeasures

topreventicefromfalling,e.g.theinstallation

ofasnowcatchergrille.

The boiler power supply terminals are

'live' even when the ON/OFF switch has

been switched OFF.

General information, electrical connection

The installation must be carried out by a

licensed electrical contractor. Observe

local electrical regulations and those of

the local power supply utility.

Fig.:ControlunitMGK-170/210/250/300

24VControlunit 230VJunctionbox

Do not route sensor leads with 230 V

mains cables.

Flue

Fig.:Example:Ventilationair/uesystem

Combustionair

Integraltest

nipplefor

checkingthe

uegas

3062880_0910

Electrical connection

Isolate the gas condensing boiler from

the power supply before changing a

fuse. The ON/OFF switch on the boiler

does not provide separation from the

power supply.

Danger through 'live' electrical

components. Never touch electrical

components or contacts as long as the

gas condensing boiler has not been

isolated from the power supply. Risk

to life.

Changing a fuse

Fig.:Terminalboxcoveropen

Fuse

Installation information, electrical connection,

mains

- Isolate the system from the power supply before

opening.

- Opentheterminalbox.

- Insertthestrainreliefintotheholesprovided.

- Stripapprox.70mminsulationoffthepowercable.

- Pushthecablethroughthestrainreliefandsecure

thestrainrelief.

- PullofftheRast5plug.

- Terminatethe appropriatecoresattheRast5 plug.

Leavethecoresfortheearthconductorgr/yeapprox.

10mmlongerthanthoseforLandN.

- Pushtheinsertsbackintotheterminalboxcasing.

- Push the Rast5 plugs back into their correct

positions.

Fig.:Junctionbox

Fuse5A(fast)

Rast5plug

Strainrelief

Terminal box

Thecontrol,regulatingandsafetyequipmentarefully

wiredandtested.

You only need to connect the power supply and the

externalaccessories.

Power supply

Createapermanentconnectionforthepowersupply.

Providethepowersupplyviaamainisolator(heating

system emergency stop switch) that ensures at least

3mmcontactseparationforallpoles.

Power cable, exible, 3 x 1.0 mm² or rigid, up to

3x1.5mm².

Powersupply

230V

AC/50Hz

Powersupply,heatingcircuit

pump230VAC/50Hz/max.

400VA

Programmable

output

230V

AC/50Hz

Programmable

input,oating

Outside

temperature

sensor

BUS

(Controller,radioclock,AFwith

radioclock,receiver,outside

radiosensor)

3062880_0910

Fig.:Connection,heatingcircuitpump

Heating circuit pump connection (230 V AC; max.

400 VA)

Insertthecableglandsintotheterminalbox.Insert

andsecurethecablethroughthecableentry.

Connecttheheatingcircuitpump230VACtoterminals

L1,Nand

Electrical connection

Wiring diagram, ventilation air damper

(not for MGK-130)

Schaltplan für

Zuluftklappe

MGK 170-250

von1

AFE1

eBUS

12ab

Netz

Z A1

NL1

L1 L1

o ooooo

3,15 A

12 12

L1L1

Supply air damper

with servomotor

Elektroanschlußkasten

MGK

24VDC

Limit switch

NB:

Limit switch for supply air damper must

be floating!

Otherwise the MGK control unit will be

destroyed.

Note:

The contractor parameter

(input 1)

(factory setting for supply air damper) and

(input 1)

(factory setting for supply air damper)

With the contact open, the burner remains

blocked for DHW and central heating, even

for emissions test and frost protection.

HG13/GB13must be set to 5

HG14/GB14must be set to 7

Power supply

230 V AC

230V~

51-10-018-045

Benennung

Zeichnungsnummer

CorelDraw

Art.-/Materialnummer

Blatt

Bl.

NameName Ausg.Ausg.ÄnderungÄnderung AntragAntrag DatumDatum

TerminalboxMGK

5 A

3062880_0910

Electrical connection

Code Explanation

0 No function

OutputA1isnotswitched

1 DHW circulation pump 100%

OutputA1isswitchedbycontrolaccessory(BM)ifDHWcirculationhasbeenenabled.OutputA1isconstantly

activatedwhennoaccessorycontrollerisinstalled.

2 DHW circulation pump 50%

OutputA1isswitchedbycontrolaccessories(BM)incyclesifDHWcirculationhasbeenenabled.5minutesONand

5minutesOFF.OutputA1isconstantlycycledin5minuteintervalswhennoaccessorycontrollerisinstalled.

3 DHW circulation pump 20%

OutputA1isswitchedbycontrolaccessories(BM)incyclesifDHWcirculationhasbeenenabled.2minutesONand

8minutesOFF.OutputA1cyclesconstantlywhennoaccessorycontrollerisinstalled.

4 Alarm output

OutputA1isswitchedafterafaultandafterexpiryof4minutes.

5 Flame detector

OutputA1isswitchedafteraamehasbeendetected.

6 3-way valve

OutputA1isswitchedduringcylinderheating.

7 Ventilation damper

OutputA1isswitchedrstpriorto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oatingcontact.Otherwise,useanon-siterelayforpotential

separation.

8 External ventilation

OutputA1isswitchedinversetothegascombinationvalve.

SwitchingOFFexternalventilation(e.g.extractorfan)duringburneroperationisonlyrequired,iftheboileris

operatedasanopenuesystem.

9 External gas valve

OutputA1isswitchedinparalleltothegascombinationvalve.

The functionsofoutputA1canbescannedandadjustedwitheBUS-enabledWolfcontrolaccessories.Thefollowing

functionscanbeallocatedtooutputA1:

Fig.:ConnectionoutputA1

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.

TerminatetheconnectingcableatterminalsL1,Nand

The parameters for output A1 are described in the

table.

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Wolf MGK-170 Technical Manual And Installation Instructions

Brand: Wolf

Model: MGK-170

Type: Technical Manual And Installation Instructions

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