Wolf MGK-130 Technical specifications

Maintenance instructions
Gas condensing boilers
MGK-130
MGK-170
MGK-210
MGK-250
MGK-300
Document no. 3062882_0910 Subjecttotechnicalmodications GB
Wolf GmbH · Postfach 1380 · D-84048 Mainburg · Tel. [phone] · Fax [phone] · Internet: www.wolf-heiztechnik.de

2 3062882_0910
Contents
Contents ............................................................................................................................................................... Page
Safetyinstructions ....................................................................................................................................................3-4
Maintenanceprocedure............................................................................................................................................5-7
MaintenanceprocedureMGK-130 .........................................................................................................................8-10
MaintenanceprocedureMGK-170/210/250/300 ..................................................................................................11-12
Check/maintenance,componentsMGK-130toMGK-300 ...................................................................................13-17
Neutralisingsystem&siphon ...............................................................................................................................18-20
Maintenanceprocedure,nalising........................................................................................................................21-23
Function check ..........................................................................................................................................................24
Listofrequiredparts..................................................................................................................................................25
Overviewofthestepstobetakenandmaintenancereport .................................................................................26-27
Installation,non-returnvalvefortheMGK-130(whenreplacingthefan) .............................................................28-30

33062882_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.
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.
Parts of boilers can get very hot;
consequently there is a risk of serious
burns.
Therefore allow to cool down prior to
installation work.
This requires an action.
Visual check.
Safety instructions
Fig.:Terminalbox:
 Dangerfromelectricalvoltage.
Fig.:Ignitiontransformer,highvoltageignition
electrode,ionisationelectrode,heatexchanger
 Dangerfrom'live'electricalcomponents,riskof
burningthroughhotcomponents.

4 3062882_0910
Safety instructions
Maintenance work must only be carried out
by a qualied heating contractor.
Regular maintenance and the exclusive use
of original Wolf spare parts are of crucial
importance to the trouble-free operation
and long service life of your appliance.
We therefore recommend you arrange a
maintenance contract with a local heating
contractor.
General information
Fig.:Gas connection: Escaping gas may cause
poisoningortheriskofexplosion.
"NB" indicates technical instructions that
youmustobservetopreventmateriallosses
and malfunctions on the boiler.
NB
Fig.:Gascombinationvalve.
 Dangerfromelectricalvoltage.
 Escaping gas may cause poisoning or an
explosion.
MGK-170/210/250/300 MGK-130

53062882_0910
Maintenance procedure
OFF
OFF
OFF

6 3062882_0910
Maintenance procedure
Allowtocooldownfor1hour.
2x
5 mm
1x

73062882_0910
Maintenance procedure
4x
3 mm

8 3062882_0910
Maintenance procedure MGK-130
Fig.:Undoallelectricalconnectionsatthefanandthe
ignitiontransformer.
Fig.:Undothescrewsbetweenthefanandthe
mixingchamber.
13 mm
13 mm
4x

93062882_0910
Maintenance procedure MGK-130
Fig.:Removetheunitcomprisingburnerangeandfan.
6 mm
13 mm

10 3062882_0910
Maintenance procedure MGK-130
Gasket,burnerangegasket.
Fig.:Visualcheck,non-returnvalve.
+
Checkthatthenon-returnvalveoperatesfreely.

113062882_0910
Maintenance procedure
MGK-170/210/250/300
Undoallelectricalconnectionsatthetransformerand
the fan.
Undothemixingchamberfromthefan.
6 mm
13 mm
4x

12 3062882_0910
Removetheburnerangewiththefan.
Maintenance procedure
MGK-170/210/250/300
4x
13 mm

133062882_0910
Burner ange gasket, replace gasket if
necessary.
Check/maintenance,
components MGK-130 to MGK-300
Flush the burner with tap water or compressed air if
necessary.
Shakeoutpriortoinstallation.

14 3062882_0910
Check/maintenance,
components MGK-130 to MGK-300
4x
13 mm
Securetheangewithgasketandignitiontransformer
on the fan.

153062882_0910
Insertelectrodescorrectly
Ignitionelectrode:Earthtabatthetop
Ionisation electrode: Orientation towards the
burner.
NB
Ignitionelectrodewithgasket
Monitoringelectrodewithgasket
Check/maintenance,
components MGK-130 to MGK-300
4x
3 mm

16 3062882_0910
Check/maintenance,
components MGK-130 to MGK-300
6x
10 mm
Maintenance, cast iron boiler
Openallcleaningcovers.
6x
10 mm
Inspectthegasketvisuallyandreplaceif
necessary.

173062882_0910
Cleanthecondensatepanwithawetvacuumcleaner.
Check/maintenance,
components MGK-130 to MGK-300
6x
10 mm
Inspectthegasketvisuallyandreplaceif
necessary.
6x
10 mm

18 3062882_0910
Removetheperforatedsieveononesideandloosen
upwiththecleaningrodandifnecessarywater.Repeat
theprocessontheotherside.
Neutralising system & siphon
• Checkthecondensatepump.
• Topupneutralisingsystemandifnecessary
granulate.
• Checkthecondensatepumpplug-incontact.
• TestingthepHvalueontheneutralisingsystem
drain.
→ ApHvalueof<7indicatesthataserviceis
required.
• Visual check of the neutralising system:
→ Aserviceisrequiredifthegranulatehasadark
coating.
→ Aserviceislikelytoberequiredifthelevelhas
fallenbelowthemaximumlevel.

193062882_0910
Neutralising system & siphon
Flushthegranulateseveraltimeswithwater.
Flushemptytubewithwater.

20 3062882_0910
Neutralising system & siphon
Regularlytopupwithgranulate.
Fillwithnewgranulatepelletsusingafunnelandtopup
tothemaximumlevel.
NB
Fig.: Filling
Cleanandllthesiphon.