Wolf MGK-130 User manual

Instructions for conversion to
LPG P (G31)
Gas condensing boilers MGK-130
Conversion kit, product no. 87 51 351
from G20 to G31
Document no. 3062883_0910 Subjecttotechnicalmodications GB
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. [phone] · Fax [phone] · Internet: www.wolf-heiztechnik.de

23062883_0910
Standard delivery
Standard delivery
Conversion kit, product no. 87 51 351 from G20/G25 to G31
No. Material Mat no. Pce
1Gasrestrictor6.7 1730640 1
2Conversiontypeplate 8751389 1
3Installationinstructions 3061675 1
4 GasketgascombinationvalveoutletO-ring23.47x2.62 39 10 126 1
5 GasketgascombinationvalveinletO-ring26x4 39 03 010 1
6GascombinationvalveLPG 2744621 1
7 BoilercodingcardforLPGPMGK-130 2744356 1
Note Readtheconversioninstructionscarefullybeforecommencingtheinstallation.
WOLF conversion kit to G31 for MGK-130
Priortochangingthegasrestrictor,performthestandardsettingsatthegascombinationvalve.
Otherwisethereisariskofinjuryandmateriallossesontheboiler.

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3062883_0910
Safety instructions
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.
Fig.:Ignitiontransformer,highvoltageignitionelectrode,
combustionchamber.
Dangerfrom'live'electricalcomponents,riskofburning
throughhotcomponents.
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.
Fig.:Junctionbox:
Dangerfromelectricalvoltage.

43062883_0910
Safety instructions
"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.
General information
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yourlocalheating
contractor.
Fig.: Gasconnection:Riskofpoisoningandexplosion
throughescapinggas.

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3062883_0910
Conversion to G31
Themainsterminalsare'live'evenwhenthe
ON/OFFswitchhasbeenswitchedOFF.
Isolatetheappliancefromthepowersupply,otherwise
thereisarisktolifefromelectrocution.
Closetheon-sitegastap,otherwisethereis
ariskofsuffocationorexplosion.
Installation
Pivotthecontrolunitliddown.SwitchOFFthe
ON/OFFswitchatthegascondensingboiler.

63062883_0910
Removing the front casing
Undothefrontcasingwithano.5Allenkeyandthe
r.h.sidepanelwithascrewdriver.
Conversion to G31
Risk of burns!
Variouscomponentscangetveryhot.Letthem
cooldownorwearprotectivegloves,otherwise
thereisariskofburns.

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3062883_0910
Fig.:Gascombinationvalve.
Zeropoint
screw,Tx40
Torx(under
thecover)
Gas type Zero point
G20 1 ¾turns
G31 1 ¾turns
Carefullyturnthescrewfullyhomeandthenundoas
follows:
Standard setting for different gas types:Turnanti-
clockwise.
1. Standard setting at the gas combination valve
Make the standard settings at the gas
combination valve in accordance with the
table. Otherwise there is a risk of damage to
the appliance.
NB
Conversion to G31
2. Replacing the gas combination valve and the gas
restrictor
a)Undotheelectricalconnectionsatthegascombination
valve(GCV)(3screws).
Fig.:Gascombinationvalve.
3screws
b) Undothemixerwithitsmountingplateandinletpipe
fromthefan(3screws).
3screws

83062883_0910
d) UndotheGCVfromthemixer(4screws).
c)Undothescrewsbetweenthegaspipeandthe
GCV(4screws).
e) Removethegasrestrictor.
For G20 and G31
Fit suitable restrictor with O-ring 23.47 x 2.62 into
GCV.
Conversion to G31

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3062883_0910
Conversion to G31
Fitthegaspressurelimitertothenewgas
combination valve.
Undoandremovethescrewforthegassupply
pressureonthenewgascombinationvalve.
ReplaceO-ring26x4atthegasinlet.
f) Replacing the gas combination valve when
converting from natural gas to LPG
Removethegaspressurelimiterfromtheoldgas
combination valve.

10 3062883_0910
g) RettheGCVandmixer.
h)SecuretheGCVandmixeronthegaspipe.Donot
forgettheO-ring.
i) Securethemixerwithitsmountingplateandinlet
pipetothefan.
Conversion to G31
j) SecuretheelectricalconnectionsontheGCV.
3screws

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3062883_0910
CO2settings
Carry out the adjustments in the order given below. At the factory, the gas combination valve has
been set up for natural gas H (G20). Only adjust the gas combination valve after the system has been
changed to a different gas type.
NB
A) CO2setting at the upper load (emissions test
mode) for natural gas
• Turnclockwise-lowersCO2content
• Turnanti-clockwise-raisesCO2content
• Terminatetheemissionstestmodebyreturningthe
temperatureselectortoitsoriginalposition.
Appliance open(withoutcasing)atupper load
G20
9.2% ± 0.2%
G31(check)
11.0% ± 0.2%
Fig.:Fluegastestattheintegraltestport.
Testport
• Pivotthecontrolunitliddown.
Unlockthecasingcoverwiththel.h.andr.h.
turnbuckles.Releasethebottomofthecasingcover
andunhookatthetop.
• Removethescrewfromthel.h."Fluegas"testport.
• InsertthetestprobeoftheCO2testinstrumentinto
the"uegas"testport(approx.120mm).
• Turn the temperature selector to "Emissions test"
.
 (Statusindicatorringashesyellow.)
• Ensurethattheboilerisnotlimitedelectronically.
• ChecktheCO2contentatfullload,andcomparethe
actualvalueswiththoseinthetablebelow.
• Correct the CO2 setting as required using the gas
throughput screw on the gas combination valve in
accordancewiththetable.
The upper load cannot be adjusted for LPG.
Fig.:Gascombinationvalve.
Gasow
adjustingscrew
(onlyfornatural
gas)
3. Setting the gas / air mixture prior to replacing the boiler coding card for conversions from LPG to natural
gas
Settings must be made with the natural gas boiler coding card to be able to set the lower output in
soft start for LPG P.
NB

12 3062883_0910
Appliance open(withoutcasing)atlower load
G31
12.5%±0.2%
B) CO2setting at the lower load (soft start)
• Restart the gas condensing boiler by pressing the
"Resetbutton".
• CheckandifnecessarycorrecttheCO2contentapprox.
30saftertheburnerstartwiththeCO2tester,byne
adjustingthezeropointadjustingscrewinaccordance
withthetable.Makethisadjustmentwithin120sof
theburnerstart.Ifnecessary,repeatthestartphase
forsettingproceduresbypressingtheresetbutton.
• Turnclockwise-raisesCO2content.
• Turnanti-clockwise-lowersCO2content.
Fig.:Gascombinationvalve.
Zeropointscrew,Tx40
Torx(underthecover)
Gasthroughputscrew
(slottedscrew)onlyfor
naturalgas
CO2settings

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3062883_0910
3. Changing the boiler coding card
Conversion to G20, G25 or G31
a)Whereappropriate,recordtheparameterchanges
comparedtotheirfactorysettings
 (e.g.output,Tvmax,output1,input1,address
setting).
b) Isolatetheappliancefromthepowersupply.
c) Pivotoutthecontrolunit.
d) Opentheboilercodingcardcover.
e) Pullofftheboilercodingcardandpluginthenew
one.
f) Rettheboilercodingcardcover.
Boilercodingcardcover
Boilercodingcard
4. Function check
a) Aftercommissioning,themulti-functionindicatoron
theON/OFFswitchbeginstoash.Pressthereset
buttontwice.
b) Theburnerstarts.
c) Function check:Closethegastap.
 Faultcode12orindicatorringashesred.
d) Opengastap,pressresetbutton.
 Theburnerstarts.
e) Adjustparametersifchangesfromthefactory
settingsarerequired.
f) Checkthefunctionofcontrolaccessories.

14 3062883_0910
5. Checking the CO2setting
• Aftercompletingthework,retthecasingcoverand
checktheCO2valuewiththeapplianceclosed.
ObservetheCOemissionswhilstmakingCO2
adjustments. The gas combination valve is
incorrectlyadjustediftheCOvalueis>200ppm
whentheCO2valueiscorrect.Takethefollowing
steps:
Standardsetting:Carefullyturnthescrewfullyhomeand
thenundoasdescribedunderpoint1"Standardsetting
atthegascombinationvalve".
Appliance closed(withcasing)
insoftstart
G20/9.1%±0.5% G31
11.5±0.5%
Appliance closed(withcasing)
at upper load
G20/9.3%±0.5% G31
11.3±0.5%
Check in soft start following the installation
of the LPG boiler coding card. The load in
soft start with the LPG boiler coding card is
not equal to the lower load.
NB
6. Completing the settings
• Shutdowntheboilerandclosethetestportsandhose
nipples;checkfortightness.
Conversion to G20, G25 or G31

15
3062883_0910
7. Updating the type plate
• Fromtheconversiontypeplate,cutouttheareathat
correspondstothegastype.
• Overlaytherespectivetypeplateontheappliancewith
thecut-outsection.
Nennwärmebelastung
Heizen
Nennleistung
Heizen 50/30°C
Heizen 80/60°C
Q = 29 - 120 kW
P = 30 - 126 kW
P = 28 - 117 kW
Eingestellt auf
3P - G31 - 50 mbar
B23, B33, C33, C43, C53, C83
C63 gem. Montageanleitung
Warmwasser Q = 29 - 120 kW
Art
MGK-130
Nennwärmebelastung
Heizen
Nennleistung
Heizen 50/30°C
Heizen 80/60°C
Q = 74 - 280 kW
P = 78 - 294 kW
P = 71 - 275 kW
Eingestellt auf
Art B23, B33, C33, C43, C53, C83
C63 gem. Montageanleitung
Warmwasser Q = 74 - 280 kW
3P - G31 - 50 mbar
MGK-300
Nennwärmebelastung
Heizen
Nennleistung
Heizen 50/30°C
Heizen 80/60°C
Q = 53 - 200 kW
P = 56 - 208 kW
P = 51 - 194 kW
Eingestellt auf
B23, B33, C33, C43, C53, C83
C63 gem. Montageanleitung
Warmwasser Q = 53 - 200 kW
Art
3P - G31 - 50 mbar
MGK-210
Nennwärmebelastung
Heizen
Nennleistung
Heizen 50/30°C
Heizen 80/60°C
Q = 43 - 160 kW
P = 46 - 167 kW
P = 41 - 156 kW
Eingestellt auf
B23, B33, C33, C43, C53, C83
C63 gem. Montageanleitung
Warmwasser Q = 43 - 160 kW
Art
3P - G31 - 50 mbar
MGK-170
Nennwärmebelastung
Heizen
Nennleistung
Heizen 50/30°C
Heizen 80/60°C
Q = 60 - 240 kW
P = 62 - 250 kW
P = 58 - 233 kW
Eingestellt auf
B23, B33, C33, C43, C53, C83
C63 gem. Montageanleitung
Warmwasser Q = 60 - 240 kW
Art
3P - G31 - 50 mbar
MGK-250
8751389 08/08
Conversiontypeplate.
Conversion to G20, G25 or G31



Wolf GmbH · Postfach 1380 · D-84048 Mainburg · Tel. [phone] · Fax [phone] · Internet: www.wolf-heiztechnik.de