Immergas VICTRIX TERA V2 24 PLUS EU Operating instructions

Instructions and recommendations
Installer
User
Maintenance technician
*1.047821ENG*
*1.047821ENG*
IE VICTRIX TERA
V22435PLUSEU

2
INDEX
Dear Customer..........................................................................................................................................................................................................4
General Recommendations.....................................................................................................................................................................................5
Safetysymbolsused..................................................................................................................................................................................................6
Personal protective equipment ...............................................................................................................................................................................6
1 Unitinstallation ........................................................................................................................................................................ 7
1.1 Installationwarnings.....................................................................................................................................................................................7
1.2 Main dimensions..........................................................................................................................................................................................14
1.3 Minimum installationdistances ................................................................................................................................................................15
1.4 Antifreezeprotection...................................................................................................................................................................................16
1.5 Installation inside the recessed frame (Optional) .....................................................................................................................................18
1.6 Appliance connection unit ..........................................................................................................................................................................19
1.7 Gas connection .............................................................................................................................................................................................20
1.8 Hydraulic connection ..................................................................................................................................................................................22
1.9 Electrical connection ...................................................................................................................................................................................23
1.10 Remotecontrols androom chrono-thermostats(Optional) ...................................................................................................................25
1.11 Externaltemperatureprobe (Optional).....................................................................................................................................................26
1.12 Generalexamplesof typesofinstallationofuesystems .........................................................................................................................27
1.13 Immergasue systems .................................................................................................................................................................................29
1.14 Equivalentlengths of"Green Range" uesystem components. ...............................................................................................................31
1.15 Maximumue length...................................................................................................................................................................................36
1.16 Conguration for C6 ue installation ........................................................................................................................................................37
1.17 Outdoorinstallationinpartially protectedarea .......................................................................................................................................38
1.18 Internal installationusinga recessedframewith directair intake......................................................................................................... 40
1.19 Concentric horizontal kitinstallation........................................................................................................................................................41
1.20 Concentricvertical kit installation............................................................................................................................................................ 44
1.21 Separatorkit installation .............................................................................................................................................................................47
1.22 C9 adaptorkitinstallation ...........................................................................................................................................................................49
1.23 Concentrickit C10 conguration (Ø 80/125) ..............................................................................................................................................51
1.24 Conguration C10 -C12 separatorkit (Ø 80/80) ..........................................................................................................................................54
1.25 Ductingof uesortechnical slots................................................................................................................................................................60
1.26 Congurationtype B,open chamber andfan assistedforindoors..........................................................................................................61
1.27 Flue exhaust to ue/chimney. ......................................................................................................................................................................61
1.28 Flues,chimneys andchimney caps.............................................................................................................................................................62
1.29 Watertreatmentplantlling .......................................................................................................................................................................63
1.30 System lling................................................................................................................................................................................................ 64
1.31 Fillingthecondensate draintrap ............................................................................................................................................................... 64
1.32 Gassystem start-up ..................................................................................................................................................................................... 64
1.33 Appliance start-up (Ignition) ......................................................................................................................................................................65
1.34 Circulationpump .........................................................................................................................................................................................66
1.35 Kits availableon request...............................................................................................................................................................................68
1.36 Main components.........................................................................................................................................................................................69
2 Instructionsforuseandmaintenance ..................................................................................................................................... 70
2.1 General recommendations..........................................................................................................................................................................70
2.2 Cleaningandmaintenance..........................................................................................................................................................................72
2.3 Control panel ................................................................................................................................................................................................73
2.4 Usingthe appliance ......................................................................................................................................................................................74
2.5 Fault andanomalysignals............................................................................................................................................................................76
2.6 Informationmenu ........................................................................................................................................................................................80
2.7 Appliance switch-o ....................................................................................................................................................................................81
2.8 Restore centralheatingsystempressure.....................................................................................................................................................81
2.9 Draining thesystem .....................................................................................................................................................................................81

3
2.10 Antifreeze protection...................................................................................................................................................................................82
2.11 Prolongedinactivity.....................................................................................................................................................................................82
2.12 Cleaning thecase ..........................................................................................................................................................................................82
2.13 Permanentshutdown ...................................................................................................................................................................................82
3 Instructionsformaintenance andinitial check....................................................................................................................... 83
3.1 General recommendations..........................................................................................................................................................................83
3.2 Initialcheck...................................................................................................................................................................................................84
3.3 Yearlyappliancecheckand maintenance...................................................................................................................................................85
3.4 Hydraulic diagram .......................................................................................................................................................................................87
3.5 Wiring diagram ............................................................................................................................................................................................88
3.6 Troubleshooting ...........................................................................................................................................................................................89
3.7 Convertingtheappliance to othertypes ofgas ..........................................................................................................................................90
3.8 Fan speedcalibration ...................................................................................................................................................................................91
3.9 CO2/O2regulation ........................................................................................................................................................................................92
3.10 Checksfollowingconversionto another typeof gas..................................................................................................................................93
3.11 P.C.B.programming ....................................................................................................................................................................................93
3.12 Password-protected special functions .......................................................................................................................................................99
3.13 Screed heater ...............................................................................................................................................................................................100
3.14 Automatic ventfunction(dl) .....................................................................................................................................................................101
3.15 Flue installation (FU) .................................................................................................................................................................................101
3.16 Maintenance function(MA).....................................................................................................................................................................101
3.17 Chimney sweep...........................................................................................................................................................................................102
3.18 Pump anti-block .........................................................................................................................................................................................102
3.19 ree-way anti-block .................................................................................................................................................................................102
3.20 Radiator antifreeze.....................................................................................................................................................................................102
3.21 Casing removal ...........................................................................................................................................................................................103
3.22 Replacing themanifoldinsulatingpanel .................................................................................................................................................106
3.23 Assemblyof manifoldgasket oncondensationmodule..........................................................................................................................108
3.24 Assembling the manifoldonthe condensationmodule .........................................................................................................................110
4 Technicaldata.........................................................................................................................................................................111
4.1 Variable heatoutput ...................................................................................................................................................................................111
4.2 Combustionparameters............................................................................................................................................................................113
4.3 Technical data table ....................................................................................................................................................................................114
4.4 Key fordata nameplate ...............................................................................................................................................................................115
4.5 Technical parametersforcombinationboilers (incompliance withRegulation813/2013) ...............................................................116
4.6 Product che(in compliance with Regulation 811/2013) .......................................................................................................................118
4.7 Parameters forlling inthe packageche............................................................................................................................................... 120

4
Dear Customer
For assistance and routine maintenance, contact Authorised Technical Service Centres: they have original spare parts and are specically
trained directlyby the manufacturer.
Congratulations for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Im-
mergas customer youcan alsocounton aQualied Authorised Aer-Sales TechnicalAssistanceCentre,preparedandupdatedto guarantee
constant eciency of your appliance. Read the following pages carefully: you will be able to draw useful tips on the proper use of the device,
compliance with which willconrm your satisfactionwiththeImmergasproduct.
For assistance and routine maintenance, contact Authorised Technical Service Centres: they have original spare parts and are specically
trained directlyby the manufacturer.
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manufac-
turing andaer-salesassistance processes complywith therequirements ofstandardUNI ENISO9001:2015.
For further details on the product CE marking, request a copy of the Declaration of Conformity from the manufacturer, specifying the
appliance modelandthelanguage ofthe country.
e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its tech-
nicaland commercial documentswithoutforewarning.

5
GENERALRECOMMENDATIONS
isbookcontains importantinformationforthe:
Installer (section 1);
User (section 2);
MaintenanceTechnician(section 3).
• euser mustcarefullyreadthe instructionsin thespecic section(section 2).
• euser mustlimitoperationson theapplianceonlyto those explicitly allowedinthe specicsection.
• einstructionbooklet isan integralandessentialpartofthe productandmustbe giventothe newuser in thecaseof transfer
orsuccessionof ownership.
• It must be stored with care and consulted carefully, as all of the warnings provide important safety indications for installa-
tion, useandmaintenancestages.
• In compliance with the legislation in force, the systems must be designed by qualied professionals, within the dimensional
limits established by the Law. Installation and maintenance must be performed in compliance with the regulations in force,
according tothe manufacturer'sinstructionsand byprofessionally qualiedsta,meaning stawith specic technicalskills
in the plant sector, asprovidedforby Law.
• Improperinstallationorassembly ofthe Immergas deviceand/or components,accessories, kits anddevicescancause unex-
pected problems forpeople,animals andobjects. Read the instructionsprovided withthe productcarefully to ensureproper
installation.
• isinstructions manualprovidestechnicalinformationforinstalling Immergasproducts. As fortheother issues relatedto
the installation of products (e.g. safety at the workplace, environmental protection, accident prevention), it is necessary to
complywith the provisions ofthe standardsin force andthe principlesofgoodpractice.
• AllImmergas products areprotectedwith suitabletransport packaging.
• ematerial must be storedin adry place protectedfrom theweather.
• Damaged productsmust notbeinstalled.
• Maintenance must be carried out by skilled technical sta. For example, the Authorised Service Centre that represents a
guarantee ofqualicationsand professionalism.
• e appliance must only be destined for the use for which it has been expressly declared. Any other use will be considered
improperand thereforepotentiallydangerous.
• If errors occur during installation, operation and maintenance, due to non-compliance with technical laws in force, stand-
ardsor instructionscontainedin thisbooklet (or howeversuppliedby themanufacturer),themanufacturerisexcluded from
anycontractual andextra-contractual liability foranydamages andthe devicewarranty is invalidated.
• In theeventofmalfunctions,faults orincorrectoperation,turn theappliance o andcontact anauthorisedcompany(e.g.the
Authorised Technical Assistance Centre, which has specically trained sta and original spare parts). Do not attempt to
modifyor repair the appliance alone.

6
SAFETY SYMBOLSUSED
GENERICHAZARD
Strictly follow all of the indications next to the pictogram. Failure to follow the indications can generate hazard situations
resulting inpossibleharmto thehealthof theoperatoranduserin general, and/orpropertydamage.
ELECTRICALHAZARD
Strictlyfollowallof theindications nextto thepictogram.e symbolindicates theappliance’selectrical componentsor, in
thismanual, identies actionsthat can causeanelectricalhazard.
MOVING PARTS
esymbolindicates theappliance’s moving componentsthat can causehazards.
DANGEROFHOTSURFACES
esymbolindicates theappliance’s very hotcomponents thatcan causeburns.
WARNINGS
Strictly follow all of the indications next to the pictogram. Failure to follow the indications can generate hazard situations
resulting inpossibleminorinjuries tothe healthofboth theoperatorandtheuser ingeneral, and/orslightmaterial damage.
ATTENTION
Read and understand the instructions of the appliance before carrying out any operation, carefully following the instruc-
tions given.Failureto observethe instructionsmay resultin malfunctionofthe unit.
INFORMATION
Indicates usefultips oradditional information.
EARTHTERMINAL CONNECTION
esymbolidentiesthe appliance’searth terminal connectionpoint.
DISPOSALWARNING
e user must not dispose of the appliance at the end of its service life as municipal waste, but send it to appropriate
collectioncentres.
PERSONALPROTECTIVEEQUIPMENT
SAFETYGLOVES
EYE PROTECTION
SAFETY FOOTWEAR

7
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
1 UNITINSTALLATION
1.1 INSTALLATIONWARNINGS
Operatorswhoinstallandservicetheappliancemustwearthepersonalprotectiveequipment
requiredbyapplicable law.
isappliancehas been designed forwall mounted installationonly,forcentral heating (andproduction ofdomestichotwater
fordomesticuseand similar purposes ifpairedwith astorage tank unit).
eplace ofinstallationoftheapplianceand relative Immergas accessories must havesuitablefeatures (technicalandstructur-
al),such asto allowfor(alwaysin safe, ecientand comfortable conditions):
- installation(according tothe provisionsoftechnical legislationand technicalregulations);
- maintenanceoperations(including scheduled,periodic,routine andspecial maintenance);
- removal (to outdoors in the place for loading and transporting the appliances and components) as well as the eventual re-
placementofthosewith appliances and/orequivalentcomponents.
e wall surface must be smooth, without any protrusions or recesses enabling access to the rear part. ey are not designed to
beinstalled onplinths oroors(Fig.1).
Byvaryingthe typeof installationtheclassicationof theapplianceand precisely:
- Type B23 or B53 appliance ifinstalled usingthe relevantterminalsforairintake directly fromtheroom inwhichtheappliance
has beeninstalled.
- Type C appliance if installed using concentric pipes or other types of pipes envisioned for the sealed chamber appliance for
intakeof air andexpulsionof uegas.
eequipmentclassication is shown in the illustrationsofthe variousinstallationsolutions onthe following pages.
Onlyprofessionallyenabled companies areauthorisedtoinstallImmergas gas appliances.
Installation must be carried out according to regulation standards, current legislation and in compliance with local technical
regulations and the required technical procedures.

8
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
OK
1
Itisforbiddento installappliances removed fromothersystems.
e manufacturer declines all liability in the event of damage caused by appliances removed from other systems or for any
non-conformities with such equipment.
Check the environmental operating conditions of all parts relevant to installation, referring to the values shown in the techni-
cal datatablein this booklet.
InstallationoftheappliancewhenpoweredbyLPGorpropaneairmustcomplywiththerules
regardinggaseswith a greaterdensitythan air(remember, as an example,thatitisprohibited
to install plants powered with the above-mentioned gas in rooms where the oor is at a lower
quotathanthecountrylevel).
If installing akitor servicing the appliance,alwaysempty the system’scircuitrstsoas notto compromise theappliance’s elec-
tricalsafety(Parag. 2.9).
Alwaysdisconnect theappliancefromvoltageand, dependingonthetype ofoperation, decrease thepressureand/orbring itto
zero inthe gas andDHWcircuits (whencombinedwith aStorageTank Unit).
Beforeinstalling theappliance, ensurethat itisdeliveredin perfect condition;if in doubt, contact the supplierimmediately.
Packing materials (staples, nails, plastic bags, polystyrene foam, etc.) constitute a hazard and must be kept out of the reach of
children.
If the appliance is installed inside or between cabinets, ensure sucient space for normal servicing; therefore it is advisable to
leave clearance of at least 3 cm between the boiler casing and the vertical sides of the cabinet. Leave adequate space above and
belowtheboiler toenableinterventionsonthe water andueremoval connections(Fig.3).
Itisjustasimportantthattheintakegridsandexhaustterminalsarenotobstructed.
It is recommended to check that no ue gas recirculation is found in the air sample points
(0.5%maximumpermittedCO2).

9
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
eminimum distanceforexhaust pipes fromammablematerialsmust be atleast25 cm.
Keep allcombustiblematerialawayfrom theappliance(paper,rags, plastic, polystyrene,etc.).
Splitexhaust ductsmustnotpass through walls ofcombustiblematerial.
Do not place household appliances underneath the appliance as they could be damaged if the safety valve intervenes, if the
drain trap is blocked, or if there areleaks fromthe hydraulicconnections; otherwise, themanufacturer cannotbe held respon-
sibleforanydamagecausedtothe householdappliances.
Fortheaforementioned reasons, werecommendnotplacing furnishings, furniture, etc.undertheappliance.
In the event of malfunctions, faults or incorrect operation, turn the appliance o and contact an authorised company (e.g. the
Authorised TechnicalAssistance Centre,which hasspecicallytrained sta andoriginalspare parts).
Donot attempt tomodify orrepair theappliancealone.
Any modication tothe appliance thatisnotexplicitly indicatedin thissectionof thebooklet is forbidden.

10
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
Installationstandards
istype ofinstallationis possiblewhen permitted bythe lawsin forceinthe appliance'scountryofdestination.
isappliancecanbeinstalled outdoorsinapartially protectedarea.
Bypartially protectedarea,wemean oneinwhich theunitis notdirectly exposed tothe elements(rain, snow,hail, etc.).
Installationofgasappliances,ueexhaustpipesandcombustionairintakepipesisforbidden
in places with a re risk (for example: garages, closed parking stalls), and in potentially dan-
gerous places.
Donotinstallontheverticalprojection ofhobs(forappliancesupto35kW,UNI7129).
Do not install in places/rooms that constitute public areas of apartment buildings, internal
stairwaysorotherescaperoutes(e.g.oorlandings,entrancehalls,etc.).
ese appliances, if not adequately isolated, are not suitable for installation on walls of com-
bustible material.
Installationisalsoforbiddeninplaces/roomsthatconstitutepublicareasofapartmentbuild-
ings such as cellars, entrance halls, attics, los, etc., unless otherwise provided for by local
regulationsinforce.

11
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
ese appliancesare usedto heat waterto belowboilingtemperaturein atmosphericpressure.
ey mustbeconnected toa central heatingsystem anddomestic hotwater circuit(whencombinedto astorage tank unit)suit-
edtotheirperformanceand capacity.
estoragetankunit,if present, must also be installedin anenvironmentinwhich thetemperature cannotfall below0°C.
Installing the wall recessed frame kitmustguaranteethe boilerstable, ecientsupport.
e recessed frame kit ensures appropriate support only if installed correctly (according to the rules of good practice), following the in-
structionsonitsinstructionsleaet.
Forsafety reasonsagainstanyleaksit is necessary to plasterthe boilerhousingin thebrickwall.
erecessedframeforthe boileris nota supporting structureandmustnotreplacethewall removed.Itisnecessary topositionthe boiler
insidethewall.
eplugs(standardsupply) that comewiththe appliance areonlyto be usedto x thelatter tothe wall; they only ensureadequatesupport
if inserted correctly (according to technical standards) in walls made of solid or semi-hollow brick or block. In the case of walls made
from hollow brick or block, partitions with limited static properties, or in any case walls other than those indicated, a static test must be
carriedoutto ensureadequatemount.Appliances mustbeinstalled insucha wayas toavoidknocks ortampering.
Wallmountingoftheappliancemustguaranteestableandecientsupportforthegenerator.

12
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
Riskofdamageduetocorrosioncausedbyunsuitablecombustionairandenvironment.
Spray, solvents, chlorine-based detergents, paints, glue, ammonium compounds, powders and similar cause product and ue
ductcorrosion.
Check that combustionair powersupplyisfree fromchlorine, sulphur, powders, etc.
Make surethatnochemical substances arestored inthe place ofinstallation.
If you want to install the product in beauty salons, paint workshops, carpenter’s shop, cleaning companies or similar, choose a
separateinstallationareathat ensures combustionairsupplythat is freefromchemicalsubstances.
Make sure thecombustionair is notfedthroughchimneys thatwerepreviously used with boilers orothercentral heatingappli-
ances poweredbyliquid orsolidfuels. In fact,thesemay causean accumulationofsoot in the chimney
Riskofmaterialdamageaerusingspraysandliquidstosearch forleaks
PX42GasValve
Leakspraysand liquids clogthe referenceholeP1.Ref. (Fig.55) ofthegasvalve,damaging itirreparably.
During installationandmaintenance,do notusesprayorliquidsintheupper areaof thegasvalve(electricconnections side).
SIT848GASValve
Leakspraysand liquids clogthe ventinghole(Ref. 4 and7 Fig.56)ofthegas valves,damagingit irreparably.
During installationandmaintenance,do notusesprayorliquidsintheupper areaof thegasvalve(electricconnections side).
“Anti-Legionella” heat treatment of the Immergas storage tank (only if paired with a storage tank unit and function enabled
whenthe system is provided withtemperaturecontrol).
During thisphase,the temperature ofthe waterinsidethetankexceeds60°C withthe subsequentriskof burns.
Keep this domestic hot water treatment under control (and inform the users) to prevent unforeseeable damage to people, ani-
mals,things.
If required installa thermostaticvalveonthe domestichotwateroutlet topreventscalding.

13
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
Fillingthecondensatedraintrap
Whentheapplianceisswitchedonforthersttime,combustionproductscomeoutofthecon-
densatedrain.Aerafewminutesofoperation,checkthatcombustionuegasesarenolonger
coming out of the condensate drain; this means that the drain trap has lled to a correct con-
densateheightthattheuegasescannotpassthrough.
SpecialprovisionsforappliancesinstalledinB23 orB53 conguration.
Open chamber appliances type B23 and B53 must not be installed in rooms in which commer-
cial, cra or industrial activities are carried out where products are used that are capable of
developingvapoursorvolatilesubstances(e.g.acidvapours,glues,paints,solvents,fuels,etc.),
as well as dust (e.g. dust from wood processing, coal dust, cement dust, etc.) that could be
harmfultotheappliance'scomponentsandimpairitsoperation.
In conguration B23 and B53, unless local regulations are in force, the appliances must not be
installed in bedrooms, bathrooms, toilets or studios; they must neither be installed in rooms
containingsolidfuelheatgeneratorsnorinroomscommunicatingwithsaidrooms.
For appliances for domestic use (up to 35 kW) in B23 and B53 conguration, the installation
rooms must be permanently ventilated, in compliance with the local regulations in force (at
least 6 cm2for each kW of heat input installed, except in the case of the presence of electrome-
chanical extractorfansorotherdevicesthatcandepressurisetheinstallationroom).
Install theappliances in B23 and B53 congurationin non-residential premisesandwhichare permanently ventilated.
Failuretocomplywiththeaboveimpliespersonalresponsibilityandinvalidatesthewarranty.

14
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
1.2 MAIN DIMENSIONS
36
65 55 55 55 95 70 45
275
220
105 105
440
120
253
135
250
687 25
30 95
8
11
748
115
220
115
2
Key (Fig.2):
SC - Condensate drain (minimum inter-
nal diameterØ 13mm)
V - Electricalconnection
G - Gassupply
RR - Systemlling
RU - Storagetankunit return
MU - Storagetankunit ow
R - Systemreturn
M - Systemow
Height (mm) Width(mm) Depth (mm)
748 440 253
CONNECTIONS
SYSTEM GAS DOMESTICHOTWATER
MU-RU M-R GRR
3/4" 3/4" 3/4” 1/2”

15
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
1.3 MINIMUMINSTALLATIONDISTANCES
3
Key (Fig.3):
A - 450 mm
B - 350 mm
C - 30 mm
D - 30 mm
E - 350mm

16
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
1.4 ANTIFREEZEPROTECTION
Appliance antifreeze protectionisthusonlyensured if:
- theapplianceis correctlyconnectedtogasand electricity powersupplycircuits;
- theapplianceis poweredconstantly;
- theapplianceis notin “o” mode.
- theapplianceis notin anomalyconditions(Parag. 2.5);
- theapplianceessentialcomponentsare notfaulty.
Topreventtheriskoffreezing followtheinstructionsbelow:
- Protectthe centralheatingcircuitfromfreezingby inserting a good-qualityantifreeze liquidintothiscircuit, whichisspeciallysuited
forcentral heating systems andwhich is manufacturerguaranteednottocausedamage tothe heat exchanger orothercomponentsof
the appliance. e antifreeze liquid must not be harmful to one's health. e instructions of the manufacturer of this liquid must be
strictlyfollowedregardingthenecessarypercentagewith respectto theminimum temperature atwhich thesystemmust be kept.
- e materials used for the central heating circuit of Immergas appliances resist propylene glycol based antifreeze liquids (if the mix-
tures arepreparedperfectly).
- An aqueoussolution mustbemadewith potential pollutionclassof water 2(EN 1717:2002 orlocal standardsinforce).
Follow the supplier's instructions for the life cycle duration and possible disposal of the anti-
freeze liquid.
ewaterinthe storagetank unit (if present) isnotprotected against freezing when theapplianceisswitchedo.
eantifreezesystemsdescribed inthis chapterareforthe exclusiveprotectionof theappliance;thepresenceofthese functions
anddevicesdoesnotexcludethepossibility offreezingofpartsof thesystem ortheDHWcircuit(whencombinedwith astorage
tankunit)external tothe appliance.
eexcessive useof glycol couldjeopardise theproper functioningof theappliance.

17
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
Minimum roomtemperature-5°C
Insulatethevisiblepipes andttings with10mm thickinsulatingmaterial (coolinginlet pipe,heatingoutlet pipeandcondensatedrain-
ing pipe).
e appliance comes as per standard with an antifreeze function that activates the pump and the burner when the system water temper-
aturein theappliancefallsbelow4°C.
In these conditions, previously listed, theapplianceis protectedagainst freezing upto anambienttemperature of-5°C.
If theapplianceisinstalled in a place wherethe temperaturedropsbelow-5°C,the appliance mayfreeze.
Wheninstalling the appliance inlocations wherethetemperaturefallsbelow-5°C, installationofthe antifreezekitis required,
respectingall the conditionslistedabove.
Minimum roomtemperature-15°C
Protect the domestic hot water circuit (when paired with a storage tank unit) against freezing by using an accessory that is supplied on
request (antifreeze kit) comprising an electric resistance, the relevant wiring and a control thermostat (carefully read and follow the in-
stallationinstructionscontained intheaccessorykitpack).
e warranty does not cover damage due to interruption of the electrical power supply and failure to comply with that stated on the pre-
viouspages.
In the previously listed conditions ad with the addition of the antifreeze kit, the appliance is protected against freezing up to a
temperature of-15°C.

18
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
1.5 INSTALLATIONINSIDETHE RECESSED FRAME OPTIONAL
eapplianceisdesigned forinstallationinsidethe Immergas recessedframe(suppliedas optional).
enecessarypartsforthistype ofinstallation(brackets) must alsobepurchasedseparately as optional kit.
To installproceed as follows:
- Install thebracket (2) insidetherecessedframexing itwiththescrews (3)inthepre-drilled holes (Fig.4).
- Hangthe boiler(4) tothe bracket(2) (Fig.5).
- Block theboiler (4)by mounting thebrackets(5)andxing themwith theirscrews (6)(Fig.6).
e brackets (5) used to centre the appliance on the frame and hold it in place stop against the frame (1) so do not require xing to the
frame itself.
1
2
3
3
4
1
4
2
2
5
1
4
5
6
5
6
6

19
INSTALLER
USERMAINTENANCETECHNICIAN
TECHNICALDATA
1.6 APPLIANCE CONNECTION UNIT
e connection unit consisting of all the necessary parts to perform the hydraulic and gas system connections of the appliance comes as
optional kit, perform the connections in accordance with the type of installation to be made and respecting the arrangement shown in
gure 7:
1
2
3
G
V
RU 5
MU
RR
R
SC
M
4
7
Key (Fig.7):
V - Electricalconnection
G - Gassupply
RU - Storagetankunit return
MU - Storagetankunit ow
RR - Systemlling
SC - Condensate drain (minimum inter-
nal diameterØ 13mm)
M - Systemow
R - Systemreturn
1 - Systemllingvalve
2 - Systemdraining valve
3 - 3bar safety valvedrain ttingsignal
4 - Storage tank unit bypass pipe, to be
used only in case of boiler operating
inroomheating modeonly
5 - Airventvalvedrain

20
INSTALLERUSERMAINTENANCETECHNICIANTECHNICALDATA
1.7 GAS CONNECTION
Our appliances are built to work with natural gas (G20), LPG and mixtures of methane and hydrogen at 20% in volume (20%H2NG), re-
ferred tothe gas distributedin thenetwork.Powersupplypipes must be thesameasor largerthanthe appliance tting.
Data nameplatepositioning
8
Before connecting the gas line, carefully clean inside all the fuel feed system pipes to remove any residue that could impair ap-
plianceeciency.
Also make surethe gas corresponds to thatforwhich theapplianceisprepared (seeappliancedata nameplate).
If dierent, theboiler must be converted foroperationwith theother typeofgas (see convertingapplianceforothergas types).