REMEHA 24c Manual

127768-271011

EN
Great Britain






2
Remeha Avanta Plus
127768-271011
 
  
1.1 General safety 5
1.2 Safety during assembly and installation 5
1.3 Safety during installation, inspection and maintenance 5
  
2.1 Scope of delivery 7
2.2 Mounting the boiler 7
2.2.1 Clearance requirements 7
2.2.2 Dimensions and connection points. 8
2.2.3 Mounting the Remeha Avanta Plus 10
2.3 Water-side connections 10
2.3.1 Waterow 10
2.3.2 Circulation pumps 11
2.3.3 AdditionalguidelinesforthedomesticandCHwater 11
2.3.4 Water treatment 11
2.3.5 Safety valve discharge 12
2.3.6 Pressureswitch 13
2.3.7 Expansion vessel 13
2.3.8 Connecting DHW pipes 13
2.3.9 Connecting the ‘CH return’ 14
2.3.10Connecting‘CHow’ 14
2.3.11 Connecting condensate drain 15
2.3.12Connectingunderoorheating 15
2.4 Gas-side connections 15
2.4.1 Additional guidelines for gas connections 15
2.4.2 Adjusting boiler to other gas-type 16
2.4.3 Connecting the gas supply 16
2.5 Flue terminal and air supply connections 16
2.5.1 Flue terminal positions 16
2.5.2 Roomsealedue 17
2.5.3 Connectingtheueterminalandairsupply 18
2.6 Electrical connection 19
2.6.1 The control unit 19
2.7 Connecting external controls 20
2.7.1 On/offcontrol–roomtemperature(voltfreeswitching) 22
2.7.2 Time control using an internal or external 230 V clock 22
2.7.3 Connectinga230Vtimeclockincombinationwithamodulatingroomcontrol 23
2.7.4 Modulating control – room or outside compensation 23
2.7.5 Connecting an outside temperature sensor 24
2.7.6 Connecting the DHW sensor/thermostat 25
2.7.7 Connecting a frost thermostat 25
2.7.8 Connecting an external interlock 26
2.7.9 Connecting remote alarm, boiler run indication and external pump relay 26
2.7.10 Connecting a PC/PDA 26

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that
customersareprovidedwiththecorrectequipmentfortheirneeds,thatitisinstalled,commissionedand
servicedinaccordancewiththemanufacturer’sinstructionsbycompetentpersonsandthatitmeetsthe
requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demon-
stratecompliancewithBuildingRegulationsandshouldbeprovidedtothecustomerforfuturereference.
Installersarerequiredtocarryoutinstallation,commissioningandservicingworkinaccordancewiththe
BenchmarkCodeofPracticewhichisavailablefromtheHeatingandHotwaterIndustryCouncilwho
manage and promote the Scheme.
Visitwww.centralheating.co.ukformoreinformation.
Contents

3
Remeha Avanta Plus
127768-271011
2.8 Wiring diagram 27
2.9 Commissioning 28
2.9.1 Control Panel 28
2.9.2 Additional guidelines for commissioning 28
2.9.3 Putting the boiler into operation 28
2.9.4 Normal start-up procedure 34
2.9.5 Error during the start-up procedure 35
2.9.6 Read out settings 36
2.9.7 Adjust the boiler according to the system 36
2.9.8 Changingtheparametersatservicelevel(withaccesscode) 37
2.9.9 Changingthemaximumoutput(Hi)forCHoperation 40
2.9.10 Restore factory settings 42
2.10 Putting the boiler out of operation 42
2.10.1Boilerwithfrostprotection,duringlongerperiodsofnon-use 42
2.10.2Boilerwithoutfrostprotection,duringlongerperiodsofnon-use 42
  
3.1 Inspection 43
3.1.1 Checkingthewaterpressure 44
3.1.2 Checkingtheuepipesandairsupplypipesforleaks 44
3.1.3 Checking the condensate siphon 45
3.1.4 Checking the ignition electrode 45
3.1.5 Checking the combustion 45
3.2 Maintenance 47
  
4.1 General 52
4.2 Error codes 52
4.3 Control stop or lock-out 54
4.4 Error memory 55
4.4.1 Error read outs 55
4.4.2 Deleting errors 55
  
5.1 General 56
  
  
7.1 EC regulations 60
7.2 Remeha factory test 60
7.3 Additional guidelines 60
  
8.1 Technical data 61
8.2 The boiler components 63
8.3 Working principle 63
8.3.1 Regulating 64
8.3.2 Advanced boiler control (‘abc®’-control) 64
8.3.3 Regulatingthewatertemperature 64
8.3.4 Lowow/waterprotection 65
8.3.5 Pressureswitch 65
8.3.6 High Limit temperature protection 65
  
9.1 Annual efficiency 66
9.2 Water-side efficiency 66
Contents

4
Remeha Avanta Plus
127768-271011
112952LTGBW7H001b
INTRODUCTION
The Remeha Avanta Plus is a series of high-efficiency fully
condensingcentralheatingboilers,forwallmounting,available
inthefollowingtypes:
• RemehaAvantaPlus24c,28c,35cand39c-withintegrat-
eddomestichotwatersystem(Combi-type)
• RemehaAvantaPlus18s,24s,30s-withoutintegrated
domestichotwatersystem(ystem-type)
g. 01 Remeha Avanta Plus
112952.LT.GB.W7H.001
These technical instructions contain useful and important infor-
mation for the correct installation, operation and maintenance
of the Remeha Avanta Plus combi and system boilers.

Read these instructions carefully before putting the boiler into
operation,familiariseyourselfwiththeircontrolfunctionsand
operation, strictly observing the instructions given. Failure to
dosomayinvalidatewarrantyorpreventtheboilerfrom
operating correctly.
The installation, commissioning, inspection and servicing of
the boiler must be carried out by a competent registered engi-
neerwhoholdsvalidACScertificationandinaccordancewith
currentgassafety(installationanduse)regulations,thebuild-
ing regulations and all other relevant codes of practice.
Allelectricalworkmustbecarriedoutbyacompetentengi-
neerandtobeinstalledinaccordancewiththecurrentIEE
regulations.
It is the responsibility of the installer to ensure that all flue sys-
temsareinstalledinaccordancewithmanufacturersinstruc-
tions and all the requirements of EN 14471.

On commissioning the certificate in the Benchmark Checklist
withintheInstallation+Servicemanualmustbecompleted
andleftonsitewithacopysendontoRemehafor
registration purposes.
If you have any questions, require an engineer to call on site,
or if you need more information about specific subjects relating
to this boiler, or it's installation please do not hesitate to con-
tact our technical help line 0118 974 3070.

WhencontactingRemehawithaproblemontheboiler,please
have available the boiler type, Serial No (located on the
bottomofthecasing),andthesymptomsorfaultcode(the
faultcodeisaseriesofflashingreddigitsinthedisplaypanel).
The data published in these technical instructions is based on
thelatestinformation(atdateofpublication)andmaybesub-
ject to revisions.
We reserve the right to continuous development in both design
and manufacture, therefore any changes to the materials or
technologyemployedmaynotberetrospectivenormaywebe
obliged to adjust earlier supplies accordingly.
Introduction

5
Remeha Avanta Plus
127768-271011
 
 
ThefollowingpictogramsareusedinthisInstallationandSer-
vicemanualtospecificallydrawcertainpointstoyouratten-
tion:
Tip Useful tip or practical advice.
  Important instruction in carrying out a
particular operation.
 Possible danger of personal injury
or material damage to the regulator,
building or environment.
 Serious personal injury can occur
because of risk of electric shocks.
 
Observe the appropriate safety measures, as given in these
instructions.


• donotsmokeanddonotcreateanyflameorsparks;
• donotuseanyelectricswitches;
• turnoffthegastap;
• openwindowsanddoors;
• tracepossibleleaksandsealthem.
 If the leak is before the gas meter, alert your gas
supplier, TRANSCO, tel. [phone]


• isolatepowersupply.
• openwindowsanddoors;
• tracepossibleleaksandsealthem.
 

UnderthecurrentGasSafety(Installation&Use)Regulations,
theRemehaAvantaPlus,incommonwithallgasappliances,
mustbeinstalledbyacompetentpersoninaccordancewith
that regulation.
Statutory regulations in any country, cannot be overridden by
any of the notes or instructions from the manufacturer.
CompliancewithNationalStandardsdoesnotprovideany
degree of immunity from legal obligations. In the UK, the
installationmustbeinaccordancewiththenationalandlocal
norms and requirements.
Foranyissuesorcircumstancesnotaddressedwithinthese
instructions, please call our After Sales Department
0844 879 7690
1. Safety

6
Remeha Avanta Plus
127768-271011
LTALW7H000074a
TheRemehaAvantaPlus(combiandsystem)isaWRAS
(Waterregulations)approvedproduct.
g. 02 WRAS logo
LT.AL.W7H.000.074
RemehaAvantaPlus(combiandsystem)-PIN:
0063BQ3009
GasCouncilnumbers:
RemehaAvantaPlus24c:41-288-01
 RemehaAvantaPlus28c:47-673-02
 RemehaAvantaPlus35c:47-673-03
 RemehaAvantaPlus39c:47-673-04
 RemehaAvantaPlus18s:41-288-11
 RemehaAvantaPlus24s:41-288-05
 RemehaAvantaPlus30s:41-288-12
Classificationtypeforevacuationofthecombustionproducts;
accordingEN483:see par. 8.1.

• TheweightoftheAvantaPlussystemandcombiboilers
exceedthemaximumliftweightforoneperson.Please
ensureallnecessarycareistakenwhenliftingtheboileron
tothewallmountingplate.
• Allsealantsandgasketsarefreefromharmfulproducts.On
first firing the boiler, a smell from the sealants and gaskets
may be present and should cease after a short period.
1. Safety

7
Remeha Avanta Plus
127768-271011
3x
3x
3x
Instructie service
AvantaPlus
112952LTGBW7H011b
400
min.600 300
min. 250
min. 250
670
112952LTGBW7H003a
g. 03 Scope of delivery
112952.LT.GB.W7H.011
g. 04 Clearance requirements
112952.LT.GB.W7H.003
 
 
The standard delivery of the Remeha Avanta Plus boiler
includes:
- Theboiler(includingpressuregaugeandsafetyvalve);
- Mountingplate(includingisolationvalvesetandwashers);
- Nylonplugsandscrewsforfixingmountingplate;
- Coppertails15/22mm;
- Mountingtemplate;
- Fillingloop;
- WarrantyLeaflet(Thetermsandconditionsofthewarranty
areincludedinthewarrantyleaflet,oninstallationofthe
boiler please fill in the registration card and return to
Remeha);
- Installation and Service manual and Users guide.
ThisInstallationandServicemanualdealswiththestandard
supplied boiler only. For the installation or assembly of any
optionalaccessoriessuppliedwiththeboiler,suchasstandoff
frame,pipeworkkits,coverplate,controlkits,etc,pleaserefer
totheAssemblyInstructionssuppliedwiththeseaccessories.
 
PackedintheboxwiththeRemehaAvantaPlusboxis
this Installation and Service manual. Read instructions and
remarks carefully. This section includes the guidelines and
instructionsfortheconnectionofgas,water,electricity,safety
devices, the regulator, control unit, flue discharge and air sup-
ply.
2.2.1 Clearance requirements
Thegasandwaterconnectionsarelocatedonthebottomof
theboilerwhilsttheairinandfluegasoutletislocatedonthe
topoftheboiler.Theboilerissuppliedasstandardwithpipe-
worktailstoallowconnectionsfacingdownwards.
Optionalstandoffframeandpipeworkkitsareavailable
toenablethepipeworktorunupwardsbehindtheboilerif
required. For installation, servicing and inspection min. 600
mm in front of the boiler is required. If this free space is
obtained by opening a door or removing a panel, the boiler
may be installed for instance in a closed cupboard.
Foreaseofinstallationwerecommendclearancesof0.5cm
atthesidesothattheunitiseasytoopen,withafreespace
of 25 cm under the appliance and 25 cm above the appliance,
as the minimum requirement.
Howeveronceinstalled,itispossibletoreducetheseclear-
ances to 22 cm at the top, and 5 cm at the bottom provided
the boiler front panel can be removed and the isolating valves
areeasilyaccessiblewithouttheuseoftools”
2. Installation

8
Remeha Avanta Plus
127768-271011
73.3(2x)
49
180.75
200
312.5
21
71.5
328.5
379
584106
670
26.5
24
systeem
146.7
141.7
30.5
148
112952LTGBW7H005a
74.5
400
160
300
132.5
2.2.2 Dimensions and connection points.

 Return connection Ø 22 mm
 Flow connection Ø 22 mm
 Gas connection Ø 22 mm
 Combustion air inlet Ø 100 mm (concentric)
 Flue duct Ø 60 mm (concentric)
 Condensate drain connection ¾”
(standard overflow pipe size)
Connection safety valve Ø 15 mm
2. Installation
g. 05 Dimensions and connection points of the Remeha Avanta
Plus system
112952.LT.GB.W7H.005

9
Remeha Avanta Plus
127768-271011
73.3(2x) 79.8(2x)
49
114
180.75
200
247.5
312.5
21
71.5
328.5
379
74.5
584106
400
160
300
132.5
670
23
26.5
146.7
141.7
30.5
148
112952LTGBW7H002a
combi

 Return connection Ø 22 mm
 Flow connection Ø 22 mm
 Gas connection Ø 22 mm
 Combustion air inlet Ø 100 mm (concentric)
 Flue duct Ø 60 mm (concentric)
 DHW inlet (cold) connection Ø 15 mm
 DHW outlet (hot) connection Ø 15 mm
 Condensate drain connection ¾” (standard overflow pipe
size)
Connection safety valve Ø 15 mm

• Basedontheguidelinesandtherequiredinstallation
 space,determinewheretomounttheRemehaAvanta
Plus.
• Indeterminingtheboilerposition,considercarefullythe
flue outlet position and any pluming consequences.
2. Installation
g. 06 Dimensions and connection points of the Remeha Avanta
Plus combi
112952.LT.GB.W7H.002

10
Remeha Avanta Plus
127768-271011
112952LTGBW7H012a
ø10 mm
g. 07 Mounting the Avanta Plus
112952.LT.GB.W7H.012
2.2.3 Mounting the Remeha Avanta Plus
• Removethemountingplateandtemplatefromthebox.
• Usingthetemplatedetermineandmarkthepositionofthe
three mounting holes and center line of flue, making sure
the plate is absolutely level.
• Drillthe(Ø 10mm)holes.
• Fitthe(Ø 10mm)plugs.
• Fit(Ø8mm)screwsintotheplugs.
• Checkthemountingplateislevelandtightenthescrews.
• Fitthevalvesettothemountingplate.
• FitfibrewashersontheCHvalves.
• Removeboilerfromtheboxandsuspenditonmounting
plate.
• Connectthevalvestotheboilerrememberingtofitfibre
washerssupplied.
• Connectthesuppliedcoppertailstotheisolatingvalves.

• Theboilershouldbemountedonasuitableverticalwall
 whichisabletosupporttheweightoftheboiler.
• Theboilershouldbemountedinaroomwhich,evenduring
 severecoldweather,remainsfrost-free.
• Iftheboileristobeinstalledinatimberframedbuilding,
 pleaserefertoBritishGaspublication:‘GuideforGas
Installations in Timber frame Housing’, reference DM2.
• Inanewinstallationitispossibletofitjustthewallplateand
 valvesettoenablethesystempipeworktobecompleted
and tested before fitting the boiler at a later date (place
 fibrewasherssuppliedinasafeplaceforusewhenfitting
 theboiler).

• Makesuretheboilerandanyopenconnectionsare
protected from building dust etc. during the installation.
• Theremustbea3ampfusedswitchedspurwithin1mof
the boiler.
• Provisionmustbemadeforthecondensatedischarge.
 
2.3.1 Water flow
Aninternalautomaticflowby-passissuppliedintheAvanta
PlustoensurecorrectoperationonsystemsfittedwithTRV’s
on all heat emitters. The ‘®’ control also monitors the tem-
peraturedifferenceacrosstheflowandreturnconnectionsand
therateoftemperatureriseandwillautomaticallyregulatethe
boiler output to ensure that it remains operational for as long
aspossiblewithouttheneedto‘lockout’requiringamanual
re-set.
2. Installation

11
Remeha Avanta Plus
127768-271011
Residual head UPR 15-60
0
100
200
300
400
500
600
0 200 400 600 800 1000 1200
CH-flow [l/h]
Residual head [mbar]
dT 20°C 18kW
Pump 'high'
Pump 'low'
LTALW7H000013c
Residual head UPR 15-70
0
100
200
300
400
500
600
700
0 200 400 600 800 1000 1200 1400 1600
CH- flow [l/h]
Residual head [mbar]
Pump 'high'
Pump 'low'
LTALW7H000014c
dT 20°C 28kW
g. 08 Graph residual head UPR 15-60 for the CH installation with
Avanta Plus 18s, 24s, 24c and 28c
LT.AL.W7H.000.013
g. 09 Graph residual head UPR 15-70 for the CH installation with
Avanta Plus 30s, 35c and 39c
LT.AL.W7H.000.014
2.3.2 Circulation pumps
TheRemehaAvantaPlus18s,24s,24cand28carefittedwith
the Grundfos UPR 15-60 and the Avanta Plus 30s, 35c and
39cwiththeUPR15-70,two-speedcirculationpumps.The
controlunitensuresthatwhenthehot-waterfunctionisactive,
the pump runs at ‘high’. The factory setting of the pump for CH
functionis‘low.’Ifnecessary,theserviceinstallercanadjust
thisto‘high’byswitchingparameter21 (from 0to 1)see
par. 2.9.8.
2.3.3 Additional guidelines for the domestic and CH
water
• Thesystemshouldbefilledwithmainscoldwater(forthe
UKthiswillusuallyhaveapHofbetween7and8).
• Flushthepipesandradiatorsthoroughlytoremoveallfluxes
and debris before connecting the boiler to the central heat-
ing system.

• Thetemperatureofthecentralheatingpipesandthe
radiators can rise to 95°C.
• UseuntreatedtapwateronlytofilltheCHsystem.
• ThepHvalueofthesystemwatermustbebetween6and9
• Incaseinhibitorsarebeingused,pleasefollowthe
instructions given in par. 2.3.4.
2.3.4 Water treatment
Ifusedcorrectlywatertreatmentcanimprovetheboilers
efficiency and increase the anticipated life expectancy of the
boiler. For further information a special document “Quality
requirementsCHwater”isavailablefromRemeha.
As most systems contain a variety of metals, it is considered
goodpracticetoprovidesomeformofwatertreatmentinorder
topreventorreducethefollowing:
• Metalliccorrosion
• Formationofscaleandsludge
• Microbiologicalcontamination
• Chemicalchangesintheuntreatedsystemwater

Allscaledepositshoweversmallwillreducetheefficiencyof
the boiler and should be prevented.
Suitablechemicalsandtheiruseshouldbediscussedwitha
specialistwatertreatmentcompanypriortocarryingoutany
work(environmentalaspects,healthaspects).Thespecifica-
tion of the system and manufacturers recommendations must
betakenintoaccount,alongwiththeageandconditionof
thesystem.Newsystemsshouldbeflushedthoroughlyto
BS7593(1992)toremovealltracesofflux,debris,grease
andmetalswarfgeneratedduringinstallation.Caretobe
takenwitholdsystemstoensureanyblackmetallicironoxide
sludge and other corrosive residues are removed, again by
powerflushing,ensuringthatthesystemisdrainedcompletely
fromalllowpoints.
2. Installation

12
Remeha Avanta Plus
127768-271011

Pleaseensurethatthenewboilerplantisnotincircuitwhen
the flushing takes place, especially if cleansing chemicals are
used to assist the process.
It is important to check the inhibitor concentration after installa-
tion, system modifications, filling the system and every service
inaccordancewiththeseinstructions.
For the correct dosage and the suitability of inhibitors for use
withourboilersandforfurtherinformationonwatertreatment
orsystemcleaningweadvisedirectcontactwitheitherofthe
followingcompanies:
®’manufacturedby:
Fernox, Cookson Electronics
Forsyth Road
Sheerwater
Woking
Surrey GU21 5RZ
TelNo:01483793200
FaxNo:01483793201
Email:[email protected]
Website:www.fernox.com
or:
®’manufactured by
Sentinel Performance Solutions
The Heath Business & Technical Park
Runcorn
Cheshire,
WA7 4QX
TelNo:08003894670
FaxNo:08003894677
Email:[email protected]
Website:www.sentinel-solutions.net
2.3.5 Safety valve discharge
A pressure relief safety valve is fitted in the boiler set to the
maximum operating pressure of the boiler of 3 bar.
If the pressure in the boiler becomes too high the pressure
isrelievedbyreleasingwatertooutsideviathesafetyvalve
discharge pipe. The discharge pipe should be fitted in accord-
ancewithBritishStandardsandmustbeatleast15mmØ.
Thepipeshouldbepositionedsothatthedischargeofwater
or steam is visible and cannot create a hazard to the occu-
pants of the premises or damage the electric components and
wiring.Inadditionthedischargeshouldbelocatedwhereitis
unlikely to cause damage to the premises.
2. Installation

13
Remeha Avanta Plus
127768-271011
LTALW7H000015b
g. 10 Connecting DHW pipes
LT.AL.W7H.000.015
2.3.6 Pressure switch
Apressureswitchisfittedintheboilersettominimumoperat-
ingpressureoftheboilerof0.6bar.Ifthewaterpressurein
theboilerdropsbelow0.6bar,thepressureswitchwillockthe
boiler and error code e9 appears in the display. When the
central heating system has been refilled, the boiler has to be
reset manually.
2.3.7 Expansion vessel
An8litreexpansionvessel(withthevesselchargesetto1.0
bar)isfittedasstandardwithintheboilercaseandissuitable
foruseinaheatingsystemwithawatercontentupto100
litres,operatingataflowtemperatureof80°C,amaximum
pressure of 3 bar and a maximum system static head of 5
metresabovetheboiler.Ifthesystemwatercontentisgreater
than 100 litres, or the system static head above the boiler is
greater than 5 m, an additional vessel must be installed in the
systemtoallowfortheincreaseinexpansion,see table 01.

Install additional vessel according BS 5449, part1.

 
VesselCharge(Bar) 0.5 1 1.5
Heating System Water Content
(Litres)


100 4.8 8.0 13.3
125 6.0 10.0 16.6
150 7.2 12.0 20.0
175 8.4 14.0 23.3
200 9.6 16.0 26.6
250 12.0 20.0 33.3
300 14.4 24.0 39.9
For other system volumes, mul-
tiply the system volume by the
factoracross:
0.048 0.080 0.133
table 01 Expansion Vessel Size
2.3.8 Connecting DHW pipes
 (Forcombitypeonly)
• FittheoutletpipeforhotwatertotheDHWoutlet15
mmØconnection.
• FittheinletpipeforcoldwatertotheDHWinlet15 mm
Øconnection.

• TheDHWpipesmustbeconnectedinaccordancewith
current regulations.
• Forplasticpipes,followthemanufacturer’sinstructions
 (forconnection).
2. Installation

14
Remeha Avanta Plus
127768-271011
LTALW7H000016b
LTALW7H000017b
g. 12 Connecting CH return
LT.AL.W7H.000.016
g. 13 Connecting CH ow
LT.AL.W7H.000.017
2.3.9 Connecting the ‘CH return’
2.3.10 Connecting ‘CH flow’
• FittheinletpipeforCHwatertothe‘CHreturn’22 mm
Øconnection.

The Remeha Avanta Plus has a drain cock built into the return
isolating valve
It is considered good practice to install an air separator / dirt
removal device in the return to the boiler.
• FittheoutletpipeforCHwatertothe‘CHflow’22 mm
Øconnection.

TheRemehaAvantaPlushasadraincockbuiltintotheflow
isolating valve.
T000887-A
A
MAINS WATER EXPANSION VESSEL:
A Mini expansion vessel
B Mains water inlet pipe
C Non-return valve
D Boiler
D
CB
g. 11 Mains water expansion vessel
T000887

IMPORTANT:Non-return,backflowpreventiondevices
(includingthoseassociatedwithwatermeters)fittedtothe
mainswatersupply,cancauseapressurebuildupwitchcould
damage the boiler and other Household appliances.
Wherethemainswatersupplyhasanonreturn,backflow
preventionvalvefitted,aminiexpansionvessel(A)shouldbe
connectedtothemainsinletpipe(B)betweenthenon-return
valve(C)andtheboiler(D)asshownopposite.

Anon-returnvalvemayberequiredwhenfluctuatingwater
pressures causes a combi boiler to operate momentarily in
hotwatermode
2. Installation

15
Remeha Avanta Plus
127768-271011
LTALW7H000018b
g. 14 Connecting condensate drain
LT.AL.W7H.000.018
2.3.11 Connecting condensate drain
• Connectthecondensatedrainoutlettoasuitablewaste
waterdrainpointusingacidresistingpipework(i.e.-¾”
overflow).Toenablethesiphonintheboilertoberemoved
/ serviced, the connection should not be a permanent one
(i.e.“pushfit”system).
• Topreventtheriskoffreezingconnectthecondensateinto
aninternalverticalsoilpipeusingatundish(airbreak)c/wa
min75mmwatersealtrap.
• Ifthecondensatepipehastorunexternallymakesure
this is done by realizing the shortest possible route, and
increasethediametertoatleast1¼”orinsulateitwith
weatherresistantinsulation.
• Thedrainshouldslopeatleast3cmpermeter,withamaxi-
mum horizontal length of 5 m.

• Ifconnectingintoaninternaldischargebranch(i.e.sink
 wasteetc.)theconnectionshouldpreferablybedown
 streamoftheexistingwastetrap.
• Filltheboilersiphonwithwaterbeforeoperation,toprevent
flue gasses discharging into the room.
• Thecondensatedrainmustbeconnectedinaccordance
 withcurrentregulations.
2.3.12 Connecting under floor heating
The Remeha Avanta Plus can be connected directly to an
under floor heating system.
If plastic pipes have been used they must be made oxygen dif-
fusionproofincompliancewithDIN4726/4729
Wheninstallingunderfloorheatingwithaseparatepump,the
layout should be such that the under floor heating pump can-
notcauseaflowtotheboilerifthereisnoheatdemand.Alow
lossheadershouldthereforebefittedbetweenthesystemand
the boiler.

Please ensure that the residual pump duty of the boiler is
sufficient for the resistance of the under floor system. If not a
lowlossheadershouldbeusedtoseparatetheboilerfrom
theunderfloorcircuittoallowaseparatepumpsizedforthe
resistance of the under floor system to be used.
 
2.4.1 Additional guidelines for gas connections

Before installation, check that the gas meter has sufficient
capacity for the demand. Remember to consider the
consumption of all household appliances.
2. Installation

16
Remeha Avanta Plus
127768-271011
LTALW7H000019c
g. 15 Connecting gas supply
LT.AL.W7H.000.019
2.4.2 Adjusting boiler to other gas-type
The Avanta Plus boilers are suitable for both natural gas and
propanefiring.Forpropaneakitwithrestrictorisrequired.
ForAvantaPlus39caLPGconversionsetwithrestrictorand
burner is needed.
The boilers are supplied as standard set for natural gas
(G20),thereforethefollowingproceduremustbecarriedout
BEFORE the boilers are fired and commissioned for the first
timeonpropane:
Fittheconversionkit(instructionsincludedinkit)
Adjust the fan speed (see par. 2.9.8)andadjustthegas/air
ratio (see par. 2.9.3).
2.4.3 Connecting the gas supply
• Beforestartinganyworkonthegassupply,turnoffthemain
isolation valve.
• Connectthegassupplytothe22mmØboiler
connection.

• Makesurethereisnodirtinthegaspipe.Blowthroughthe
 pipebeforeinstallationortapwelltopurge.
• Theprincipleofthe1:1gasvalveensurestheAvantarange
 isabletodeliverit’sfulloutputatinletpressuredownto17
 mbar.Howeverifdynamicpressurebelow19mbarare
experienced ensure this is adequate for ALL other gas
appliances in the property.
• Preferablyinstallagasfilterinthegaspipetopreventthe
gas block from getting dirty.
• Thegassupplymustbeconnected,testedforsoundness
and purged by a qualified Engineer and in accordance
 withBS6891.
 
The Remeha Avanta Plus is only suitable for room sealed
operationwithastandardconcentricconnection60/100mmØ
ortheoptional80/125mmØconnection.
Detailed recommendations for air supply and flue terminals are
given in BS 5440.

It should not be necessary to provide compartment ventilation
whentheboilerisusedwithastandardconcentricflue.
2.5.1 Flue terminal positions
Theflueterminalmustbelocatedwithcaretoensurethatthe
productsofcombustionaredispersedproperlyinallweather
conditions and cause minimum nuisance to the building user
or any adjacent buildings. If the terminal is positioned less
than2mabovetheground,balcony,orflatroofwhereaccess
by persons is possible a suitable guard must be employed.

Theboilerwillproduceawatervapourplumeduringnormal
operation.
2. Installation

17
Remeha Avanta Plus
127768-271011
R000150-A
G
G
A
R
B
600 mm
600 mm
2000 mm
D,E
S
S
F
P
H
C
J
J
L
M
K,N
No flue must penetrate
area within dotted lines
round roof light
g. 16 Flue terminal positions
R000150
-

 -
-


ADirectlybelowanopening,airbrick,
openingwindow,etc. 300 mm
BAbove an opening, air brick, open-
ingwindow,etc. 300 mm
CHorizontally to an opening, air brick,
openingwindow,etc. 300 mm
DBelowagutterorsanitarypipework 75 mm
EBelowtheeaves 200 mm
FBelowabalconyorcarportroof 200 mm
GAbove ground, roof or balcony level 300 mm
HFromverticaldrain/soilpipework 150 mm
JFrom an internal or external corner 300 mm
KFrom a surface or boundary facing
the terminal 1500 mm
LVertically from a terminal on same
wall 1500 mm
MHorizontally from a terminal on
samewall 300 mm
NFrom a terminal facing the terminal 1200 mm
PFrom an opening in a carport (e.g.
door,window)intothebuilding 1200 mm
RFrom a vertical structure on the roof n/a
SAboveanintersectionwiththeroof 300 mm
112952.LT.GB.W7H.065
112952.LT.GB.W7H.066
    
       
 629629730525


LT W6H 000 031
1.4


LT W6H 000 032
0.65
table 03 Maximum pipe lengths for ue duct and air supply in room sealed application
LTNLW6H000031A
LTNLW6H000032A
112952LTGBW7H065b
L
Roof mounted
room sealed
terminal
112952LTGBW7H066a
L
80/125 or 60/100
Positions for the Remeha Avanta Plusareshowninthefigure
and table 02.
table 02 Minimum distances to terminal
n/a = not applicable.
2.5.2 Room sealed flue
See table 03 for the maximum pipe length of flue ducts and air
supply pipes for this ‘room sealed’ application.
It is not necessary to provide combustion air to the room or
internalspaceinwhichtheboilerisinstalled.
2. Installation

18
Remeha Avanta Plus
127768-271011
g. 17 Connecting ue terminal and air supply
112952.LT.GB.W7H.065+112952.LT.GB.W7H.066

For flue installations not covered by this booklet, please
contact our technical help line 0118 974 3070.
2.5.3 Connecting the flue terminal and air supply
112952LTGBW7H065b
L
Roof mounted
room sealed
terminal
112952LTGBW7H066a
L
80/125 or 60/100
• Howtoinstallthehorizontalorverticalflueterminalandair
supplykits;pleasetakenoteofthemountinginstructions
suppliedwithit.

• Fluecomponentsmustbeinstalledinaccordancewiththe
 instructionssuppliedwiththem.
• Allconnectionsmustbeairtight,waterproofandwell
supported.
• Horizontalextensionsectionsshouldslopetowardsthe
 boiler(atleast5cmpermetre).
2. Installation

19
Remeha Avanta Plus
127768-271011
112952LTGBW7H022a
230 V
LTALW7H000023a
g. 18 Electrical components with live 230 V
112952.LT.GB.W7H.022
g. 19 The control unit
LT.AL.W7H.000.023
 
• Connecttheboilertothefused(3amp)switchspurunit
adjacent to boiler.
• Theswitchunitmustalwaysbeaccessible.
2.6.1 The control unit
The Remeha Avanta Plus has an electronic regulation and
controlunitwithanintegratedionisationflamedetector.The
heart of the boiler control unit is a microprocessor, the ®’,
whichcontrolsandprotectstheboiler.

Whentheswitchspurisonthefollowingcomponentsofthis
appliancecanbelive(230V):
• electricalconnectionpump;
• electricalconnectiongascombinationblock;
• electricalconnectionthree-wayvalve;
• mostpartsofthecontrolunit;
• ignitiontransformer;
• X1,X2,X4,X5,X6andX7terminalblock;
• 230Vsupplycableconnection.
Themaximumratedinputisbetween115and180W(depend-
ingonboilertype).
Theboilerisfullypre-wiredinternally,allexternalconnections
can be made using the terminal blocks X5 - X7 - X9 and 230
Vinput(X2terminal).Seethediagramforthepositionofthe
connectorsandfuse(F2)onthecontrolunit.
The most important properties of the control unit are summa-
rized in table 04.
2. Installation

20
Remeha Avanta Plus
127768-271011
1
2
LTALW7H000024c
g. 20 Connecting external controls
LT.AL.W7H.000.024
Manufacturer Sit Controls
Supply voltage 230 V – 1ph – 50 Hz
Pre-purge time 3 s
Post-purge time 5 s
Ignition time 2.5 s
Safety time 5 s
Anti-cycling time 3 till 10 min.
FusevalueF1(230V) 2 AT
DC fan 24 VDC
table 04 Control unit characteristics

Anyloadsotherthanthosespecifiedaboveareonlyallowedif
an isolating transformer is used.
The output of the Remeha Avanta Plus can be controlled in
thefollowingways:Options
1.  The boilers internal
controlwillmodulatetheoutputtoachievetheflowtem-
perature set point of the boiler. This contact is on the con-
nectors7and8onterminalblockX9(lowvoltageonly).
2. The external controls
willmodulatetheboiler’soutputtoachievetheflowtemper-
ature determined by the modulating regulator. This contact
isontheconnectors7and8onterminalblockX9(lowvolt-
ageonly).
3.  The boilers internal
controlwillmodulatetheoutputtoachievetheflowtempera-
ture set point of the boiler. This contact is on the connector
1onterminalblockX2(230VAConly).
4.


Theboilerwillprovideroomcompensatedheatingandtime
controloverCHandDHW(Systemboiler),useoptions1&2.

• AllconnectionsonterminalX1,X2,X4,X5,X6andX7
are 230 VAC.
• AllconnectionsonterminalX9arelowvoltageonly.
 
• Releasethetwoscrewsatthebottomofthefrontcasing
and remove the front casing.
• Feedthecablesthroughthegrommetinthebaseofthe
boiler.
• Connectthecablestotherelevantconnectors,asshownin
the diagrams.

• Isolatepowersupplyatthefusedspurbeforecarryingout
 anyworkontheboilercontrols.
2. Installation