REMEHA 18S Installation and Service Manual

Brand: REMEHA

Model: 18S

Category: Water heaters & boilers

Type: Installation and Service Manual

This manual is also suitable for

127768-271011



Great Britain











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

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

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

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. 0800 111 999





• 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

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

Remeha Avanta Plus

127768-271011

Instructie service

AvantaPlus

112952LTGBW7H011b

400

min.600 300

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

Remeha Avanta Plus

127768-271011

73.3(2x)

180.75

200

312.5

71.5

328.5

379

584106

670

26.5

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

Remeha Avanta Plus

127768-271011

73.3(2x)

79.8(2x)

114

180.75

200

247.5

312.5

71.5

328.5

379

74.5

584106

400

160

300

132.5

670

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

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

Remeha Avanta Plus

127768-271011

Residual head UPR 15-60

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

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 0 to 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

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

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

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

MAINS WATER EXPANSION VESSEL:

A Mini expansion vessel

B Mains water inlet pipe

C Non-return valve

D Boiler

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

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

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

Remeha Avanta Plus

127768-271011

R000150-A

600 mm

2000 mm

D,E

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

Roof mounted

room sealed

terminal

112952LTGBW7H066a

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

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

Roof mounted

room sealed

terminal

112952LTGBW7H066a

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

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

Remeha Avanta Plus

127768-271011

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).





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

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REMEHA 18S Installation and Service Manual

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Model: 18S

Category: Water heaters & boilers

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