Riello TAU 35 UNIT User manual

cod. 20103686 rev. 2 05/16

TAU 35 UNIT

EN USER MANUAL

The following symbols are used in this manual:

9 = Identies actions that require caution and

adequatepreparation

0 = IdentiesactionsthatyouMUSTNOTdo

Thismanual,Code20103686Rev.2(05/16)ismadeupof

20pages.

CONTENTS

GENERAL ................................... 4

Precautions .......................................4

General safety information ...........................4

USER ...................................... 5

Controlpanel......................................5

Programming levels .................................8

Information levels ..................................8

Preparingforinitialstart-up ..........................11

Initialstart-up.....................................11

Temporaryshutdown............................... 13

Preparingforextendedperiodsofdisuse ............... 13

Errorcodes ...................................... 14

Completelistofparameters ..........................17

Cleaning ........................................ 18

Maintenance ..................................... 18

Dear heating engineer,

CongratulationsonhavingchosenaRboiler.Youhaveselectedamodern,qualityproductthatisdesignedtogive

dependable,efcientandsafeserviceandtoprovidecomfortinthehomeformanyyearstocome.Thismanualpro-

videsinformationthatisessentialtotheinstallationoftheappliance.Usedinconjunctionwithyourownknowledge

andexpertiseitwillenableyoutoinstalltheappliancequickly,easily,andcorrectly.

Onceagain,pleaseacceptourthanksandourcongratulationsonyourchoiceofproduct.

RielloS.p.A.

GENERAL

1.2 General safety information

0 Donotallowchildrenorin-

rm persons to operate

theboilerunsupervised.

0 Do not operate any

electrical devices or

equipment, including

switches or domestic ap-

pliances, etc., if you can

smell fuel or fumes. If you de-

tectanysuspicioussmells:

−Ventilate the room by opening all doors and

windows;

−Closethefuelshut-offcock;

−ReportthefaultimmediatelytotheRTechni-

calAssistanceServiceoraprofessionallyquali-

edheatingengineer.

0 Never clean or service theboilerwithout rst di-

sconnectingitfromthemainselectricitysupplyby

turningthemainpowerswitchOFF.

0 Neverpull,disconnect,ortwisttheelectricalcables

coming from the boiler even if it is disconnected

fromthemainselectricitysupply.

0 Do no obstruct or restrict the vents in the room

wheretheapplianceisinstalled.Adequateventi-

lationisessentialforcorrectcombustion.

0 Do not leave ammable sub-

stances or containers in the

room where the boiler is

installed.

0 Do not touch the boiler

when barefoot or wet.

0 Do not switch the boiler

off if outside temperature

dropsbelowZERO(riskoffre-

ezing).

9 This instruction manual and that for the installer

andTechnicalAssistanceServiceareintegralparts

of the boiler. They must be kept safe and must

ALWAYS accompany theboiler,evenif itissoldto

another owner or user or transferred to another in-

stallation. If you damage or lose this manual, order

a replacement immediately from your local R

TechnicalAssistanceCentre.

9 Thissystemmustbeinstalledbyalegallyqualied

heatingengineer(inItaly,thelawregulatingpro-

fessional heating engineers is Law 46 of the 5th

March 1990). On completion of

the installation, the installer

must issue the owner with

adeclaration of conformity

conrmingthattheinstal-

lationhasbeencompleted

to the highest standards

incompliancewiththein-

structions provided by R

in this instruction manual,

and that it conforms to all ap-

plicablelawsandstandards.

9 Ifyounoticeanywaterleakingfromtheboiler,di-

sconnectitimmediatelyfromthemainselectricity

supply,shutoffthewatersupply,andnotifyyour

localRTechnicalAssistanceCentreoraqualied

heating engineer immediately.

9 Periodicallycheckthatoperating

pressureinthewatercircuitis

over 1 bar. If water pressure

is consistently low, contact

R's Technical Assistance

Service or a professionally

qualiedheatingengineer.

9 If the boiler is not going to be

usedforanextendedperiodof

time,proceedasfollowstoprepa-

reitforshut-down:

−TurnthemainpowerswitchOFF

−Close the boiler's fuel cock and heating circuit

watercock

−Drain the central heating circuit if there is any

riskoffreezing.

9 Theboilermustonlybeusedforthepurposespeci-

edbyRandforwhichitisdesigned.Thema-

nufacturer declines all responsibility, contractual

orother,fordamagetopropertyorinjurytoper-

sons or animals caused by improper installation,

adjustment,maintenanceoruse.

Theoperationofanyappliancethatuseselectricalpowerdemandsthatanumberoffundamentalsafetyprecautions

berespected.

1 GENERAL

1.1 Precautions

USER

1 2 4 7 11 12 13 15143 5 8 9 106

1 Burnerlockoutindicator

2 DHWmodeselector(forusewithremotestoragecylinder:accessory)

3 Centralheatingorroomtemperaturesettingkey

4 DHWtemperaturesettingkey

 (forusewithremotestoragecylinder:accessory)

5 Resetkey.

 Restoresnormalfunctioningafterasafetyshutdown.

6 Chimneysweepmodeselection.

Pressandholdkeys3and4(forbetween3and6seconds)toenterchimneysweepmode.

7 Parameterselectionkeys

8 Parameterselectionkeys

9 Valuedecrement/incrementkeys

10 Valuedecrement/incrementkeys

11 Infokey

12 Display

13 Functioningmodeselectionbutton.

Alineappearsunderthesymbols:

s Automatic:theboilerfunctionsaccordingtothesetprogram

o Daytime:theboileroperatesatdaytime(comfort)setpoint

l Night-time:theboileroperatesatnight-time(reduced)setpoint

b Stand-by

14 Housingforcontroller(accessory)

15 Mainswitch

2 USER

2.1 Controlpanel

CONTROL PANEL AND SYMBOLS

USER

DISPLAY

A B H

FG E

A Water pressure reading (not used)

B Large numeric display

Displays current value.

C Chimney sweep or Service Required symbol

D Display symbols:

vDHW temperature or DHW mode active

rCH or room temperature setpoint, or CH mode active

cOutdoor temperature

oDaytime CH mode

lNight-time CH mode

fFlame detected

nError

E Small numeric display

Displays time, parameters and error codes

F Central heating modes:

sAutomatic: the boiler functions according to the set program

oDaytime: the boiler operates at daytime (comfort) setpoint

lNight-time: the boiler operates at night-time (reduced) setpoint

bStand-by

G DHW mode: ON or OFF

H Current time display

USER

F1 E1 H1

A1 FC1 D1B1

G1 I1

A1 Functioningmode.

Press the Mkeytoactivatethevariousmodes,asshownbythelineunderthe

 correspondingsymbol.

B1 DHW mode.

Press the VkeytoactivateanddeactivateDHWmode.

C1 Daytime CH mode

D1 Time of day

E1 Currentboilertemperature

F1 Waterpressure(notused)

G1 Flamedetected

H1 Current time bar

I1 CHmodeactive

L1 DHWmodeactive

MAIN SCREEN

Notesonfunctioning

ThecontrolpanelontheTAU UNITboilercontrolsthefollowingfunctions:

−TheDHWpriorityfunction. This ensures that the

boiler can still serve the central heating circuit

evenwhendomestichotwaterisdrawnoff.

−Thefrostprotectionfunction.

 Thisstopswaterfreezinginsidetheboiler.If

boilertemperaturefallsbelow5°C,theburner

ignitesandrunsatfullpoweruntiltemperature

reaches10°C.

 Thefrostprotectionfunctionisonlyactiveif

anoutdoortemperaturesensorisconnected.

Ifoutsidetemperaturedropsbelow-5°Cthe

pumpsareswitchedon.Ifoutsidetemperature

isbetween-4°and1.5°C,thepumpsare

switchedonfor10minutesatintervalsof6

hours.Ifoutsidetemperatureisabove1.5°Cthe

pumpsareswitchedoff.

−Overtemperaturedispersalfunction. If the tem-

perature threshold thermostat trips (86°C) the

boilershutsdownandaccumulatedheatisdi-

spersed by switching on the central heating

pump.Ifboilertemperaturerisesto89°C,thefan

isswitchedontoo.

−The cascade control function. The addition of a

controller (accessory) allows you to connect a

numberofboilersincascade,sharingheatou-

tputbetweenanumberofburnersandimpro-

vingoverallsystemefciency.

−Boiler switching differential. This establishes a

minimumofftimefortheburner,tostopitigni-

ting and shutting down repeatedly. The boiler

willonlystartupagainifthedifferencebetween

the setpoint and the actual boiler temperature

exceedsapredeterminedvalue.

USER

2.2 Programming levels

Therearethreeprogramminglevels:

−End user

−Installer

−Manufacturer.

Youmustfollowaprecisesetofinstructionstoaccessanyoftheselevels.Therelevantinstructions,completewitha

listofthekeystopress,areprovidedinthetablesbelow.

END USER LEVEL

Thislevelprovidestheparametersneededbytheenduser.Forexample,itcontainsparametersforsettingCHandDHW

functioningtimesandSummer/Wintermodeswitchingtemperature.

Seethe“Completelistofparameters”sectionforfurtherdetails.

Key Explanation

1 DU  PressoneofthesekeystoaccesstheENDUSERprogramminglevel

2DU  Pressoneofthesekeysuntilyoureachtheparameteryourequire:theexamplehere 

   showstheparameterPxx

3+-  Pressthesekeystochangethecurrentvalue.

To memorise the new value, you need to move on to another parameter.

 Pressoneofthesekeystoexittheenduserprogramminglevel.

Any new settings are not stored in memory.

Pressthiskeytoexittheenduserprogramminglevel.Anynewsettingsarestoredinmemory.

Note1: Ifnokeyispressedforabout8minutes,thedisplayautomaticallyreturnstothemainscreen.Anynew

settings made will not be saved.

Note2: anychangesaresavedifyouswitchtoanotherprogramminglevel

2.3 Information levels

BASIC INFORMATION LEVEL

Press the Ikeytoenterthebasicinformationlevel.PresstheIkeyagaintoscrollthroughthevalues

listed below.

Key Explanation

1 v  DHWtemperature

2 t   Waterpressure(notused)

3 X.   Functioningphase(seetable1)

4 c  Outdoortemperature

5 Ex   (Accessory)controllererrorcodes(seethe“Errorcodes”section)

6 r  Boilertemperature

7 MV Pressoneofthesekeystoreturntothemainscreen

USER

Functioning phases (table 1)

Displayed Description

00 Standby

 01 Ignitionprevented

 02 Fanstart

 03 Pre-ventilation

04 Wait time

 05 Pre-ignitiontime

 06 Safetytime,constant

07 Safety time, variable

10 Central heating mode

 11 Domestichotwatermode

12 Simultaneous CH and DHW mode

 20 Post-ventilationwithlastcontrolused

 21 Post-ventilationatpre-ventilationlevel

22 Home run (*)

 99 Burnerlockout(errorcodedisplayed)

(*) Home run = Boiler status after reset.

EXTENDED INFORMATION LEVEL 1: temperatures

Press the Ikey .

Press and hold both DUkeysforatleast3seconds.

Press one of the +-keysuntilyoureachtherequiredparameter.

Temperature

Nr Description

 b0 Controlboarderrorcode

 b1 Boilerreturntemperature

b 2 Not used

 b3 Fluegastemperature

 b4 Outdoortemperature

 b5 Compoundoutdoortemperature

 b6 Attenuatedoutdoortemperature

b 7 Not used

b 8 Reserved

 b9 Reserved

USER

EXTENDED INFORMATION LEVEL 2: process values

Press the Ikey.

Press and hold both DUkeysforatleast3seconds.

Press the Ukey.

Press one of the +-keysuntilyoureachtheparameteryourequire.

Process values

Nr Description

C 0 Reserved

 C1 Ionisationcurrent

 C2 Fanspeed

 C3 Fancontrolcurrent(PWM)

 C4 Relativeboilerheatoutput

 C5 Pumpsetpoint

 C6 Differentialcontrol

C 7 Reserved

C 8 Reserved

 C9 Reserved

EXTENDED INFORMATION LEVEL 3: assistance

Press the Ikey.

Press and hold both DUkeysforatleast3seconds.

Press the Ukeytwice.

Press one of the +-keysuntilyoureachtheparameteryourequire.

Assistance

Nr Description

d 0 Reserved

 d1 Twostageormodulatingcontrolsetpoint(PID)

 d2 Currentboilersetpoint

 d3 Roomtemperaturesetpoint

 d4 DHWsetpoint

 d5 Maximummodulationincentralheatingmode

 d6 Maximumfanspeedatmaximumcentralheatingpower

d 7 Reserved

d 8 Reserved

 d9 Reserved

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