Operating InstructionsModel:

PRT2-TS / PRT2-NTS EU

01/11 Revision 1

Ref: PRT2-TS EU

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Contents Page

DisplaySymbolsExplained 5

TemperatureDisplay 8

SettingtheClock 8

ComfortLevelsExplained 9

LockingtheKeypad 12

TemperatureOverride 12

TemperatureHold 13

Holiday 14

HeatOn/Off 15

CleanScreen 15

FactoryReset 16

OptionalFeatureSetup 17-22

WiringDiagrams 23-24

What is a programmable room thermostat?

Aprogrammableroomthermostatisbothaprogrammerandaroomthermostat.Aprogrammerallowsyoutoset“On”and“Off”timeperiodstosuityourownlifestyle.Aroomthermostatworksbysensingtheairtemperature,switchingontheheatingwhentheairtemperaturefallsbelowthethermostatsetting,andswitchingitoffoncethissettemperaturehasbeenreached.

So,aprogrammableroomthermostatletsyouchoosewhattimesyouwanttheheatingtobeon,andwhattemperatureitshouldreachwhileitison.Itwillallowyoutoselectdifferenttemperaturesinyourhomeatdifferenttimesoftheday(anddaysoftheweek)tomeetyourparticularneeds.

Turningaprogrammableroomthermostattoahighersettingwillnotmaketheroomheatupanyfaster.Howquicklytheroomheatsupdependsonthedesignoftheheatingsystem,forexample,thesizeoftheboilerandradiators.

Neitherdoesthesettingaffecthowquicklytheroomcoolsdown.Turningaprogrammableroomthermostattoalower

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settingwillresultintheroombeingcontrolledatalowertemperature,andsavesenergy.

Thewaytosetanduseyourprogrammableroomthermostat is to find the lowest temperature settings that youarecomfortablewithatthedifferenttimesyouhavechosen,andthenleaveitalonetodoitsjob.

The best way to do this is to set low temperatures first, say 18ºC,andthenturnthemupbyonedegreeeachdayuntilyouarecomfortablewiththetemperatures.Youwon’thavetoadjustthethermostatfurther.Anyadjustmentabovethesesettingwillwasteenergyandcostyoumoremoney.

Ifyourheatingsystemisaboilerwithradiators,therewillusuallybeonlyoneprogrammableroomthermostattocontrolthewholehouse.Butyoucanhavedifferenttemperaturesinindividualroomsbyinstallingthermostaticradiatorvalves(TRVs)onindividualradiators.Ifyoudon’thaveTRVs,youshouldchooseatemperaturethatisreasonableforthewholehouse.IfyoudohaveTRVs,youcanchooseaslightlyhighersettingtomakesurethat

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eventhecoldestroomiscomfortable,thenpreventanyoverheatinginotherroomsbyadjustingtheTRVs.Thetimeontheprogrammermustbecorrect.SometypeshavetobeadjustedinspringandautumnatthechangesbetweenGreenwichMeanTimeandBritishSummerTime.

Youmaybeabletotemporarilyadjusttheheatingprogramme,forexample,“Override”,“Advance”or“Boost”.Theseareexplainedinthemanufacturer’sinstructions.

Programmable room thermostats need a free flow of air tosensethetemperature,sotheymustnotbecoveredby curtains or blocked by furniture. Nearby electric fires, televisions,wallortablelampsmaypreventthethermostatfromworkingproperly.

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Display Symbols Explained

Symbol Description

Heat On Icon Shown when the heating is On Flashing when the optimum start is in operation. Frost On Icon (Heating Off) Shown when the heating is switched off and is protecting against frost only Keylock Icon Shown when the keypad is locked

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Installation ProcedureDO’s1.Domountthethermostatateyelevel.2.Doreadtheinstructionsfullysothatyougetthebest

fromourproduct.

DON’Ts1.Donotinstallnearadirectheatsourceasthiswillaffect

theworkingsofthethermostat.2.DonotpushhardontheLCDotherwiseyouwilldamage

theliquidcrystaldisplayandthisisnotrepairable.

InstallationThe thermostat is designed to be flush mount, a back boxof35mmshouldhavebeensunkinthewallpriortoinstallation.

Step1Carefullyseparatethefronthalfofthethermostatfromtheback plate by placing a small flat head terminal driver in to theslotsonthebottomfaceofthethermostat.

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Step2Carefullyunplugtheribbonconnectorwhichispluggedintothefronthalfofthethermostat.

Placethethermostatfronthalfsomewheresafe.Terminatethethermostatasshowninthediagramsatthebackofthisbooklet.

Screwthethermostatbackplateontothebackbox.

Step3Re-connectthethermostatribboncableandclipthetwohalvestogether.

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Temperature DisplayThePRT2-TSprovidescontrolof2zones.Thezoneselectedisunderlined,youcanselectadifferentzonebypressingZone1orZone2.

Room Temp=Thisisthecurrentroomtemperature.

SET=Thisisthetemperatureyouaretryingtoachieveinyourhome.

Setting The ClockTosettheclockinyourthermostat,followthestepsbelow:

• Withthethermostatturnedon,pressPROG.• PressClock.• UsetosetthecorrectTime.• PressDaytosetthecorrectDay.• PressDonetoacceptandstore.

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Comfort Levels Explained

Comfortlevelsallowyoutosetdifferenttemperaturesthroughouttheday.Forexample,youmaywantthehomewarminthemorningwhenyouaregettingreadyforwork,coolerduringthedaywhenthehouseisunoccupiedandthenwarmerintheeveningwhenyouarehomerelaxing.Thethermostatoffers5/2DayProgramming(4levelsfortheweekday,4fortheweekend)and7dayProgramming(4levelsforeachday).Seepages17-22fordetailsonhowtoswitchbetweenthesemodes.

Tip!Ifyoudon’twanttouseallofthecomfortlevels,justsetthetimeto--.—andthethermostatwillignorethissetting.

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Factory Programmed Comfort Levels

Thefollowingcomfortlevelsareprogrammedalready,howeveryoucanchangethemeasily.

Weekday Level Time TempWake 08.00 21°CLeave 09.30 16°CReturn 16.30 22°CSleep 23.00 17°C

Weekend Level Time TempWake 09.00 21°CLeave 22.00 16°CReturn --.-- --°CSleep --.-- --°C

Changing the Comfort Levels

• SelecttheZoneyouwishtoalter,thezoneselectedwillbeunderlined.

• PressPROGandselectWake.

• Usetosetthetimeforthe1stComfortlevel.

• Usetosetthetemperaturein°C.

• YoushouldnowrepeatfortheLeave,Return&Sleeplevels.

• PressDaytoselectthenextday.In5/2daymodethethermostatwillhighlight“SatSun”promptingyoutoprogramthetemperaturelevelsfortheweekend.In7daymode,thethermostatwillhighlightTuesday.

• Whencomplete,pressDonetoStoreandExit.

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Locking the Keypad

Thethermostathasakeylockfacility.Toenablethispressthebottomrightcornerofthedisplayandholdfor10seconds.

Whenactivated,youwillsee.Tocancel,repeatthestepsabove.

Temperature Override

Usingthekeysallowsyoutoadjustthesettemperature.Whenyoupresseitherofthesekeys,youwillseethewordSETandthedesiredtemperature.PressDonetoaccept.

Note:Youshouldnotethatthisnewtemperatureismaintainedonlyuntilthenextprogrammedcomfortlevel.Atthistime,thethermostatwillrevertbacktotheprogrammedlevels.

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Temperature HoldTheTemperatureHoldfunctionisidealforpartiesorwhenyouwillbegoingoutforanumberofhours.Itallowsyoutoholdatemperatureforadesiredperiod.

• PressHOLD.• Thezoneselectedisunderlined,youcanselecta

differentzonebypressingZone1orZone2.• SetthedesiredHoldtimeandtemperature.• PressDone.• Tocancel,repeatthestepsaboveandreducethetimeto

00.00.

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HolidayTheHolidayfunctionreducesthesettemperatureinyourhometothefrosttemperaturesetting.Thethermostatwillmaintainthistemperatureforthedurationoftheholidayandwillthenautomaticallyreturntotheprogrammodeonyourreturn.

AssumeyouprogramaholidayonMondayfor1day,theholidaywillstartimmediately,butthethermostatwillcountthenextday(Tuesday)astheholiday.ThethermostatwillthenrevertbacktoitsprogramatMidnightTuesday.

• PressHOLIDAY.• Enterthedurationofyourholiday.• PressDone.• TocancelaHoliday,reducetheHolidaytimeto00days.

TheHolidayfunctionworksindependentlyforeachzone.

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Heat On / Off

Frost Protect Mode:PressingtheOffbuttononcewillplacethethermostatinfrostprotectmode.Inthismode,thethermostatwilldisplaythefrosticonandwillonlyturntheheatingonshouldtheroomtemperaturedropbelowthesetfrosttemperature(seepages17-22).Shouldtheheatingbe turned on whilst in frost mode, the flame symbol will be displayed.Tocancelthefrostprotectmode,presstheOnbutton.

Thermostat Off:Toturnthethermostatoffcompletely,pressandholdtheOffbutton.Thedisplayandheatingoutputwillbeturnedoff.Toturnthethermostatbackon,presstheOnbutton.

Clean Screen

PressingCleanScreenwilldisableallbuttons,allowingyou15secondstowipethescreenclean.

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Factory ResetWhenthethermostatison,pressandholdtheSCREENbuttonfor10secondsandwhenyouseealltheiconsappear,presstheDONEbutton.Thescreenwillgoblank-thethermostathasbeenresetbacktothefactorydefaults.Pressthepowerbuttontoturnthethermostatbackon.

Re-calibrating the thermostatIfyouneedtore-calibratethethermostatfollowtheseinstructions:

1. PressandholdthePowerbuttontoturnthethermostatoff.

2. Selectthezonetocalibrate.3. PressandholdthePowerbuttonuntilthetemperature

appearsonthescreen.4. Usetheup/downbuttonstosetthenewtemperature.4. PressDONEtoaccept.5. PressthePowerbuttononcetoturnthethermostatback

on.

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THE FOLLOWING SETTINGS ARE OPTIONAL AND IN MOST CASES NEED NOT BE ADJUSTED

Optional Features Explained

Feature 01 – Temperature Format:Thisfunctionallowsyoutoselectbetween°Cor°F.

Feature 02 - Switching Differential:Thisfunctionallowsyoutoincreasetheswitchingdifferentialofthethermostat.Thedefaultis1°Cwhichmeansthethermostatwillswitchtheheatingon1°Cbelowthesettemperatureandwillturnitoffwhenthesettemperatureisachieved.Witha2°Cdifferential,theheatingwillswitchon2°Cbelowthesettemperatureandwillswitchoffwhenthesettemperatureisachieved.

Feature 03 - Frost Protect:Youcansetwhetherthethermostatwillmaintainthefrosttemperaturewhenthethermostatdisplayisturnedoff.Asadefault,thisisenabled.

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Feature 04 – Frost Protect Temperature:Thisisthetemperaturemaintainedwhenthethermostatisinfrostmode.Therangeis07-17°C.Thedefaultis12°Candissuitableforalmostallapplications.

Feature 05 – Output Delay:Topreventrapidswitching,anoutputdelaycanbeentered.Thiscanbesetfrom00-15minutes.Thedefaultis00whichmeansthereisnodelay.

Feature 06 – Communication Address:Thissettingisusedwhenyouhaveconnectedyourthermostattoanetworksystem.Eachthermostatonthenetworkmusthaveauniquecommunicationaddress.Thiscanbesetfrom01-32.

Feature 07 – Temperature Up/Down Limit:Thisfunctionallowsyoutolimittheuseoftheupanddowntemperaturearrowkeys.Thislimitisalsoapplicablewhenthethermostatislockedandsoallowsyoutogiveotherslimitedcontrolovertheheatingsystem.

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Feature 08 – Optimum Start:Optimumstartwillbringtheheatingonearlyifneeded,sothehouseiswarmwhenyouwakeup.Thismeansyoudon’tneedtoallowanyextraheatuptimewhenprogrammingthecomfortlevels.Thethermostatwillautomaticallylearntherequiredheatuptimeandwilladjustitself,ifrequired,throughouttheyear.

Feature 09 – Rate Of Change:Thisisthenumberofminutesthethermostathascalculatedittakestoraiseyourbuilding1°C.Thethermostatwillcontinuetolearntheheatuptimeofyourhomeandwilladjustthissettingtosuit.

Feature 10 – 5/2 Day 7 Day Programmable:Thisfunctionallowsyoutoswitchbetween5/2dayor7dayprogramming.5/2daymeansyoucanprogram4comfortlevelsfortheweekdayand4differentlevelsfortheweekend.7dayprogrammingallowsyoutoprogram4temperaturelevelsforeachdayoftheweek.

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Adjusting the Optional Settings

Toadjustthesettings,followthesesteps:

• Withthethermostatturnedon,pressPROG.

• PressSETUP.

• Usetheatthetopofthescreentoselectthefeaturenumber(shownonpages21-22).

• Asthisthermostatoperatestwozones,youshouldselectzoneoneorzonetwotosetuptheparametersforthatzone.

• Usetheinthecentretoadjustthesetting.

• PressDonetoacceptandStore.

(NB:Ifyoudon’tseethezoneselectbuttons,itmeansthesettingisaglobalsettingandthesettingwillbeappliedtobothzones)

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Feature Table

Feature Description Setting

01 °C/°F TemperatureFormat

02 Switching 0.5=0.5°C-3.0=3°C Differential 1.0°C=Default

03 FrostProtect 00=Disabled01=Enabled (01=Default)

04 FrostTemp 07-17°C(12=Default)

05 OutputDelay Entervalue 00-15minutes(00=Default)

06 Comms# Enternumber01-32 Ensureeachzone hasaseperatecommsnumber

07 TempLimit 00-10°C

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Feature Table (continued)

Feature Description Setting

08 OptimumStart 00=Disabled(Default) (Preheat) 01=01hr02=02hr03=03hr

09 RateofChange Forinformationonly

10 5/2Day 00Default 7Day 01

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N L

LIVE

NEUTRAL

SUPPLY IN85V-230V AC

PRT2-TS

RT1-

LN

LN TO BOILER S/LTO BOILER S/L

HEATING VALVE

HEATING VALVE

P/LP/L

P/L = PERMANENT LIVES/L = SWITCHED LIVE

MAX LOAD 3 AMPS

FOR VOLTFREECONNECTIONSTAKE P/L AND S/LDIRECTLY TO THEBOILER

A2 A1B1B2

ZONE 2 PROBE

ZONE 1ZONE 2

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-A1 A2RT1+

12V

UH1Y

BA1

A2+

-Y

BA1

A2+

-

ZONE X

AIR

ZONE X

PRT2-NTS

USE CAT5-FTP BETWEEN THE THERMOSTATAND UH1.CONNECT THE SCREEN TO EARTH AT THEUH1 END

B1 A2

YELLOW WIRE = YBLUE WIRE = B

N.B. TERMINAL POSITIONS HAVE BEENCHANGED TO CLARIFY THE WIRING

Y B

ZONE 2PROBE

ZONE 1 ZONE 2

®