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Operating InstructionsModel:
PRT2-TS / PRT2-NTS EU
01/11 Revision 1
Ref: PRT2-TS EU
11
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
®
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