operating instructions model: prt / prt-n version 3

Operating InstructionsModel: PRT / PRT-N

Version 3

01/10 Revision 2

Ref: PRTV3

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Contents Page

Whatisaprogrammablethermostat? 2-4 Installation 5-6 Iconsexplained 6 TemperatureDisplay 7 SettingtheClock 7 SettingtheComfortLevels 8-9 KeypadLockFacility 9 TemperatureHold 10 SettingtheTemperature 10 HolidayFeature 11 TurningtheHeatingOn/Off 12 FactoryReset 12 OptionalThermostatSettings 13-17 Re-calibratingtheThermostat 18 Wiring 19-23

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What is a programmable room thermostat?

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

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

Turningaprogrammableroomthermostattoahighersettingwillnotmaketheroomheatupanyfaster.Howquicklytheroomheatupdependsonthedesignoftheheatingsystem,thesizeoftheboilersandradiators.

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Neitherdoesthesettingaffecthowquicklytheroomcoolsdown.Turningaprogrammableroomthermostattoalowersettingwillresultintheroombeingcontrolledatalowertemperature,andsavesenergy.

Thewaytosetanduseyourprogrammableroomthermostatis to find the lowest temperature settings that you are comfortablewithatthedifferenttimesyouhavechosen,andthenleaveitalonetodoitsjob.

Thewaytosetanduseyourprogrammableroomthermostatisto find the lowest temperature setting you are comfortable with, andthenleaveitalonetodoitsjob.Thebestwaytodothisistosettheroomthermostattoalowtemperature–say18°C–andthenturnitupby1°Ceachdayuntilyouarecomfortablewiththetemperature.Youwon’thavetoadjustthethermostatfurther.Anyadjustmentabovethissettingwillwasteenergyandcostyoumoremoney.

Ifyouheatingsystemisaboilerwithradiators,therewillusuallybeonlyoneprogrammableroomthermostattocontrolthewholehouse.Butyoucanhavedifferenttemperatures

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inindividualroomsbyinstallingthermostaticradiatorvalves(TRVs)onindividualradiators.Ifyoudon’thaveTRVs,youshouldchooseatemperaturethatisreasonableforthewholehouse.IfyoudohaveTRVs,youcanchooseaslightlyhighersettingtomakesurethateventhecoldestroomiscomfortable,thenpreventanyoverheatinginotherroomsbyadjustingtheTRVs.Thetimeontheprogrammermustbecorrect.SometypeshavetobeadjustedinspringandautumnatthechangesbetweenGreenwichMeanTimeandBritishSummerTime.

Youmaybeabletotemporarilyadjusttheheatingprogramme,forexample,“Override”,“Advance”or“Boost”.Theseareexplainedinthemanufacturersinstructions.

Programmable room thermostats need a free flow of air to sensethetemperature,sotheymustnotbecoveredbycurtains or blocked furniture. Nearby electric fires, televisions, wallortablelampsmaypreventthethermostatfromworkingproperly.

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Installation ProcedureDo’s1. Domountthethermostatateyelevel.2. Doreadtheinstructionsfullysothatyoucangetthebest

fromourproduct.

Don’ts1. Donotinstallnearadirectheatsourceasthiswillaffectthe

workingsofthethermostat.2. DonotpushhardontheLCDotherwiseyouwilldamagethe

liquidcrystaldisplayandthisisnotrepairable.

Installation

The thermostat is designed to be flush mount, a back box of 35mmshouldhavebeensunkinthewallpriortoinstallation.

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

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Step2Placethethermostatfrontsomewheresafe.Terminatethethermostatasshowninthediagramsatthebackofthisbooklet.

Step3Clipthefrontofthethermostattothebackplate.

Icons Explained

Symbol Description

Heat On Icon Shown when the heating is On Flashing when the optimum starts 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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Temperature DisplayRoom Temp=Thisisthecurrentroomtemperature.

SET=Thisisthetemperatureyouaretryingtoachieveinyourhome.

Setting the ClockTosettheclock,followthestepsbelow.

• Withthethermostatturnedon,presstheClockbuttontwice.• YouarenowabletosettheminutesusingtheUp/Down

keys.• PressHtoaccept.• YouarenowabletosetthehoursusingtheUp/Downkeys.• PressHtoaccept.• YouarenowabletosetthedayoftheweekusingtheUp/

Downkeys.• PressAtostoreandexit.

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Comfort Levels ExplainedTheHeatmiserPRTprovidesWeekday/Weekendor7DayProgramming. You should consult the “Configuration Menu” sectiontoselecttherequiredmode.

Thethermostatissuppliedwithcomfortlevelsalreadyprogrammed,butthesecanbechangedeasily.Thedefaulttimesare:

08.00-21°C(Wake)09.30-16°C(Leave)16.30-22°C(Return)23.00-17°C(Sleep)

Ifyouonlywanttouse2levels,youshouldprogramtheunusedlevelsto--.--

• Tobeginprogrammingthecomfortlevels,pressClockOnce.• IfyourthermostatissetupforWeekday/Weekend

Programming,youwillseeMon-Frishown.For7dayprogrammingyouwillseeMonday.

• UsingtheUp/Downarrowkeys,entertherequiredWaketime.

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• PressH.• UsingtheUp/Downarrowkeys,entertherequiredWake

Temperature.• PressH.• Youwillnowsee“Leave”.• Youshouldrepeattheprogrammingforeachperiod,

entering--.—forunusedperiods.

Note:Forweekday/weekendProgramming,the4comfortlevelsarethesameforallweekdays.For7dayprogramming,eachdaycanhave4differentcomfortlevels.

Locking The Thermostat

Thethermostathasakey-lockfacility.Toenablefollowthesesteps:

• PressandholdtheAandDownKeyfor10seconds.• Youwillseethelocksymbolappear.• Tounlock,repeatthestepsabove.

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Temperature HoldThetemperatureholdfunctionisidealforpartiesorwhenyouwillbegoingoutforanumberofhours.Itallowsyoutoholdatemperatureforadesiredperiod.

• PressH.• UsingtheUp/Downarrowkeysentertherequiredholdtime.• PressH.• UsingtheUp/Downarrowkeysentertherequiredhold temperature.• PressAtoaccept.

YouwillseetheHoldindicationisdisplayedwhichwillcountdowntheholdduration.

Tocancel,reducetheHoldtimeto00hours.

Temperature SetUsingtheUporDownarrowkeysallowsyoutoadjustthesettemperature.Whenyoupresseitherofthesekeys,youwillseethewordSETandthedesiredtemperature.

PressAtoaccept.

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HolidayTheHeatmiserPRThasaholidayfunction.Thisallowsyoutoenteraholidaysetting.Duringaholiday,thethermostatwillmaintainthefrostsettemperature.Attheendofyourholiday,thethermostatwillrevertbacktotheprogrammedsettingensuringthatyourhomeiswarmonyourarrival.

• PressHthreetimes(Untilyouseethesuitcase).• UsingtheUp/Downarrowkeysenterthenumberofdays

holiday.• PressAtoaccept.

TheHeatmiserPRTwillshowasuitcaseindicatingthethermostatisinholidaymode.Tocancel,reducetheHolidaydurationto00days.

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Heat On / OffFrost Protect Mode:PressingthePowerbuttononcewillplacethethermostatinfrostprotectmode.Inthismode,thethermostatwilldisplaythefrosticonandwillonlyturntheheatingonshouldtheroomtemperaturedropbelowthesettemperature(seepage14)Shouldtheheatingbeturnedonwhilst in frost mode, the flame symbol will be displayed. To cancelthefrostprotectmode,presstheOnbutton.

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

Factory ResetThethermostathasafactoryresetfunction.Thiswillresetallsettingsbacktotheirfactorydefault.Toperformafactoryreset,followthesesteps:

• Turnthethermostatoff(Seeabove).• PressandholdthePowerandUparrowkeyuntiltheLCD

powersup.Alloftheiconswillbedisplayed.Whentheyhavedisappeared,thethermostathasbeenreset.

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THE FOLLOWING SETTINGS ARE OPTIONALAND IN MOST CASES NEED NOT BE ADJUSTED

Optional Features Explained

Feature 01 - Temperature Format:Thisfunctionallowsyoutoselectbetween°Cand°F.

Feature 02 – Switching Differential:Thisfunctionallowsyoutoincreasetheswitchingdifferentialofthethermostat.Thedefaultis1°Cwhichmeansthatwithasettemperatureof20°C,thethermostatwillswitchtheheatingonat19°Candoffat20°C.Witha2°Cdifferential,theheatingwillswitchonat18°Candoffat20°C.

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.Eachthermostatonyournetworkmusthaveauniquecommunicationaddress.Thiscanbesetfrom01-32.

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

Feature 08 – Sensor Selection:Thisthermostathasabuiltinairsensor.

Feature 09 – Floor Temp Limit:Thisfunctionisnotavailableonthismodel.

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Feature 10 – Optimum Start:Optimumstartwilldelaythestartupoftheheatingsystemtothelatestpossiblemomenttoavoidunnecessaryheating,sothatthedwellingiscomfortablywarmbytheprogrammedtime.Thethermostatusestherateofchange(seebelow)settingtocalculatehowlongthebuildingneedstotaketoraisethebuilding1°C(witharateofchangeof20,thethermostathascalculatedthebuildingneeds20minutestoraisethebuilding1°C).

Feature 11 – Rate of Change:Forinformationonly.

Feature 12 – Weekday/Weekend or 7 Day Programming:Thethermostatofferstwoprogrammingmethods.Weekday/Weekendallowsyoutoprogram4comfortlevelsfortheweekdayand4differentcomfortlevelsfortheweekend.In7dayprogrammode,eachdayhas4comfortlevelsthatcanbeprogrammedindependently.

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Adjusting the Optional Settings1. To access the configuration menu, turn off the thermostat

bypressingandholdingdownthePowerButton.Then,pressandholdtheClockbuttonuntilthedisplaylightsup.

2. Thesmallnumberisthefeaturenumber,thelargenumberisthesettingvalue.

3. Usetheclockbuttontocyclethroughthefeatures.4. UsetheUp/Downkeystochangethesetting.5. PressAtoacceptandstore.

Feature Table Feature Description Setting

01 TemperatureFormat 00=°C 01=°F

02 SwitchingDifferential 01-03°C 01°CDefault

03 FrostMode 00=Enabled 01=Disabled (00=Default)

Feature Table (continued) 04 FrostTemperature 07-17°C (12°CDefault)

05 OutputDelay 00-15Minutes (00Default)

06 CommunicationID SetUniqueComms Address01-32

07 Up/DownTempLimit 00-10°C (00°CDefault)

08 SensorSelection Builtinsensor

09 FloorLimitingSensor Notusedonthismodel

10 OptimumStart 00-03(00hoursdefault)

11 RateofChange Informationonly

12 Weekday/Weekend 00=Weekday/Weekend 01=7dayprogramming

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Re-calibrating the thermostat

Ifyouneedtore-calibratethethermostatfollowtheseinstructions:

1. Pressandholdthepowerbuttontoturnthethermostatoff.2. PressandholdBOTHthepoweranddownbuttonsuntilthe

temperatureappearsonthescreen.3. Usetheup/downbuttonstosetthenewtemperature.4. PressAtoaccept.5. Pressthepowerbuttononcetoturnthethermostatback

on.

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19

L N A1 A2

PRT

PRT 240V SWITCHING

LN E

BOILER

MAINS SUPPLY INN L E

RECOMMENDATIONSMAX CABLE SIZE 1.5MMBACK BOX DEPTH 35MMMAX LOAD 3 AMPS

20

LN NC NO

PRT

PRT 240V CHANGEOVER SWITCHING

N

VALVE


COM

EOPEN

CLOS

E

L NMAINS SUPPLY IN

21

L N A1 A2

PRT

PRT VOLTFREE SWITCHING

LN

E

BOILER

MAINS SUPPLY INN L E

Boiler thermostat ortimeclock connections


22

+ A1A2 - RT1 RT2

Y B

COMMSCABLE

PRT-N 240V SWITCHING

12v

- + A2 B2

L E N C NC NO C NC NO

POWERED RELAY CARD

MAINS IN TO BOILER


LEN

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+ A1 A2 - RT1 RT2

Y B

COMMSCABLE

PRT-N VOLTFREE SWITCHING

12v

- + A2 B2

L E N C NC NO C NC NO

POWERED RELAY CARD

MAINS IN TO BOILER THERMOSTAT CONNECTIONS


SupportTel:01254870303

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operating instructions model: prt / prt-n version 3

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