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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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
RECOMMENDATIONSMAX CABLE SIZE 1.5MMBACK BOX DEPTH 35MMMAX LOAD 3 AMPS
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
RECOMMENDATIONSMAX CABLE SIZE 1.5MMBACK BOX DEPTH 35MMMAX LOAD 3 AMPS
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
RECOMMENDATIONSMAX CABLE SIZE 1.5MMBACK BOX DEPTH 35MMMAX LOAD 3 AMPS
LEN
23
+ 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
RECOMMENDATIONSMAX CABLE SIZE 1.5MMBACK BOX DEPTH 35MMMAX LOAD 3 AMPS
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SupportTel:01254870303
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