CentaurPlus C21 User Operating Instructions
Contents
1. HORSTMANN CentaurPlus C21 User Operating Instructions Two Channel Central Heating and Hot Water Programmer CENTAURPLUS C21 nw i ADVANCI ee HORSTMANN The Horstmann C21 two channel programmer gives independent control over hot water and heating with up to 3 ON OFF settings per 24 hours It also has a 1 hour manual boost button for the hot water and an advance button for the central heating There is also a programming switch allowing permanent selection of OFF ON AUTO ALL DAY The CentaurPlus C21 Programmer The simple instructions contained in this user guide are designed to help with the programmi ng and operation of the unit 00 0 b PM e ie e ADVANCE HORSTMANN a C21 1 2 3 4 5 6 7 8 SET button Central Hea Central Hea 9080 SET indicator RUN is the normal position Time of day Switch period symbol Hot Water BOOST or adjust button ing ADVANCE or adjust button Hot Water HW programme select button or ENTER button ing CH programme select button 9 Hot Water ON indicator 10 Central Hea 11 SET positions 12 PROGRAM ing ON indicator E positions 13 BOOST symbol 14 ADVANCE symbol 15 AM PM symbol 16 PROGRAMME indicators Fully Pumped or Gravity System The installer will have set the programmer to suit the installed system This is normally a Fully Pumped syst2. Leaflet number P60497 Issue 5
3. FF times accordingly If not press ENTER twice It may not be possible to programme heating and hot water independently on certain systems Resetting the Programmer Electronic equipment can in some circumstances be affected by electrical interference If the programmer s display becomes frozen or scrambled or if you wish to revert back to the default time settings please reset by pressing the SET and CH buttons together as shown below After initial installation it is advisable before programming the CentaurPlus for the first time to reset the unit Resetting can only be achieved with the power ON by pressing the SET and CH buttons together This will return the programmer to the factory set default times Press the SET and CH buttons together then release the buttons and the programmer will return to preset factory settings General Information BATTERY The programmer is fitted with a non rechargeable long life battery which will maintain the programmed time settings for a minimum of ten months with the supply disconnected THIS SHOULD BE SUFFICIENT TO COVER POWER INTERRUPTIONS DURING THE LIFE OF THE UNIT During power interruptions the display will be blank after 3 days the current time of day will be lost These measures are to prolong the battery life SERVICE AND REPAIR This programmer is NOT user serviceable Please do not dismantle the unit In the unlikely event of a fault developing please refer to the RESE
4. TTING THE PROGRAMMER section of this user guide shown above If this fails to resolve the problem please contact a local heating engineer or a qualified electrician What is a programmer an explantion for householders Programmers allow you to set On and Off time periods Some models switch the central heating and domestic hot water on and off at the same time while others allow the domestic hot water and heating to come on and go off at different times Set the On and Off time periods to suit your own lifestyle On some programmers you must also set whether you want the heating and hot water to run continuously run under the chosen On and Off heating periods or be permanently off The time on the programmer must be correct Some types have to be adjusted in Spring and Autumn at the changes between Greenwich Mean Time and British Summer Time You may be able to temporarily adjust the heating programme for example Override Advance or Boost These are explained in the manufacturer s instructions The heating will not work if the room thermostat has switched the heating off And if you have a hot water cylinder the water heating will not work if the cylinder thermostat detects that the hot water has reached the correct temperature 8 HORSTMANN Email sales horstmann co uk Website www horstmann co uk Horstmann Controls Limited Bristol BS4 1UP C
5. W CH Press ADVANCE button once to ME auto ALL DAY 24 HRS move to the again This will return the unit CH PROG ADVANCE OFF to its normal next ON OFF time programme Programme Override Facilities With the CentaurPlus C21 programmer operating in the normal running mode it is possible to alter the functionality of the programme on each individual channel by means of the CH and HW buttons The options include AUTO Channel follows all programmed ON and OFF times ALLDAY Channel operates from 1st ON time until 3rd OFF ignoring all switching times in between 24hrs Channel will be constantly ON OFF Channel will be constantly OFF there is the ability to turn off the heating during the summer without altering the programme times On the hot water channel the boost is still available As both channels are totally independent it is possible to have them set differently if necessary All of the settings above will be permanent i e unaffected by programme times until alteration by the user The diagram below illustrates how to alter the setting it assumes that the channel is in the AUTO mode to begin with Press HW or Press HW or CH once CH again Programme Programme goes from goes from AUTO to ALL DAY to ALL DAY 24 HRS Press HW or Press HW or CH again CH again Programme Programme goes from goes from 24 HRS to OFF OFF to AUTO Pr
6. em which will allow independent control of the central heating and hot water however on an old Gravity system the central heating and hot water are linked so that it is not possible to use the central heating independently This will allow only one common time setting for both hot water and central heating and will become apparent when setting the ON and OFF times as both will be indicated together Manual Overrides BOOST FUNCTION 1 HOUR TEMPORARY OVERRIDE HOT WATER ONLY The boost facility will allow the user to boost the hot water channel which is currently OFF for 1 hour To indicate the boost being activated BOOST will be shown on the display for the duration of the boost period The hot water channel ON indicator will also be illuminated At any time during a BOOST period press Press BOOST button once for 1 hour of hot water BOOST again to return to normal programming ADVANCE FUNCTION BRINGS FORWARD THE NEXT ON OR OFF OPERATION CENTRAL HEATING ONLY The advance facility will allow the user to switch the central heating channel ON which is currently OFF or switch the central heating channel OFF which is currently ON To indicate the advance feature being activated ADVANCE will be shown on the display until the next programme switching time The central heating ON indicator will also be illuminated To cancel the advance press the ADVANCE button RUN lt cc MM 6 35 HW PROG H
7. ogramme will return to normal ON and OFF times Programme will operate from 1st ON until 3rd OFF period Programme will be continuously ON Programme will be continuously OFF HW CH HW CH HW CH HW CH AUTO AUTO AUTO AUTO ALL DAY ALL DAY ALL DAY ALL DAY 24 HRS 24 HRS 24 HRS 24 HRS OFF OFF OFF OFF Setting the Time of Day Press the SET button until SET indicator Press the SET button until SET indicator is Use PLUS and MINUS buttons Press ENTER is next to RUN position next to CLOCK position to adjust time RUN RUN y CLOCK CLOCK HW PROG HW PROG CH PROG CH PROG DEFAULT TIME SETTINGS 1st ON 1st OFF 2ndON 2ndOFF 3rdON 3rd OFF 6 30AM 8 30AM 12 00PM 12 00PM 4 30PM 10 30PM The default time settings shown above are preset at the factory Setting the On and Off Times To alter these settings please proceed as follows Press the SET button until Use PLUS and Use PLUS and SET indicator MINUS buttons MINUS buttons is next to the to adjust to adjust HW or CH PROG 1st ON time 1st OFF time position Repeat this Press the SET Sake for button until RUN p SET indicator BLOCK ang onward is returned to peris ip settings CH PROG RUN position NB The factory default settings for the 2nd ON OFF times are both set at 12 00pm midday which cancels this ON period giving 2 ON OFF periods for 24hrs If a midday ON period is required set the 2nd ON and O
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