Horstmann CentaurPlus C21 Series 2 User Operating Instructions Manual Download Page 4

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.

 

aLL day

 -   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 
CH once.
Programme 
goes from 
aUTO to  
aLL day

Programme 
will operate 
from 1st ON 
until 3rd OFF 
period

Press HW or 
CH again.
Programme 
goes from 
aLL day to 
24 HrS

Programme 
will be 
continuously 
ON

Press HW or 
CH again.
Programme 
goes from  
24 HrS to OFF

Programme 
will be 
continuously 
OFF

Press HW or 
CH again.
Programme 
goes from 
OFF to aUTO

Programme 
will return 
to normal 
ON and OFF 
times

4

AUTO
ALL DAY
24 HRS
OFF

6:35

PM

HW CH

HW CH

HW CH

HW CH

AUTO
ALL DAY
24 HRS
OFF

6:35

PM

AUTO
ALL DAY
24 HRS
OFF

6:35

PM

AUTO
ALL DAY
24 HRS
OFF

6:35

PM

Summary of Contents for CentaurPlus C21 Series 2

Page 1: ...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 pr...

Page 2: ...ch period symbol 4 SET button 5 Hot Water BOOST or adjust button 6 Central Heating ADVANCE or adjust button 7 Hot Water HW programme select button or ENTER button 8 Central Heating CH programme select...

Page 3: ...d Fully Pumped or Gravity System The installer will have set the programmer to suit the installed system This is normally a Fully Pumped system which will allow independent control of the central heat...

Page 4: ...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 illus...

Page 5: ...Use the and buttons to adjust the minutes and press ENTER Use the and buttons to set the date and press ENTER Use the and buttons to set the month and press ENTER Use the and buttons to set the year...

Page 6: ...e 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 programme...

Page 7: ...der 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 Tim...

Page 8: ...Email sales horstmann co uk Website www horstmann co uk Horstmann Controls Limited Bristol BS4 1UP Leaflet number P84362 Issue 1 8...

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