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Horstmann CentaurPlus C21 Manual page 2

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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 set-
tings please use the following procedure.
Press the SET and CH buttons together
then release the buttons and the programmer
will return to preset factory settings.
T T h h e e s s i i m m p p l l e e i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w a a r r e e d d e e s s i i g g n n e e d d t t o o h h e e l l p p w w i i t t h h t t h h e e p p r r o o g g r r a a m m m m i i n n g g o o f f t t h h e e u u n n i i t t . .
SETTING THE TIME OF DAY
Press the SET button until the
SET indicator is next to the
buttons to adjust time
CLOCK position.
RUN
CLOCK
12:00
PM
HW PROG
CH PROG
D D E E F F A A U U L L T T T T I I M M E E S S E E T T T T I I N N G G S S
1
ON 1
OFF 2
st
st
nd
6:30
8:30
12:00
A A M M
A A M M
The default factory settings are shown above, however if you wish to change these proceed as
instructed below.
SETTING THE ON AND OFF TIMES
Press SET button
Use PLUS and
until the SET
MINUS
indicator is next to
buttons to adjust
theCentral Heating
the 1st ON time.
or Hot Water
position
Repeat this
process for 2nd
and 3rd settings
Should you encounter any problems, please refer to the
Q Q u u e e s s t t i i o o n n a a n n d d A A n n s s w w e e r r section located on page 4.
P P a a g g e e 2 2
SET
Use
Press the SET button until
Press
PLUS and MINUS
the SET indicator is next to the
ENTER
RUN
CLOCK
6:35
PM
HW PROG
CH PROG
ON
2
OFF
3
ON
3
OFF
nd
rd
rd
12:00
4:30
10:30
P P M M
P P M M
P P M M
P P M M
Use the PLUS
and MINUS but-
Press
tons to adjust the
ENTER
1st OFF time.
Press SET button
RUN
until the SET
CLOCK
6:30
indicator is returned
HW PROG
AM
CH PROG
1
ON
to RUN position
Programming ON/OFF times
If a Heating or Hot water period is not required it can be cancelled by setting the ON and OFF
settings to the same time. Example ON 10:00am OFF 10:00am
CH
The SET indicator must remain in the RUN position for the following instructions.
The following actions work independently on either Hot Water or Central Heating.
Press SELECT once.
Programme goes from
AUTO to ALLDAY
RUN position.
Channel will operate
from first ON until last
OFF period
6:35
PM
Press
ENTER
Press ADVANCE button
to move to the next
Heating ON/OFF time
The installer will have set the programmer to suit the installed system. If this is a Fully pumped
system this will allow independent control of the Central heating and Hot water, however on a 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.
INFORMATION AND ADVICE
SPECIAL FEATURES
Press SELECT again.
Press SELECT again.
Programme goes from
Programme goes from
ALLDAY to 24 HRS
Channel will be
continuously ON
HW CH
HW CH
AUTO
AUTO
ALL DAY
ALL DAY
6:35
PM
24 HRS
PM
24 HRS
OFF
OFF
BOOST FUNCTION
-
1hour temporary override
At any time during a BOOST
Press BOOST button:
period press BOOST again to
Your Hot water will be
return to normal programming
Boosted for 1 hour
ADVANCE FUNCTION
-
Brings forward next ON or OFF operation
To cancel the advance press the ADVANCE
button again. This will return the unit to
its normal programme
FULLY PUMPED OR GRAVITY SYSTEM
Press SELECT again.
Programme goes from
OFF to AUTO
24 HRS to OFF
Programmer will return
Channel will be
to normal ON and OFF
continuously OFF
times
HW CH
HW CH
AUTO
AUTO
6:35
ALL DAY
6:35
ALL DAY
PM
24 HRS
24 HRS
OFF
OFF
HW CH
RUN
AUTO
6:35
CLOCK
ALL DAY
PM
HW PROG
24 HRS
BOOST
CH PROG
OFF
HW CH
AUTO
RUN
CLOCK
6:35
ALL DAY
PM
24 HRS
HW PROG
CH PROG
ADVANCE
OFF
P P a a g g e e 3 3

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