USER GUIDE
TO BE LEFT
WITH USER
ST6400S
Full Programmer
42009084-008 R1
INTRODUCTION
The ST6400S programmer controls your central
heating system. It will enable you to select the
times when heating and hot water are switched
ON
and
OFF
.
FEATURES
•
24 hour heating programme.
•
Separate 24 hour hot water programme.
•
Two
ON/OFF
switching times per day.
•
Built-in programme with typical
ON/OFF
times for heating and hot water.
•
Override buttons for heating and hot water.
•
Extra hour buttons for heating and hot water.
•
Built-in battery to prevent loss of programme
and time during power cuts.
•
12 hour am/pm or 24 hour clock format.
INSTALLER SET FEATURES
•
Boiler Service Reminder.
•
Automatic Summer/Winter 1 hour time
change, from BST to GMT.
The ST6400S and other Honeywell controls in your
central heating system will provide comfortable
temperatures in your home when you want them.
12 HOUR AM/PM or 24 HOUR CLOCK DISPLAY
Your programmer can operate on 12 hour am/pm or
24 hour clock formats. To change the format, ensure
the
SETTING SLIDER
is in the
RUN PROGRAMME
position then press the
+
and
-
buttons together for
about 5 seconds. All the displayed times will be
automatically changed to the new format.
Repeating this procedure will change the clock
display back to the original format.
AUTOMATIC SUMMER/WINTER TIME CHANGE
If your programmer has been set to do so, it will
automatically change the clock from GMT to BST
overnight on the last Sunday of March and back
again in October. In March the clock will ‘spring’
forward by 1 hour, and in October it will ‘fall’ back
by 1 hour.
OPERATING YOUR PROGRAMMER
with Boiler Service Reminder / Shut-down Feature
For normal operation the
SETTING SLIDER
must be
in the
RUN PROGRAMME
position.
A red
INDICATOR LAMP
shows when the heating or
hot water is switched
ON
.
Two sliders are provided to select how the heating
and hot water are controlled.
The
HEATING SLIDER
has four positions:
OFF
- The Heating will remain
OFF
.
AUTO
- The heating will be switched
ON
and
OFF
automatically according to the heating
programme.
ONCE
- The heating will come
ON
at the first
programmed
ON
time and go
OFF
at the last
programmed
OFF
time.
CONT.
- The heating will remain
ON
continuously.
The
HOT WATER SLIDER
operates in the same
manner as described above for the
HEATING
SLIDER
.
OVERRIDE
The
OVERRIDE
buttons switch the heating or hot
water
ON
or
OFF
without altering the programme.
When the indicator lamp is
ON
, pressing the
OVERRIDE
button switches the heating or hot water
OFF
until the next programmed
ON
time.
When the indicator lamp is
OFF
, pressing the
OVERRIDE
button switches the heating or hot water
ON
until the next programmed
OFF
time.
EXTRA HOUR
The
EXTRA HOUR
buttons switch the heating or hot
water
ON
for up to 3 extra hours without altering the
programme. Pressing either button once will give
one extra hour, and the words
H1 HR
or
HOT WATER +1 HR
show on the display to confirm
the button has been pressed.
When the red indicator lamp is
OFF
, pressing the
EXTRA HOUR
button switches the heating or hot
water
ON
for just one hour.
When the red indicator lamp is
ON
, pressing the
EXTRA HOUR
button extends the programmed
ON
period by one hour.
Further presses of the
EXTRA HOUR
buttons will
increase the extra hour period by one hour for each
button press, up to a maximum of 3 hours. The
display will change to show the number of extra
hours, for example
H3 HR
or
HOT WATER
+2 HR
.
To cancel the extra hours, keep pressing the
EXTRA
HOUR
button until the
H (1,2 or 3) HR
or
HOT WATER + (1,2 or 3) HR
disappears from the
display.
POWER FAILURE
Your programmer has a built-in battery to ensure
correct operation after a mains supply power cut.
No action should be necessary following a power
cut of up to 4 days. Longer power cuts may require
you to re-programme.
BOILER SERVICE REMINDER
By Law, your gas boiler should be inspected once a
year to ensure it is operating safely. If the Programmer
has been set to do so, it will display a message on
the screen to remind you that a Boiler Service is due.
If the Service is overdue, the programmer may switch
off the heating system, to ensure your safety. If this
happens you
must
arrange an immediate Service
visit. Contact details should be listed below.
If your programmer screen
flashes this message every
few seconds, your Boiler
Service is due soon, and
you should arrange a service visit.
If your programmer screen
shows the words “
SERVICE
DUE
” then your boiler
service is
OVERDUE
and
you should arrange an immediate service visit.
If your programmer screen
shows the words “
SERVICE
DUE
” and “
OFF
” then your
boiler service is
OVERDUE
and the boiler has been switched off to ensure your
safety - you should arrange an immediate service visit.
If set to do so, it may be
possible to obtain limited
use of the boiler by pressing
the heating
EXTRA HOUR
button. Each button press will allow operation of the
boiler for 1 hour at a time, and the screen will display
the message “on:1H”, as shown above. However, you
should arrange an immediate service visit.
BOILER SERVICE CONTACT NUMBERS
Name
Telephone
Contact 1
Contact 2
FAULT INDICATION
If your programmer screen
shows this message, the
product has detected an
internal fault, and must be
replaced, so you should arrange an immediate
service visit.
SERVICE DUE
SERVICE DUE
AM
SERVICE DUE
DAYS
SERVICE DUE
