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Honeywell ST9420C User Manual

Honeywell ST9420C
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10
Note: When pressing the button the next ON or OFF marker may start to flash.
This indicates you have tried to set a time equal to one of the next programme times
already in the memory. Similarly, when pressing the
button the previous ON or
OFF marker may start to flash. This indicates you have tried to set a time equal to
one of the previous programme times. If this happens the ST9420C simply moves
both times together as long as you continue to press the
or buttons. Follow
the procedure in ‘Reviewing the Programme Times’ (page 9) to check and adjust
these times as necessary.
c.
‘SET OFF-TIME 1’ will be displayed and the first OFF 1 time will now be flashing. If
you do not wish to change the time, press the green
button and move to the next
step. Otherwise, use the
or buttons to change the time. Press the green
button to confirm the time is correct and move to the next step. ‘SAVED’ will be
displayed for a moment to confirm that any change has been saved to memory.
d. The remaining ON and OFF times (ON 2, OFF 2, ON 3, OFF 3) can be set by
using the
or buttons to change the time then the green button to
confirm the time is correct and move to the next step. If you do not wish to
change the time, just press the green
button to move directly to the next ON/
OFF time without making any changes.
e. After setting or reviewing the last off time, OFF 3, the message ‘COMPLETE’ will
be displayed to indicate the times for Monday have been set.
You now have a choice of how to set the programme for the next day:
Copying One Day’s Programme to Another Day (example Monday to Tuesday):
f. Whilst the day is showing Monday, Press the COPY DAY button. The message
‘COPY MON TO TUESDAY OK?’ will be displayed and the letters TUE will flash
to indicate the programme for Monday can be copied to Tuesday.
g. To select a different day to copy to, press the NEXT DAY button to cycle through
the days. With each press of the NEXT DAY button the message will change to
indicate the new day you are copying to.
h. When the required day is indicated, press the green
button to confirm, and
the message ‘MON COPIED’ will be displayed for a moment. The day into which
Mondays programme has been copied is now available to have its programme
edited.
Note: Once a day’s programme has been confirmed in this way, it now becomes the
day whose programme is copied if the COPY DAY button is pressed again.
OR
Programming a Different Day:
i. Press the NEXT DAY button to select the next day, which is displayed along the
top of the screen. The programme for that day can then be adjusted by following
steps be above. Programmes for the remaining days can be set in the same
way, using the NEXT DAY button to move to the next day.
PROGRAMMING YOUR ST9420C

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Honeywell ST9420C Specifications

General IconGeneral
ModelST9420C
CategoryThermostat
DisplayLCD
Channels2
Power Supply230V AC
MountingWall-mounted
Contact Voltage230V AC
Contact Current3A resistive, 1A inductive
Switching TypeSPDT
TypeProgrammer
Programs7-day programming
CompatibilityCompatible with most heating systems

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