Danfoss FP735Si User manual

User Guide
Danfoss Heating
MAKING MODERN LIVING POSSIBLE
FP735Si
Electronic 3-Channel Full Programmer for
Heating and Hot Water with Service Interval Timer

FP735SI
2
FP735Si
Electronic 3-Channel Full Programmer for
Heating and Hot Water with
Service Interval Timer
For a large print version of these instructions
please call Marketing on 0845 121 7400.
Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other
printed material. All trademarks in this material are property of the respective companies.
Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
®
Certification Mark

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User Instructions
FP735Si
Electronic 3-Channel Full Programmer
Index
1.0 User Instructions .......................................................................................6
1.1 Display ...............................................................................................6
1.2 Preset programmes.......................................................................7
1.3 Before you start ..............................................................................7
1.4 Display preferences.......................................................................8
1.5 Setting the date and time...........................................................8
1.6 Accepting the preset programmes ...................................... 10
1.7 Before you change the preset programmes ..................... 10
1.7.1 Changing Zones.......................................................................... 11
1.7.2 Programming in 7-day mode ................................................. 12
1.7.3 Programming in 5+2 day mode ............................................ 13
1.7.4 Programming in 24 hour mode............................................. 14
1.7.5 Programming in A+B mode.................................................... 14
2.0 Advanced Functions ............................................................................. 17
2.1 Mode ............................................................................................... 17
2.2 Holiday mode............................................................................... 17
2.3 User overrides .............................................................................. 18
2.3.1 Move to next event .................................................................... 18
2.3.2 Extend by 1, 2 or 3 hours.......................................................... 19
2.3.3 Changing clock forwards and backward............................ 19
3.0 Advanced Programming..................................................................... 20
3.1 Overview of installer selectable features ........................... 20
3.1.1 Keyboard lock............................................................................... 20
4.0 Service Interval Timer.......................................................................... 20
5.0 Resetting the Unit.................................................................................. 21
6.0 INFO Button (COPY/i)............................................................................ 22

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The text below has been edited and approved by the
Plain English Campaign, who has issued a Crystal Mark
to be displayed with it.
What is a Programmer?
... an explanation for householders.
Programmers allow you to set ‘On’ and ‘O’ time periods. Some
models switch the central heating and domestic hot water on and
o at the same time, while others allow the domestic hot water and
heating to come on and go o at dierent times. Set the ‘On’ and
‘O’ 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 ‘O’ heating
periods, or be permanently o.
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.
This programmer works together with the room thermostats and
the hot water thermostat. When the room and/or the hot water
has reached its set temperature, the heating will go o. Even if the
programmer has set it on.

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(Event number when programming)
Channel Number
TIME
Days of Week (Numbers or Text)
1.0 User Instructions
1.1 Display
KEY TO SYMBOLS
Flame: shows when heating is on
Hourglass: shows during programming delays
Padlock: indicates keyboard is locked
Suitcase: indicates Holiday Mode is set
Clock: Timed Modes
Hand: Manual Modes
Alarm: Indicates alarm is active.
Also used for service due
3 on and 3 o events per day
2 on and 2 o events per day
1 on and 1 o event per day. All Day Mode
Timer (OFF) Mode
+ HRS: Extends function by 1, 2 or 3 hours
Timer (ON) Mode

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1.2 Preset Programmes
Your FP735Si comes ready programmed with a set of operating times
which often suit most people.
If you want, you can change any of these settings by following the
instructions on pages 12 to 17. First follow the steps on page 9 to set
your display preferences.
1.3 Before you start
Open the ap on the front of your
FP735Si. Using a non-metallic object,
press and release the recessed RESET
button (R/S).
NOTE: Your FP735Si features a backlight
on it’s display. Unless this has been
disabled or set to be on all the time, the
rst press of any button will cause the
backlight to come on. In order to action a
function, a repeat press of the button will
be required. All buttons will then operate
as normal until the unit is left untouched
for 2 minutes and then the next button
press will activate the backlight again.
Weekdays (Mon-Fri) Weekend (Sat-Sun)
Event Time Hot Water
and
Heating
Event Time Hot Water
and
Heating
1 06:30 1st ON 1 07:30 1st ON
2 08:30 1st OFF 2 09:30 1st OFF
3 11:30 2nd ON 3 11:30 2nd ON
4 13:30 2nd OFF 4 13:30 2nd OFF
5 16:30 3rd ON 5 16:30 3rd ON
6 22:30 3rd OFF 6 22:30 3rd OFF

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1.5 Setting the Time and Date
Setting the correct date and time
Your FP735Si incorporates a real time clock with calendar function
that automatically changes time in both Spring and Autumn. The
time and date is set in the factory, and does not normally require
adjustment. However, should it be found necessary to adjust time or
date for any other reason refer to the following instructions.
1.4 Display Preferences
Clock display (12 or 24 hr)
Press and hold Λand + buttons for 2-3
seconds until display changes.
(AM or PM will appear in 12 hr mode)
Days of the week (numbers or text)
Press Λand –to toggle between day
numbers and text
Date
Month
Year

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Setting the date
Press and hold Λand PROG buttons for 3
seconds, to display date.
The YEAR number will ash, use Λor Vto
correct the year (Fig 1).
Use -or +to move to MONTH, then use Λ
or Vto correct month (Fig 2).
Use - or +to move to DATE in month,
then use Λor Vto correct day in month
(Fig 3).
If you attempt to select an invalid date
the unit will reject it and apply the nearest
valid date. It is recommended that date is
set in the order, yy/mm/dd.
Setting the correct time
After setting the date press PROG to
display the time. The time display will
ash on and o. Use the +and -buttons
to set the correct time (press and hold to
change in 10 minute increments). (Fig. 4)
Fig. 3 Fig. 4
Fig. 1 Fig. 2

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Setting the correct day
The day of the week is set automatically
from the date. Press PROG button to
return to normal operation (RUN).
(Fig. 5)
1.6 Accepting the preset programmes
If you are happy to use the preset programmes on page 7, you do
not need to do anything else. To accept these settings just close the
front cover.
The unit is now in RUN mode (colon ashes in display) and the
heating will operate according to the preset programmes.
1.7 Before you change the preset programmes
Your installer will have set your unit to operate in either 7-day mode,
5+2 day mode or 24 hour mode. To tell which mode your unit is set
press PROG until Event 1 ashes in the display. The list of week days
at the bottom af the display indicates the chosen mode.
In 7-day mode (Fig. 7) you can
programme dierent settings for each
day of the week (see page 12).
Note: Only one day of the week is shown
in the display.
In 5+2 day mode (Fig. 8) you can enter
one set of programmes for weekdays and
another set for weekends (see page 13).
Note: Either weekdays or weekend days
are shown in the display.
Fig. 5 Fig. 6
Fig. 7 Fig. 8