Danfoss SET 3E User manual

SET 3E
Electronic 24-Hour Programmer
for Heating and Hot Water
User Guide
Danfoss Heating
MAKING MODERN LIVING POSSIBLE

SET3E
2
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Danfoss Heating 3
GB
G
G
G
G
B
B
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B
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Thank you for buying a Danfoss product

SET3E
4
GB
User Instructions
SET3E
Electronic 24-Hour Programmer
for Heating and Hot Water
Index
1.0 User Guide ....................................................................................................6
1.1 Your Programmer...............................................................................6
1.2 Resetting the Unit..............................................................................6
1.3 Setting the Clock................................................................................7
1.4 Preset Programme.............................................................................7
1.5 Accepting the Preset Programmes..............................................7
1.6 Programming the Unit.....................................................................7
2.0 Temporary User Overrides....................................................................8
2.1 Manual Switch Settings...................................................................9
2.2 Memory Backup .............................................................................. 10

Danfoss Heating 5
GB
What is a programmer?
... an explanation for householders.
Programmers allow you to set ‘On’ and ‘Off’ time periods. Some
models switch the central heating and domestic hot water on
and off at the same time, while others allow the domestic hot
water and heating to come on and go off at different times.
Set the ‘On’ and ‘Off’ 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 ‘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 Time and British Summer Time.
You may be able to temporarily adjust the heating programme,
for example, ‘Override’, ‘Advance’or‘Boost’. These are explained in
the manufacturer’s instructions.
The heating will not work if the room thermostat has switched
the heating off. And, if you have a hot-water cylinder, the water
heating will not work if the cylinder thermostat detects that the
hot water has reached the correct temperature.
The text below has been edited and approved
by the Plain English Campaign, who has issued a
Crystal Mark to be displayed with it.

SET3E
6
GB
1.0 User Instructions
1.1 Your Programmer
The SET3E allows you to switch your hot water and heating on and off
automatically, at times that suit you.
The programmer provides 2 ON times and 2 OFF times per day, and
by the use of a simple rocker switch you can run your heating and hot
water separately, to suit your lifestyle.
1.2 Resetting the Unit
IMPORTANT: Before you start you should reset the unit. This will
reinstate the preset programmes.
To do this:
• move slide switch to SET TIME
position.
• using something non-metallic
(i.e a matchstick) press into the
small hole as shown opposite.
Slider switch Rocker switches
and +1
HOUR button
and
ADVANCE button
RESET

Danfoss Heating 7
GB
1.3 Setting the Clock
• Move the slider to SET TIME
position.
• Use and keys to set the
correct time.
1.4 Preset programme
The unit is supplied with the following preset programme which will
be active after the unit has been RESET (see page 6):
ON at 6:30am, OFF at 8:30am.
ON at 5:00pm, OFF at 10:30pm.
To alter these times to suit your requirements, follow the instructions
below.
1.5 Accepting the preset programmes
If you are happy to use the preset
programmes above you don’t need
to do anything else.
Just return the slider to the
RUN position.
1.6 Programming the Unit
You can programme your heating and hot water to come on and go
off twice a day, to suit your requirements. To programme your unit:
• Move the slider to the 1st ON
position and use and keys
to set the time you want the
programmer to first come on.
• Move the slider to the 1st OFF
position and use and keys
to set the time you want the
programmer to first go off.

SET3E
8
GB
• Move the slider to the 2nd ON
position and use and keys
to set the time you want the
programmer to next come on.
• Move the slider to the 2nd
OFF position and use and 
keys to set the time you want the
programmer to next go off.
Remember to return the slider switch to the RUN position after
programming.
2.0 Temporary User Overrides
Sometimes you may need to change the way you use your system
temporarily, i.e. due to unusually cold weather, increased hot water
requirements. The SET3E has two convenient overrides which can be
selected without affecting the set programme.
Note: This will only work when the slider switch is in the RUN position and
will automatically cancel at the start of the next programmed event.
Advance
• Press the ADVANCE button once
to move forward to the next
programmed event.
• If the system is on it will go off.
If it is off it will come on.
• A bar on the left of the LCD
will remind you that you have
selected Advance.
• To cancel the override, press the
ADVANCE button again.

Danfoss Heating 9
GB
1 Hour Extra
• Press +1 HOUR button once
if you need an extra hour of
operation.
• If the system is off it will come
on. If it is already on it will add
an extra hour so the system
stays on for an extra hour.
• A bar on the right of the LCD
will remind you that you have
selected +1 hour.
• To cancel the override, press the
+1 HOUR button again.
2.1 Manual Switch Settings
The 2 rocker switches are used to select
how the SET3E controls your hot water
and heating. The hot water and heating
systems can be controlled independently
but share the same time settings
WATER switch
• OFF - the hot water is manually switched OFF and will stay off
until you change the position of the switch.
• TIMED - the hot water will come on and go off at the times you
have programmed, plus any temporary overrides.
• CONSTANT - the hot water will come on manually and stay on
constantly until you change the position of the switch.
HEATING switch
• OFF - the heating is manually switched OFF and will stay off until
you change the position of the switch.
• TIMED - the heating will come on and go off at the times you
have programmed, plus any temporary overrides.
• CONSTANT - the heating will come on manually and stay on
constantly until you change the position of the switch.

SET3E
10
GB
2.2 Memory Backup
IMPORTANT
If the SET3E is ever disconnected from the mains the display will go
blank but the unit will keep your programme time and settings for
up to 10 hours.
When power is restored the unit will continue to function as normal.
For power cuts or disconnections of greater than 10 hours, when
mains power is restored you must reset the unit (see page 6). This
will reinstate the factory preset programmes and set the time of day
to noon.