Danfoss 103 Electro Mechanical 24 Hour Time Switch User Guide
- June 13, 2024
- Danfoss
Table of Contents
ENGINEERING
TOMORROW
103 Electro Mechanical 24 Hour Time Switch
103
Electro-mechanical 24 hour timeswitch for controlling hot water and heating
(Including Factory Replacement Units FRU)
Danfoss Heating
Installation and User Guide
For a large print version of these instructions please call Marketing on 01234 364 621.
This product complies with the following EC Directives: Electro-Magnetic
Compatibility Directive.
(EMC) (2004/108/EC)
Low Voltage Directive.
(LVD) (2006/95/EC)
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.
Installation Instructions
Please Note:
This product should only be installed by a qualified electrician or competent
heating installer, and should be in accordance with the current edition of the
IEEE wiring regulations.
Product specification
Specification
| Power supply | 230 Vac ± 15%, 50 Hz |
|---|---|
| Switching action | 1 x SPST, Type 1B |
| Max. Switch Rating | 264Vac, 50/60Hz, 6(2)A |
| Timing Accuracy | ±1 min./month |
| Enclosure Rating | IP20 |
| Max. Ambient Temperature | 55°C |
| Dimensions, mm (W, H, D) | 112 x 135 x 69 |
| Design standard | EN 60730-2-7 |
| Control Pollution Situation | Degree 2 |
| Rated Impulse Voltage | 2.5kV |
| Ball Pressure Test | 75°C |
Installation
NB. For FRU units – go straight to to point 4 on page 5
-
Loosen the fi xing screw in the base of the unit to release the grey plastic Wiring Cover. Ensure the protective tape over the thumbwheel remains in place.
-
Holding the unit clockface downwards, press fi rmly in the centre of the wallplate and slide it from the module as shown.
-
Fix the Wallplate/Terminal Block to the wall with countersunk No.8 woodscrews or to a steel box to BS 4662. 1970 or a surface mounting steel or moulded box having centres of 23/8” (60.3mm).
-
Referring to the Wiring Diagrams on page 6, connect the unit as shown. Ensure that terminals 3 and 6 are linked where required (Mains Voltage applications) with insulated cable capable of carrying full load current.
-
Ensure all dust and debris has been cleared away from the area, then plug the module fi rmly into the wallplate ensuring that the hook at the top of the wallplate engages with the slot at the back of the body. Press the module down until it locates solidly.
-
Cut a cable aperture in the Wiring Cover if necessary; replace the Wiring Cover, and tighten the fi xing screw.
-
Switch on Mains & test for correct operation as follows:
i) Remove protective tape from pre-selector wheel.
ii) Remove dial cover & rotate the clock dial two complete revolutions to clear the mechanism.
ii) Check that all positions of the Selector Switch and Tappets operate correctly. (See instructions in User Booklet.) -
Replace the dial cover. Finally leave this booklet, containing the USER instructions with the Householder.
-
If the unit is to be left turned off and is in a dusty atmosphere, protect the pre-selector wheel by re-affi xing the protective tape.
IMPORTANT: Remove tape prior to putting unit into service.
Wiring
TYPICAL EXTERNAL CIRCUITS
-
Control of Heating Function only (Mains Voltage)
Note: If room thermostat is not required, join timeswitch terminals 1 and 2 with a link suitable for full load current). -
Control of Low Voltage Systems (e.g. warm air gas valves, low voltage burners
-
Typical gas or oil fired heating system with gravity hot water primary and pumped heating
-
Typical control of heating when used with combination type boilers
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 ‘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.
User Instructions
Your timeswitch
Your 103 timeswitch has one time output which can be used to control your
heating and hot water at the same times.
Normally the 103 provides 2 ON periods and 2 OFF periods each day. However 1
ON and 1 OFF period can be obtained by using the Pre-Selector Wheel (see page
12).
You can choose whether the 103 controls your hot water & heating at the
programmed times, constantly ON or constantly OFF. 
Setting the time of day
The dial on the front of the 103 displays the hours of the day using the
24hour clock.
- Remove dial cover (turn slightly to the left and pull off )
- Turn the dial clockwise until the correct time is aligned to the TIME mark (as shown).
IMPORTANT: turn the dial clockwise only
! Remember you will have to re-set the time after a power-cut, and also
when the clocks change in Spring and Autumn.
Setting the time & the programme
Setting the programme (Tappets A, B, C, D)
-
If not already done so, remove the dial cover (turn slightly to the left & pull off )
-
Decide when you want your hot water and heating to come on and go off . While gripping the dial knob slide the RED tappets to the required ON times and the BLUE tappets to the required OFF times (the tappets may be quite stiff to move)
Example:
If you want your system ON between 8am and 10am and again between 4pm and 11pm, set the tappets as shown. (A to 8, B to 10, C to 16, D to 23).
Setting the programme
Remember:
Red tappets (A and C) switch ON
Blue tappets (B and D) switch OFF -
Ensure that the installer has removed the protective tape covering the pre-selector wheel.
-
Using the dial knob, rotate the dial completely at least twice, clockwise only, to clear the mechanism.
Note: Tappets can be moved around the dial in a clockwise or anticlockwise direction, as convenient.
Selecting operating mode
The Rocker Switch on the side of the unit is used to select how your 103
controls your hot water & heating system. You can manually select either:
- hot water & heating follow set programmed
- hot water & heating constantly ON
- hot water & heating constantly OFF
Switch positions
Selecting operating mode
The 103 unit is now set, and the current status of the timeswitch can be
seen on the wheel at the top righthand corner of the unit, (e.g. “OFF UNTIL
C”).
Overriding the programe using the PreSelector wheel
The pre-selector wheel can be used to override the set programme on
occasions when you need to change from your normal heating routine.
By turning the wheel anti-clockwise you can turn the unit ON when it is OFF
and vice versa.
Example:
- Your programme is set so that your heating comes on at 4pm but you arrive home earlier than usual, at 2pm and need the heating ON immediately.
- Turn the wheel anti-clockwise until it displays ON UNTIL `D’ as shown.
- Thus the system is turned ON manually at 2pm but will revert to the set programme at the next operation (i.e. OFF at 11pm)
Some other useful pre-selections are:
ALL DAY ON (1 ON/1 OFF)
Turn the Wheel to display “ON UNTIL D”.
ALL DAY OFF
Turn the Wheel to display “OFF UNTIL A”.
!Note: Do not operate the pre-selector whilst a tappet is close to the
TIME mark. This may cause the time of day setting of the clock to be altered,
and the time would then need to be reset as shown on page 9.
Still having problems?
Call your local heating engineer:
Name: ………………………….
Tel: ………………………….
For problems relating to your heating controls …
Visit our website:
www.heating.danfoss.co.uk
Email our technical department:
ukheating.technical@danfoss.com
Call our technical department
01234 320 256
(9:00-5:00 Mon-Thurs, 9:00-4:30 Fri)
For a large print version of these instructions please contact the Marketing Services Department on 01234 364 621.
Danfoss Ltd
Ampthill Road
Bedford
MK42 9ER
Tel: 01234 364621
Fax: 01234 219705
Part No 7479v04
References
- Danfoss - Engineering Tomorrow in United Kingdom and Ireland | Danfoss
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