Danfoss 103 User Manual
103
Electro-mechanical 24 hour
timeswitch for controlling hot water and heating
(Including Factory Replacement Units FRU)
Danfoss Heating
Installation and User Guide
Index
Installation
Product speci cation 3
Installation 4-5
Wiring 6
User
What is a timeswitch? 7
Your timeswitch 8
Setting the time of day 9
Setting the programme 9-10
Selecting operating mode 11
Temporary overrides 12
Contact details 16
INDEX
For a large print version of these instructions
please call Marketing on 01234 364 621.
2
®
Certification Mark
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 quali ed
electrician or competent heating installer, and should be
in accordance with the current edition of the IEEE wiring
regulations.
Product speci cation
Speci cation
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
Installation & Speci cation
Control Pollution Situation Degree 2
Rated Impulse Voltage 2.5kV
Ball Pressure Test 75°C
3
Installation
Pre-Selector wheel
Selector switch
Plug-in replacement
module
Wallplate/Terminal
block (not with FRU
units)
NB. For FRU units - go straight to to point 4 on page 5
1. Loosen the xing screw in the
base of the unit to release the
Installation
grey plastic Wiring Cover. Ensure
the protective tape over the
thumbwheel remains in place.
wallplate/
terminal
block
4
2. Holding the unit clockface
downwards, press rmly in the
centre of the wallplate and slide
it from the module as shown.
plug-in
module
3. 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).
4. 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.
5. Ensure all dust and debris has been cleared away from
the area, then plug the module 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.
6. Cut a cable aperture in the Wiring Cover if necessary;
replace the Wiring Cover, and tighten the xing screw.
7. 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.)
Installation
8. Replace the dial cover. Finally leave this booklet, containing
the USER instructions with the Householder.
9. If the unit is to be left turned o and is in a dusty
atmosphere, protect the pre-selector wheel by re-a xing
the protective tape.
IMPORTANT: Remove tape prior to putting unit into
service
.
5
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