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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.

What is a programmer?

Summary of Contents for SET2E

Page 1: ...SET2E Installation User Instructions electronic 24 hour mini programmer for heating hot water...

Page 2: ...n 4 5 Wiring 5 7 Replacement 7 9 User What is a Programmer 10 Your programmer 11 Resetting the unit 11 Setting the clock 12 Factory pre sets 12 Programming the unit 12 13 Temporary overrides 13 14 Man...

Page 3: ...ply 230 15 Vac 50 60Hz Switch action 2 x SPDT Type 1B Switch rating Max 264Vac 50 60Hz 3 1 A Timing accuracy 1 min month Power reserve minimum 10 hours Enclosure rating IP30 Max ambient temperature 45...

Page 4: ...lplate 3 For mains voltage applications a link must be fitted between terminals L and 2 and between 1 and 5 4 Whilst the unit does not require an Earth connection a terminal is provided on the wallpla...

Page 5: ...ition and the right hand rocker switch to the HW CH position The red LED should now be illuminated Adjust any remote thermostats to check the services operate correctly 9 Press the left hand rocker sw...

Page 6: ...has been made to ensure the accuracy of this information it is recommended that the specific information relating to the ancillary controls is obtained from the manufacturers concerned N L 1 2 3 4 5...

Page 7: ...h the existing unit is connected please contact our Technical Services Department before proceeding with replacement If the unit is to be used in association with a 6 wire Honeywell Y Plan a special w...

Page 8: ...s 1 2 are linked and 5 6 are linked 4 DANFOSS RANDALL 3060 3020P 1 7 6 4 2 3 5 DANFOSS RANDALL 102 102E 5 3 6 1 2 DANFOSS RANDALL 701 N L 3 6 4 1 5 2 HONEYWELL ST6200 N L 3 1 4 2 HORSTMANN CORAL 423 4...

Page 9: ...D CENTROLLER 60 1 2 5 4 3 SMITH IND CENTROLLER 10 N L 3 2 1 4 SMITH IND CENTROLLER 70 1 2 5 4 3 6 SMITH IND CENTROLLER 1000 N L 3 1 4 2 Programme selectors linked SWITCHMASTER 320 350 N 4 L 3 1 Termin...

Page 10: ...anently 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 tempora...

Page 11: ...r constantly OFF During the summer the central heating can be turned off whilst still controlling the hot water at the set times Resetting the Unit IMPORTANT Before you start you should reset the unit...

Page 12: ...unit is supplied with the following preset programme which will be active after the unit has been RESET see page 10 ON at 6 30am OFF at 8 30am ON at 5 00pm OFF at 10 30pm To alter these times to suit...

Page 13: ...on and use W and X keys to set the time you want the programmer to next come on Move the slider to the 2nd OFF position and use W and X keys to set the time you want the programmer to next go off Temp...

Page 14: ...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 sel...

Page 15: ...off and only the hot water is controlled according to the set programme Memory Backup IMPORTANT If the SET2E is ever disconnected from the mains the display will go blank but the unit will keep your...

Page 16: ...Name Tel Visit our website www danfoss randall co uk Email our technical department drl_technical danfoss com Call our technical department 0845 121 7505 8 45 5 15 Mon Thurs 8 45 4 45 Fri For a large...

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