
Programming an electro-mechanical timer simply involves rotating a dial to set the time of day, positioning pointers
or tappets at desired switching points and then making selections as above. These units usually provide two On/
Offs during a 24-hour period, repeated every day. Switching events can rarely be set closer than 10-15 minutes.
Setting the time (and day) on modern electronic programmers is a simple push button job; and they have ‘ready-
to-go’ built-in switching programmes that are easily modified by the user. To change the programme, simply put
the control in its programming mode (e.g. press a button called PROG) and follow the logical programming sequence
explained in the unit’s accompanying instructions. After the required changes have been made, press the RUN
button to return to normal control mode. Selecting the options is simply done by pressing buttons also.
Electronic controls offer greater accuracy, better timing resolution (typically 1 min.), solid-state reliability, more
energy saving features and noiseless operation. They also allow 7-day or weekday/weekend programming plus
totally independent timing of heating and DHW.
Installers must choose appropriate programmers for each user. Electronic time controls provide the best energy
saving options and are recommended wherever possible.
WIDE CHOICE
Danfoss Randall’s wide choice of time controls, even without programmable room thermostats, enables installers
to provide customers with the most suitable devices for their needs. The following table will assist locate suitable
model references for which further details can be obtained from the freely available Product Selection Guide.
Category DR Model Ref. Type 24 hr. 5/2 day 7 day
Time Switches 103 Electro-mechanical z
103E5 Electronic zz
103E7 Electronic zz
SET1E Electronic z
TS975 Electronic zz
TS715 Electronic zzz
Mini-Programmers 3020P Electro-mechanical z
SET2E Electronic z
102 Electro-mechanical z
102E5 Electronic zz
102E7 Electronic zz
Std. Programmers 3060 Electro-mechanical z
4033 Electro-mechanical z
SET3M Electro-mechanical z
SET3E Electronic z
CP715 Electronic zzz
Full Programmers FP715 Electronic zzz
FP975 Electronic zz
ADDITIONAL HELP
Should any additional help be needed in the selection or application of time controls, please do not hesitate to
contact Danfoss Randall –full contact details are shown below. Most product Data Sheets and instructions are
available as downloads from the company’s web site.
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