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Use
FIG. 7.0
You can lower the set temperature by a number of degrees (preset with RV5), e.g. by night or during your
absence, by connecting a switch or a relay contact (e.g. a timer such like K2603 or K1682) at the place
marked with 'E.S.' (Economy Switch).
The hysteresis is the difference between the temperatures at which the output is switched on resp. switched
off. Depending on the application, a smaller or larger hysteresis may be desired: to regulate the room tem-
perature for instance, a small hysteresis is desirable. On the contrary, this makes no sense with water-
heaters, so, in this case, you should select a larger hysteresis.
You can adjust the hysteresis with RV4.
The adjusting range is about 0,2 to 2°C (0,4 to 4°F) when R24 and R25 are 180K resistors, and 1 to 10°C
(2 to 18°F) when you fitted wire links.
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