Installation and Operating Instructions
SDC 204 1316BED035-10B-E Date 12/06
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YMBOLS AND ABBREVIATIONS
Explanation of symbols used in operating instructions:
Warning!
This symbol indicates potential dangers and errors
Warning: 230 Volts
This symbol indicates risk to life through high voltages.
•
List
i
Information on operation/special features
Instructions/procedure
?
Test/check
Keypad for control unit
Frequently used abbreviations
Abbreviat
ion
Meaning Abbrevia
tion
Meaning
TColl Temperature of collector [°C]
Min Minimum value
TCyl
Temperature of storage cylinder
[°C]
Max. Maximum value
TTh Temperature for thermostat [°C] K Kelvin unit, corresponds to 1 degree
temperature difference
TCret Temperature of collector – return
line
°C Degree Celsius unit
TFrost Temperature - frost protection Td Temperature differential controller
kWh Energy yield in kWh % Percent
xxx Miscellaneous display value
Term explanations
Unit
A unit is a component of a system and is responsible for part of its
function.
Hysteresis
In control technology, the term hysteresis is used where an upper and
lower threshold value is responsible for switching (see Td Start and Td
Stop).
Shield
Electrical shields reduce the influence of electrical and magnetic fields on
the signals in the cables and wires. Coaxial cables are commonly used
for this purpose.
Heat station
Place at which energy is stored or transferred. In solar thermal systems,
the storage cylinder is the heat station.
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