Operating instructions
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Daikin RoCon
Daikin Control unit
008.1543999_00 – 03/2017 – EN
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Glossary
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Glossary
Operating mode
Request by the user or the control unit for the function of the heat generator (e.g. room heating, hot
water generation, standby, etc.)
Heating characteristic curve Mathematical relationship between the external temperature and the target T-HS (synonym = heat
slope) in order to achieve the desired room temperature at all outside temperatures.
Anti-legionella system
Periodic heating of the storage water to >60 °C for the preventative elimination of pathogenic bacteria
(so-called legionella) in the hot water circuit.
Modulation
Automatic and stepless adjustment of the heating performance/pump performance to the respective
heating requirement, without different heating/pump steps or cycles having to be switched.
Nominal output
Maximum heating performance, which the heat generator provides under test conditions for certain op-
erating temperatures.
Parameter
A value that influences the execution of programs or processes or defines specific states.
Control unit
Device electronics that are used to control the processes for the heat generation and heat distribution
of the heating system. The control unit consists of a number of electronic components. The most im-
portant component for the operator is the control unit in the front area of the heat generator, which in-
cludes program selection keys, rotary switches and display.
Return flow
Part of the hydraulic circuit that directs the cooled water from the heating surfaces in the rooms back
to the heat generator via the piping system.
Switching time program
Program for setting the times on the control unit in order to determine the regular heating, reducing and
hot water cycles.
Flow
Part of the hydraulic circuit that diverts the heated water from the heat generator to the heating sur-
faces.
Domestic hot water circuit
Is the water circuit in which cold water is heated and diverted to the hot water tap.
Domestic hot water gener-
ation
Operating status of the heat generator in which heat with elevated temperatures is generated and fed
to the hot water circuit, e.g. loading of the hot water storage tank.
Heat exchanger
A component that transfers thermal energy from one circuit to another. The two circuits are separated
from each other hydraulically by a wall in the heat exchanger.
Water shortage/Overheating
protection
Safety device which automatically switches off the boiler in the event of a water shortage to prevent
overheating.
Weather-dependent T-HS
control
A suitable T-HS is determined from the measured value for the external temperature and a defined
heat slope; this temperature is used as the target value for temperature control in the heating unit.
Circulation pump
Is an additional electrical circulation pump that permanently circulates the hot water in the hot water
lines, thus providing it immediately at every tap. This circulation is especially useful in extensive
pipeline networks. In systems without a circulation line, first the water cooled in the sampling line es-
capes during the sampling process until the sampling line has been sufficiently heated by the inflowing
hot water.
