Optionally, the controller can indicate an active thermal disinfection at the fault indication out-
put. In this case, the fault alarm function must be deactivated.
Thermal disinfection for preventing legionella infection causes
4
excessively high return flow temperatures during the disinfection cycle (return flow tempera-
ture limitation suspended),
4
excessively high DHW temperatures after thermal disinfection has been concluded
4
lime scale (possibly), which can have a negative effect on heat exchanger performance
Note:
–
This function is not available when a storage tank thermostat is used.
–
The connection of the fault indication output with DHW–CO4–15 = ON differs depending
on the system. Refer to the fold-out page.
Functions
WE
Configuration
Storage tank sensor S7
OFF
DHW–CO4–01 = ON
Thermal disinfection
OFF
00:00 h
04:00 h
70.0 °C
0 min
10.0 °C
DHW–CO4–14 = ON
Start time of thermal disinfection
/ 00:00 to 23:45 h
Stop time of thermal disinfection
/ 00:00 to 23:45 h
Disinfection temperature / 60.0 to 90.0 °C
Disinfection temperature sustaining time / 0 to 255 min
Thermal disinfection boost / 0.0 to 5.0 °C
Indication of an active thermal disinfection at the binary output
Binary output ON during
thermal disinfection
OFF
DHW–CO4–15 = ON
Fault indication output
OFF
HC1–CO5–17 = OFF
EB 5610 EN
79
Functions of the DHW circuit
Summary of Contents for trovis 5600
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