17 17
Thermal disinfection
This function helps to contain the spread of Legionella in DHW stores by system-
atically activating the afterheating.
R2 is the reference relay, S3 is the reference sensor.
For thermal disinfection, the temperature at the reference sensor has to be moni-
tored. This protection is ensured when, during the monitoring period, the disinfec-
tion temperature is continuously exceeded for the entire disinfection period.
The monitoring period starts as soon as the temperature at the reference sensor
falls below the disinfection temperature. When the monitoring period ends, R2 and
R4 activate the circulating pump and the afterheating. The disinfection period starts,
if the temperature at the reference sensor exceeds the disinfection temperature.
Thermal disinfection can only be completed when the disinfection temperature
is exceeded for the duration of the disinfection period without any interruption.
Starting time delay
If the starting delay option is activated, a starting time for the thermal disinfection
with starting delay can be adjusted. The activation of the afterheating is then delayed
until that starting time after the monitoring period has ended.
If the monitoring period ends, for example, at 12:00 o’clock, and the starting time
has been set to 18:00, the reference relay will be energised with a delay of 6 hours
at 18:00 instead of 12:00 o’clock.
Note
If the thermal disinfection option is activated, the display channels TDIS,
CDIS, SDIS and DDIS will be displayed.
OTDIS 17
PUSH
PDIS / Monitoring operiod
Adjustment range: 0 … 30:0 … 24 h (dd:hh)
Factory setting: 01:00
OTDIS
Thermal disinfection option
Adjustment range: OFF / ON
Factory setting: OFF
SDIS / Starting time delay
Adjustment range: 00:00 … 23:00
Factory setting: 18:00
(full hours only)
DDIS / Disinfection period
Adjustment range: 00:00 … 23:59
Factory setting: 01:00
TDIS / Disinfection temperature
Adjustment range: 0 … 95 °C
in steps of 1 °C
Factory setting: 60 °C
OSDIS / Starting delay option
Selection: ON / OFF
Factory setting: OFF
19
OFF
OFF
ON
ON
BACK
PUSH
OPARR 18
PUSH
OPARR
Parallel relay option
Selection: OFF / ON
Factory setting: OFF
INVER / Inversion
Selection: OFF / ON
Factory setting: OFF
18
BACK
PUSH
18
Parallel relay
With this function, e. g. a valve can be controlled in parallel to the pump via a sep-
arate relay.
If solar loading takes place or if a solar function is active, the relay selected will be
energised. The parallel relay can also be energised inversely.
Note
If R1 is in the manual mode, the selected parallel relay will not be energised.
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