15
When a starting time for thermal disinfection with starting
delay is adjusted in
SDIS, the thermal disinfection will be
delayed until that time, even after the
CDIS has counted down
to 00:00. If
CDIS ends, for example, at 12:00 o‘clock, and SDIS
has been set to 18:30, relay 2 will be operated with a delay of
6.5 hours at 18:30 instead of 12:00.
During the waiting time,
SDIS is displayed with the adjusted
starting time (flashing).
If, during the waiting time, the temperature at S3 exceeds
TDIS
for the adjusted heating period
DDIS, thermal disinfection is
considered complete and a new monitoring period begins.
If the starting time is adjusted to 00:00 (factory setting), the
delay function is inactive.
Upon delivery,
OTD is deactivated. The adjustment values PDIS,
TDIS, DDIS and SDIS are displayed after the option has been
activated. After the thermal disinfection function has been
completed, the values will be “hidden” and the monitoring
period will be displayed.
SDIS
Starting time
Adjustment range:
00:00 ... 24:00 (o‘clock)
Factory setting: 00:00
Thermal disinfection with starting delay
Option: Thermal disinfection of the upper DHW zone (OTD)
TDIS
Disinfection temperature
Adjustment range:
30 ... 200 °F
[0 ... 95 °C]
in steps of 2 °F [2 °C]
Factory setting:
140 °F [60 °C]
DDIS
Heating period
Adjustment range:
00:00 ... 23:59 (hh:mm)
Factory setting: 01:00
For thermal disinfection, the temperature in the upper DHW
tank zone has to be monitored. This protection is ensured
when, during the monitoring period (
PDIS), the disinfection
temperature (
TDIS) is continuously exceeded for the entire
heating period (
DDIS). S3 is used as the reference sensor and
displayed as
TSTT.
PDIS:
Monitoring period
Adjustment range:
0 ... 30:0 ... 24 h (dd:hh)
Factory setting: 01:00
This function is used for protecting the upper tank zone against
Legionella by activating the backup heating.
Reference sensor for the thermal disinfection is S3!
Î
To activate the function, select “On” in the
OTD channel.
OTD:
Thermal disinfection function
Adjustment range: ON / OFF
Factory setting: OFF
Due to the flexible control logic, the exact time of thermal
disinfection is not predictable. In order to set a fixed time
for the disinfection to be run, the starting delay
SDIS must
be employed:
If
OTD is activated, PDIS will start as soon as the temperature
at S3 falls below
TDIS. The display channel CDIS appears,
counting backwards the remaining time of
PDIS. If, during
the monitoring period, the temperature at S3 exceeds
TDIS
continuously for the duration of
DDIS, thermal disinfection is
considered complete and a new monitoring period begins.
If
CDIS counts down to 00:00, relay 2 will be operated in order
to use the backup heating for thermal disinfection.
CDIS will
then be replaced with a display channel
DDIS showing the
adjusted heating period.
DDIS will start counting down the
heating period as soon as
TDIS is exceeded at S3. As long as
DDIS is active, the temperature at S3 will be displayed as TDIS
instead of
TSTT.
If, during
DDIS, the temperature at S3 exceeds TDIS by more
than 10 °Ra [5 K], relay 2 is switched off until the temperature
falls below
TDIS + 4 °Ra [2 K].
If, during
DDIS, the temperature at S3 falls below TDIS, the
heating period will restart.
DDIS can only be completed when
TDIS is exceeded without interruption.
Summary of Contents for SOM 7 PLUS
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