Wagner & Co RATIOfresh 250 Technical Information Installation Instructions page 16

Table 8 Value Level – SETTINGS: CIRCULATION
Designation Description
The time slots 1 to 4 are depicted in the menu only if the circulation mode "time" has been selected.
TIMESLOT
Sub-menu for setting the circulation times on weekdays (Monday
WEEKDAY
to Friday)
slots 1-4
TIMESLOT
Sub-menu for setting the circulation stimes on weekends (Saturday
WEEKEND
and Sunday)
slots 1-4
First switching on point for the circulation pump in "time" mode. Press
TIMESLOT 1 (2,3,4)
the ■ key to release the time for changes. Use < and > to set the hours
Start:
first and then use ■ to switch to the minute input and change the
[00:00] Time
minutes with < and > and then use ■ to return to the time window level.
TIMESLOT 1 (2,3,4)
First switching off point for the circulation pump in "time" mode. Follow
Stop:
the procedure already described.
[00:00] Time
TARGET GAP
The nominal difference indicates the temperature difference in K, which
is to be maintained between hot water outlet and circulation return.
Nominal: [10] K
MAX.
This adjustable value indicates the circulation return temperature in °C.
TEMPERATURE
If this value is exceeded, the circulation pump switches off.
Nominal: [40] °C
Select this menu item with the < and > keys and press the ■ key to return to the menu level.
END
Table 9 Value Level – DISINFECTION SETTINGS
Designation Description
The disinfection can be displayed and activated only when the cylinder temperature sensor is connected. Based on the current measured
value, the demand for aux. heating is carried out via the external potential-free output.
Risk of scalding during the disinfection cycle!
Select operating mode for the disinfection of the hot water system.
When in automatic mode (AUTO), the hot water and circulation network
MODE
are thermally disinfected at the selected time. Select a time outside of
the typical tapping times to reduce the risk of scalding!
Nominal: [OFF]
With the operating mode ON, the disinfection is activated continuously
(e.g. for testing the function), with OFF is it completely deactivated.
STARTING TIME
Enter the time when disinfection is to start.
[23:00]
STARTING DAY
Setting the week program. Disinfection can also be started on a
predefined day (Mon-Sun) or every day.
[Monday]
The system regulates the circulation pump so that the set system
SYSTEM TEMP
temperature is reached in the circulation return. The hot water temp. is
then adjusted to a temperature that is 50 % higher than the hysteresis of
Nominal: [65] °C
the aux. heating.
Disinfection duration in minutes. This is the duration for which the
DURATION
system temperature is maintained in the circulation return. The LED
diode (9-4) lights up red if the system duration falls below this value
[020] min
during this time.
Aux. heating hysteresis. The external (potential-free) switching output of
the controller is closed as soon as the temperature in the aux. heating
section of the buffer drops below the sum of disinfection temp. and
hysteresis.
TEMP. RISE
The boiler serving for the aux. heating must be connected in a way that
[10] K
it starts the boiler charge function when the potential-free contact is
closed. Since the max. temperature of the boiler is not monitored, the
boiler temperature limitation must be set in a way as to prevent excess
temperatures in the system.
Select this menu item with the < and > keys and press the ■ key to return to the menu level.
END
16
Range Base value
00:00-
00:00
24:00
00:00-
00:00
24:00
5 – 25 K 10 K
5 – 70 °C 40 °C
Range Base value
AUTO
ON OFF
OFF
00:00 –
23:00
24:00
Mon to Sun,
Sun
daily
55 – 80 °C 65 °C
0 – 60 min 20 min
5 – 15 K 10 K
EN-RATIOfresh-250-400_TI-MA-0809-11214900
Your value
Your value