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en
19
Installation
Commissioning
Adjustments
Tr
oubleshooting
Data comm
unication
Maximum limitation for exceedance of the hot water set temperature (T-HW set)
This function can be used for preventing draw-off
water temperatures that massively exceed the hot
water set temperature ( scald protection).
Note:
The switch-on condition for the maximum
limitation will only become valid if the hot
water fl ow temperature is >= 60°C.
When the temperature measured at the HW fl ow
sensor S2 exceeds the hot water set temperature
T-HW set by the maximum temperature difference
∆
Tmax
, the primary pump R4 is switched off.
Example:
T-HW > T-HW set +
∆
Tmax
Î
primary pump off
When the maximum limitation is active, no DHW
heating takes place. In the Status / Messages menu, the
error message Emergency shutdown appears. In or-
der to enable DHW heating again, acknowledge the
error message by pressing button (5).
Note:
The maximum limitation will not become
active during and up until 1 hour after the
completion of a thermal disinfection.
Note:
The maximum limitation does not affect the
control of the circulation pump.
Adjustment channel
Description
Adjustment range / selection Factory setting
Max. limitation
Maximum limitation option
Yes, No
Yes
tmax
Switch-on condition time period
5 … 300 s
180 s
∆
Tmax
Maximum exceedance of the hot
water set temperature T-HW set
3.0 … 8.0 K
5.0 K
Main menu / Hot water /
∆
Tmax