64
504.3 Max. set cylinder temperature
Max. selectable set cylinder temperature:
Do not set this value lower than the value in parame-
ter 504.1.
Note
874.0 cannot be set higher than this value.
Danger
There is a risk of scalding at DHW temperatures
above 60 °C.
■
Limit the temperature in the DHW flow to
60 °C by means of a mixer assembly, e.g. an
automatic thermostatic mixing valve (DHW cyl-
inder accessory).
■
Switch on scald protection: Via the HMI pro-
gramming unit or parameter 503.0
504.5 Efficient lower border
Lower temperature limit for efficient DHW heating:
Domestic hot water is heated efficiently within the tem-
perature range of the temperature set here and the
temperature set in parameter 504.6.
Note
This value cannot be set lower than the value in
parameter 504.1.
504.6 Efficient upper limit
Upper temperature limit for efficient DHW heating:
Max. adjustable set cylinder temperature.
Note
This value cannot be set higher than the value in
parameter 504.3.
534 Circulation pump run-on after cylinder heating
534.0 Circulation pump run-on after cylinder heating
After DHW heating ends, heat is still available at the
condenser. During the run-on time set here in seconds,
the secondary pump feeds this heat to the heating sys-
tem. This means at the next start, the compressor will
have to start against a lower temperature level.
873 DHW hygiene function
873.0 Activation of increased DHW hygiene
Enabling the hygiene function:
At specified intervals, the hygiene function heats the
cylinder to the temperature set in parameter 874.0. On
each occasion, the cylinder temperature is maintained
at this level for the duration set in parameter 874.1.
Value Meaning
0 Hygiene function locked
1 Hygiene function enabled
DHW parameter group
504 Limits for set DHW temperature (cont.)
6218234
Parameter
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