Viessmann VITOTRONIC 200 Service Instructions Manual page 41

DHW heating
(cont.)
The DHW circulation pump remains off during DHW
heating in order to prevent the DHW inside the DHW
cylinder being mixed.
1 cylinder temperature sensor, installation in top of DHW cylinder
Cylinder temperature sen-
■
sor, top
Set cylinder temperature
ON Starts DHW heating.
OFF Stops DHW heating.
2 cylinder temperature sensors, installation in top and bottom of DHW cylinder
Cylinder temperature sen-
■
sor, top
Cylinder temperature sen-
■
sor, bottom
Set cylinder temperature
ON Starts DHW heating.
OFF Stops DHW heating.
Note
The bottom cylinder temperature sensor must be ena-
bled with "Temperature sensor at bottom of DHW
cylinder 600E".
Operating status
"Vitotronic 200" operating instructions
Blocking time for DHW heating
A blocking time for DHW heating can be specified with
"Blocking time DHW heating 6060". Once the DHW
cylinder has been fully heated, DHW heating will not
be switched on during the specified blocking time,
even if the cylinder temperature undershoots the set
temperature by "Hysteresis DHW temperature heat
pump 6007" during this blocking time.
Note
If too long a blocking time is set and DHW consump-
tion is high, the cylinder temperature may fall too far.
Operating status in DHW time program
"Top" "Standard"
ON ON
OFF OFF
"Set DHW temperature 6000"
Operating status in DHW time program
"Top" "Standard"
ON ON
OFF
OFF
—
"Set DHW temperature 6000"
Switching DHW heating on and off
If the temperature at the start temperature sensor falls
below the current set DHW temperature by more than
"Hysteresis DHW temperature heat pump 6007",
DHW heating starts. DHW heating ends if the tempera-
ture at the stop temperature sensor rises above the set
DHW temperature or as soon as "Max. DHW temper-
ature 6006" is reached.
"Temp. 2"
ON
OFF
"Set DHW temperature 2 600C"
"Temp. 2"
ON
OFF
"Set DHW tem-
perature 2 600C"
Max. pause duration for DHW heating
"Max. interruption DHW heating 6061" determines
the longest pause duration before the next period of
DHW heating. When the DHW cylinder has been fully
heated, DHW heating will start again in any case once
this pause duration has expired. This applies even if
the cylinder temperature has not undershot the set
temperature by the "Hysteresis DHW temperature
heat pump 6007".
Note
If "Max. interruption DHW heating 6061" is set to a
shorter period than "Blocking time DHW heating
6060":
The set blocking time will have no effect. Provided that
the stop temperature for the DHW cylinder is under-
shot, DHW heating will start once the "Max. interrup-
tion DHW heating 6061" has expired. This applies
even if the start temperature for DHW heating has not
been undershot.
Function description
One-off DHW heat-
ing
ON
OFF
One-off DHW heat-
ing
ON
OFF
"Set DHW tempera-
ture 6000"
41