Viessmann VITOTRONIC 200 Service Instructions Manual page 22

Function description
DHW heating
Starting and stopping DHW heating
Operating status
One cylinder temperature sensor:
■ Cylinder temperature sen-
sor, top
■ Return temperature sensor
secondary circuit
Two cylinder temperature sensors:
■ Cylinder temperature sen-
sor, top
■ Cylinder temperature sen-
sor, bottom
■ Return temperature sensor
secondary circuit
"Operating status", see operat-
ing instructions "Vitotronic 200".
Frost protection
If the temperature at the cylinder tem-
perature sensor drops below 3 °C, the
heat pump control unit also immediately
starts the instantaneous heating water
heater, the external heat source or the
EHE immersion heater.
Note
Any block of the immersion heaters for
DHW heating becomes ineffective
("Enable electric heaters for DHW
heating 6015" set to "0").
22
(cont.)
"Top"
ON and OFF
—
ON and OFF
—
—
"Standard"
ON
OFF
ON
OFF
—
Frost protection heating ends as soon as
the temperature at the top cylinder tem-
perature sensor rises above 10 °C.
"Temp. 2."
ON
OFF
ON
OFF
—