51
Heating mode
In weather-compensated mode, the boiler water tem-
perature is regulated subject to the outside tempera-
ture.
Heating curve for weather-compensated control
20
30
40
50
60
70
80
90
Boiler
water
temperature in °C
20
15
10
5
0
-5
-10
-15
5
wP
qT
qP
eT
wT
eP
Outside temperature in °C
Fig. 47
X
Code for selected heating curve
The setting can be made in increments of - - to 35.
Set heating curve
1.
Tap / .
The set parameter flashes and will be dis-
played.
2.
Use / to select the parameter.
3. OK
to confirm.
Frost protection function
The frost protection function requires an outside tem-
perature sensor to be connected. Frost protection
function is active at outside temperatures of < 5 °C.
The burner starts and the boiler water temperature is
held at 20 °C.
DHW heating
Heating the DHW loading cylinder from cold
The heating circuit pump is switched ON and the 3-
way diverter valve will be changed over, if the cylinder
temperature sensor captures a temperature lower than
the defaulted set value.
■
The cylinder loading pump is switched ON if the
boiler water temperature
≥
set cylinder temperature.
■
The burner is switched ON if the boiler water temper-
ature
≤
set cylinder temperature, and the cylinder
loading pump is switched ON when the required
boiler water temperature is reached.
The loading cylinder is heated up to the set cylinder
temperature. Heating stops when the specified temper-
ature has been reached at the cylinder temperature
sensor.
Reheating when DHW is drawn off
When DHW is drawn off, cold water enters the lower
section of the loading cylinder.
The heating circuit pump is switched ON and the 3-
way diverter valve is changed over, if the cylinder tem-
perature sensor captures a temperature lower than the
defaulted set value.
Control unit
Functions and operating conditions in weather-compensated mode
5697789
Appendix
Содержание Vitodens 111-W
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