External Heating Circuit Hook-Up (If Installed) - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Appliance functions
The heating curve is offset along the set room temper-
ature axis. The start and stop points of the heating cir-
cuit pumps depend on the Heating limit, outside tem-
perature for heating circuit... setting.
90
A
C
B
D
Fig. 33 Example 1: Changing the set room tempera-
ture from 20 to 26 °C
Flow temperature in °C
A
B Outside temperature in °C
Set room temperature in °C
C
Heating circuit pump "OFF"
D
Heating circuit pump "ON"
E
Changing the set room temperature
Operating instructions

External heating circuit hook-up (if installed)

Note
Only in conjunction with weather-compensated mode
(cont.)
-20
E
Changing the slope and level
Individually adjustable for each heating circuit
90
3.5
A
+20
Outside temperature in °C
Fig. 34
Changing the slope.
A
Changing the level (vertical parallel offset of the
B
heating curve).
Function:
■
– If the external demand is active, the heating circuit
is supplied with heat.
– If the external demand is inactive (contact open),
heat supply to the heating circuit ends (regardless
of the current set room temperature or the switch-
ing time).
!
Please note
There is no frost protection for the connec-
ted heating circuits.
■ Connection:
If only one heating circuit is hooked up, use con-
–
nection at plug 96: See page 68.
Function description
1.4
B
0.2
-20
67