Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 75

Solar
(cont.)
11 Set DHW temperature, solar
Display
50 °C
... °C
12 Minimum collector temperature
Display
None
10 °C
... °C
20 Extended control function
Display
None
Additional function, increased DHW hy-
giene
Differential temperature control 2
Differential temperature control 2 and auxil-
iary function for increased DHW hygiene
Differential temperature control 2 for central
heating backup
Thermostat function
Thermostat function and auxiliary function
for increased DHW hygiene
Solar heating via external heat exchanger
without additional temperature sensor
Solar heating via external heat exchanger
with additional temperature sensor
Solar heating of 2 DHW cylinders
22 Start temperature differential for central heating backup
Display
8 K
... K
Value Explanations
11:50 Target temperature control switched on (parameter
■
"10:1"):
Temperature at which the solar heated water is to be
stratified into the DHW cylinder.
If parameter "20:9" (heating of 2 DHW cylinders) is
■
set:
When the set cylinder temperature is achieved in
one DHW cylinder, the 2nd DHW cylinder is heated.
11:10 to Set solar cylinder temperature adjustable from 10 to
11:90 90 °C.
Value Explanations
12:0 Minimum temperature limit disabled
12:10 Minimum start temperature for solar circuit pump
10 °C
12:1 to Minimum start temperature adjustable from 1 to 90 °C
12:90
Value Explanations
20:0 No extended control function enabled
20:1
20:2 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
20:3 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
20:4 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
20:5 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
20:6 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
20:7
20:8 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
20:9 Do not adjust in conjunction with Vitocell 100-W, type
CVUC-A
Value Explanations
22:8 Parameter "20:4" must be set.
22:2 to Start temperature differential adjustable from 2 to 30 K
22:30
Parameter
75