Viessmann VITOTRONIC 200 Installation And Service Instructions Manual page 49

"Solar" group
(cont.)
Coding in the delivered condition
10:0 Target temperature control switch-
ed off (see coding address "11")
11:50 Set solar DHW temperature 50 °C
Target temperature control
■
switched on (code "10:1"):
Temperature at which the solar
heated water is to be stratified
into the DHW cylinder.
Code "20:9" (heating of 2 DHW
■
cylinders) is set:
When the set DHW temperature
is achieved in one DHW cylinder,
the 2nd DHW cylinder is heated.
12:20 Minimum collector temperature
(minimum start temperature for the
solar circuit pump) 20 °C
20:0 No extended control function ena-
bled.
22:8 Start temperature differential with
central heating backup (code
"20:4" must be set) 8 K
23:4 Stop temperature differential with
central heating backup (code
"20:4" must be set) 4 K
24:40 Start temperature for thermostat
function (code "20:5" or "20:6"
must be set) 40 °C
25:50 Stop temperature for thermostat
function (code "20:5" or "20:6"
must be set) 50 °C
26:1 Priority for DHW cylinder 1 with
cyclical heating
(code "20:9" must be set)
Possible change
10:1 Target temperature control switched
on
11:10 The set solar DHW temperature is
to adjustable from 10 to 90 °C.
11:90
12:0 No minimum limit enabled
12:1 Minimum collector temperature ad-
to justable from 1 to 90 °C.
12:90
20:1 Additional function for DHW heating
20:2 Differential temperature control 2
20:3 Differential temperature control 2
and auxiliary function
20:4 Differential temperature control 2 for
central heating backup
20:5 Thermostat function
20:6 Thermostat function and auxiliary
function
20:7 Solar heating via external heat ex-
changer without additional tempera-
ture sensor
20:8 Solar heating via external heat ex-
changer with additional temperature
sensor
20:9 Solar heating of 2 DHW cylinders
22:2 Start temperature differential adjust-
to able from 2 to 30 K
22:30
23:2 Stop temperature differential adjust-
to able from 1 to 29 K
23:30
24:0 Start temperature for thermostat
to function adjustable from 0 to 100 K
24:100
25:0 Stop temperature for thermostat
to function adjustable from 0 to 100 K
25:100
26:0 Priority for DHW cylinder 1 without
cyclical heating
26:2 Priority for DHW cylinder 2 without
cyclical heating
26:3 Priority for DHW cylinder 2 with cy-
clical heating
26:4 Cyclical heating without priority for
one of the DHW cylinders
Coding level 2
49