Viessmann VITODENS 200-W Installation And Service Instructions Manual page 64

Code 2
Solar/group "4"
(cont.)
Coding in the delivered condition
12:10 Minimum collector temperature
(minimum solar circuit pump start
temperature) 10 °C.
20:0 No extended control function ena-
bled
22:8 Start temperature differential with
central heating backup 8 K (code
"20:4" must be set)
23:4 Stop temperature differential with
central heating backup 4 K (code
"20:4" must be set)
24:40 Start temperature for thermostat
function 40 °C (code "20:5" or
"20:6" must be set)
25:50 Stop temperature differential for
thermostat function 50 °C (code
"20:5" or "20:6" must be set)
26:1 Priority for DHW cylinder 1 with
cyclical heating
(code "20:9" must be set)
27:15 Cyclical heating time 15 min.
Once the DHW cylinder with priori-
ty is heated up, the DHW cylinder
without priority is heated for a max-
imum duration equal to the set cy-
clical heating time.
28:3 Cyclical pause time 3 min.
After the set cyclical heating time
for the DHW cylinder without priori-
ty has expired, the rise in collector
temperature is captured during the
cyclical pause time.
64
Possible change
12:0 No minimum limit enabled
12:1 Minimum collector temperature ad-
to justable from 1 to 90 °C
12:90
20:1 Auxiliary 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
any DHW cylinder
27:5 The cyclical heating time is adjusta-
to ble from 5 to 60 min
27:60
28:1 Cyclical pause time adjustable from
to 1 to 60 min
28:60