Viessmann Vitodens 200-W Service Instructions Manual page 59

Vitodens 200-W B2HA 80, 100 Service
Solar
(continued)
Coding in the factory setting
20:0
22:8
23:4
24:40
25:50
26:1
27:15
28:3
No extended control functions
enabled.
Start temperature differential
for central heating backup: 8 K.
(code 20:4 must be selected)
Stop temperature differential
for central heating backup: 4 K.
(code 20:4 must be selected)
Start temperature for thermostat
function 104°F (40°C). (code
20:5 or 20:6 must be selected)
Stop temperature for thermostat
function 122°F (50°C). (code
20:5 or 20:6 must be selected)
Priority for DHW tank 1 with
alternate heating.
Only when setting code 20:8.
Alternate heating time 15 minutes.
The DHW tank without priority
is heated at most for the
duration of the set alternate
heating time if the DHW tank
with priority is heated up.
Alternate pause time 3 minutes
After the selected alternate
heating time for the DHW tank
without priority has expired, the
rise in collector temperature is
captured during the alternate
pause time.
Possible change
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
exchanger without additional
temperature sensor.
20:8 Solar heating via external heat
exchanger with additional
temperature sensor.
20:9 Solar heating of two DHW tanks.
22:2 Start temperature differential
to for central heating backup is
22:30 adjustable from 21 to 30 K.
23:2 Stop temperature differential
to for central heating backup is
23:30 adjustable from 1 to 29 K.
24:0 Start temperature for thermostat
to function adjustable from 0 to 100 K.
24:100
25:0 Start temperature for thermostat
to function is adjustable from
25:100 0 to 100 K.
26:0 Priority for DHW tank 1 without
alternate heating.
26:2 Priority for DHW tank 2 without
alternate heating.
26:3 Priority for DHW tank 2 with
alternate heating.
26:4 Alternate heating without priority
for one of the DHW tank.
27:5 The alternate heating time is
to adjustable from 5 to 60 minutes.
27:60
28:1 The alternate pause time is
to adjustable from 1 to 60 minutes.
28:60
Coding 2
59