Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 114

Code 2
"Solar" Group
Coding in the factory set condition
25:50 Stop temperature for thermostat function
122°F (50°C).
Start temperature for thermostat function
≤ stop temperature for thermostat function:
Thermostat function e.g. for reheating.
Switching output sS is switched off when
the temperature at sensor / exceeds
the start temperature for the thermostat
function.
Start temperature for thermostat function
> stop temperature for thermostat function:
Thermostat function e.g. for utilizing excess
heat.
Switching output sS is switched off when
the temperature at sensor / falls below
the start temperature for the thermostat
function.
26:1 Priority for DHW tank 1 – with alternate
heating.
Only when setting code "20:8"
27:15 Alternate heating time 15 min.
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.
28:3 Alternate pause time 3 min.
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.
114
(continued)
Vitotronic 300, GW2B Installation and Service
Possible change
25:0 Stop temperature for thermostat function
to is adjustable from 0 to 100 K.
25:100
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 tanks.
27:5 The alternate heating time is adjustable from
to 5 to 60 min.
27:60
28:1 The alternate pause time is adjustable from
to 1 to 60 min.
28:60