Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 98

System configuration (parameters)
Heating circuit 1, Heating circuit 2, Heating...
934.3 "Priority, DHW heating, heating circuit 2"
Setting
OFF
DHW
934.5 "Differential temperature, heating circuit 2"
Setting
8 K
934.6 "Operating mode, heating circuit 2"
Setting
Weather-compensated without room tem-
perature hook-up
Weather-compensated with room tempera-
ture hook-up
934.7 "Room influence factor, heating circuit 2"
Setting
935.3 "Priority, DHW heating, heating circuit 3"
Setting
OFF
DHW
935.5 "Differential temperature, heating circuit 3"
Setting
8 K
98
(cont.)
Explanations
Priority of DHW heating over heating circuit pump and
mixer
0 Without DHW heating priority
1 With DHW heating priority
Explanations
The flow temperature of the heat generator is higher
than the flow temperature of the heating circuit with
mixer by an adjustable differential temperature. See
also chapter "Function description".
8 Differential temperature in delivered condition 8 K
0 to 20 Differential temperature adjustable from 0 to 20 K
Explanations
See also parameter 934.7
Heating mode:
0 Weather-compensated without room temperature in-
fluence
1 Weather-compensated with room temperature influ-
ence
Explanations
The higher the value, the greater the influence of the
room temperature on the set flow temperature of the
heating circuit (heating curve). Operation with room
temperature hook-up must be set for the heating cir-
cuit (parameter 934.6). Change value for heating cir-
cuit with mixer only.
For a sample calculation, see chapter "Heating curve"
in the "Function description"
8 Room influence factor
0 to 64 Room influence adjustable from 0 to 64
Explanations
Priority of DHW heating over heating circuit pump and
mixer
0 Without DHW heating priority
1 With DHW heating priority
Explanations
The flow temperature of the heat generator is higher
than the flow temperature of the heating circuit with
mixer by an adjustable differential temperature. See
also chapter "Function description".
8 Differential temperature in delivered condition 8 K
0 to 20 Differential temperature adjustable from 0 to 20 K