Viessmann Vitodens 242-F Installation And Service Instructions Manual page 85

"Heating circuit ..."
Coding in the delivered condition
A6:36 Extended economy mode not ac-
tive
A7:0 Only for heating circuit with mixer:
Without mixer economy function
A8:1 Heating circuit with mixer creates a
demand for internal circulation
pump
A9:7 With pump idle time: Heating cir-
cuit pump "OFF" if set value is
modified by changing the operating
mode or changing the set room
temperature
b0:0 Only for heating circuit with mixer
and remote control:
Heating mode/reduced mode:
Weather-compensated
b2:8 Only for heating circuit with mixer
and remote control, and operation
with room temperature hook-up
must be programmed for the heat-
ing circuit:
Room influence factor 8
b5:0 Only for heating circuit with mixer
and remote control:
Without room temperature-de-
pendent heating circuit pump logic
function
Parameter address With heating circuit pump logic function:
b5:...
Heating circuit pump "OFF"
1 RT
2 RT
(cont.)
RT + 5 K
>
actual set
RT + 4 K
>
actual set
Possible change
A6:5 Extended economy mode enabled;
to i.e. at a variably adjustable value be-
A6:35 tween 5 and 35 °C, plus 1 °C, the
burner and heating circuit pump stop
and the mixer closes. The basis for
this is the adjusted outside tempera-
ture. The adjusted outside tempera-
ture is based on the actual outside
temperature and a time constant,
which takes into account the cooling
down of an average building.
A7:1 With mixer economy function (exten-
ded heating circuit pump logic):
Heating circuit pump also "OFF":
If the mixer has been trying to
■
close for longer than 20 min.
Heating circuit pump "ON":
If the mixer changes to control
■
function
If there is a risk of frost
■
A8:0 Heating circuit with mixer creates no
demand for internal circulation pump
A9:0 Without pump idle time
A9:1 With pump idle time, adjustable from
to 1 to 15.
A9:15 1 = short idle time
15 = long idle time
b0:1 Heating mode: Weather-compensa-
ted
Reduced mode: With room tempera-
ture hook-up
b0:2 Heating mode: With room tempera-
ture hook-up
Reduced mode: Weather-compen-
sated
b0:3 Heating mode/reduced mode: With
room temperature hook-up
b2:0 Without room influence
b2:1 Room influence factor adjustable
to from 1 to 64. The higher the value,
b2:64 the greater the room influence.
b5:1 Heating circuit pump logic function,
to see the following table.
b5:8
Heating circuit pump "ON"
RT < RT
actual set
RT < RT
actual set
Code 2
+ 4 K
+ 3 K
85