Viessmann Vitodens 300 Service Instructions Manual page 56

Coding
Code 2
(cont.)
Coding in Function mode
the as
delivered
condition
Address:
value
Boiler circuit, mixer circuit
A6:36 * 1 Extended economy
circuit inactive
A7:0 * 1 Without mixer econ-
omy function
*1
Only for weather-compensated control units.
56
Coding Possible change
change
Address:
value
A6:5 Extended economy cir-
to cuit enabled, i.e. the bur-
A6:35 ner and heating circuit
pump will be switched
OFF, and the mixer will
be closed at a variable
value, which is adjustable
between 5 and 35 °C plus
1 °C. This value is based
on the adjusted outside
temperature, comprising
the actual outside tem-
perature and a time con-
stant, which takes the
cooling down of an aver-
age building into consid-
eration.
A7:1 With mixer economy
function (extended heat-
ing circuit pump logic):
Heating circuit pump also
OFF, if the mixer was
closed for longer than
20 minutes. Heating
pump ON,
& if the mixer changes to
control mode
or
& after cylinder loading
(for 20 min.)
or
& if there is a risk of frost.