Viessmann VITOPEND 200 Installation And Service Instructions Manual page 62

Coding
Code 2
(cont.)
Coding in the delivered condition
Boiler circuit, mixer circuit
A6:36 Extended economy
function disabled (only
for weather‐compen-
sated control units)
A7:0 Without mixer economy
function (only for weath-
er‐compensated control
units)
A8:1 Heating circuit with
mixer M2 creates a de-
mand for the internal
circulation pump (only
for weather‐compen-
sated control units)
62
Possible change
A6:5 Extended economy func-
to tion 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 a mixer has been
closed for longer than
20 min.
Heating pump "ON":
& If the mixer changes to
control mode
& After cylinder heating
(for 20 min)
& If there is a risk of frost
A8:0 Heating circuit with mixer
M2 creates no demand
for the internal circulation
pump