87
Coding in the delivered condition
Possible change
A6:36
Extended economy func-
tion
disabled
(only for
weather-compensated
control units)
A6:5
to
A6:35
Extended economy control
enabled, i.e. the burner and
heating circuit pump will be
switched OFF and the
mixer closed at a variable
adjustable value between 5
and 35 °C plus 1 °C. Base
value is the adjusted out-
side temperature. This
value is based on the
actual outside temperature
and a time constant that
takes the cooling down of
an average building into
consideration.
A7:0
Without mixer economy
function (only for a
weather-compensated
control unit and heating
circuit with mixer)
A7:1
With mixer economy func-
tion (extended heating cir-
cuit 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 function
■ If there is a risk of frost
A8:1
Heating circuit with mixer
creates a demand for the
internal circulation pump
(only for weather-com-
pensated control units)
A8:0
Heating circuit with mixer
creates no demand for the
internal circulation pump
A9:7
With pump idle time:
Heating circuit pump
"OFF" if the set value
changes through a
change in operating
mode or through a
change in the set room
temperature (only for
weather-compensated
control units)
A9:0
Without pump idle time
A9:1
to
A9:15
With pump idle time;
adjustable from 1 to 15
Code 2
Heating circuit 1, heating circuit 2, heating…
(cont.)
5457 552 GB
Service
Summary of Contents for FS2B
Page 163: ...163 5457 552 GB ...
