Viessmann Vitotronic 200 KW2 Installation And Service Instructions Manual page 93

Code 2
(cont.)
Coding in the delivered condition
Boiler circuit/mixer circuit (cont.)
A5 : 5 With heating circuit pump
logic function (economy g
circuit):
Heating circuit pump OFF , if
the outside temperature
(AT) is 1 K higher than the
set room temperature
(RT )
set
AT > RT
A6 : 36 Extended economy circuit
not active
(
)
+ 1 K
set
Possible change
A5 : 0 Without heating circuit
y pump logic function
With heating circuit pump
logic function:
Heating circuit pump OFF , if
A5 : 1 AT > RT
A5 : 2 AT > RT
A5 : 3 AT > RT
A5 : 4 AT > RT
A5 : 5 AT > RT
A5 : 6 AT > RT
A5 : 7 AT > RT
to to
A5 : 15 AT > RT
A6 : 5 Extended economy circuit
to active, i. e. the burner and
A6 : 35 heating circuit pump will
be switched OFF , and the
mixer will be closed at a
variable value, adjustable
between 5 and 35 ºC plus
1 ºC. This value is based
on the adjusted outside
temperature, comprising
the actual outside
temperature and a time
constant.
The time constant takes
the cooling down of an
average building into
account.
Coding
+ 5 K
set
+ 4 K
set
+ 3 K
set
+ 2 K
set
+ 1 K
set
set
1 K
set
9 K
set
93