Viessmann VITOTRONIC 050 - Page 45

45
Coding
Coding 2 (cont.)
Coding in the factory default setting Possible change
General (cont.)
A6 : 36 Extended economy circuit inactive A6 : 5
to
A6 : 35
Extended economy circuit active, i.e. the
heating circuit pump will be switched OFF,
and the mixing valve closed at a variable
value, which is adjustable between 5 to 35°C
plus 1°C / 41 to 95°F plus 2°F.
This value is based on the adjusted outdoor
temperature, comprising the actual outdoor
temperature and a time constant which takes
the cooling down of an average building into
consideration.
A7 : 0 Without mixing valve economy function A7 : 1 With mixing valve economy function (exten-
ded heating circuit pump logic)
Heating circuit pump can also OFF, if the mi-
xing valve has been closed for longer than 12
minutes.
The heating circuit pump is switched ON again
when the mixing valve goes to its control
mode
when there is a risk of freezing
A9 : 7
With pump idle period:
H
e
a
t
i
n
g
c
i
r
c
u
i
t
p
u
m
p
O
F
F
d
u
r
i
n
g
s
e
t
v
a
l
u
e
A0 : 0
Without pump idle period
H
e
a
t
i
n
g
c
i
r
c
u
i
t
p
u
m
p
O
F
F
d
u
r
i
n
g
s
e
t
v
a
l
u
e
modification (by changing the operating
mode or changes on the rotary dial ts or
key tm )
A9 : 1
to
A9 : 15
With pump idle period adjustable from 1 to 15
AA : 2 With LON communication module:
W
i
t
h
o
u
t
p
u
t
r
e
d
u
c
t
i
o
n
v
i
a
t
e
m
p
e
r
a
t
u
r
e
s
e
n
-
AA : 0 Without output reduction
W
i
t
h
o
u
t
p
u
t
r
e
d
u
c
t
i
o
n
v
i
a
t
e
m
p
e
r
a
t
u
r
e
s
e
n
-
sor aJA of the boiler control unit
AA : 1 Without function
b0 : 0 With remote control:
Heating mode/ red. mode:
weather-compensated
b0 : 1 Heating mode:
weather compensated
Red. mode:
with room temperature connection
b0 : 2 Heating mode:
with room temperature connection
Red. mode:
weather compensated
b0 : 3 Heating mode/ red. mode:
with room temperature connection
b2 : 8 With remote control unit and for the heating
c
i
r
c
u
i
t
,
h
e
a
t
i
n
g
w
i
t
h
r
o
o
m
t
e
m
p
e
r
a
t
u
r
e
c
o
n
t
r
o
l
b2 : 0 Without room influence
b
2
:
8
W
i
t
h
r
e
m
o
t
e
c
o
n
t
r
o
l
u
n
i
t
a
n
d
f
o
r
t
h
e
h
e
a
t
i
n
g
circuit, heating with room temperature control
must be coded
Room influence factor: 8
b2 : 1
to
b2 : 31
Room influence factor adjustable
from 1 to 31
5285 967 v1.2