Viessmann WB2-44 - Page 56

Additional Information
56
Control Unit for Weather-Responsive Operation
with programming unit
(continued)
Overview of coding addresses (continued)
Coding (factory
default setting)
Address: Value
Function mode Coding
change
Address: Value
Possible changes
0A9:098 Circulating
pump
Max. rotational speed of cir-
culating pump for DHW pro-
duction
0A9:001
to
0A9:100
*1
Lowest value for rotational speed of
circulating pump for DHW production
Highest value for rotational speed of
circulating pump for DHW production
0B2:___ Fault memory (see page 28)
0B3:___ Fault memory (see page 28)
0B4:___ Do not change
0B8:000 Space heating only - no DHW 0B8:001
0B8:002
0B8:005
0B8:006
With DHW heating
Optimum DHW heating (with anti legionnaire
function) (see page 48).
Combi boiler only
Not assigned. Must be changed to one of the
other coding addresses.
0C1:011 Freeze-up protection threshold
+34/+37ºFor+1/+3ºC
0C1:000
0C1:015
+50/+18ºFor+10/–8ºC
+41/+45ºFor+5/+7ºC
0C2:008 Do not change
0C5:000 Boiler See table below for effect of
external heat demand signal
(also see page 59)
0C5:001
*3
to
0C5:011
See table below for effect of external
heat demand signal
Possible coding changes for coding address 0C5 ”external heat demand”
*3
Coding Heating circuit
pump
Heating circuit with mixing valve
(extension kit)
Circulating pump
for tank heating
Boiler water
temperature
p
u
m
p
Heating circuit pump Mixing valve
f
o
r
t
a
n
k
h
e
a
t
i
n
g
t
e
m
p
e
r
a
t
u
r
e
0C5:000 ON OFF CLOSED OFF
Maintained at
d
i
d
l
0C5:001 OFF OFF CLOSED OFF
desired value
a
c
c
o
r
d
i
n
g
t
o
0C5:002 × OFF CLOSED OFF
a
c
c
o
r
d
i
n
g
t
o
coding address
”
0
A
2
”
0C5:003 OFF × × OFF
g
”0A2”
0C5:004 ON × × OFF
0C5:005 × × × OFF
0C5:006 OFF OFF CLOSED ×
0C5:007 ON OFF CLOSED ×
0C5:008 × OFF CLOSED ×
0C5:009 OFF × × ×
0C5:010 ON × × ×
0C5:011 × × × ×
× = in normal control mode
*1
One increment corresponds to approx. 20 rpm.
*2
This is set automatically when a tank temperature sensor is connected; can be reset to ”001” manually if required.
*3
Once this function has ended, the program changes automatically to the ”Space heating and DHW heating” mode.
5285 961 v1.3