Viessmann VITODENS 200-W Service Instructions Manual page 44

Coding 1
Heating Circuit 1, 2 and 3
Select "Heating circuit ..."
Coding
Coding in the factory setting
Priority DHW heating
A2:2
Economy function outside temperature
A5:5
Parameter address A5:...
1
2
3
4
5
6
7
to
15
Coding in the factory setting
Extended economy function adjusted outside temperature
A6:36
44
DHW tank priority applicable to
heating circuit pump and mixing
valve
With heating circuit pump logic
function (economy mode):
Heating circuit pump "OFF"
when the outside temperature
(AT) is 1 K higher than the set
room temperature (RTset)
AT > RTset + 1 K
With heating circuit pump logic function: Heating circuit pump "OFF"
AT > RTset + 5 K
AT > RTset + 4 K
AT > RTset + 3 K
AT > RTset + 2 K
AT > RTset + 1 K
AT > RTset
AT > RTset - 1 K
AT > RTset - 9 K
Extended economy function
disabled
Vitodens 200-W B2HA 112, 150 Service
Possible change
A2:0 Without DHW tank priority
applied to heating circuit pump
and mixing valve.
A2:1 DHW tank priority only applicable
to mixing valve.
A2:3 Reduced priority applied to mixing
to valve (the heating circuit receives
A2:15 a reduced amount of energy).
A5:0 Without heating circuit pump
logic function.
A5:1 With heating circuit pump logic
to function: Heating circuit pump
A5:15 "OFF"; see following table.
Possible change
A6:5 Extended economy function
to enabled, i.e. the burner and
A6:35 heating circuit pump will stop
and the mixing valve close at
a variable value, adjustable
between 41 and 95°F (5 and
35°C) plus 1.8°F (1°C). The
base value is the adjusted outside
temperature. This value is based
on the actual outside temperature
and a time constant, which takes
the cooling down of an average
building into consideration.